* Basic perf PMU support for Haswell v2
@ 2013-01-31 22:51 Andi Kleen
2013-01-31 22:51 ` [PATCH 01/12] perf, x86: Add PEBSv2 record support Andi Kleen
` (11 more replies)
0 siblings, 12 replies; 23+ messages in thread
From: Andi Kleen @ 2013-01-31 22:51 UTC (permalink / raw)
To: mingo; +Cc: linux-kernel, a.p.zijlstra, akpm, acme, eranian, jolsa, namhyung
This is based on v7 of the full Haswell PMU support, but
ported to the latest perf/core and stripped down to the "basic support"
as requested. I consider all of this basic support for Haswell usage.
although it's a bit more than what you need if you never use -e cpu//
or -b options. I decided to include LBRs in the basic support.
Contains support for:
- Basic Haswell PMU and PEBS support
- Late unmasking of the PMI
- Support for wide counters
- New TSX counter flags, exported as sysfs attributes
- Support for checkpointed counters.
- New LBR flags, exported as new flags with tools support
Available from
git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-misc hsw/pmu5-basics
For more details on the Haswell PMU please see the SDM (Vol 3A, Chapter 19.2)
http://www.intel.com/content/www/us/en/processors/architectures-software-developer-manuals.html
For more details on TSX please see http://halobates.de/adding-lock-elision-to-linux.pdf
or next week's LWN.
v2: Addressed Stephane's feedback. See individual patches for details.
-Andi
^ permalink raw reply [flat|nested] 23+ messages in thread
* [PATCH 01/12] perf, x86: Add PEBSv2 record support
2013-01-31 22:51 Basic perf PMU support for Haswell v2 Andi Kleen
@ 2013-01-31 22:51 ` Andi Kleen
2013-02-01 17:18 ` Stephane Eranian
2013-01-31 22:51 ` [PATCH 02/12] perf, x86: Basic Haswell PMU support v3 Andi Kleen
` (10 subsequent siblings)
11 siblings, 1 reply; 23+ messages in thread
From: Andi Kleen @ 2013-01-31 22:51 UTC (permalink / raw)
To: mingo
Cc: linux-kernel, a.p.zijlstra, akpm, acme, eranian, jolsa, namhyung,
Andi Kleen
From: Andi Kleen <ak@linux.intel.com>
Add support for the v2 PEBS format. It has a superset of the v1 PEBS
fields, but has a longer record so we need to adjust the code paths.
The main advantage is the new "EventingRip" support which directly
gives the instruction, not off-by-one instruction. So with precise == 2
we use that directly and don't try to use LBRs and walking basic blocks.
This lowers the overhead significantly.
Some other features are added in later patches.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
arch/x86/kernel/cpu/perf_event.c | 2 +-
arch/x86/kernel/cpu/perf_event_intel_ds.c | 101 ++++++++++++++++++++++-------
2 files changed, 79 insertions(+), 24 deletions(-)
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index 6774c17..c95290a 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -397,7 +397,7 @@ int x86_pmu_hw_config(struct perf_event *event)
* check that PEBS LBR correction does not conflict with
* whatever the user is asking with attr->branch_sample_type
*/
- if (event->attr.precise_ip > 1) {
+ if (event->attr.precise_ip > 1 && x86_pmu.intel_cap.pebs_format < 2) {
u64 *br_type = &event->attr.branch_sample_type;
if (has_branch_stack(event)) {
diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c
index 826054a..9d0dae0 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_ds.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c
@@ -41,6 +41,12 @@ struct pebs_record_nhm {
u64 status, dla, dse, lat;
};
+struct pebs_record_v2 {
+ struct pebs_record_nhm nhm;
+ u64 eventingrip;
+ u64 tsx_tuning;
+};
+
void init_debug_store_on_cpu(int cpu)
{
struct debug_store *ds = per_cpu(cpu_hw_events, cpu).ds;
@@ -559,8 +565,7 @@ static void __intel_pmu_pebs_event(struct perf_event *event,
{
/*
* We cast to pebs_record_core since that is a subset of
- * both formats and we don't use the other fields in this
- * routine.
+ * both formats.
*/
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
struct pebs_record_core *pebs = __pebs;
@@ -588,7 +593,10 @@ static void __intel_pmu_pebs_event(struct perf_event *event,
regs.bp = pebs->bp;
regs.sp = pebs->sp;
- if (event->attr.precise_ip > 1 && intel_pmu_pebs_fixup_ip(®s))
+ if (event->attr.precise_ip > 1 && x86_pmu.intel_cap.pebs_format >= 2) {
+ regs.ip = ((struct pebs_record_v2 *)pebs)->eventingrip;
+ regs.flags |= PERF_EFLAGS_EXACT;
+ } else if (event->attr.precise_ip > 1 && intel_pmu_pebs_fixup_ip(®s))
regs.flags |= PERF_EFLAGS_EXACT;
else
regs.flags &= ~PERF_EFLAGS_EXACT;
@@ -641,35 +649,21 @@ static void intel_pmu_drain_pebs_core(struct pt_regs *iregs)
__intel_pmu_pebs_event(event, iregs, at);
}
-static void intel_pmu_drain_pebs_nhm(struct pt_regs *iregs)
+static void intel_pmu_drain_pebs_common(struct pt_regs *iregs, void *at,
+ void *top)
{
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
struct debug_store *ds = cpuc->ds;
- struct pebs_record_nhm *at, *top;
struct perf_event *event = NULL;
u64 status = 0;
- int bit, n;
-
- if (!x86_pmu.pebs_active)
- return;
-
- at = (struct pebs_record_nhm *)(unsigned long)ds->pebs_buffer_base;
- top = (struct pebs_record_nhm *)(unsigned long)ds->pebs_index;
+ int bit;
ds->pebs_index = ds->pebs_buffer_base;
- n = top - at;
- if (n <= 0)
- return;
+ for ( ; at < top; at += x86_pmu.pebs_record_size) {
+ struct pebs_record_nhm *p = at;
- /*
- * Should not happen, we program the threshold at 1 and do not
- * set a reset value.
- */
- WARN_ONCE(n > x86_pmu.max_pebs_events, "Unexpected number of pebs records %d\n", n);
-
- for ( ; at < top; at++) {
- for_each_set_bit(bit, (unsigned long *)&at->status, x86_pmu.max_pebs_events) {
+ for_each_set_bit(bit, (unsigned long *)&p->status, x86_pmu.max_pebs_events) {
event = cpuc->events[bit];
if (!test_bit(bit, cpuc->active_mask))
continue;
@@ -692,6 +686,61 @@ static void intel_pmu_drain_pebs_nhm(struct pt_regs *iregs)
}
}
+static void intel_pmu_drain_pebs_nhm(struct pt_regs *iregs)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+ struct debug_store *ds = cpuc->ds;
+ struct pebs_record_nhm *at, *top;
+ int n;
+
+ if (!x86_pmu.pebs_active)
+ return;
+
+ at = (struct pebs_record_nhm *)(unsigned long)ds->pebs_buffer_base;
+ top = (struct pebs_record_nhm *)(unsigned long)ds->pebs_index;
+
+ ds->pebs_index = ds->pebs_buffer_base;
+
+ n = top - at;
+ if (n <= 0)
+ return;
+
+ /*
+ * Should not happen, we program the threshold at 1 and do not
+ * set a reset value.
+ */
+ WARN_ONCE(n > x86_pmu.max_pebs_events,
+ "Unexpected number of pebs records %d\n", n);
+
+ return intel_pmu_drain_pebs_common(iregs, at, top);
+}
+
+static void intel_pmu_drain_pebs_v2(struct pt_regs *iregs)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+ struct debug_store *ds = cpuc->ds;
+ struct pebs_record_v2 *at, *top;
+ int n;
+
+ if (!x86_pmu.pebs_active)
+ return;
+
+ at = (struct pebs_record_v2 *)(unsigned long)ds->pebs_buffer_base;
+ top = (struct pebs_record_v2 *)(unsigned long)ds->pebs_index;
+
+ n = top - at;
+ if (n <= 0)
+ return;
+ /*
+ * Should not happen, we program the threshold at 1 and do not
+ * set a reset value.
+ */
+ WARN_ONCE(n > x86_pmu.max_pebs_events,
+ "Unexpected number of pebs records %d\n", n);
+
+ return intel_pmu_drain_pebs_common(iregs, at, top);
+}
+
/*
* BTS, PEBS probe and setup
*/
@@ -723,6 +772,12 @@ void intel_ds_init(void)
x86_pmu.drain_pebs = intel_pmu_drain_pebs_nhm;
break;
+ case 2:
+ printk(KERN_CONT "PEBS fmt2%c, ", pebs_type);
+ x86_pmu.pebs_record_size = sizeof(struct pebs_record_v2);
+ x86_pmu.drain_pebs = intel_pmu_drain_pebs_v2;
+ break;
+
default:
printk(KERN_CONT "no PEBS fmt%d%c, ", format, pebs_type);
x86_pmu.pebs = 0;
--
1.7.7.6
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 02/12] perf, x86: Basic Haswell PMU support v3
2013-01-31 22:51 Basic perf PMU support for Haswell v2 Andi Kleen
2013-01-31 22:51 ` [PATCH 01/12] perf, x86: Add PEBSv2 record support Andi Kleen
@ 2013-01-31 22:51 ` Andi Kleen
2013-02-01 17:22 ` Stephane Eranian
2013-01-31 22:51 ` [PATCH 03/12] perf, x86: Basic Haswell PEBS support v4 Andi Kleen
` (9 subsequent siblings)
11 siblings, 1 reply; 23+ messages in thread
From: Andi Kleen @ 2013-01-31 22:51 UTC (permalink / raw)
To: mingo
Cc: linux-kernel, a.p.zijlstra, akpm, acme, eranian, jolsa, namhyung,
Andi Kleen
From: Andi Kleen <ak@linux.intel.com>
Add basic Haswell PMU support.
Similar to SandyBridge, but has a few new events. Further
differences are handled in followon patches.
There are some new counter flags that need to be prevented
from being set on fixed counters.
Contains fixes from Stephane Eranian
v2: Folded TSX bits into standard FIXED_EVENT_CONSTRAINTS
v3: Use SNB LBR init code. Comment fix (Stephane Eranian)
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
arch/x86/include/asm/perf_event.h | 3 +++
arch/x86/kernel/cpu/perf_event.h | 5 ++++-
arch/x86/kernel/cpu/perf_event_intel.c | 31 ++++++++++++++++++++++++++++++-
3 files changed, 37 insertions(+), 2 deletions(-)
diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h
index 4fabcdf..4003bb6 100644
--- a/arch/x86/include/asm/perf_event.h
+++ b/arch/x86/include/asm/perf_event.h
@@ -29,6 +29,9 @@
#define ARCH_PERFMON_EVENTSEL_INV (1ULL << 23)
#define ARCH_PERFMON_EVENTSEL_CMASK 0xFF000000ULL
+#define HSW_INTX (1ULL << 32)
+#define HSW_INTX_CHECKPOINTED (1ULL << 33)
+
#define AMD_PERFMON_EVENTSEL_GUESTONLY (1ULL << 40)
#define AMD_PERFMON_EVENTSEL_HOSTONLY (1ULL << 41)
diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
index 115c1ea..8941899 100644
--- a/arch/x86/kernel/cpu/perf_event.h
+++ b/arch/x86/kernel/cpu/perf_event.h
@@ -219,11 +219,14 @@ struct cpu_hw_events {
* - inv
* - edge
* - cnt-mask
+ * - intx
+ * - intx_cp
* The other filters are supported by fixed counters.
* The any-thread option is supported starting with v3.
*/
+#define FIXED_EVENT_FLAGS (X86_RAW_EVENT_MASK|HSW_INTX|HSW_INTX_CHECKPOINTED)
#define FIXED_EVENT_CONSTRAINT(c, n) \
- EVENT_CONSTRAINT(c, (1ULL << (32+n)), X86_RAW_EVENT_MASK)
+ EVENT_CONSTRAINT(c, (1ULL << (32+n)), FIXED_EVENT_FLAGS)
/*
* Constraint on the Event code + UMask
diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
index 93b9e11..78045e5 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -101,7 +101,7 @@ static struct event_constraint intel_snb_event_constraints[] __read_mostly =
FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */
FIXED_EVENT_CONSTRAINT(0x0300, 2), /* CPU_CLK_UNHALTED.REF */
- INTEL_EVENT_CONSTRAINT(0x48, 0x4), /* L1D_PEND_MISS.PENDING */
+ INTEL_EVENT_CONSTRAINT(0x48, 0x4), /* L1D_PEND_MISS.* */
INTEL_UEVENT_CONSTRAINT(0x01c0, 0x2), /* INST_RETIRED.PREC_DIST */
INTEL_EVENT_CONSTRAINT(0xcd, 0x8), /* MEM_TRANS_RETIRED.LOAD_LATENCY */
EVENT_CONSTRAINT_END
@@ -133,6 +133,17 @@ static struct extra_reg intel_snb_extra_regs[] __read_mostly = {
EVENT_EXTRA_END
};
+static struct event_constraint intel_hsw_event_constraints[] =
+{
+ FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
+ FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */
+ FIXED_EVENT_CONSTRAINT(0x0300, 2), /* CPU_CLK_UNHALTED.REF */
+ INTEL_EVENT_CONSTRAINT(0x48, 0x4), /* L1D_PEND_MISS.PENDING */
+ INTEL_UEVENT_CONSTRAINT(0x01c0, 0x2), /* INST_RETIRED.PREC_DIST */
+ INTEL_EVENT_CONSTRAINT(0xcd, 0x8), /* MEM_TRANS_RETIRED.LOAD_LATENCY */
+ EVENT_CONSTRAINT_END
+};
+
static u64 intel_pmu_event_map(int hw_event)
{
return intel_perfmon_event_map[hw_event];
@@ -2107,6 +2118,24 @@ __init int intel_pmu_init(void)
break;
+ case 60: /* Haswell Client */
+ case 70:
+ case 71:
+ memcpy(hw_cache_event_ids, snb_hw_cache_event_ids,
+ sizeof(hw_cache_event_ids));
+
+ intel_pmu_lbr_init_snb();
+
+ x86_pmu.event_constraints = intel_hsw_event_constraints;
+
+ x86_pmu.extra_regs = intel_snb_extra_regs;
+ /* all extra regs are per-cpu when HT is on */
+ x86_pmu.er_flags |= ERF_HAS_RSP_1;
+ x86_pmu.er_flags |= ERF_NO_HT_SHARING;
+
+ pr_cont("Haswell events, ");
+ break;
+
default:
switch (x86_pmu.version) {
case 1:
--
1.7.7.6
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 03/12] perf, x86: Basic Haswell PEBS support v4
2013-01-31 22:51 Basic perf PMU support for Haswell v2 Andi Kleen
2013-01-31 22:51 ` [PATCH 01/12] perf, x86: Add PEBSv2 record support Andi Kleen
2013-01-31 22:51 ` [PATCH 02/12] perf, x86: Basic Haswell PMU support v3 Andi Kleen
@ 2013-01-31 22:51 ` Andi Kleen
2013-02-01 17:26 ` Stephane Eranian
2013-01-31 22:51 ` [PATCH 04/12] perf, x86: Support the TSX intx/intx_cp qualifiers v3 Andi Kleen
` (8 subsequent siblings)
11 siblings, 1 reply; 23+ messages in thread
From: Andi Kleen @ 2013-01-31 22:51 UTC (permalink / raw)
To: mingo
Cc: linux-kernel, a.p.zijlstra, akpm, acme, eranian, jolsa, namhyung,
Andi Kleen
From: Andi Kleen <ak@linux.intel.com>
Add basic PEBS support for Haswell.
The constraints are similar to SandyBridge with a few new events.
v2: Readd missing pebs_aliases
v3: Readd missing hunk. Fix some constraints.
v4: Fix typo in PEBS event table (Stephane Eranian)
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
arch/x86/kernel/cpu/perf_event.h | 2 ++
arch/x86/kernel/cpu/perf_event_intel.c | 6 ++++--
arch/x86/kernel/cpu/perf_event_intel_ds.c | 29 +++++++++++++++++++++++++++++
3 files changed, 35 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
index 8941899..1567b0d 100644
--- a/arch/x86/kernel/cpu/perf_event.h
+++ b/arch/x86/kernel/cpu/perf_event.h
@@ -596,6 +596,8 @@ extern struct event_constraint intel_snb_pebs_event_constraints[];
extern struct event_constraint intel_ivb_pebs_event_constraints[];
+extern struct event_constraint intel_hsw_pebs_event_constraints[];
+
struct event_constraint *intel_pebs_constraints(struct perf_event *event);
void intel_pmu_pebs_enable(struct perf_event *event);
diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
index 78045e5..8163ebf 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -826,7 +826,8 @@ static inline bool intel_pmu_needs_lbr_smpl(struct perf_event *event)
return true;
/* implicit branch sampling to correct PEBS skid */
- if (x86_pmu.intel_cap.pebs_trap && event->attr.precise_ip > 1)
+ if (x86_pmu.intel_cap.pebs_trap && event->attr.precise_ip > 1 &&
+ x86_pmu.intel_cap.pebs_format < 2)
return true;
return false;
@@ -2127,8 +2128,9 @@ __init int intel_pmu_init(void)
intel_pmu_lbr_init_snb();
x86_pmu.event_constraints = intel_hsw_event_constraints;
-
+ x86_pmu.pebs_constraints = intel_hsw_pebs_event_constraints;
x86_pmu.extra_regs = intel_snb_extra_regs;
+ x86_pmu.pebs_aliases = intel_pebs_aliases_snb;
/* all extra regs are per-cpu when HT is on */
x86_pmu.er_flags |= ERF_HAS_RSP_1;
x86_pmu.er_flags |= ERF_NO_HT_SHARING;
diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c
index 9d0dae0..0252930 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_ds.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c
@@ -427,6 +427,35 @@ struct event_constraint intel_ivb_pebs_event_constraints[] = {
EVENT_CONSTRAINT_END
};
+struct event_constraint intel_hsw_pebs_event_constraints[] = {
+ INTEL_UEVENT_CONSTRAINT(0x01c0, 0x2), /* INST_RETIRED.PRECDIST */
+ INTEL_UEVENT_CONSTRAINT(0x01c2, 0xf), /* UOPS_RETIRED.ALL */
+ INTEL_UEVENT_CONSTRAINT(0x02c2, 0xf), /* UOPS_RETIRED.RETIRE_SLOTS */
+ INTEL_EVENT_CONSTRAINT(0xc4, 0xf), /* BR_INST_RETIRED.* */
+ INTEL_UEVENT_CONSTRAINT(0x01c5, 0xf), /* BR_MISP_RETIRED.CONDITIONAL */
+ INTEL_UEVENT_CONSTRAINT(0x04c5, 0xf), /* BR_MISP_RETIRED.ALL_BRANCHES */
+ INTEL_UEVENT_CONSTRAINT(0x20c5, 0xf), /* BR_MISP_RETIRED.NEAR_TAKEN */
+ INTEL_EVENT_CONSTRAINT(0xcd, 0x8), /* MEM_TRANS_RETIRED.* */
+ INTEL_UEVENT_CONSTRAINT(0x11d0, 0xf), /* MEM_UOPS_RETIRED.STLB_MISS_LOADS */
+ INTEL_UEVENT_CONSTRAINT(0x12d0, 0xf), /* MEM_UOPS_RETIRED.STLB_MISS_STORES */
+ INTEL_UEVENT_CONSTRAINT(0x21d0, 0xf), /* MEM_UOPS_RETIRED.LOCK_LOADS */
+ INTEL_UEVENT_CONSTRAINT(0x41d0, 0xf), /* MEM_UOPS_RETIRED.SPLIT_LOADS */
+ INTEL_UEVENT_CONSTRAINT(0x42d0, 0xf), /* MEM_UOPS_RETIRED.SPLIT_STORES */
+ INTEL_UEVENT_CONSTRAINT(0x81d0, 0xf), /* MEM_UOPS_RETIRED.ALL_LOADS */
+ INTEL_UEVENT_CONSTRAINT(0x82d0, 0xf), /* MEM_UOPS_RETIRED.ALL_STORES */
+ INTEL_UEVENT_CONSTRAINT(0x01d1, 0xf), /* MEM_LOAD_UOPS_RETIRED.L1_HIT */
+ INTEL_UEVENT_CONSTRAINT(0x02d1, 0xf), /* MEM_LOAD_UOPS_RETIRED.L2_HIT */
+ INTEL_UEVENT_CONSTRAINT(0x04d1, 0xf), /* MEM_LOAD_UOPS_RETIRED.L3_HIT */
+ INTEL_UEVENT_CONSTRAINT(0x40d1, 0xf), /* MEM_LOAD_UOPS_RETIRED.HIT_LFB */
+ INTEL_UEVENT_CONSTRAINT(0x01d2, 0xf), /* MEM_LOAD_UOPS_LLC_HIT_RETIRED.XSNP_MISS */
+ INTEL_UEVENT_CONSTRAINT(0x02d2, 0xf), /* MEM_LOAD_UOPS_LLC_HIT_RETIRED.XSNP_HIT */
+ INTEL_UEVENT_CONSTRAINT(0x01d3, 0xf), /* MEM_LOAD_UOPS_LLC_MISS_RETIRED.LOCAL_DRAM */
+ INTEL_UEVENT_CONSTRAINT(0x04c8, 0xf), /* HLE_RETIRED.Abort */
+ INTEL_UEVENT_CONSTRAINT(0x04c9, 0xf), /* RTM_RETIRED.Abort */
+
+ EVENT_CONSTRAINT_END
+};
+
struct event_constraint *intel_pebs_constraints(struct perf_event *event)
{
struct event_constraint *c;
--
1.7.7.6
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 04/12] perf, x86: Support the TSX intx/intx_cp qualifiers v3
2013-01-31 22:51 Basic perf PMU support for Haswell v2 Andi Kleen
` (2 preceding siblings ...)
2013-01-31 22:51 ` [PATCH 03/12] perf, x86: Basic Haswell PEBS support v4 Andi Kleen
@ 2013-01-31 22:51 ` Andi Kleen
2013-02-01 10:16 ` Ingo Molnar
2013-01-31 22:51 ` [PATCH 05/12] perf, x86: Support Haswell v4 LBR format Andi Kleen
` (7 subsequent siblings)
11 siblings, 1 reply; 23+ messages in thread
From: Andi Kleen @ 2013-01-31 22:51 UTC (permalink / raw)
To: mingo
Cc: linux-kernel, a.p.zijlstra, akpm, acme, eranian, jolsa, namhyung,
Andi Kleen
From: Andi Kleen <ak@linux.intel.com>
Implement the TSX transaction and checkpointed transaction qualifiers for
Haswell. This allows e.g. to profile the number of cycles in transactions.
The checkpointed qualifier requires forcing the event to
counter 2, implement this with a custom constraint for Haswell.
Also add sysfs format attributes for intx/intx_cp
[Updated from earlier version that used generic attributes, now does
raw + sysfs formats]
v2: Moved bad hunk. Forbid some bad combinations.
v3: Use EOPNOTSUPP. White space fixes (Stephane Eranian)
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
arch/x86/kernel/cpu/perf_event_intel.c | 62 ++++++++++++++++++++++++++++++++
1 files changed, 62 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
index 8163ebf..f8d26c2 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -13,6 +13,7 @@
#include <linux/slab.h>
#include <linux/export.h>
+#include <asm/cpufeature.h>
#include <asm/hardirq.h>
#include <asm/apic.h>
@@ -1597,6 +1598,45 @@ static void core_pmu_enable_all(int added)
}
}
+static int hsw_hw_config(struct perf_event *event)
+{
+ int ret = intel_pmu_hw_config(event);
+
+ if (ret)
+ return ret;
+ if (!boot_cpu_has(X86_FEATURE_RTM) && !boot_cpu_has(X86_FEATURE_HLE))
+ return 0;
+ event->hw.config |= event->attr.config & (HSW_INTX|HSW_INTX_CHECKPOINTED);
+
+ /*
+ * INTX/INTX-CP do not play well with PEBS or ANY thread mode.
+ */
+ if ((event->hw.config & (HSW_INTX|HSW_INTX_CHECKPOINTED)) &&
+ ((event->hw.config & ARCH_PERFMON_EVENTSEL_ANY) ||
+ event->attr.precise_ip > 0))
+ return -EOPNOTSUPP;
+
+ return 0;
+}
+
+static struct event_constraint counter2_constraint =
+ EVENT_CONSTRAINT(0, 0x4, 0);
+
+static struct event_constraint *
+hsw_get_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event)
+{
+ struct event_constraint *c = intel_get_event_constraints(cpuc, event);
+
+ /* Handle special quirk on intx_checkpointed only in counter 2 */
+ if (event->hw.config & HSW_INTX_CHECKPOINTED) {
+ if (c->idxmsk64 & (1U << 2))
+ return &counter2_constraint;
+ return &emptyconstraint;
+ }
+
+ return c;
+}
+
PMU_FORMAT_ATTR(event, "config:0-7" );
PMU_FORMAT_ATTR(umask, "config:8-15" );
PMU_FORMAT_ATTR(edge, "config:18" );
@@ -1604,6 +1644,8 @@ PMU_FORMAT_ATTR(pc, "config:19" );
PMU_FORMAT_ATTR(any, "config:21" ); /* v3 + */
PMU_FORMAT_ATTR(inv, "config:23" );
PMU_FORMAT_ATTR(cmask, "config:24-31" );
+PMU_FORMAT_ATTR(intx, "config:32" );
+PMU_FORMAT_ATTR(intx_cp,"config:33" );
static struct attribute *intel_arch_formats_attr[] = {
&format_attr_event.attr,
@@ -1761,6 +1803,23 @@ static struct attribute *intel_arch3_formats_attr[] = {
NULL,
};
+/* Arch3 + TSX support */
+static struct attribute *intel_hsw_formats_attr[] __read_mostly = {
+ &format_attr_event.attr,
+ &format_attr_umask.attr,
+ &format_attr_edge.attr,
+ &format_attr_pc.attr,
+ &format_attr_any.attr,
+ &format_attr_inv.attr,
+ &format_attr_cmask.attr,
+ &format_attr_intx.attr,
+ &format_attr_intx_cp.attr,
+
+ &format_attr_offcore_rsp.attr, /* XXX do NHM/WSM + SNB breakout */
+ NULL,
+};
+
+
static __initconst const struct x86_pmu intel_pmu = {
.name = "Intel",
.handle_irq = intel_pmu_handle_irq,
@@ -2135,6 +2194,9 @@ __init int intel_pmu_init(void)
x86_pmu.er_flags |= ERF_HAS_RSP_1;
x86_pmu.er_flags |= ERF_NO_HT_SHARING;
+ x86_pmu.hw_config = hsw_hw_config;
+ x86_pmu.get_event_constraints = hsw_get_event_constraints;
+ x86_pmu.format_attrs = intel_hsw_formats_attr;
pr_cont("Haswell events, ");
break;
--
1.7.7.6
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 05/12] perf, x86: Support Haswell v4 LBR format
2013-01-31 22:51 Basic perf PMU support for Haswell v2 Andi Kleen
` (3 preceding siblings ...)
2013-01-31 22:51 ` [PATCH 04/12] perf, x86: Support the TSX intx/intx_cp qualifiers v3 Andi Kleen
@ 2013-01-31 22:51 ` Andi Kleen
2013-01-31 22:51 ` [PATCH 06/12] perf, x86: Support full width counting Andi Kleen
` (6 subsequent siblings)
11 siblings, 0 replies; 23+ messages in thread
From: Andi Kleen @ 2013-01-31 22:51 UTC (permalink / raw)
To: mingo
Cc: linux-kernel, a.p.zijlstra, akpm, acme, eranian, jolsa, namhyung,
Andi Kleen
From: Andi Kleen <ak@linux.intel.com>
Haswell has two additional LBR from flags for TSX: intx and abort, implemented
as a new v4 version of the LBR format.
Handle those in and adjust the sign extension code to still correctly extend.
The flags are exported similarly in the LBR record to the existing misprediction
flag
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
arch/x86/kernel/cpu/perf_event_intel_lbr.c | 18 +++++++++++++++---
include/linux/perf_event.h | 7 ++++++-
2 files changed, 21 insertions(+), 4 deletions(-)
diff --git a/arch/x86/kernel/cpu/perf_event_intel_lbr.c b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
index da02e9c..2af6695b 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_lbr.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
@@ -12,6 +12,7 @@ enum {
LBR_FORMAT_LIP = 0x01,
LBR_FORMAT_EIP = 0x02,
LBR_FORMAT_EIP_FLAGS = 0x03,
+ LBR_FORMAT_EIP_FLAGS2 = 0x04,
};
/*
@@ -56,6 +57,8 @@ enum {
LBR_FAR)
#define LBR_FROM_FLAG_MISPRED (1ULL << 63)
+#define LBR_FROM_FLAG_INTX (1ULL << 62)
+#define LBR_FROM_FLAG_ABORT (1ULL << 61)
#define for_each_branch_sample_type(x) \
for ((x) = PERF_SAMPLE_BRANCH_USER; \
@@ -270,21 +273,30 @@ static void intel_pmu_lbr_read_64(struct cpu_hw_events *cpuc)
for (i = 0; i < x86_pmu.lbr_nr; i++) {
unsigned long lbr_idx = (tos - i) & mask;
- u64 from, to, mis = 0, pred = 0;
+ u64 from, to, mis = 0, pred = 0, intx = 0, abort = 0;
rdmsrl(x86_pmu.lbr_from + lbr_idx, from);
rdmsrl(x86_pmu.lbr_to + lbr_idx, to);
- if (lbr_format == LBR_FORMAT_EIP_FLAGS) {
+ if (lbr_format == LBR_FORMAT_EIP_FLAGS ||
+ lbr_format == LBR_FORMAT_EIP_FLAGS2) {
mis = !!(from & LBR_FROM_FLAG_MISPRED);
pred = !mis;
- from = (u64)((((s64)from) << 1) >> 1);
+ if (lbr_format == LBR_FORMAT_EIP_FLAGS)
+ from = (u64)((((s64)from) << 1) >> 1);
+ else if (lbr_format == LBR_FORMAT_EIP_FLAGS2) {
+ intx = !!(from & LBR_FROM_FLAG_INTX);
+ abort = !!(from & LBR_FROM_FLAG_ABORT);
+ from = (u64)((((s64)from) << 3) >> 3);
+ }
}
cpuc->lbr_entries[i].from = from;
cpuc->lbr_entries[i].to = to;
cpuc->lbr_entries[i].mispred = mis;
cpuc->lbr_entries[i].predicted = pred;
+ cpuc->lbr_entries[i].intx = intx;
+ cpuc->lbr_entries[i].abort = abort;
cpuc->lbr_entries[i].reserved = 0;
}
cpuc->lbr_stack.nr = i;
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 6bfb2faa..91052e1 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -74,13 +74,18 @@ struct perf_raw_record {
*
* support for mispred, predicted is optional. In case it
* is not supported mispred = predicted = 0.
+ *
+ * intx: running in a hardware transaction
+ * abort: aborting a hardware transaction
*/
struct perf_branch_entry {
__u64 from;
__u64 to;
__u64 mispred:1, /* target mispredicted */
predicted:1,/* target predicted */
- reserved:62;
+ intx:1, /* in transaction */
+ abort:1, /* transaction abort */
+ reserved:60;
};
/*
--
1.7.7.6
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 06/12] perf, x86: Support full width counting
2013-01-31 22:51 Basic perf PMU support for Haswell v2 Andi Kleen
` (4 preceding siblings ...)
2013-01-31 22:51 ` [PATCH 05/12] perf, x86: Support Haswell v4 LBR format Andi Kleen
@ 2013-01-31 22:51 ` Andi Kleen
2013-01-31 22:51 ` [PATCH 07/12] perf, x86: Avoid checkpointed counters causing excessive TSX aborts v4 Andi Kleen
` (5 subsequent siblings)
11 siblings, 0 replies; 23+ messages in thread
From: Andi Kleen @ 2013-01-31 22:51 UTC (permalink / raw)
To: mingo
Cc: linux-kernel, a.p.zijlstra, akpm, acme, eranian, jolsa, namhyung,
Andi Kleen
From: Andi Kleen <ak@linux.intel.com>
Recent Intel CPUs have a new alternative MSR range for perfctrs that allows
writing the full counter width. Enable this range if the hardware reports it
using a new capability bit. This lowers overhead of perf stat slightly because
it has to do less interrupts to accumulate the counter value. On Haswell it
also avoids some problems with TSX aborting when the end of the counter
range is reached.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
arch/x86/include/uapi/asm/msr-index.h | 3 +++
arch/x86/kernel/cpu/perf_event.h | 1 +
arch/x86/kernel/cpu/perf_event_intel.c | 6 ++++++
3 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/uapi/asm/msr-index.h b/arch/x86/include/uapi/asm/msr-index.h
index 433a59f..af41a77 100644
--- a/arch/x86/include/uapi/asm/msr-index.h
+++ b/arch/x86/include/uapi/asm/msr-index.h
@@ -163,6 +163,9 @@
#define MSR_KNC_EVNTSEL0 0x00000028
#define MSR_KNC_EVNTSEL1 0x00000029
+/* Alternative perfctr range with full access. */
+#define MSR_IA32_PMC0 0x000004c1
+
/* AMD64 MSRs. Not complete. See the architecture manual for a more
complete list. */
diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
index 1567b0d..ce2a863 100644
--- a/arch/x86/kernel/cpu/perf_event.h
+++ b/arch/x86/kernel/cpu/perf_event.h
@@ -278,6 +278,7 @@ union perf_capabilities {
u64 pebs_arch_reg:1;
u64 pebs_format:4;
u64 smm_freeze:1;
+ u64 fw_write:1;
};
u64 capabilities;
};
diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
index f8d26c2..9e11295 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -2248,5 +2248,11 @@ __init int intel_pmu_init(void)
}
}
+ /* Support full width counters using alternative MSR range */
+ if (x86_pmu.intel_cap.fw_write) {
+ x86_pmu.max_period = x86_pmu.cntval_mask;
+ x86_pmu.perfctr = MSR_IA32_PMC0;
+ }
+
return 0;
}
--
1.7.7.6
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 07/12] perf, x86: Avoid checkpointed counters causing excessive TSX aborts v4
2013-01-31 22:51 Basic perf PMU support for Haswell v2 Andi Kleen
` (5 preceding siblings ...)
2013-01-31 22:51 ` [PATCH 06/12] perf, x86: Support full width counting Andi Kleen
@ 2013-01-31 22:51 ` Andi Kleen
2013-01-31 22:51 ` [PATCH 08/12] perf, x86: Move NMI clearing to end of PMI handler after the counter registers are reset Andi Kleen
` (4 subsequent siblings)
11 siblings, 0 replies; 23+ messages in thread
From: Andi Kleen @ 2013-01-31 22:51 UTC (permalink / raw)
To: mingo
Cc: linux-kernel, a.p.zijlstra, akpm, acme, eranian, jolsa, namhyung,
Andi Kleen
From: Andi Kleen <ak@linux.intel.com>
With checkpointed counters there can be a situation where the counter
is overflowing, aborts the transaction, is set back to a non overflowing
checkpoint, causes interupt. The interrupt doesn't see the overflow
because it has been checkpointed. This is then a spurious PMI, typically with a
ugly NMI message. It can also lead to excessive aborts.
Avoid this problem by:
- Using the full counter width for counting counters (previous patch)
- Forbid sampling for checkpointed counters. It's not too useful anyways,
checkpointing is mainly for counting.
- On a PMI always set back checkpointed counters to zero.
v2: Add unlikely. Add comment
v3: Allow large sampling periods with CP for KVM
v4: Use event_is_checkpointed. Use EOPNOTSUPP. (Stephane Eranian)
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
arch/x86/kernel/cpu/perf_event_intel.c | 39 ++++++++++++++++++++++++++++++++
1 files changed, 39 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
index 9e11295..3d915e9 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -1072,6 +1072,11 @@ static void intel_pmu_enable_event(struct perf_event *event)
__x86_pmu_enable_event(hwc, ARCH_PERFMON_EVENTSEL_ENABLE);
}
+static inline bool event_is_checkpointed(struct perf_event *event)
+{
+ return (event->hw.config & HSW_INTX_CHECKPOINTED) != 0;
+}
+
/*
* Save and restart an expired event. Called by NMI contexts,
* so it has to be careful about preempting normal event ops:
@@ -1079,6 +1084,17 @@ static void intel_pmu_enable_event(struct perf_event *event)
int intel_pmu_save_and_restart(struct perf_event *event)
{
x86_perf_event_update(event);
+ /*
+ * For a checkpointed counter always reset back to 0. This
+ * avoids a situation where the counter overflows, aborts the
+ * transaction and is then set back to shortly before the
+ * overflow, and overflows and aborts again.
+ */
+ if (unlikely(event_is_checkpointed(event))) {
+ /* No race with NMIs because the counter should not be armed */
+ wrmsrl(event->hw.event_base, 0);
+ local64_set(&event->hw.prev_count, 0);
+ }
return x86_perf_event_set_period(event);
}
@@ -1162,6 +1178,15 @@ again:
x86_pmu.drain_pebs(regs);
}
+ /*
+ * To avoid spurious interrupts with perf stat always reset checkpointed
+ * counters.
+ *
+ * XXX move somewhere else.
+ */
+ if (cpuc->events[2] && event_is_checkpointed(cpuc->events[2]))
+ status |= (1ULL << 2);
+
for_each_set_bit(bit, (unsigned long *)&status, X86_PMC_IDX_MAX) {
struct perf_event *event = cpuc->events[bit];
@@ -1616,6 +1641,20 @@ static int hsw_hw_config(struct perf_event *event)
event->attr.precise_ip > 0))
return -EOPNOTSUPP;
+ if (event_is_checkpointed(event)) {
+ /*
+ * Sampling of checkpointed events can cause situations where
+ * the CPU constantly aborts because of a overflow, which is
+ * then checkpointed back and ignored. Forbid checkpointing
+ * for sampling.
+ *
+ * But still allow a long sampling period, so that perf stat
+ * from KVM works.
+ */
+ if (event->attr.sample_period > 0 &&
+ event->attr.sample_period < 0x7fffffff)
+ return -EOPNOTSUPP;
+ }
return 0;
}
--
1.7.7.6
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 08/12] perf, x86: Move NMI clearing to end of PMI handler after the counter registers are reset
2013-01-31 22:51 Basic perf PMU support for Haswell v2 Andi Kleen
` (6 preceding siblings ...)
2013-01-31 22:51 ` [PATCH 07/12] perf, x86: Avoid checkpointed counters causing excessive TSX aborts v4 Andi Kleen
@ 2013-01-31 22:51 ` Andi Kleen
2013-01-31 22:51 ` [PATCH 09/12] perf, x86: Disable LBR recording for unknown LBR_FMT Andi Kleen
` (3 subsequent siblings)
11 siblings, 0 replies; 23+ messages in thread
From: Andi Kleen @ 2013-01-31 22:51 UTC (permalink / raw)
To: mingo
Cc: linux-kernel, a.p.zijlstra, akpm, acme, eranian, jolsa, namhyung,
Andi Kleen
From: Andi Kleen <ak@linux.intel.com>
This avoids some problems with spurious PMIs on Haswell.
Haswell seems to behave more like P4 in this regard. Do
the same thing as the P4 perf handler by unmasking
the NMI only at the end. Shouldn't make any difference
for earlier non P4 cores.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
arch/x86/kernel/cpu/perf_event_intel.c | 15 +++++----------
1 files changed, 5 insertions(+), 10 deletions(-)
diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
index 3d915e9..2fe3673 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -1138,16 +1138,6 @@ static int intel_pmu_handle_irq(struct pt_regs *regs)
cpuc = &__get_cpu_var(cpu_hw_events);
- /*
- * Some chipsets need to unmask the LVTPC in a particular spot
- * inside the nmi handler. As a result, the unmasking was pushed
- * into all the nmi handlers.
- *
- * This handler doesn't seem to have any issues with the unmasking
- * so it was left at the top.
- */
- apic_write(APIC_LVTPC, APIC_DM_NMI);
-
intel_pmu_disable_all();
handled = intel_pmu_drain_bts_buffer();
status = intel_pmu_get_status();
@@ -1216,6 +1206,11 @@ again:
done:
intel_pmu_enable_all(0);
+ /*
+ * Only unmask the NMI after the overflow counters
+ * have been reset.
+ */
+ apic_write(APIC_LVTPC, APIC_DM_NMI);
return handled;
}
--
1.7.7.6
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 09/12] perf, x86: Disable LBR recording for unknown LBR_FMT
2013-01-31 22:51 Basic perf PMU support for Haswell v2 Andi Kleen
` (7 preceding siblings ...)
2013-01-31 22:51 ` [PATCH 08/12] perf, x86: Move NMI clearing to end of PMI handler after the counter registers are reset Andi Kleen
@ 2013-01-31 22:51 ` Andi Kleen
2013-01-31 22:51 ` [PATCH 10/12] perf, x86: Support LBR filtering by INTX/NOTX/ABORT v3 Andi Kleen
` (2 subsequent siblings)
11 siblings, 0 replies; 23+ messages in thread
From: Andi Kleen @ 2013-01-31 22:51 UTC (permalink / raw)
To: mingo
Cc: linux-kernel, a.p.zijlstra, akpm, acme, eranian, jolsa, namhyung,
Andi Kleen
From: Andi Kleen <ak@linux.intel.com>
When the LBR format is unknown disable LBR recording. This prevents
crashes when the LBR address is misdecoded and mis-sign extended.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
arch/x86/kernel/cpu/perf_event_intel_lbr.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kernel/cpu/perf_event_intel_lbr.c b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
index 2af6695b..ad5af13 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_lbr.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
@@ -13,6 +13,7 @@ enum {
LBR_FORMAT_EIP = 0x02,
LBR_FORMAT_EIP_FLAGS = 0x03,
LBR_FORMAT_EIP_FLAGS2 = 0x04,
+ LBR_FORMAT_MAX_KNOWN = LBR_FORMAT_EIP_FLAGS2,
};
/*
@@ -392,7 +393,7 @@ int intel_pmu_setup_lbr_filter(struct perf_event *event)
/*
* no LBR on this PMU
*/
- if (!x86_pmu.lbr_nr)
+ if (!x86_pmu.lbr_nr || x86_pmu.intel_cap.lbr_format > LBR_FORMAT_MAX_KNOWN)
return -EOPNOTSUPP;
/*
--
1.7.7.6
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 10/12] perf, x86: Support LBR filtering by INTX/NOTX/ABORT v3
2013-01-31 22:51 Basic perf PMU support for Haswell v2 Andi Kleen
` (8 preceding siblings ...)
2013-01-31 22:51 ` [PATCH 09/12] perf, x86: Disable LBR recording for unknown LBR_FMT Andi Kleen
@ 2013-01-31 22:51 ` Andi Kleen
2013-01-31 22:51 ` [PATCH 11/12] perf, tools: Support sorting by intx, abort branch flags v2 Andi Kleen
2013-01-31 22:51 ` [PATCH 12/12] perf, tools: Add abort_tx,no_tx,in_tx branch filter options to perf record -j v3 Andi Kleen
11 siblings, 0 replies; 23+ messages in thread
From: Andi Kleen @ 2013-01-31 22:51 UTC (permalink / raw)
To: mingo
Cc: linux-kernel, a.p.zijlstra, akpm, acme, eranian, jolsa, namhyung,
Andi Kleen
From: Andi Kleen <ak@linux.intel.com>
Add LBR filtering for branch in transaction, branch not in transaction
or transaction abort. This is exposed as new sample types.
v2: Rename ABORT to ABORTTX
v3: Use table instead of if
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
arch/x86/kernel/cpu/perf_event_intel_lbr.c | 58 ++++++++++++++++++++++------
include/uapi/linux/perf_event.h | 5 ++-
2 files changed, 50 insertions(+), 13 deletions(-)
diff --git a/arch/x86/kernel/cpu/perf_event_intel_lbr.c b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
index ad5af13..0be69fd 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_lbr.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
@@ -16,6 +16,14 @@ enum {
LBR_FORMAT_MAX_KNOWN = LBR_FORMAT_EIP_FLAGS2,
};
+static enum {
+ LBR_EIP_FLAGS = 1,
+ LBR_TSX = 2,
+} lbr_desc[LBR_FORMAT_MAX_KNOWN + 1] = {
+ [LBR_FORMAT_EIP_FLAGS] = LBR_EIP_FLAGS,
+ [LBR_FORMAT_EIP_FLAGS2] = LBR_EIP_FLAGS | LBR_TSX,
+};
+
/*
* Intel LBR_SELECT bits
* Intel Vol3a, April 2011, Section 16.7 Table 16-10
@@ -85,9 +93,13 @@ enum {
X86_BR_JMP = 1 << 9, /* jump */
X86_BR_IRQ = 1 << 10,/* hw interrupt or trap or fault */
X86_BR_IND_CALL = 1 << 11,/* indirect calls */
+ X86_BR_ABORT = 1 << 12,/* transaction abort */
+ X86_BR_INTX = 1 << 13,/* in transaction */
+ X86_BR_NOTX = 1 << 14,/* not in transaction */
};
#define X86_BR_PLM (X86_BR_USER | X86_BR_KERNEL)
+#define X86_BR_ANYTX (X86_BR_NOTX | X86_BR_INTX)
#define X86_BR_ANY \
(X86_BR_CALL |\
@@ -99,6 +111,7 @@ enum {
X86_BR_JCC |\
X86_BR_JMP |\
X86_BR_IRQ |\
+ X86_BR_ABORT |\
X86_BR_IND_CALL)
#define X86_BR_ALL (X86_BR_PLM | X86_BR_ANY)
@@ -275,22 +288,23 @@ static void intel_pmu_lbr_read_64(struct cpu_hw_events *cpuc)
for (i = 0; i < x86_pmu.lbr_nr; i++) {
unsigned long lbr_idx = (tos - i) & mask;
u64 from, to, mis = 0, pred = 0, intx = 0, abort = 0;
+ int skip = 0;
+ int lbr_flags = lbr_desc[lbr_format];
rdmsrl(x86_pmu.lbr_from + lbr_idx, from);
rdmsrl(x86_pmu.lbr_to + lbr_idx, to);
- if (lbr_format == LBR_FORMAT_EIP_FLAGS ||
- lbr_format == LBR_FORMAT_EIP_FLAGS2) {
+ if (lbr_flags & LBR_EIP_FLAGS) {
mis = !!(from & LBR_FROM_FLAG_MISPRED);
pred = !mis;
- if (lbr_format == LBR_FORMAT_EIP_FLAGS)
- from = (u64)((((s64)from) << 1) >> 1);
- else if (lbr_format == LBR_FORMAT_EIP_FLAGS2) {
- intx = !!(from & LBR_FROM_FLAG_INTX);
- abort = !!(from & LBR_FROM_FLAG_ABORT);
- from = (u64)((((s64)from) << 3) >> 3);
- }
+ skip = 1;
+ }
+ if (lbr_flags & LBR_TSX) {
+ intx = !!(from & LBR_FROM_FLAG_INTX);
+ abort = !!(from & LBR_FROM_FLAG_ABORT);
+ skip = 3;
}
+ from = (u64)((((s64)from) << skip) >> skip);
cpuc->lbr_entries[i].from = from;
cpuc->lbr_entries[i].to = to;
@@ -347,6 +361,16 @@ static void intel_pmu_setup_sw_lbr_filter(struct perf_event *event)
if (br_type & PERF_SAMPLE_BRANCH_IND_CALL)
mask |= X86_BR_IND_CALL;
+
+ if (br_type & PERF_SAMPLE_BRANCH_ABORTTX)
+ mask |= X86_BR_ABORT;
+
+ if (br_type & PERF_SAMPLE_BRANCH_INTX)
+ mask |= X86_BR_INTX;
+
+ if (br_type & PERF_SAMPLE_BRANCH_NOTX)
+ mask |= X86_BR_NOTX;
+
/*
* stash actual user request into reg, it may
* be used by fixup code for some CPU
@@ -393,7 +417,8 @@ int intel_pmu_setup_lbr_filter(struct perf_event *event)
/*
* no LBR on this PMU
*/
- if (!x86_pmu.lbr_nr || x86_pmu.intel_cap.lbr_format > LBR_FORMAT_MAX_KNOWN)
+ if (!x86_pmu.lbr_nr ||
+ x86_pmu.intel_cap.lbr_format > LBR_FORMAT_MAX_KNOWN)
return -EOPNOTSUPP;
/*
@@ -421,7 +446,7 @@ int intel_pmu_setup_lbr_filter(struct perf_event *event)
* decoded (e.g., text page not present), then X86_BR_NONE is
* returned.
*/
-static int branch_type(unsigned long from, unsigned long to)
+static int branch_type(unsigned long from, unsigned long to, int abort)
{
struct insn insn;
void *addr;
@@ -441,6 +466,9 @@ static int branch_type(unsigned long from, unsigned long to)
if (from == 0 || to == 0)
return X86_BR_NONE;
+ if (abort)
+ return X86_BR_ABORT | to_plm;
+
if (from_plm == X86_BR_USER) {
/*
* can happen if measuring at the user level only
@@ -577,7 +605,13 @@ intel_pmu_lbr_filter(struct cpu_hw_events *cpuc)
from = cpuc->lbr_entries[i].from;
to = cpuc->lbr_entries[i].to;
- type = branch_type(from, to);
+ type = branch_type(from, to, cpuc->lbr_entries[i].abort);
+ if (type != X86_BR_NONE && (br_sel & X86_BR_ANYTX)) {
+ if (cpuc->lbr_entries[i].intx)
+ type |= X86_BR_INTX;
+ else
+ type |= X86_BR_NOTX;
+ }
/* if type does not correspond, then discard */
if (type == X86_BR_NONE || (br_sel & type) != type) {
diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
index 9fa9c62..41b25f0 100644
--- a/include/uapi/linux/perf_event.h
+++ b/include/uapi/linux/perf_event.h
@@ -155,8 +155,11 @@ enum perf_branch_sample_type {
PERF_SAMPLE_BRANCH_ANY_CALL = 1U << 4, /* any call branch */
PERF_SAMPLE_BRANCH_ANY_RETURN = 1U << 5, /* any return branch */
PERF_SAMPLE_BRANCH_IND_CALL = 1U << 6, /* indirect calls */
+ PERF_SAMPLE_BRANCH_ABORTTX = 1U << 7, /* transaction aborts */
+ PERF_SAMPLE_BRANCH_INTX = 1U << 8, /* in transaction (flag) */
+ PERF_SAMPLE_BRANCH_NOTX = 1U << 9, /* not in transaction (flag) */
- PERF_SAMPLE_BRANCH_MAX = 1U << 7, /* non-ABI */
+ PERF_SAMPLE_BRANCH_MAX = 1U << 10, /* non-ABI */
};
#define PERF_SAMPLE_BRANCH_PLM_ALL \
--
1.7.7.6
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 11/12] perf, tools: Support sorting by intx, abort branch flags v2
2013-01-31 22:51 Basic perf PMU support for Haswell v2 Andi Kleen
` (9 preceding siblings ...)
2013-01-31 22:51 ` [PATCH 10/12] perf, x86: Support LBR filtering by INTX/NOTX/ABORT v3 Andi Kleen
@ 2013-01-31 22:51 ` Andi Kleen
2013-01-31 22:51 ` [PATCH 12/12] perf, tools: Add abort_tx,no_tx,in_tx branch filter options to perf record -j v3 Andi Kleen
11 siblings, 0 replies; 23+ messages in thread
From: Andi Kleen @ 2013-01-31 22:51 UTC (permalink / raw)
To: mingo
Cc: linux-kernel, a.p.zijlstra, akpm, acme, eranian, jolsa, namhyung,
Andi Kleen
From: Andi Kleen <ak@linux.intel.com>
Extend the perf branch sorting code to support sorting by intx
or abort qualifiers. Also print out those qualifiers.
This also fixes up some of the existing sort key documentation.
We do not support notx here, because it's simply not showing
the intx flag.
v2: Readd flags to man pages
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
tools/perf/Documentation/perf-report.txt | 4 ++-
tools/perf/Documentation/perf-top.txt | 4 ++-
tools/perf/builtin-report.c | 2 +-
tools/perf/builtin-top.c | 4 ++-
tools/perf/perf.h | 4 ++-
tools/perf/util/hist.h | 2 +
tools/perf/util/sort.c | 51 ++++++++++++++++++++++++++++++
tools/perf/util/sort.h | 2 +
8 files changed, 68 insertions(+), 5 deletions(-)
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index 848a0dc..eaf23ab 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -71,7 +71,7 @@ OPTIONS
entries are displayed as "[other]".
- cpu: cpu number the task ran at the time of sample
- srcline: filename and line number executed at the time of sample. The
- DWARF debuggin info must be provided.
+ DWARF debugging info must be provided.
By default, comm, dso and symbol keys are used.
(i.e. --sort comm,dso,symbol)
@@ -85,6 +85,8 @@ OPTIONS
- symbol_from: name of function branched from
- symbol_to: name of function branched to
- mispredict: "N" for predicted branch, "Y" for mispredicted branch
+ - intx: branch in TSX transaction
+ - abort: TSX transaction abort.
And default sort keys are changed to comm, dso_from, symbol_from, dso_to
and symbol_to, see '--branch-stack'.
diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt
index a414bc9..93970b7 100644
--- a/tools/perf/Documentation/perf-top.txt
+++ b/tools/perf/Documentation/perf-top.txt
@@ -112,7 +112,9 @@ Default is to monitor all CPUS.
-s::
--sort::
- Sort by key(s): pid, comm, dso, symbol, parent, srcline.
+ Sort by key(s): pid, comm, dso, symbol, parent, srcline,
+ dso_from, dso_to, symbol_to, symbol_from, mispredict,
+ abort, intx
-n::
--show-nr-samples::
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 47a8644..d51a66d 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -596,7 +596,7 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
"Use the stdio interface"),
OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
"sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline,"
- " dso_to, dso_from, symbol_to, symbol_from, mispredict"),
+ " dso_to, dso_from, symbol_to, symbol_from, mispredict, abort, intx"),
OPT_BOOLEAN(0, "showcpuutilization", &symbol_conf.show_cpu_utilization,
"Show sample percentage for different cpu modes"),
OPT_STRING('p', "parent", &parent_pattern, "regex",
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 7978c81..9e08cec 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1078,7 +1078,9 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
OPT_INCR('v', "verbose", &verbose,
"be more verbose (show counter open errors, etc)"),
OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
- "sort by key(s): pid, comm, dso, symbol, parent"),
+ "sort by key(s): pid, comm, dso, symbol, parent, dso_to,"
+ " dso_from, symbol_to, symbol_from, mispredict, srcline,"
+ " abort, intx"),
OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
"Show a column with the number of samples"),
OPT_CALLBACK_DEFAULT('G', "call-graph", &top.record_opts,
diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index 8f3bf38..eb049df 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -193,7 +193,9 @@ struct ip_callchain {
struct branch_flags {
u64 mispred:1;
u64 predicted:1;
- u64 reserved:62;
+ u64 intx:1;
+ u64 abort:1;
+ u64 reserved:60;
};
struct branch_entry {
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index 3862468..36a8565 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -44,6 +44,8 @@ enum hist_column {
HISTC_PARENT,
HISTC_CPU,
HISTC_MISPREDICT,
+ HISTC_INTX,
+ HISTC_ABORT,
HISTC_SYMBOL_FROM,
HISTC_SYMBOL_TO,
HISTC_DSO_FROM,
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index 7ad6239..b7a4100 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -472,6 +472,55 @@ struct sort_entry sort_mispredict = {
.se_width_idx = HISTC_MISPREDICT,
};
+static int64_t
+sort__abort_cmp(struct hist_entry *left, struct hist_entry *right)
+{
+ return left->branch_info->flags.abort !=
+ right->branch_info->flags.abort;
+}
+
+static int hist_entry__abort_snprintf(struct hist_entry *self, char *bf,
+ size_t size, unsigned int width)
+{
+ static const char *out = ".";
+
+ if (self->branch_info->flags.abort)
+ out = "A";
+ return repsep_snprintf(bf, size, "%-*s", width, out);
+}
+
+struct sort_entry sort_abort = {
+ .se_header = "Transaction abort",
+ .se_cmp = sort__abort_cmp,
+ .se_snprintf = hist_entry__abort_snprintf,
+ .se_width_idx = HISTC_ABORT,
+};
+
+static int64_t
+sort__intx_cmp(struct hist_entry *left, struct hist_entry *right)
+{
+ return left->branch_info->flags.intx !=
+ right->branch_info->flags.intx;
+}
+
+static int hist_entry__intx_snprintf(struct hist_entry *self, char *bf,
+ size_t size, unsigned int width)
+{
+ static const char *out = ".";
+
+ if (self->branch_info->flags.intx)
+ out = "T";
+
+ return repsep_snprintf(bf, size, "%-*s", width, out);
+}
+
+struct sort_entry sort_intx = {
+ .se_header = "Branch in transaction",
+ .se_cmp = sort__intx_cmp,
+ .se_snprintf = hist_entry__intx_snprintf,
+ .se_width_idx = HISTC_INTX,
+};
+
struct sort_dimension {
const char *name;
struct sort_entry *entry;
@@ -500,6 +549,8 @@ static struct sort_dimension bstack_sort_dimensions[] = {
DIM(SORT_SYM_FROM, "symbol_from", sort_sym_from),
DIM(SORT_SYM_TO, "symbol_to", sort_sym_to),
DIM(SORT_MISPREDICT, "mispredict", sort_mispredict),
+ DIM(SORT_ABORT, "abort", sort_abort),
+ DIM(SORT_INTX, "intx", sort_intx),
};
#undef DIM
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index e994ad3e..6755d28 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -138,6 +138,8 @@ enum sort_type {
SORT_SYM_FROM,
SORT_SYM_TO,
SORT_MISPREDICT,
+ SORT_ABORT,
+ SORT_INTX,
};
/*
--
1.7.7.6
^ permalink raw reply related [flat|nested] 23+ messages in thread
* [PATCH 12/12] perf, tools: Add abort_tx,no_tx,in_tx branch filter options to perf record -j v3
2013-01-31 22:51 Basic perf PMU support for Haswell v2 Andi Kleen
` (10 preceding siblings ...)
2013-01-31 22:51 ` [PATCH 11/12] perf, tools: Support sorting by intx, abort branch flags v2 Andi Kleen
@ 2013-01-31 22:51 ` Andi Kleen
11 siblings, 0 replies; 23+ messages in thread
From: Andi Kleen @ 2013-01-31 22:51 UTC (permalink / raw)
To: mingo
Cc: linux-kernel, a.p.zijlstra, akpm, acme, eranian, jolsa, namhyung,
Andi Kleen
From: Andi Kleen <ak@linux.intel.com>
Make perf record -j aware of the new in_tx,no_tx,abort_tx branch qualifiers.
v2: ABORT -> ABORTTX
v3: Add more _
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
tools/perf/Documentation/perf-record.txt | 3 +++
tools/perf/builtin-record.c | 3 +++
2 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
index 938e890..f7d74b2 100644
--- a/tools/perf/Documentation/perf-record.txt
+++ b/tools/perf/Documentation/perf-record.txt
@@ -172,6 +172,9 @@ following filters are defined:
- u: only when the branch target is at the user level
- k: only when the branch target is in the kernel
- hv: only when the target is at the hypervisor level
+ - in_tx: only when the target is in a hardware transaction
+ - no_tx: only when the target is not in a hardware transaction
+ - abort_tx: only when the target is a hardware transaction abort
+
The option requires at least one branch type among any, any_call, any_ret, ind_call.
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 2ac690c..4bcfccd 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -671,6 +671,9 @@ static const struct branch_mode branch_modes[] = {
BRANCH_OPT("any_call", PERF_SAMPLE_BRANCH_ANY_CALL),
BRANCH_OPT("any_ret", PERF_SAMPLE_BRANCH_ANY_RETURN),
BRANCH_OPT("ind_call", PERF_SAMPLE_BRANCH_IND_CALL),
+ BRANCH_OPT("abort_tx", PERF_SAMPLE_BRANCH_ABORTTX),
+ BRANCH_OPT("in_tx", PERF_SAMPLE_BRANCH_INTX),
+ BRANCH_OPT("no_tx", PERF_SAMPLE_BRANCH_NOTX),
BRANCH_END
};
--
1.7.7.6
^ permalink raw reply related [flat|nested] 23+ messages in thread
* Re: [PATCH 04/12] perf, x86: Support the TSX intx/intx_cp qualifiers v3
2013-01-31 22:51 ` [PATCH 04/12] perf, x86: Support the TSX intx/intx_cp qualifiers v3 Andi Kleen
@ 2013-02-01 10:16 ` Ingo Molnar
2013-02-01 15:03 ` Andi Kleen
0 siblings, 1 reply; 23+ messages in thread
From: Ingo Molnar @ 2013-02-01 10:16 UTC (permalink / raw)
To: Andi Kleen
Cc: linux-kernel, a.p.zijlstra, akpm, acme, eranian, jolsa, namhyung,
Andi Kleen
* Andi Kleen <andi@firstfloor.org> wrote:
> From: Andi Kleen <ak@linux.intel.com>
>
> Implement the TSX transaction and checkpointed transaction qualifiers for
> Haswell. This allows e.g. to profile the number of cycles in transactions.
>
> The checkpointed qualifier requires forcing the event to
> counter 2, implement this with a custom constraint for Haswell.
>
> Also add sysfs format attributes for intx/intx_cp
The series is getting smaller, but you still included this patch
I pointed out in my last review, which unnecessary increases the
size of the initial hw support series by adding Haswell-specific
transaction profiling features.
As requested before, please keep those in a completely separate
series so that minimal support can be merged upstream. This is
how we always did new hardware support in the past, in iterative
steps, and we are not going to make an exception for you.
I find it pretty counterproductive that you have ignored my
previous series structure request. Every unnecessary delay you
cause here delays upstream profiling support for Haswell CPUs.
Thanks,
Ingo
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [PATCH 04/12] perf, x86: Support the TSX intx/intx_cp qualifiers v3
2013-02-01 10:16 ` Ingo Molnar
@ 2013-02-01 15:03 ` Andi Kleen
2013-02-03 10:52 ` Ingo Molnar
0 siblings, 1 reply; 23+ messages in thread
From: Andi Kleen @ 2013-02-01 15:03 UTC (permalink / raw)
To: Ingo Molnar
Cc: Andi Kleen, linux-kernel, a.p.zijlstra, akpm, acme, eranian,
jolsa, namhyung, Andi Kleen
>
> As requested before, please keep those in a completely separate
> series so that minimal support can be merged upstream. This is
Hi Ingo, The goal is not to merge "minimal support" but full support.
All of these features have users. But I subsetted it to make reviewing easier.
I think the initial 10 patch series is reasonable as a first step,
quickly followed by the others. Can you handle it or not? Please be clear on that.
If you can't handle it I'll consider alternatives.
To be honest I find it hard to believe you really have trouble reviewing
those 10 straight forward patches (which have already reviewed by
others anyways). There's nothing particularly complicated or risky in
any of them, and you're a experienced kernel code reviewer.
-Andi
--
ak@linux.intel.com -- Speaking for myself only.
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [PATCH 01/12] perf, x86: Add PEBSv2 record support
2013-01-31 22:51 ` [PATCH 01/12] perf, x86: Add PEBSv2 record support Andi Kleen
@ 2013-02-01 17:18 ` Stephane Eranian
0 siblings, 0 replies; 23+ messages in thread
From: Stephane Eranian @ 2013-02-01 17:18 UTC (permalink / raw)
To: Andi Kleen
Cc: Ingo Molnar, LKML, Peter Zijlstra, Andrew Morton,
Arnaldo Carvalho de Melo, Jiri Olsa, Namhyung Kim, Andi Kleen
On Thu, Jan 31, 2013 at 11:51 PM, Andi Kleen <andi@firstfloor.org> wrote:
> From: Andi Kleen <ak@linux.intel.com>
>
> Add support for the v2 PEBS format. It has a superset of the v1 PEBS
> fields, but has a longer record so we need to adjust the code paths.
>
> The main advantage is the new "EventingRip" support which directly
> gives the instruction, not off-by-one instruction. So with precise == 2
> we use that directly and don't try to use LBRs and walking basic blocks.
> This lowers the overhead significantly.
>
> Some other features are added in later patches.
>
> Signed-off-by: Andi Kleen <ak@linux.intel.com>
Reviewed-by: Stephane Eranian <eranian@google.com>
> ---
> arch/x86/kernel/cpu/perf_event.c | 2 +-
> arch/x86/kernel/cpu/perf_event_intel_ds.c | 101 ++++++++++++++++++++++-------
> 2 files changed, 79 insertions(+), 24 deletions(-)
>
> diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
> index 6774c17..c95290a 100644
> --- a/arch/x86/kernel/cpu/perf_event.c
> +++ b/arch/x86/kernel/cpu/perf_event.c
> @@ -397,7 +397,7 @@ int x86_pmu_hw_config(struct perf_event *event)
> * check that PEBS LBR correction does not conflict with
> * whatever the user is asking with attr->branch_sample_type
> */
> - if (event->attr.precise_ip > 1) {
> + if (event->attr.precise_ip > 1 && x86_pmu.intel_cap.pebs_format < 2) {
> u64 *br_type = &event->attr.branch_sample_type;
>
> if (has_branch_stack(event)) {
> diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c
> index 826054a..9d0dae0 100644
> --- a/arch/x86/kernel/cpu/perf_event_intel_ds.c
> +++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c
> @@ -41,6 +41,12 @@ struct pebs_record_nhm {
> u64 status, dla, dse, lat;
> };
>
> +struct pebs_record_v2 {
> + struct pebs_record_nhm nhm;
> + u64 eventingrip;
> + u64 tsx_tuning;
> +};
> +
> void init_debug_store_on_cpu(int cpu)
> {
> struct debug_store *ds = per_cpu(cpu_hw_events, cpu).ds;
> @@ -559,8 +565,7 @@ static void __intel_pmu_pebs_event(struct perf_event *event,
> {
> /*
> * We cast to pebs_record_core since that is a subset of
> - * both formats and we don't use the other fields in this
> - * routine.
> + * both formats.
> */
> struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
> struct pebs_record_core *pebs = __pebs;
> @@ -588,7 +593,10 @@ static void __intel_pmu_pebs_event(struct perf_event *event,
> regs.bp = pebs->bp;
> regs.sp = pebs->sp;
>
> - if (event->attr.precise_ip > 1 && intel_pmu_pebs_fixup_ip(®s))
> + if (event->attr.precise_ip > 1 && x86_pmu.intel_cap.pebs_format >= 2) {
> + regs.ip = ((struct pebs_record_v2 *)pebs)->eventingrip;
> + regs.flags |= PERF_EFLAGS_EXACT;
> + } else if (event->attr.precise_ip > 1 && intel_pmu_pebs_fixup_ip(®s))
> regs.flags |= PERF_EFLAGS_EXACT;
> else
> regs.flags &= ~PERF_EFLAGS_EXACT;
> @@ -641,35 +649,21 @@ static void intel_pmu_drain_pebs_core(struct pt_regs *iregs)
> __intel_pmu_pebs_event(event, iregs, at);
> }
>
> -static void intel_pmu_drain_pebs_nhm(struct pt_regs *iregs)
> +static void intel_pmu_drain_pebs_common(struct pt_regs *iregs, void *at,
> + void *top)
> {
> struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
> struct debug_store *ds = cpuc->ds;
> - struct pebs_record_nhm *at, *top;
> struct perf_event *event = NULL;
> u64 status = 0;
> - int bit, n;
> -
> - if (!x86_pmu.pebs_active)
> - return;
> -
> - at = (struct pebs_record_nhm *)(unsigned long)ds->pebs_buffer_base;
> - top = (struct pebs_record_nhm *)(unsigned long)ds->pebs_index;
> + int bit;
>
> ds->pebs_index = ds->pebs_buffer_base;
>
> - n = top - at;
> - if (n <= 0)
> - return;
> + for ( ; at < top; at += x86_pmu.pebs_record_size) {
> + struct pebs_record_nhm *p = at;
>
> - /*
> - * Should not happen, we program the threshold at 1 and do not
> - * set a reset value.
> - */
> - WARN_ONCE(n > x86_pmu.max_pebs_events, "Unexpected number of pebs records %d\n", n);
> -
> - for ( ; at < top; at++) {
> - for_each_set_bit(bit, (unsigned long *)&at->status, x86_pmu.max_pebs_events) {
> + for_each_set_bit(bit, (unsigned long *)&p->status, x86_pmu.max_pebs_events) {
> event = cpuc->events[bit];
> if (!test_bit(bit, cpuc->active_mask))
> continue;
> @@ -692,6 +686,61 @@ static void intel_pmu_drain_pebs_nhm(struct pt_regs *iregs)
> }
> }
>
> +static void intel_pmu_drain_pebs_nhm(struct pt_regs *iregs)
> +{
> + struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
> + struct debug_store *ds = cpuc->ds;
> + struct pebs_record_nhm *at, *top;
> + int n;
> +
> + if (!x86_pmu.pebs_active)
> + return;
> +
> + at = (struct pebs_record_nhm *)(unsigned long)ds->pebs_buffer_base;
> + top = (struct pebs_record_nhm *)(unsigned long)ds->pebs_index;
> +
> + ds->pebs_index = ds->pebs_buffer_base;
> +
> + n = top - at;
> + if (n <= 0)
> + return;
> +
> + /*
> + * Should not happen, we program the threshold at 1 and do not
> + * set a reset value.
> + */
> + WARN_ONCE(n > x86_pmu.max_pebs_events,
> + "Unexpected number of pebs records %d\n", n);
> +
> + return intel_pmu_drain_pebs_common(iregs, at, top);
> +}
> +
> +static void intel_pmu_drain_pebs_v2(struct pt_regs *iregs)
> +{
> + struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
> + struct debug_store *ds = cpuc->ds;
> + struct pebs_record_v2 *at, *top;
> + int n;
> +
> + if (!x86_pmu.pebs_active)
> + return;
> +
> + at = (struct pebs_record_v2 *)(unsigned long)ds->pebs_buffer_base;
> + top = (struct pebs_record_v2 *)(unsigned long)ds->pebs_index;
> +
> + n = top - at;
> + if (n <= 0)
> + return;
> + /*
> + * Should not happen, we program the threshold at 1 and do not
> + * set a reset value.
> + */
> + WARN_ONCE(n > x86_pmu.max_pebs_events,
> + "Unexpected number of pebs records %d\n", n);
> +
> + return intel_pmu_drain_pebs_common(iregs, at, top);
> +}
> +
> /*
> * BTS, PEBS probe and setup
> */
> @@ -723,6 +772,12 @@ void intel_ds_init(void)
> x86_pmu.drain_pebs = intel_pmu_drain_pebs_nhm;
> break;
>
> + case 2:
> + printk(KERN_CONT "PEBS fmt2%c, ", pebs_type);
> + x86_pmu.pebs_record_size = sizeof(struct pebs_record_v2);
> + x86_pmu.drain_pebs = intel_pmu_drain_pebs_v2;
> + break;
> +
> default:
> printk(KERN_CONT "no PEBS fmt%d%c, ", format, pebs_type);
> x86_pmu.pebs = 0;
> --
> 1.7.7.6
>
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [PATCH 02/12] perf, x86: Basic Haswell PMU support v3
2013-01-31 22:51 ` [PATCH 02/12] perf, x86: Basic Haswell PMU support v3 Andi Kleen
@ 2013-02-01 17:22 ` Stephane Eranian
0 siblings, 0 replies; 23+ messages in thread
From: Stephane Eranian @ 2013-02-01 17:22 UTC (permalink / raw)
To: Andi Kleen
Cc: Ingo Molnar, LKML, Peter Zijlstra, Andrew Morton,
Arnaldo Carvalho de Melo, Jiri Olsa, Namhyung Kim, Andi Kleen
On Thu, Jan 31, 2013 at 11:51 PM, Andi Kleen <andi@firstfloor.org> wrote:
> From: Andi Kleen <ak@linux.intel.com>
>
> Add basic Haswell PMU support.
>
> Similar to SandyBridge, but has a few new events. Further
> differences are handled in followon patches.
>
> There are some new counter flags that need to be prevented
> from being set on fixed counters.
>
> Contains fixes from Stephane Eranian
>
> v2: Folded TSX bits into standard FIXED_EVENT_CONSTRAINTS
> v3: Use SNB LBR init code. Comment fix (Stephane Eranian)
> Signed-off-by: Andi Kleen <ak@linux.intel.com>
Looks ok to me, just minor typo in comment, no big deal.
Reviewed-by: Stephane Eranian <eranian@google.com>
> ---
> arch/x86/include/asm/perf_event.h | 3 +++
> arch/x86/kernel/cpu/perf_event.h | 5 ++++-
> arch/x86/kernel/cpu/perf_event_intel.c | 31 ++++++++++++++++++++++++++++++-
> 3 files changed, 37 insertions(+), 2 deletions(-)
>
> diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h
> index 4fabcdf..4003bb6 100644
> --- a/arch/x86/include/asm/perf_event.h
> +++ b/arch/x86/include/asm/perf_event.h
> @@ -29,6 +29,9 @@
> #define ARCH_PERFMON_EVENTSEL_INV (1ULL << 23)
> #define ARCH_PERFMON_EVENTSEL_CMASK 0xFF000000ULL
>
> +#define HSW_INTX (1ULL << 32)
> +#define HSW_INTX_CHECKPOINTED (1ULL << 33)
> +
> #define AMD_PERFMON_EVENTSEL_GUESTONLY (1ULL << 40)
> #define AMD_PERFMON_EVENTSEL_HOSTONLY (1ULL << 41)
>
> diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
> index 115c1ea..8941899 100644
> --- a/arch/x86/kernel/cpu/perf_event.h
> +++ b/arch/x86/kernel/cpu/perf_event.h
> @@ -219,11 +219,14 @@ struct cpu_hw_events {
> * - inv
> * - edge
> * - cnt-mask
> + * - intx
> + * - intx_cp
> * The other filters are supported by fixed counters.
> * The any-thread option is supported starting with v3.
> */
> +#define FIXED_EVENT_FLAGS (X86_RAW_EVENT_MASK|HSW_INTX|HSW_INTX_CHECKPOINTED)
> #define FIXED_EVENT_CONSTRAINT(c, n) \
> - EVENT_CONSTRAINT(c, (1ULL << (32+n)), X86_RAW_EVENT_MASK)
> + EVENT_CONSTRAINT(c, (1ULL << (32+n)), FIXED_EVENT_FLAGS)
>
> /*
> * Constraint on the Event code + UMask
> diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
> index 93b9e11..78045e5 100644
> --- a/arch/x86/kernel/cpu/perf_event_intel.c
> +++ b/arch/x86/kernel/cpu/perf_event_intel.c
> @@ -101,7 +101,7 @@ static struct event_constraint intel_snb_event_constraints[] __read_mostly =
> FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
> FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */
> FIXED_EVENT_CONSTRAINT(0x0300, 2), /* CPU_CLK_UNHALTED.REF */
> - INTEL_EVENT_CONSTRAINT(0x48, 0x4), /* L1D_PEND_MISS.PENDING */
> + INTEL_EVENT_CONSTRAINT(0x48, 0x4), /* L1D_PEND_MISS.* */
Minor tidbit: You fixed it for SNB but not HSW!
> INTEL_UEVENT_CONSTRAINT(0x01c0, 0x2), /* INST_RETIRED.PREC_DIST */
> INTEL_EVENT_CONSTRAINT(0xcd, 0x8), /* MEM_TRANS_RETIRED.LOAD_LATENCY */
> EVENT_CONSTRAINT_END
> @@ -133,6 +133,17 @@ static struct extra_reg intel_snb_extra_regs[] __read_mostly = {
> EVENT_EXTRA_END
> };
>
> +static struct event_constraint intel_hsw_event_constraints[] =
> +{
> + FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
> + FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */
> + FIXED_EVENT_CONSTRAINT(0x0300, 2), /* CPU_CLK_UNHALTED.REF */
> + INTEL_EVENT_CONSTRAINT(0x48, 0x4), /* L1D_PEND_MISS.PENDING */
That's where it needs to be fixed too.
> + INTEL_UEVENT_CONSTRAINT(0x01c0, 0x2), /* INST_RETIRED.PREC_DIST */
> + INTEL_EVENT_CONSTRAINT(0xcd, 0x8), /* MEM_TRANS_RETIRED.LOAD_LATENCY */
> + EVENT_CONSTRAINT_END
> +};
> +
> static u64 intel_pmu_event_map(int hw_event)
> {
> return intel_perfmon_event_map[hw_event];
> @@ -2107,6 +2118,24 @@ __init int intel_pmu_init(void)
> break;
>
>
> + case 60: /* Haswell Client */
> + case 70:
> + case 71:
> + memcpy(hw_cache_event_ids, snb_hw_cache_event_ids,
> + sizeof(hw_cache_event_ids));
> +
> + intel_pmu_lbr_init_snb();
> +
> + x86_pmu.event_constraints = intel_hsw_event_constraints;
> +
> + x86_pmu.extra_regs = intel_snb_extra_regs;
> + /* all extra regs are per-cpu when HT is on */
> + x86_pmu.er_flags |= ERF_HAS_RSP_1;
> + x86_pmu.er_flags |= ERF_NO_HT_SHARING;
> +
> + pr_cont("Haswell events, ");
> + break;
> +
> default:
> switch (x86_pmu.version) {
> case 1:
> --
> 1.7.7.6
>
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [PATCH 03/12] perf, x86: Basic Haswell PEBS support v4
2013-01-31 22:51 ` [PATCH 03/12] perf, x86: Basic Haswell PEBS support v4 Andi Kleen
@ 2013-02-01 17:26 ` Stephane Eranian
0 siblings, 0 replies; 23+ messages in thread
From: Stephane Eranian @ 2013-02-01 17:26 UTC (permalink / raw)
To: Andi Kleen
Cc: Ingo Molnar, LKML, Peter Zijlstra, Andrew Morton,
Arnaldo Carvalho de Melo, Jiri Olsa, Namhyung Kim, Andi Kleen
On Thu, Jan 31, 2013 at 11:51 PM, Andi Kleen <andi@firstfloor.org> wrote:
> From: Andi Kleen <ak@linux.intel.com>
>
> Add basic PEBS support for Haswell.
> The constraints are similar to SandyBridge with a few new events.
>
> v2: Readd missing pebs_aliases
> v3: Readd missing hunk. Fix some constraints.
> v4: Fix typo in PEBS event table (Stephane Eranian)
> Signed-off-by: Andi Kleen <ak@linux.intel.com>
Looks ok to me.
Reviewed-by: Stephane Eranian <eranian@google.com>
> ---
> arch/x86/kernel/cpu/perf_event.h | 2 ++
> arch/x86/kernel/cpu/perf_event_intel.c | 6 ++++--
> arch/x86/kernel/cpu/perf_event_intel_ds.c | 29 +++++++++++++++++++++++++++++
> 3 files changed, 35 insertions(+), 2 deletions(-)
>
> diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
> index 8941899..1567b0d 100644
> --- a/arch/x86/kernel/cpu/perf_event.h
> +++ b/arch/x86/kernel/cpu/perf_event.h
> @@ -596,6 +596,8 @@ extern struct event_constraint intel_snb_pebs_event_constraints[];
>
> extern struct event_constraint intel_ivb_pebs_event_constraints[];
>
> +extern struct event_constraint intel_hsw_pebs_event_constraints[];
> +
> struct event_constraint *intel_pebs_constraints(struct perf_event *event);
>
> void intel_pmu_pebs_enable(struct perf_event *event);
> diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
> index 78045e5..8163ebf 100644
> --- a/arch/x86/kernel/cpu/perf_event_intel.c
> +++ b/arch/x86/kernel/cpu/perf_event_intel.c
> @@ -826,7 +826,8 @@ static inline bool intel_pmu_needs_lbr_smpl(struct perf_event *event)
> return true;
>
> /* implicit branch sampling to correct PEBS skid */
> - if (x86_pmu.intel_cap.pebs_trap && event->attr.precise_ip > 1)
> + if (x86_pmu.intel_cap.pebs_trap && event->attr.precise_ip > 1 &&
> + x86_pmu.intel_cap.pebs_format < 2)
> return true;
>
> return false;
> @@ -2127,8 +2128,9 @@ __init int intel_pmu_init(void)
> intel_pmu_lbr_init_snb();
>
> x86_pmu.event_constraints = intel_hsw_event_constraints;
> -
> + x86_pmu.pebs_constraints = intel_hsw_pebs_event_constraints;
> x86_pmu.extra_regs = intel_snb_extra_regs;
> + x86_pmu.pebs_aliases = intel_pebs_aliases_snb;
> /* all extra regs are per-cpu when HT is on */
> x86_pmu.er_flags |= ERF_HAS_RSP_1;
> x86_pmu.er_flags |= ERF_NO_HT_SHARING;
> diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c
> index 9d0dae0..0252930 100644
> --- a/arch/x86/kernel/cpu/perf_event_intel_ds.c
> +++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c
> @@ -427,6 +427,35 @@ struct event_constraint intel_ivb_pebs_event_constraints[] = {
> EVENT_CONSTRAINT_END
> };
>
> +struct event_constraint intel_hsw_pebs_event_constraints[] = {
> + INTEL_UEVENT_CONSTRAINT(0x01c0, 0x2), /* INST_RETIRED.PRECDIST */
> + INTEL_UEVENT_CONSTRAINT(0x01c2, 0xf), /* UOPS_RETIRED.ALL */
> + INTEL_UEVENT_CONSTRAINT(0x02c2, 0xf), /* UOPS_RETIRED.RETIRE_SLOTS */
> + INTEL_EVENT_CONSTRAINT(0xc4, 0xf), /* BR_INST_RETIRED.* */
> + INTEL_UEVENT_CONSTRAINT(0x01c5, 0xf), /* BR_MISP_RETIRED.CONDITIONAL */
> + INTEL_UEVENT_CONSTRAINT(0x04c5, 0xf), /* BR_MISP_RETIRED.ALL_BRANCHES */
> + INTEL_UEVENT_CONSTRAINT(0x20c5, 0xf), /* BR_MISP_RETIRED.NEAR_TAKEN */
> + INTEL_EVENT_CONSTRAINT(0xcd, 0x8), /* MEM_TRANS_RETIRED.* */
> + INTEL_UEVENT_CONSTRAINT(0x11d0, 0xf), /* MEM_UOPS_RETIRED.STLB_MISS_LOADS */
> + INTEL_UEVENT_CONSTRAINT(0x12d0, 0xf), /* MEM_UOPS_RETIRED.STLB_MISS_STORES */
> + INTEL_UEVENT_CONSTRAINT(0x21d0, 0xf), /* MEM_UOPS_RETIRED.LOCK_LOADS */
> + INTEL_UEVENT_CONSTRAINT(0x41d0, 0xf), /* MEM_UOPS_RETIRED.SPLIT_LOADS */
> + INTEL_UEVENT_CONSTRAINT(0x42d0, 0xf), /* MEM_UOPS_RETIRED.SPLIT_STORES */
> + INTEL_UEVENT_CONSTRAINT(0x81d0, 0xf), /* MEM_UOPS_RETIRED.ALL_LOADS */
> + INTEL_UEVENT_CONSTRAINT(0x82d0, 0xf), /* MEM_UOPS_RETIRED.ALL_STORES */
> + INTEL_UEVENT_CONSTRAINT(0x01d1, 0xf), /* MEM_LOAD_UOPS_RETIRED.L1_HIT */
> + INTEL_UEVENT_CONSTRAINT(0x02d1, 0xf), /* MEM_LOAD_UOPS_RETIRED.L2_HIT */
> + INTEL_UEVENT_CONSTRAINT(0x04d1, 0xf), /* MEM_LOAD_UOPS_RETIRED.L3_HIT */
> + INTEL_UEVENT_CONSTRAINT(0x40d1, 0xf), /* MEM_LOAD_UOPS_RETIRED.HIT_LFB */
> + INTEL_UEVENT_CONSTRAINT(0x01d2, 0xf), /* MEM_LOAD_UOPS_LLC_HIT_RETIRED.XSNP_MISS */
> + INTEL_UEVENT_CONSTRAINT(0x02d2, 0xf), /* MEM_LOAD_UOPS_LLC_HIT_RETIRED.XSNP_HIT */
> + INTEL_UEVENT_CONSTRAINT(0x01d3, 0xf), /* MEM_LOAD_UOPS_LLC_MISS_RETIRED.LOCAL_DRAM */
> + INTEL_UEVENT_CONSTRAINT(0x04c8, 0xf), /* HLE_RETIRED.Abort */
> + INTEL_UEVENT_CONSTRAINT(0x04c9, 0xf), /* RTM_RETIRED.Abort */
> +
> + EVENT_CONSTRAINT_END
> +};
> +
> struct event_constraint *intel_pebs_constraints(struct perf_event *event)
> {
> struct event_constraint *c;
> --
> 1.7.7.6
>
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [PATCH 04/12] perf, x86: Support the TSX intx/intx_cp qualifiers v3
2013-02-01 15:03 ` Andi Kleen
@ 2013-02-03 10:52 ` Ingo Molnar
0 siblings, 0 replies; 23+ messages in thread
From: Ingo Molnar @ 2013-02-03 10:52 UTC (permalink / raw)
To: Andi Kleen
Cc: linux-kernel, a.p.zijlstra, akpm, acme, eranian, jolsa, namhyung,
Andi Kleen
* Andi Kleen <andi@firstfloor.org> wrote:
> > As requested before, please keep those in a completely
> > separate series so that minimal support can be merged
> > upstream. This is
>
> Hi Ingo, The goal is not to merge "minimal support" but full
> support.
Stop these idiotic excuses and stop the obstruction already!
Firstly, it is long standing kernel maintenance policy to first
go for supporting existing applications, ABIs, binaries.
The bulks of your other changes need changes to the ABI and
changes to tools - and won't be made use of by any of the
existing installed base of profiling tooling.
It is entirely reasonable and in fact required of me to separate
out and handle those in a second wave of changes, and this is
the fourth time you hinder Haswell support by not addressing
maintainer feedback.
Every other perf contributor understands those concepts.
Secondly, as it's being demonstrated in this discussion again,
you are a historically problematic contributor who often
produces avoidably crappy code that needs several iterations to
get right. You also have a track record of not willing to
improve and you have a track record of being needlessly
argumentative and disruptive. All in one, I currently cannot
trust your code and refuse to handle long, complex patch series
from you.
Thanks,
Ingo
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [PATCH 01/12] perf, x86: Add PEBSv2 record support
2013-01-25 22:00 ` [PATCH 01/12] perf, x86: Add PEBSv2 record support Andi Kleen
2013-01-28 13:15 ` Stephane Eranian
@ 2013-01-31 17:15 ` Stephane Eranian
1 sibling, 0 replies; 23+ messages in thread
From: Stephane Eranian @ 2013-01-31 17:15 UTC (permalink / raw)
To: Andi Kleen
Cc: Ingo Molnar, LKML, Peter Zijlstra, Andrew Morton,
Arnaldo Carvalho de Melo, Jiri Olsa, Namhyung Kim, Andi Kleen
On Fri, Jan 25, 2013 at 11:00 PM, Andi Kleen <andi@firstfloor.org> wrote:
> From: Andi Kleen <ak@linux.intel.com>
>
> Add support for the v2 PEBS format. It has a superset of the v1 PEBS
> fields, but has a longer record so we need to adjust the code paths.
>
> The main advantage is the new "EventingRip" support which directly
> gives the instruction, not off-by-one instruction. So with precise == 2
> we use that directly and don't try to use LBRs and walking basic blocks.
> This lowers the overhead significantly.
>
> Some other features are added in later patches.
>
> Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Stephane Eranian <eranian@google.com>
> ---
> arch/x86/kernel/cpu/perf_event.c | 2 +-
> arch/x86/kernel/cpu/perf_event_intel_ds.c | 101 ++++++++++++++++++++++-------
> 2 files changed, 79 insertions(+), 24 deletions(-)
>
> diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
> index 6774c17..c95290a 100644
> --- a/arch/x86/kernel/cpu/perf_event.c
> +++ b/arch/x86/kernel/cpu/perf_event.c
> @@ -397,7 +397,7 @@ int x86_pmu_hw_config(struct perf_event *event)
> * check that PEBS LBR correction does not conflict with
> * whatever the user is asking with attr->branch_sample_type
> */
> - if (event->attr.precise_ip > 1) {
> + if (event->attr.precise_ip > 1 && x86_pmu.intel_cap.pebs_format < 2) {
> u64 *br_type = &event->attr.branch_sample_type;
>
> if (has_branch_stack(event)) {
> diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c
> index 826054a..9d0dae0 100644
> --- a/arch/x86/kernel/cpu/perf_event_intel_ds.c
> +++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c
> @@ -41,6 +41,12 @@ struct pebs_record_nhm {
> u64 status, dla, dse, lat;
> };
>
> +struct pebs_record_v2 {
> + struct pebs_record_nhm nhm;
> + u64 eventingrip;
> + u64 tsx_tuning;
> +};
> +
> void init_debug_store_on_cpu(int cpu)
> {
> struct debug_store *ds = per_cpu(cpu_hw_events, cpu).ds;
> @@ -559,8 +565,7 @@ static void __intel_pmu_pebs_event(struct perf_event *event,
> {
> /*
> * We cast to pebs_record_core since that is a subset of
> - * both formats and we don't use the other fields in this
> - * routine.
> + * both formats.
> */
> struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
> struct pebs_record_core *pebs = __pebs;
> @@ -588,7 +593,10 @@ static void __intel_pmu_pebs_event(struct perf_event *event,
> regs.bp = pebs->bp;
> regs.sp = pebs->sp;
>
> - if (event->attr.precise_ip > 1 && intel_pmu_pebs_fixup_ip(®s))
> + if (event->attr.precise_ip > 1 && x86_pmu.intel_cap.pebs_format >= 2) {
> + regs.ip = ((struct pebs_record_v2 *)pebs)->eventingrip;
> + regs.flags |= PERF_EFLAGS_EXACT;
> + } else if (event->attr.precise_ip > 1 && intel_pmu_pebs_fixup_ip(®s))
> regs.flags |= PERF_EFLAGS_EXACT;
> else
> regs.flags &= ~PERF_EFLAGS_EXACT;
> @@ -641,35 +649,21 @@ static void intel_pmu_drain_pebs_core(struct pt_regs *iregs)
> __intel_pmu_pebs_event(event, iregs, at);
> }
>
> -static void intel_pmu_drain_pebs_nhm(struct pt_regs *iregs)
> +static void intel_pmu_drain_pebs_common(struct pt_regs *iregs, void *at,
> + void *top)
> {
> struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
> struct debug_store *ds = cpuc->ds;
> - struct pebs_record_nhm *at, *top;
> struct perf_event *event = NULL;
> u64 status = 0;
> - int bit, n;
> -
> - if (!x86_pmu.pebs_active)
> - return;
> -
> - at = (struct pebs_record_nhm *)(unsigned long)ds->pebs_buffer_base;
> - top = (struct pebs_record_nhm *)(unsigned long)ds->pebs_index;
> + int bit;
>
> ds->pebs_index = ds->pebs_buffer_base;
>
> - n = top - at;
> - if (n <= 0)
> - return;
> + for ( ; at < top; at += x86_pmu.pebs_record_size) {
> + struct pebs_record_nhm *p = at;
>
> - /*
> - * Should not happen, we program the threshold at 1 and do not
> - * set a reset value.
> - */
> - WARN_ONCE(n > x86_pmu.max_pebs_events, "Unexpected number of pebs records %d\n", n);
> -
> - for ( ; at < top; at++) {
> - for_each_set_bit(bit, (unsigned long *)&at->status, x86_pmu.max_pebs_events) {
> + for_each_set_bit(bit, (unsigned long *)&p->status, x86_pmu.max_pebs_events) {
> event = cpuc->events[bit];
> if (!test_bit(bit, cpuc->active_mask))
> continue;
> @@ -692,6 +686,61 @@ static void intel_pmu_drain_pebs_nhm(struct pt_regs *iregs)
> }
> }
>
> +static void intel_pmu_drain_pebs_nhm(struct pt_regs *iregs)
> +{
> + struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
> + struct debug_store *ds = cpuc->ds;
> + struct pebs_record_nhm *at, *top;
> + int n;
> +
> + if (!x86_pmu.pebs_active)
> + return;
> +
> + at = (struct pebs_record_nhm *)(unsigned long)ds->pebs_buffer_base;
> + top = (struct pebs_record_nhm *)(unsigned long)ds->pebs_index;
> +
> + ds->pebs_index = ds->pebs_buffer_base;
> +
> + n = top - at;
> + if (n <= 0)
> + return;
> +
> + /*
> + * Should not happen, we program the threshold at 1 and do not
> + * set a reset value.
> + */
> + WARN_ONCE(n > x86_pmu.max_pebs_events,
> + "Unexpected number of pebs records %d\n", n);
> +
> + return intel_pmu_drain_pebs_common(iregs, at, top);
> +}
> +
> +static void intel_pmu_drain_pebs_v2(struct pt_regs *iregs)
> +{
> + struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
> + struct debug_store *ds = cpuc->ds;
> + struct pebs_record_v2 *at, *top;
> + int n;
> +
> + if (!x86_pmu.pebs_active)
> + return;
> +
> + at = (struct pebs_record_v2 *)(unsigned long)ds->pebs_buffer_base;
> + top = (struct pebs_record_v2 *)(unsigned long)ds->pebs_index;
> +
> + n = top - at;
> + if (n <= 0)
> + return;
> + /*
> + * Should not happen, we program the threshold at 1 and do not
> + * set a reset value.
> + */
> + WARN_ONCE(n > x86_pmu.max_pebs_events,
> + "Unexpected number of pebs records %d\n", n);
> +
> + return intel_pmu_drain_pebs_common(iregs, at, top);
> +}
> +
> /*
> * BTS, PEBS probe and setup
> */
> @@ -723,6 +772,12 @@ void intel_ds_init(void)
> x86_pmu.drain_pebs = intel_pmu_drain_pebs_nhm;
> break;
>
> + case 2:
> + printk(KERN_CONT "PEBS fmt2%c, ", pebs_type);
> + x86_pmu.pebs_record_size = sizeof(struct pebs_record_v2);
> + x86_pmu.drain_pebs = intel_pmu_drain_pebs_v2;
> + break;
> +
> default:
> printk(KERN_CONT "no PEBS fmt%d%c, ", format, pebs_type);
> x86_pmu.pebs = 0;
> --
> 1.7.7.6
>
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [PATCH 01/12] perf, x86: Add PEBSv2 record support
2013-01-28 13:15 ` Stephane Eranian
@ 2013-01-28 16:10 ` Andi Kleen
0 siblings, 0 replies; 23+ messages in thread
From: Andi Kleen @ 2013-01-28 16:10 UTC (permalink / raw)
To: Stephane Eranian
Cc: Andi Kleen, Ingo Molnar, LKML, Peter Zijlstra, Andrew Morton,
Arnaldo Carvalho de Melo, Jiri Olsa, Namhyung Kim, Andi Kleen
> I think you should call this: PEBS v3 and not v2.
v2 is the version number in the enumeration register.
It would be confusing to use a different numbering than Intel does.
That's also the numbering that is printed in dmesg.
> We already have 2 existing formats: core and nhm.
> You're adding the hsw format.
>
> So either you add it as struct pebs_record_hsw or you
> cleanup the naming of all the structs and call them:
core is v0.
>
> struct pebs_record_v1 /* core */
> struct pebs_record_v2 /* nhm, snb, ivb */
> struct pebs_record_v3 /* hsw */
>
> That would seem more consistent to me.
I personally don't see a lot of need for a rename, but I can send
a followon patch to rename nhm to v1 and core to v0. I will do that
separately because people are already complaining that the patchkit
is too big, and it doesn't really affect the functionality.
-Andi
^ permalink raw reply [flat|nested] 23+ messages in thread
* Re: [PATCH 01/12] perf, x86: Add PEBSv2 record support
2013-01-25 22:00 ` [PATCH 01/12] perf, x86: Add PEBSv2 record support Andi Kleen
@ 2013-01-28 13:15 ` Stephane Eranian
2013-01-28 16:10 ` Andi Kleen
2013-01-31 17:15 ` Stephane Eranian
1 sibling, 1 reply; 23+ messages in thread
From: Stephane Eranian @ 2013-01-28 13:15 UTC (permalink / raw)
To: Andi Kleen
Cc: Ingo Molnar, LKML, Peter Zijlstra, Andrew Morton,
Arnaldo Carvalho de Melo, Jiri Olsa, Namhyung Kim, Andi Kleen
On Fri, Jan 25, 2013 at 11:00 PM, Andi Kleen <andi@firstfloor.org> wrote:
> From: Andi Kleen <ak@linux.intel.com>
>
> Add support for the v2 PEBS format. It has a superset of the v1 PEBS
> fields, but has a longer record so we need to adjust the code paths.
>
> The main advantage is the new "EventingRip" support which directly
> gives the instruction, not off-by-one instruction. So with precise == 2
> we use that directly and don't try to use LBRs and walking basic blocks.
> This lowers the overhead significantly.
>
> Some other features are added in later patches.
>
I think you should call this: PEBS v3 and not v2.
We already have 2 existing formats: core and nhm.
You're adding the hsw format.
So either you add it as struct pebs_record_hsw or you
cleanup the naming of all the structs and call them:
struct pebs_record_v1 /* core */
struct pebs_record_v2 /* nhm, snb, ivb */
struct pebs_record_v3 /* hsw */
That would seem more consistent to me.
As for using precise=2 for eventingrip, I am fine with this.
> Signed-off-by: Andi Kleen <ak@linux.intel.com>
> ---
> arch/x86/kernel/cpu/perf_event.c | 2 +-
> arch/x86/kernel/cpu/perf_event_intel_ds.c | 101 ++++++++++++++++++++++-------
> 2 files changed, 79 insertions(+), 24 deletions(-)
>
> diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
> index 6774c17..c95290a 100644
> --- a/arch/x86/kernel/cpu/perf_event.c
> +++ b/arch/x86/kernel/cpu/perf_event.c
> @@ -397,7 +397,7 @@ int x86_pmu_hw_config(struct perf_event *event)
> * check that PEBS LBR correction does not conflict with
> * whatever the user is asking with attr->branch_sample_type
> */
> - if (event->attr.precise_ip > 1) {
> + if (event->attr.precise_ip > 1 && x86_pmu.intel_cap.pebs_format < 2) {
> u64 *br_type = &event->attr.branch_sample_type;
>
> if (has_branch_stack(event)) {
> diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c
> index 826054a..9d0dae0 100644
> --- a/arch/x86/kernel/cpu/perf_event_intel_ds.c
> +++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c
> @@ -41,6 +41,12 @@ struct pebs_record_nhm {
> u64 status, dla, dse, lat;
> };
>
> +struct pebs_record_v2 {
> + struct pebs_record_nhm nhm;
> + u64 eventingrip;
> + u64 tsx_tuning;
> +};
> +
> void init_debug_store_on_cpu(int cpu)
> {
> struct debug_store *ds = per_cpu(cpu_hw_events, cpu).ds;
> @@ -559,8 +565,7 @@ static void __intel_pmu_pebs_event(struct perf_event *event,
> {
> /*
> * We cast to pebs_record_core since that is a subset of
> - * both formats and we don't use the other fields in this
> - * routine.
> + * both formats.
> */
> struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
> struct pebs_record_core *pebs = __pebs;
> @@ -588,7 +593,10 @@ static void __intel_pmu_pebs_event(struct perf_event *event,
> regs.bp = pebs->bp;
> regs.sp = pebs->sp;
>
> - if (event->attr.precise_ip > 1 && intel_pmu_pebs_fixup_ip(®s))
> + if (event->attr.precise_ip > 1 && x86_pmu.intel_cap.pebs_format >= 2) {
> + regs.ip = ((struct pebs_record_v2 *)pebs)->eventingrip;
> + regs.flags |= PERF_EFLAGS_EXACT;
> + } else if (event->attr.precise_ip > 1 && intel_pmu_pebs_fixup_ip(®s))
> regs.flags |= PERF_EFLAGS_EXACT;
> else
> regs.flags &= ~PERF_EFLAGS_EXACT;
> @@ -641,35 +649,21 @@ static void intel_pmu_drain_pebs_core(struct pt_regs *iregs)
> __intel_pmu_pebs_event(event, iregs, at);
> }
>
> -static void intel_pmu_drain_pebs_nhm(struct pt_regs *iregs)
> +static void intel_pmu_drain_pebs_common(struct pt_regs *iregs, void *at,
> + void *top)
> {
> struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
> struct debug_store *ds = cpuc->ds;
> - struct pebs_record_nhm *at, *top;
> struct perf_event *event = NULL;
> u64 status = 0;
> - int bit, n;
> -
> - if (!x86_pmu.pebs_active)
> - return;
> -
> - at = (struct pebs_record_nhm *)(unsigned long)ds->pebs_buffer_base;
> - top = (struct pebs_record_nhm *)(unsigned long)ds->pebs_index;
> + int bit;
>
> ds->pebs_index = ds->pebs_buffer_base;
>
> - n = top - at;
> - if (n <= 0)
> - return;
> + for ( ; at < top; at += x86_pmu.pebs_record_size) {
> + struct pebs_record_nhm *p = at;
>
> - /*
> - * Should not happen, we program the threshold at 1 and do not
> - * set a reset value.
> - */
> - WARN_ONCE(n > x86_pmu.max_pebs_events, "Unexpected number of pebs records %d\n", n);
> -
> - for ( ; at < top; at++) {
> - for_each_set_bit(bit, (unsigned long *)&at->status, x86_pmu.max_pebs_events) {
> + for_each_set_bit(bit, (unsigned long *)&p->status, x86_pmu.max_pebs_events) {
> event = cpuc->events[bit];
> if (!test_bit(bit, cpuc->active_mask))
> continue;
> @@ -692,6 +686,61 @@ static void intel_pmu_drain_pebs_nhm(struct pt_regs *iregs)
> }
> }
>
> +static void intel_pmu_drain_pebs_nhm(struct pt_regs *iregs)
> +{
> + struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
> + struct debug_store *ds = cpuc->ds;
> + struct pebs_record_nhm *at, *top;
> + int n;
> +
> + if (!x86_pmu.pebs_active)
> + return;
> +
> + at = (struct pebs_record_nhm *)(unsigned long)ds->pebs_buffer_base;
> + top = (struct pebs_record_nhm *)(unsigned long)ds->pebs_index;
> +
> + ds->pebs_index = ds->pebs_buffer_base;
> +
> + n = top - at;
> + if (n <= 0)
> + return;
> +
> + /*
> + * Should not happen, we program the threshold at 1 and do not
> + * set a reset value.
> + */
> + WARN_ONCE(n > x86_pmu.max_pebs_events,
> + "Unexpected number of pebs records %d\n", n);
> +
> + return intel_pmu_drain_pebs_common(iregs, at, top);
> +}
> +
> +static void intel_pmu_drain_pebs_v2(struct pt_regs *iregs)
> +{
> + struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
> + struct debug_store *ds = cpuc->ds;
> + struct pebs_record_v2 *at, *top;
> + int n;
> +
> + if (!x86_pmu.pebs_active)
> + return;
> +
> + at = (struct pebs_record_v2 *)(unsigned long)ds->pebs_buffer_base;
> + top = (struct pebs_record_v2 *)(unsigned long)ds->pebs_index;
> +
> + n = top - at;
> + if (n <= 0)
> + return;
> + /*
> + * Should not happen, we program the threshold at 1 and do not
> + * set a reset value.
> + */
> + WARN_ONCE(n > x86_pmu.max_pebs_events,
> + "Unexpected number of pebs records %d\n", n);
> +
> + return intel_pmu_drain_pebs_common(iregs, at, top);
> +}
> +
> /*
> * BTS, PEBS probe and setup
> */
> @@ -723,6 +772,12 @@ void intel_ds_init(void)
> x86_pmu.drain_pebs = intel_pmu_drain_pebs_nhm;
> break;
>
> + case 2:
> + printk(KERN_CONT "PEBS fmt2%c, ", pebs_type);
> + x86_pmu.pebs_record_size = sizeof(struct pebs_record_v2);
> + x86_pmu.drain_pebs = intel_pmu_drain_pebs_v2;
> + break;
> +
> default:
> printk(KERN_CONT "no PEBS fmt%d%c, ", format, pebs_type);
> x86_pmu.pebs = 0;
> --
> 1.7.7.6
>
^ permalink raw reply [flat|nested] 23+ messages in thread
* [PATCH 01/12] perf, x86: Add PEBSv2 record support
2013-01-25 22:00 Basic perf PMU support for Haswell v1 Andi Kleen
@ 2013-01-25 22:00 ` Andi Kleen
2013-01-28 13:15 ` Stephane Eranian
2013-01-31 17:15 ` Stephane Eranian
0 siblings, 2 replies; 23+ messages in thread
From: Andi Kleen @ 2013-01-25 22:00 UTC (permalink / raw)
To: mingo
Cc: linux-kernel, a.p.zijlstra, akpm, acme, eranian, jolsa, namhyung,
Andi Kleen
From: Andi Kleen <ak@linux.intel.com>
Add support for the v2 PEBS format. It has a superset of the v1 PEBS
fields, but has a longer record so we need to adjust the code paths.
The main advantage is the new "EventingRip" support which directly
gives the instruction, not off-by-one instruction. So with precise == 2
we use that directly and don't try to use LBRs and walking basic blocks.
This lowers the overhead significantly.
Some other features are added in later patches.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
arch/x86/kernel/cpu/perf_event.c | 2 +-
arch/x86/kernel/cpu/perf_event_intel_ds.c | 101 ++++++++++++++++++++++-------
2 files changed, 79 insertions(+), 24 deletions(-)
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index 6774c17..c95290a 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -397,7 +397,7 @@ int x86_pmu_hw_config(struct perf_event *event)
* check that PEBS LBR correction does not conflict with
* whatever the user is asking with attr->branch_sample_type
*/
- if (event->attr.precise_ip > 1) {
+ if (event->attr.precise_ip > 1 && x86_pmu.intel_cap.pebs_format < 2) {
u64 *br_type = &event->attr.branch_sample_type;
if (has_branch_stack(event)) {
diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c
index 826054a..9d0dae0 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_ds.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c
@@ -41,6 +41,12 @@ struct pebs_record_nhm {
u64 status, dla, dse, lat;
};
+struct pebs_record_v2 {
+ struct pebs_record_nhm nhm;
+ u64 eventingrip;
+ u64 tsx_tuning;
+};
+
void init_debug_store_on_cpu(int cpu)
{
struct debug_store *ds = per_cpu(cpu_hw_events, cpu).ds;
@@ -559,8 +565,7 @@ static void __intel_pmu_pebs_event(struct perf_event *event,
{
/*
* We cast to pebs_record_core since that is a subset of
- * both formats and we don't use the other fields in this
- * routine.
+ * both formats.
*/
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
struct pebs_record_core *pebs = __pebs;
@@ -588,7 +593,10 @@ static void __intel_pmu_pebs_event(struct perf_event *event,
regs.bp = pebs->bp;
regs.sp = pebs->sp;
- if (event->attr.precise_ip > 1 && intel_pmu_pebs_fixup_ip(®s))
+ if (event->attr.precise_ip > 1 && x86_pmu.intel_cap.pebs_format >= 2) {
+ regs.ip = ((struct pebs_record_v2 *)pebs)->eventingrip;
+ regs.flags |= PERF_EFLAGS_EXACT;
+ } else if (event->attr.precise_ip > 1 && intel_pmu_pebs_fixup_ip(®s))
regs.flags |= PERF_EFLAGS_EXACT;
else
regs.flags &= ~PERF_EFLAGS_EXACT;
@@ -641,35 +649,21 @@ static void intel_pmu_drain_pebs_core(struct pt_regs *iregs)
__intel_pmu_pebs_event(event, iregs, at);
}
-static void intel_pmu_drain_pebs_nhm(struct pt_regs *iregs)
+static void intel_pmu_drain_pebs_common(struct pt_regs *iregs, void *at,
+ void *top)
{
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
struct debug_store *ds = cpuc->ds;
- struct pebs_record_nhm *at, *top;
struct perf_event *event = NULL;
u64 status = 0;
- int bit, n;
-
- if (!x86_pmu.pebs_active)
- return;
-
- at = (struct pebs_record_nhm *)(unsigned long)ds->pebs_buffer_base;
- top = (struct pebs_record_nhm *)(unsigned long)ds->pebs_index;
+ int bit;
ds->pebs_index = ds->pebs_buffer_base;
- n = top - at;
- if (n <= 0)
- return;
+ for ( ; at < top; at += x86_pmu.pebs_record_size) {
+ struct pebs_record_nhm *p = at;
- /*
- * Should not happen, we program the threshold at 1 and do not
- * set a reset value.
- */
- WARN_ONCE(n > x86_pmu.max_pebs_events, "Unexpected number of pebs records %d\n", n);
-
- for ( ; at < top; at++) {
- for_each_set_bit(bit, (unsigned long *)&at->status, x86_pmu.max_pebs_events) {
+ for_each_set_bit(bit, (unsigned long *)&p->status, x86_pmu.max_pebs_events) {
event = cpuc->events[bit];
if (!test_bit(bit, cpuc->active_mask))
continue;
@@ -692,6 +686,61 @@ static void intel_pmu_drain_pebs_nhm(struct pt_regs *iregs)
}
}
+static void intel_pmu_drain_pebs_nhm(struct pt_regs *iregs)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+ struct debug_store *ds = cpuc->ds;
+ struct pebs_record_nhm *at, *top;
+ int n;
+
+ if (!x86_pmu.pebs_active)
+ return;
+
+ at = (struct pebs_record_nhm *)(unsigned long)ds->pebs_buffer_base;
+ top = (struct pebs_record_nhm *)(unsigned long)ds->pebs_index;
+
+ ds->pebs_index = ds->pebs_buffer_base;
+
+ n = top - at;
+ if (n <= 0)
+ return;
+
+ /*
+ * Should not happen, we program the threshold at 1 and do not
+ * set a reset value.
+ */
+ WARN_ONCE(n > x86_pmu.max_pebs_events,
+ "Unexpected number of pebs records %d\n", n);
+
+ return intel_pmu_drain_pebs_common(iregs, at, top);
+}
+
+static void intel_pmu_drain_pebs_v2(struct pt_regs *iregs)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+ struct debug_store *ds = cpuc->ds;
+ struct pebs_record_v2 *at, *top;
+ int n;
+
+ if (!x86_pmu.pebs_active)
+ return;
+
+ at = (struct pebs_record_v2 *)(unsigned long)ds->pebs_buffer_base;
+ top = (struct pebs_record_v2 *)(unsigned long)ds->pebs_index;
+
+ n = top - at;
+ if (n <= 0)
+ return;
+ /*
+ * Should not happen, we program the threshold at 1 and do not
+ * set a reset value.
+ */
+ WARN_ONCE(n > x86_pmu.max_pebs_events,
+ "Unexpected number of pebs records %d\n", n);
+
+ return intel_pmu_drain_pebs_common(iregs, at, top);
+}
+
/*
* BTS, PEBS probe and setup
*/
@@ -723,6 +772,12 @@ void intel_ds_init(void)
x86_pmu.drain_pebs = intel_pmu_drain_pebs_nhm;
break;
+ case 2:
+ printk(KERN_CONT "PEBS fmt2%c, ", pebs_type);
+ x86_pmu.pebs_record_size = sizeof(struct pebs_record_v2);
+ x86_pmu.drain_pebs = intel_pmu_drain_pebs_v2;
+ break;
+
default:
printk(KERN_CONT "no PEBS fmt%d%c, ", format, pebs_type);
x86_pmu.pebs = 0;
--
1.7.7.6
^ permalink raw reply related [flat|nested] 23+ messages in thread
end of thread, other threads:[~2013-02-03 10:52 UTC | newest]
Thread overview: 23+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2013-01-31 22:51 Basic perf PMU support for Haswell v2 Andi Kleen
2013-01-31 22:51 ` [PATCH 01/12] perf, x86: Add PEBSv2 record support Andi Kleen
2013-02-01 17:18 ` Stephane Eranian
2013-01-31 22:51 ` [PATCH 02/12] perf, x86: Basic Haswell PMU support v3 Andi Kleen
2013-02-01 17:22 ` Stephane Eranian
2013-01-31 22:51 ` [PATCH 03/12] perf, x86: Basic Haswell PEBS support v4 Andi Kleen
2013-02-01 17:26 ` Stephane Eranian
2013-01-31 22:51 ` [PATCH 04/12] perf, x86: Support the TSX intx/intx_cp qualifiers v3 Andi Kleen
2013-02-01 10:16 ` Ingo Molnar
2013-02-01 15:03 ` Andi Kleen
2013-02-03 10:52 ` Ingo Molnar
2013-01-31 22:51 ` [PATCH 05/12] perf, x86: Support Haswell v4 LBR format Andi Kleen
2013-01-31 22:51 ` [PATCH 06/12] perf, x86: Support full width counting Andi Kleen
2013-01-31 22:51 ` [PATCH 07/12] perf, x86: Avoid checkpointed counters causing excessive TSX aborts v4 Andi Kleen
2013-01-31 22:51 ` [PATCH 08/12] perf, x86: Move NMI clearing to end of PMI handler after the counter registers are reset Andi Kleen
2013-01-31 22:51 ` [PATCH 09/12] perf, x86: Disable LBR recording for unknown LBR_FMT Andi Kleen
2013-01-31 22:51 ` [PATCH 10/12] perf, x86: Support LBR filtering by INTX/NOTX/ABORT v3 Andi Kleen
2013-01-31 22:51 ` [PATCH 11/12] perf, tools: Support sorting by intx, abort branch flags v2 Andi Kleen
2013-01-31 22:51 ` [PATCH 12/12] perf, tools: Add abort_tx,no_tx,in_tx branch filter options to perf record -j v3 Andi Kleen
-- strict thread matches above, loose matches on Subject: below --
2013-01-25 22:00 Basic perf PMU support for Haswell v1 Andi Kleen
2013-01-25 22:00 ` [PATCH 01/12] perf, x86: Add PEBSv2 record support Andi Kleen
2013-01-28 13:15 ` Stephane Eranian
2013-01-28 16:10 ` Andi Kleen
2013-01-31 17:15 ` Stephane Eranian
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