From: Anshuman Khandual <anshuman.khandual@arm.com>
To: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
peterz@infradead.org, alexander.shishkin@linux.intel.com,
jolsa@redhat.com, acme@kernel.org
Cc: Anshuman Khandual <anshuman.khandual@arm.com>,
Robin Murphy <robin.murphy@arm.com>,
Suzuki Poulose <suzuki.poulose@arm.com>,
James Clark <james.clark@arm.com>, Ingo Molnar <mingo@redhat.com>,
Mark Rutland <mark.rutland@arm.com>,
Namhyung Kim <namhyung@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH V6 6/8] perf/tools: Extend branch type classification
Date: Fri, 10 Jun 2022 09:20:59 +0530 [thread overview]
Message-ID: <20220610035101.424112-7-anshuman.khandual@arm.com> (raw)
In-Reply-To: <20220610035101.424112-1-anshuman.khandual@arm.com>
This updates the perf tool with generic branch type classification with new
ABI extender place holder i.e PERF_BR_EXTEND_ABI, the new 4 bit branch type
field i.e perf_branch_entry.new_type, new generic page fault related branch
types and some arch specific branch types as added earlier in the kernel.
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-perf-users@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
tools/include/uapi/linux/perf_event.h | 16 ++++++++-
tools/perf/builtin-script.c | 2 +-
tools/perf/util/branch.c | 52 ++++++++++++++++++++++++++-
tools/perf/util/branch.h | 6 +++-
tools/perf/util/session.c | 2 +-
5 files changed, 73 insertions(+), 5 deletions(-)
diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h
index 26d8f0b5ac0d..d29280adc3c4 100644
--- a/tools/include/uapi/linux/perf_event.h
+++ b/tools/include/uapi/linux/perf_event.h
@@ -255,9 +255,22 @@ enum {
PERF_BR_IRQ = 12, /* irq */
PERF_BR_SERROR = 13, /* system error */
PERF_BR_NO_TX = 14, /* not in transaction */
+ PERF_BR_EXTEND_ABI = 15, /* extend ABI */
PERF_BR_MAX,
};
+enum {
+ PERF_BR_NEW_FAULT_ALGN = 0, /* Alignment fault */
+ PERF_BR_NEW_FAULT_DATA = 1, /* Data fault */
+ PERF_BR_NEW_FAULT_INST = 2, /* Inst fault */
+ PERF_BR_NEW_ARCH_1 = 3, /* Architecture specific */
+ PERF_BR_NEW_ARCH_2 = 4, /* Architecture specific */
+ PERF_BR_NEW_ARCH_3 = 5, /* Architecture specific */
+ PERF_BR_NEW_ARCH_4 = 6, /* Architecture specific */
+ PERF_BR_NEW_ARCH_5 = 7, /* Architecture specific */
+ PERF_BR_NEW_MAX,
+};
+
#define PERF_SAMPLE_BRANCH_PLM_ALL \
(PERF_SAMPLE_BRANCH_USER|\
PERF_SAMPLE_BRANCH_KERNEL|\
@@ -1372,7 +1385,8 @@ struct perf_branch_entry {
abort:1, /* transaction abort */
cycles:16, /* cycle count to last branch */
type:4, /* branch type */
- reserved:40;
+ new_type:4, /* additional branch type */
+ reserved:36;
};
union perf_sample_weight {
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index c689054002cc..d4d581230f23 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -866,7 +866,7 @@ static int print_bstack_flags(FILE *fp, struct branch_entry *br)
br->flags.in_tx ? 'X' : '-',
br->flags.abort ? 'A' : '-',
br->flags.cycles,
- br->flags.type ? branch_type_name(br->flags.type) : "-");
+ get_branch_type(br));
}
static int perf_sample__fprintf_brstack(struct perf_sample *sample,
diff --git a/tools/perf/util/branch.c b/tools/perf/util/branch.c
index abc673347bee..6d962b0a4532 100644
--- a/tools/perf/util/branch.c
+++ b/tools/perf/util/branch.c
@@ -21,7 +21,10 @@ void branch_type_count(struct branch_type_stat *st, struct branch_flags *flags,
if (flags->type == PERF_BR_UNKNOWN || from == 0)
return;
- st->counts[flags->type]++;
+ if (flags->type == PERF_BR_EXTEND_ABI)
+ st->new_counts[flags->new_type]++;
+ else
+ st->counts[flags->type]++;
if (flags->type == PERF_BR_COND) {
if (to > from)
@@ -36,6 +39,25 @@ void branch_type_count(struct branch_type_stat *st, struct branch_flags *flags,
st->cross_4k++;
}
+const char *branch_new_type_name(int new_type)
+{
+ const char *branch_new_names[PERF_BR_NEW_MAX] = {
+ "FAULT_ALGN",
+ "FAULT_DATA",
+ "FAULT_INST",
+ "ARCH_1",
+ "ARCH_2",
+ "ARCH_3",
+ "ARCH_4",
+ "ARCH_5"
+ };
+
+ if (new_type >= 0 && new_type < PERF_BR_NEW_MAX)
+ return branch_new_names[new_type];
+
+ return NULL;
+}
+
const char *branch_type_name(int type)
{
const char *branch_names[PERF_BR_MAX] = {
@@ -62,6 +84,17 @@ const char *branch_type_name(int type)
return NULL;
}
+const char *get_branch_type(struct branch_entry *e)
+{
+ if (e->flags.type == PERF_BR_UNKNOWN)
+ return "";
+
+ if (e->flags.type == PERF_BR_EXTEND_ABI)
+ return branch_new_type_name(e->flags.new_type);
+
+ return branch_type_name(e->flags.type);
+}
+
void branch_type_stat_display(FILE *fp, struct branch_type_stat *st)
{
u64 total = 0;
@@ -108,6 +141,15 @@ void branch_type_stat_display(FILE *fp, struct branch_type_stat *st)
100.0 *
(double)st->counts[i] / (double)total);
}
+
+ for (i = 0; i < PERF_BR_NEW_MAX; i++) {
+ if (st->new_counts[i] > 0)
+ fprintf(fp, "\n%8s: %5.1f%%",
+ branch_new_type_name(i),
+ 100.0 *
+ (double)st->new_counts[i] / (double)total);
+ }
+
}
static int count_str_scnprintf(int idx, const char *str, char *bf, int size)
@@ -123,6 +165,9 @@ int branch_type_str(struct branch_type_stat *st, char *bf, int size)
for (i = 0; i < PERF_BR_MAX; i++)
total += st->counts[i];
+ for (i = 0; i < PERF_BR_NEW_MAX; i++)
+ total += st->new_counts[i];
+
if (total == 0)
return 0;
@@ -140,6 +185,11 @@ int branch_type_str(struct branch_type_stat *st, char *bf, int size)
printed += count_str_scnprintf(j++, branch_type_name(i), bf + printed, size - printed);
}
+ for (i = 0; i < PERF_BR_NEW_MAX; i++) {
+ if (st->new_counts[i] > 0)
+ printed += count_str_scnprintf(j++, branch_new_type_name(i), bf + printed, size - printed);
+ }
+
if (st->cross_4k > 0)
printed += count_str_scnprintf(j++, "CROSS_4K", bf + printed, size - printed);
diff --git a/tools/perf/util/branch.h b/tools/perf/util/branch.h
index 17b2ccc61094..8d251b35428a 100644
--- a/tools/perf/util/branch.h
+++ b/tools/perf/util/branch.h
@@ -24,7 +24,8 @@ struct branch_flags {
u64 abort:1;
u64 cycles:16;
u64 type:4;
- u64 reserved:40;
+ u64 new_type:4;
+ u64 reserved:36;
};
};
};
@@ -72,6 +73,7 @@ static inline struct branch_entry *perf_sample__branch_entries(struct perf_sampl
struct branch_type_stat {
bool branch_to;
u64 counts[PERF_BR_MAX];
+ u64 new_counts[PERF_BR_NEW_MAX];
u64 cond_fwd;
u64 cond_bwd;
u64 cross_4k;
@@ -82,6 +84,8 @@ void branch_type_count(struct branch_type_stat *st, struct branch_flags *flags,
u64 from, u64 to);
const char *branch_type_name(int type);
+const char *branch_new_type_name(int new_type);
+const char *get_branch_type(struct branch_entry *e);
void branch_type_stat_display(FILE *fp, struct branch_type_stat *st);
int branch_type_str(struct branch_type_stat *st, char *bf, int bfsize);
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 0aa818977d2b..136fa03364ab 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1178,7 +1178,7 @@ static void branch_stack__printf(struct perf_sample *sample, bool callstack)
e->flags.abort ? "A" : " ",
e->flags.in_tx ? "T" : " ",
(unsigned)e->flags.reserved,
- e->flags.type ? branch_type_name(e->flags.type) : "");
+ get_branch_type(e));
} else {
if (i == 0) {
printf("..... %2"PRIu64": %016" PRIx64 "\n"
--
2.25.1
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next prev parent reply other threads:[~2022-06-10 3:54 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-10 3:50 [PATCH V6 0/8] perf: Expand perf_branch_entry Anshuman Khandual
2022-06-10 3:50 ` [PATCH V6 1/8] perf: Add system error and not in transaction branch types Anshuman Khandual
2022-06-10 3:50 ` [PATCH V6 2/8] perf: Extend branch type classification Anshuman Khandual
2022-06-10 3:50 ` [PATCH V6 3/8] perf: Capture branch privilege information Anshuman Khandual
2022-06-10 3:50 ` [PATCH V6 4/8] perf: Add PERF_BR_NEW_ARCH_[N] map for BRBE on arm64 platform Anshuman Khandual
2022-06-10 3:50 ` [PATCH V6 5/8] perf/tools: Add system error and not in transaction branch types Anshuman Khandual
2022-06-10 3:50 ` Anshuman Khandual [this message]
2022-06-14 16:53 ` [PATCH V6 6/8] perf/tools: Extend branch type classification German Gomez
2022-06-15 3:21 ` Anshuman Khandual
2022-06-15 13:39 ` German Gomez
2022-06-10 3:51 ` [PATCH V6 7/8] perf/tools: Add branch privilege information request flag Anshuman Khandual
2022-06-10 3:51 ` [PATCH V6 8/8] perf/tools: Add PERF_BR_NEW_ARCH_[N] map for BRBE on arm64 platform Anshuman Khandual
2022-06-13 9:06 ` [PATCH V6 0/8] perf: Expand perf_branch_entry Anshuman Khandual
2022-06-29 4:44 ` Anshuman Khandual
2022-07-13 5:40 ` Anshuman Khandual
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