From: "tip-bot2 for Kan Liang" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: Kan Liang <kan.liang@linux.intel.com>,
Andi Kleen <ak@linux.intel.com>, Jiri Olsa <jolsa@redhat.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Alexey Budankov <alexey.budankov@linux.intel.com>,
Mathieu Poirier <mathieu.poirier@linaro.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Namhyung Kim <namhyung@kernel.org>,
Pavel Gerasimov <pavel.gerasimov@intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Ravi Bangoria <ravi.bangoria@linux.ibm.com>,
Stephane Eranian <eranian@google.com>,
Vitaly Slobodskoy <vitaly.slobodskoy@intel.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>, x86 <x86@kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: [tip: perf/core] perf machine: Factor out lbr_callchain_add_lbr_ip()
Date: Wed, 22 Apr 2020 12:17:14 -0000 [thread overview]
Message-ID: <158755783407.28353.15360366037839486817.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20200319202517.23423-9-kan.liang@linux.intel.com>
The following commit has been merged into the perf/core branch of tip:
Commit-ID: e2b23483eb1d851b4c48935a995f79b2de41c3ed
Gitweb: https://git.kernel.org/tip/e2b23483eb1d851b4c48935a995f79b2de41c3ed
Author: Kan Liang <kan.liang@linux.intel.com>
AuthorDate: Thu, 19 Mar 2020 13:25:08 -07:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Sat, 18 Apr 2020 09:05:01 -03:00
perf machine: Factor out lbr_callchain_add_lbr_ip()
Both caller and callee needs to add ip from LBR to callchain.
Factor out lbr_callchain_add_lbr_ip() to improve code readability.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Pavel Gerasimov <pavel.gerasimov@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com>
Link: http://lore.kernel.org/lkml/20200319202517.23423-9-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/machine.c | 143 ++++++++++++++++++-------------------
1 file changed, 73 insertions(+), 70 deletions(-)
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index a7f75fd..f9d69fc 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -2224,6 +2224,74 @@ static int lbr_callchain_add_kernel_ip(struct thread *thread,
return 0;
}
+static int lbr_callchain_add_lbr_ip(struct thread *thread,
+ struct callchain_cursor *cursor,
+ struct perf_sample *sample,
+ struct symbol **parent,
+ struct addr_location *root_al,
+ u64 *branch_from,
+ bool callee)
+{
+ struct branch_stack *lbr_stack = sample->branch_stack;
+ struct branch_entry *entries = perf_sample__branch_entries(sample);
+ u8 cpumode = PERF_RECORD_MISC_USER;
+ int lbr_nr = lbr_stack->nr;
+ struct branch_flags *flags;
+ int err, i;
+ u64 ip;
+
+ if (callee) {
+ /* Add LBR ip from first entries.to */
+ ip = entries[0].to;
+ flags = &entries[0].flags;
+ *branch_from = entries[0].from;
+ err = add_callchain_ip(thread, cursor, parent,
+ root_al, &cpumode, ip,
+ true, flags, NULL,
+ *branch_from);
+ if (err)
+ return err;
+
+ /* Add LBR ip from entries.from one by one. */
+ for (i = 0; i < lbr_nr; i++) {
+ ip = entries[i].from;
+ flags = &entries[i].flags;
+ err = add_callchain_ip(thread, cursor, parent,
+ root_al, &cpumode, ip,
+ true, flags, NULL,
+ *branch_from);
+ if (err)
+ return err;
+ }
+ return 0;
+ }
+
+ /* Add LBR ip from entries.from one by one. */
+ for (i = lbr_nr - 1; i >= 0; i--) {
+ ip = entries[i].from;
+ flags = &entries[i].flags;
+ err = add_callchain_ip(thread, cursor, parent,
+ root_al, &cpumode, ip,
+ true, flags, NULL,
+ *branch_from);
+ if (err)
+ return err;
+ }
+
+ /* Add LBR ip from first entries.to */
+ ip = entries[0].to;
+ flags = &entries[0].flags;
+ *branch_from = entries[0].from;
+ err = add_callchain_ip(thread, cursor, parent,
+ root_al, &cpumode, ip,
+ true, flags, NULL,
+ *branch_from);
+ if (err)
+ return err;
+
+ return 0;
+}
+
/*
* Recolve LBR callstack chain sample
* Return:
@@ -2240,14 +2308,7 @@ static int resolve_lbr_callchain_sample(struct thread *thread,
{
struct ip_callchain *chain = sample->callchain;
int chain_nr = min(max_stack, (int)chain->nr), i;
- u8 cpumode = PERF_RECORD_MISC_USER;
- u64 ip, branch_from = 0;
- struct branch_stack *lbr_stack;
- struct branch_entry *entries;
- int lbr_nr, j, k;
- bool branch;
- struct branch_flags *flags;
- int mix_chain_nr;
+ u64 branch_from = 0;
int err;
for (i = 0; i < chain_nr; i++) {
@@ -2259,21 +2320,6 @@ static int resolve_lbr_callchain_sample(struct thread *thread,
if (i == chain_nr)
return 0;
- lbr_stack = sample->branch_stack;
- entries = perf_sample__branch_entries(sample);
- lbr_nr = lbr_stack->nr;
- /*
- * LBR callstack can only get user call chain.
- * The mix_chain_nr is kernel call chain
- * number plus LBR user call chain number.
- * i is kernel call chain number,
- * 1 is PERF_CONTEXT_USER,
- * lbr_nr + 1 is the user call chain number.
- * For details, please refer to the comments
- * in callchain__printf
- */
- mix_chain_nr = i + 1 + lbr_nr + 1;
-
if (callchain_param.order == ORDER_CALLEE) {
/* Add kernel ip */
err = lbr_callchain_add_kernel_ip(thread, cursor, sample,
@@ -2282,57 +2328,14 @@ static int resolve_lbr_callchain_sample(struct thread *thread,
if (err)
goto error;
- /* Add LBR ip from first entries.to */
- ip = entries[0].to;
- branch = true;
- flags = &entries[0].flags;
- branch_from = entries[0].from;
- err = add_callchain_ip(thread, cursor, parent,
- root_al, &cpumode, ip,
- branch, flags, NULL,
- branch_from);
+ err = lbr_callchain_add_lbr_ip(thread, cursor, sample, parent,
+ root_al, &branch_from, true);
if (err)
goto error;
- /* Add LBR ip from entries.from one by one. */
- for (j = i + 2; j < mix_chain_nr; j++) {
- k = j - i - 2;
- ip = entries[k].from;
- branch = true;
- flags = &entries[k].flags;
-
- err = add_callchain_ip(thread, cursor, parent,
- root_al, &cpumode, ip,
- branch, flags, NULL,
- branch_from);
- if (err)
- goto error;
- }
} else {
- /* Add LBR ip from entries.from one by one. */
- for (j = 0; j < lbr_nr; j++) {
- k = lbr_nr - j - 1;
- ip = entries[k].from;
- branch = true;
- flags = &entries[k].flags;
-
- err = add_callchain_ip(thread, cursor, parent,
- root_al, &cpumode, ip,
- branch, flags, NULL,
- branch_from);
- if (err)
- goto error;
- }
-
- /* Add LBR ip from first entries.to */
- ip = entries[0].to;
- branch = true;
- flags = &entries[0].flags;
- branch_from = entries[0].from;
- err = add_callchain_ip(thread, cursor, parent,
- root_al, &cpumode, ip,
- branch, flags, NULL,
- branch_from);
+ err = lbr_callchain_add_lbr_ip(thread, cursor, sample, parent,
+ root_al, &branch_from, false);
if (err)
goto error;
next prev parent reply other threads:[~2020-04-22 12:22 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-19 20:25 [PATCH V4 00/17] Stitch LBR call stack (Perf Tools) kan.liang
2020-03-19 20:25 ` [PATCH V4 01/17] perf pmu: Add support for PMU capabilities kan.liang
2020-04-22 12:17 ` [tip: perf/core] " tip-bot2 for Kan Liang
2020-03-19 20:25 ` [PATCH V4 02/17] perf header: Support CPU " kan.liang
2020-04-22 12:17 ` [tip: perf/core] " tip-bot2 for Kan Liang
2020-03-19 20:25 ` [PATCH V4 03/17] perf record: Clear HEADER_CPU_PMU_CAPS for non LBR call stack mode kan.liang
2020-04-17 14:42 ` Arnaldo Carvalho de Melo
2020-03-19 20:25 ` [PATCH V4 04/17] perf stat: Clear HEADER_CPU_PMU_CAPS kan.liang
2020-04-17 14:42 ` Arnaldo Carvalho de Melo
2020-03-19 20:25 ` [PATCH V4 05/17] perf machine: Remove the indent in resolve_lbr_callchain_sample kan.liang
2020-04-22 12:17 ` [tip: perf/core] " tip-bot2 for Kan Liang
2020-03-19 20:25 ` [PATCH V4 06/17] perf machine: Refine the function for LBR call stack reconstruction kan.liang
2020-04-22 12:17 ` [tip: perf/core] " tip-bot2 for Kan Liang
2020-03-19 20:25 ` [PATCH V4 07/17] perf machine: Factor out lbr_callchain_add_kernel_ip() kan.liang
2020-04-22 12:17 ` [tip: perf/core] " tip-bot2 for Kan Liang
2020-03-19 20:25 ` [PATCH V4 08/17] perf machine: Factor out lbr_callchain_add_lbr_ip() kan.liang
2020-04-22 12:17 ` tip-bot2 for Kan Liang [this message]
2020-03-19 20:25 ` [PATCH V4 09/17] perf thread: Add a knob for LBR stitch approach kan.liang
2020-04-22 12:17 ` [tip: perf/core] " tip-bot2 for Kan Liang
2020-03-19 20:25 ` [PATCH V4 10/17] perf tools: Save previous sample for LBR stitching approach kan.liang
2020-04-17 15:02 ` Arnaldo Carvalho de Melo
2020-04-22 12:17 ` [tip: perf/core] perf thread: " tip-bot2 for Kan Liang
2020-03-19 20:25 ` [PATCH V4 11/17] perf tools: Save previous cursor nodes " kan.liang
2020-04-17 16:53 ` Arnaldo Carvalho de Melo
2020-04-22 12:17 ` [tip: perf/core] perf callchain: " tip-bot2 for Kan Liang
2020-03-19 20:25 ` [PATCH V4 12/17] perf tools: Stitch LBR call stack kan.liang
2020-04-22 12:17 ` [tip: perf/core] perf callchain: " tip-bot2 for Kan Liang
2020-03-19 20:25 ` [PATCH V4 13/17] perf report: Add option to enable the LBR stitching approach kan.liang
2020-04-22 12:17 ` [tip: perf/core] " tip-bot2 for Kan Liang
2020-03-19 20:25 ` [PATCH V4 14/17] perf script: " kan.liang
2020-04-22 12:17 ` [tip: perf/core] " tip-bot2 for Kan Liang
2020-03-19 20:25 ` [PATCH V4 15/17] perf top: " kan.liang
2020-04-22 12:17 ` [tip: perf/core] " tip-bot2 for Kan Liang
2020-03-19 20:25 ` [PATCH V4 16/17] perf c2c: " kan.liang
2020-04-22 12:17 ` [tip: perf/core] " tip-bot2 for Kan Liang
2020-03-19 20:25 ` [PATCH V4 17/17] perf hist: Add fast path for duplicate entries check kan.liang
2020-04-22 12:17 ` [tip: perf/core] " tip-bot2 for Kan Liang
2020-03-23 11:13 ` [PATCH V4 00/17] Stitch LBR call stack (Perf Tools) Jiri Olsa
2020-04-02 15:34 ` Liang, Kan
2020-04-02 16:00 ` Arnaldo Carvalho de Melo
2020-04-02 17:02 ` Liang, Kan
2020-04-17 17:48 ` Arnaldo Carvalho de Melo
2020-04-17 21:47 ` Liang, Kan
2020-04-17 21:54 ` Arnaldo Carvalho de Melo
2020-04-17 21:55 ` Arnaldo Carvalho de Melo
2020-04-17 21:55 ` Arnaldo Carvalho de Melo
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