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Date: Wed, 22 Apr 2020 12:17:23 -0000
From: "tip-bot2 for Adrian Hunter" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Adrian Hunter <adrian.hunter@...el.com>,
Andi Kleen <ak@...ux.intel.com>, Jiri Olsa <jolsa@...hat.com>,
Arnaldo Carvalho de Melo <acme@...hat.com>,
x86 <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>
Subject: [tip: perf/core] perf auxtrace: Add an option to synthesize
callchains for regular events
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 1c5c25b3fdbd7035f6d53a1a99b5afd577ce13e1
Gitweb: https://git.kernel.org/tip/1c5c25b3fdbd7035f6d53a1a99b5afd577ce13e1
Author: Adrian Hunter <adrian.hunter@...el.com>
AuthorDate: Wed, 01 Apr 2020 13:16:05 +03:00
Committer: Arnaldo Carvalho de Melo <acme@...hat.com>
CommitterDate: Thu, 16 Apr 2020 12:19:15 -03:00
perf auxtrace: Add an option to synthesize callchains for regular events
Currently, callchains can be synthesized only for synthesized events. Add
an itrace option to synthesize callchains for regular events.
Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Link: http://lore.kernel.org/lkml/20200401101613.6201-9-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
tools/perf/Documentation/itrace.txt | 1 +
tools/perf/builtin-report.c | 3 ++-
tools/perf/builtin-script.c | 2 +-
tools/perf/util/auxtrace.c | 6 +++++-
tools/perf/util/auxtrace.h | 2 ++
tools/perf/util/s390-cpumsf.c | 2 +-
6 files changed, 12 insertions(+), 4 deletions(-)
diff --git a/tools/perf/Documentation/itrace.txt b/tools/perf/Documentation/itrace.txt
index 82ff7da..671e154 100644
--- a/tools/perf/Documentation/itrace.txt
+++ b/tools/perf/Documentation/itrace.txt
@@ -10,6 +10,7 @@
e synthesize error events
d create a debug log
g synthesize a call chain (use with i or x)
+ G synthesize a call chain on existing event records
l synthesize last branch entries (use with i or x)
s skip initial number of events
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 26d8fc2..c0cebd5 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -339,6 +339,7 @@ static int report__setup_sample_type(struct report *rep)
bool is_pipe = perf_data__is_pipe(session->data);
if (session->itrace_synth_opts->callchain ||
+ session->itrace_synth_opts->add_callchain ||
(!is_pipe &&
perf_header__has_feat(&session->header, HEADER_AUXTRACE) &&
!session->itrace_synth_opts->set))
@@ -1332,7 +1333,7 @@ int cmd_report(int argc, const char **argv)
if (symbol_conf.cumulate_callchain && !callchain_param.order_set)
callchain_param.order = ORDER_CALLER;
- if (itrace_synth_opts.callchain &&
+ if ((itrace_synth_opts.callchain || itrace_synth_opts.add_callchain) &&
(int)itrace_synth_opts.callchain_sz > report.max_stack)
report.max_stack = itrace_synth_opts.callchain_sz;
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 8bf3ba2..06b511c 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -3537,7 +3537,7 @@ int cmd_script(int argc, const char **argv)
return -1;
}
- if (itrace_synth_opts.callchain &&
+ if ((itrace_synth_opts.callchain || itrace_synth_opts.add_callchain) &&
itrace_synth_opts.callchain_sz > scripting_max_stack)
scripting_max_stack = itrace_synth_opts.callchain_sz;
diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c
index b60bae8..809a09e 100644
--- a/tools/perf/util/auxtrace.c
+++ b/tools/perf/util/auxtrace.c
@@ -1462,8 +1462,12 @@ int itrace_parse_synth_opts(const struct option *opt, const char *str,
synth_opts->branches = true;
synth_opts->returns = true;
break;
+ case 'G':
case 'g':
- synth_opts->callchain = true;
+ if (p[-1] == 'G')
+ synth_opts->add_callchain = true;
+ else
+ synth_opts->callchain = true;
synth_opts->callchain_sz =
PERF_ITRACE_DEFAULT_CALLCHAIN_SZ;
while (*p == ' ' || *p == ',')
diff --git a/tools/perf/util/auxtrace.h b/tools/perf/util/auxtrace.h
index db65aae..dd8a4ff 100644
--- a/tools/perf/util/auxtrace.h
+++ b/tools/perf/util/auxtrace.h
@@ -74,6 +74,7 @@ enum itrace_period_type {
* @calls: limit branch samples to calls (can be combined with @returns)
* @returns: limit branch samples to returns (can be combined with @calls)
* @callchain: add callchain to 'instructions' events
+ * @add_callchain: add callchain to existing event records
* @thread_stack: feed branches to the thread_stack
* @last_branch: add branch context to 'instruction' events
* @callchain_sz: maximum callchain size
@@ -101,6 +102,7 @@ struct itrace_synth_opts {
bool calls;
bool returns;
bool callchain;
+ bool add_callchain;
bool thread_stack;
bool last_branch;
unsigned int callchain_sz;
diff --git a/tools/perf/util/s390-cpumsf.c b/tools/perf/util/s390-cpumsf.c
index d7779e4..38a9428 100644
--- a/tools/perf/util/s390-cpumsf.c
+++ b/tools/perf/util/s390-cpumsf.c
@@ -1079,7 +1079,7 @@ static bool check_auxtrace_itrace(struct itrace_synth_opts *itops)
itops->pwr_events || itops->errors ||
itops->dont_decode || itops->calls || itops->returns ||
itops->callchain || itops->thread_stack ||
- itops->last_branch;
+ itops->last_branch || itops->add_callchain;
if (!ison)
return true;
pr_err("Unsupported --itrace options specified\n");
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