From: Akihiro Nagai <akihiro.nagai.hw@hitachi.com>
To: Arnaldo Carvalho de Melo <acme@infradead.org>,
Ingo Molnar <mingo@elte.hu>,
Peter Zijlstra <peterz@infradead.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
David Ahern <dsahern@gmail.com>
Cc: linux-kernel@vger.kernel.org,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
yrl.pp-manager.tt@hitachi.com,
Akihiro Nagai <akihiro.nagai.hw@hitachi.com>,
Peter Zijlstra <peterz@infradead.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
Paul Mackerras <paulus@samba.org>, Ingo Molnar <mingo@elte.hu>,
Arnaldo Carvalho de Melo <acme@infradead.org>,
David Ahern <dsahern@gmail.com>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Subject: [PATCH -tip v5 3/5] perf script: print branch_from and branch_to of BTS events
Date: Mon, 30 Jan 2012 13:43:09 +0900 [thread overview]
Message-ID: <20120130044309.2384.44252.stgit@linux3> (raw)
In-Reply-To: <20120130044242.2384.23076.stgit@linux3>
BTS records branch_from_addr and branch_to_addr in IP and ADDR field in perf_sample.
This patch enables to print them in following format,
<from_addr> <from_symbol> (<from_dso>) => <to_addr> <to_symbol> (<to_dso>)
Sample:
# perf script -f ip,addr,dso,sym
ffffffff814675d2 irq_return ([kernel.kallsyms]) => 3f03e016b0 _start (/lib64/ld-2.14.so)
ffffffff814675d2 irq_return ([kernel.kallsyms]) => 3f03e016b0 _start (/lib64/ld-2.14.so)
3f03e016b3 _start (/lib64/ld-2.14.so) => 3f03e04b80 _dl_start (/lib64/ld-2.14.so)
ffffffff814675d2 irq_return ([kernel.kallsyms]) => 3f03e04b80 _dl_start (/lib64/ld-2.14.so)
ffffffff814675d2 irq_return ([kernel.kallsyms]) => 3f03e04ba6 _dl_start (/lib64/ld-2.14.so)
ffffffff814675d2 irq_return ([kernel.kallsyms]) => 3f03e04bad _dl_start (/lib64/ld-2.14.so)
3f03e04bfb _dl_start (/lib64/ld-2.14.so) => 3f03e04c1d _dl_start (/lib64/ld-2.14.so)
[snip]
Changes in v5:
- Change the output format "<branch_to> <branch_from>" to
"<branch_from> => <branch_to>"
Signed-off-by: Akihiro Nagai <akihiro.nagai.hw@hitachi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
---
tools/perf/builtin-script.c | 42 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 42 insertions(+), 0 deletions(-)
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index add13ec..414d49a 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -304,6 +304,13 @@ static void print_sample_start(struct perf_sample *sample,
}
}
+static bool is_bts_event(struct perf_event_attr *attr)
+{
+ return ((attr->type == PERF_TYPE_HARDWARE) &&
+ (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
+ (attr->sample_period == 1));
+}
+
static bool sample_addr_correlates_sym(struct perf_event_attr *attr)
{
if ((attr->type == PERF_TYPE_SOFTWARE) &&
@@ -312,6 +319,9 @@ static bool sample_addr_correlates_sym(struct perf_event_attr *attr)
(attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)))
return true;
+ if (is_bts_event(attr))
+ return true;
+
return false;
}
@@ -353,6 +363,33 @@ static void print_sample_addr(union perf_event *event,
}
}
+static void print_sample_bts(union perf_event *event,
+ struct perf_sample *sample,
+ struct perf_evsel *evsel,
+ struct machine *machine,
+ struct thread *thread)
+{
+ struct perf_event_attr *attr = &evsel->attr;
+
+ /* print branch_from information */
+ if (PRINT_FIELD(IP)) {
+ if (!symbol_conf.use_callchain)
+ printf(" ");
+ else
+ printf("\n");
+ perf_event__print_ip(event, sample, machine, evsel,
+ PRINT_FIELD(SYM), PRINT_FIELD(DSO));
+ }
+
+ printf(" => ");
+
+ /* print branch_to information */
+ if (PRINT_FIELD(ADDR))
+ print_sample_addr(event, sample, machine, thread, attr);
+
+ printf("\n");
+}
+
static void process_event(union perf_event *event __unused,
struct perf_sample *sample,
struct perf_evsel *evsel,
@@ -366,6 +403,11 @@ static void process_event(union perf_event *event __unused,
print_sample_start(sample, thread, attr);
+ if (is_bts_event(attr)) {
+ print_sample_bts(event, sample, evsel, machine, thread);
+ return;
+ }
+
if (PRINT_FIELD(TRACE))
print_trace_event(sample->cpu, sample->raw_data,
sample->raw_size);
next prev parent reply other threads:[~2012-01-30 4:44 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-30 4:42 [PATCH -tip v5 0/5] perf script: add BTS analysis features Akihiro Nagai
2012-01-30 4:42 ` [PATCH -tip v5 1/5] perf-script: unify the expressions indicate "unknown" Akihiro Nagai
2012-01-31 13:17 ` [tip:perf/core] perf script: Unify the expressions indicating " unknown" tip-bot for Akihiro Nagai
2012-01-30 4:43 ` [PATCH -tip v5 2/5] perf: set correct value to perf_event_header.misc for BTS Akihiro Nagai
2012-01-30 9:35 ` Peter Zijlstra
2012-02-21 5:39 ` Akihiro Nagai
2012-03-06 17:32 ` Peter Zijlstra
2012-03-16 2:22 ` Akihiro Nagai
2012-01-30 4:43 ` Akihiro Nagai [this message]
2012-01-31 13:18 ` [tip:perf/core] perf script: Print branch_from and branch_to of BTS events tip-bot for Akihiro Nagai
2012-01-30 4:43 ` [PATCH -tip v5 4/5] perf script: add the offset field specifier Akihiro Nagai
2012-01-31 13:19 ` [tip:perf/core] perf script: Add " tip-bot for Akihiro Nagai
2012-01-30 4:43 ` [PATCH -tip v5 5/5] perf script: add option resolving vmlinux path Akihiro Nagai
2012-01-31 13:20 ` [tip:perf/core] perf script: Add " tip-bot for Akihiro Nagai
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