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author | Akihiro Nagai <akihiro.nagai.hw@hitachi.com> | 2012-01-30 13:43:09 +0900 |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2012-01-30 18:08:43 -0200 |
commit | 9558259697b827106b464648e850e568e0b0c931 (patch) | |
tree | 34d1656764bfcee2d5c931d73f2519c78f7cfd95 /tools/perf/builtin-script.c | |
parent | 547a92e0aedb88129e7fbd804697a11949de2e5a (diff) | |
download | linux-3.10-9558259697b827106b464648e850e568e0b0c931.tar.gz linux-3.10-9558259697b827106b464648e850e568e0b0c931.tar.bz2 linux-3.10-9558259697b827106b464648e850e568e0b0c931.zip |
perf script: Print branch_from and branch_to of BTS events
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:
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]
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: yrl.pp-manager.tt@hitachi.com
Link: http://lkml.kernel.org/r/20120130044309.2384.44252.stgit@linux3
Signed-off-by: Akihiro Nagai <akihiro.nagai.hw@hitachi.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-script.c')
-rw-r--r-- | 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 add13ec1597..414d49ad83d 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); |