diff options
| author | Alexander Shishkin <alexander.shishkin@linux.intel.com> | 2019-08-06 17:41:01 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-08-14 10:59:59 -0300 |
| commit | ce7b0e426ef359ee1d4a6126314ee3547a8eed87 (patch) | |
| tree | 6d8433c74638b13e9a262e58c7c4e4456fa1058c /tools/perf/util/auxtrace.c | |
| parent | 73e5de70dca00344cb48e018131a4cadec0fabf0 (diff) | |
perf record: Add an option to take an AUX snapshot on exit
It is sometimes useful to generate a snapshot when perf record exits;
I've been using a wrapper script around the workload that would do a
killall -USR2 perf when the workload exits.
This patch makes it easier and also works when perf record is attached
to a pre-existing task. A new snapshot option 'e' can be specified in
-S to enable this behavior:
root@elsewhere:~# perf record -e intel_pt// -Se sleep 1
[ perf record: Woken up 2 times to write data ]
[ perf record: Captured and wrote 0.085 MB perf.data ]
Co-developed-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190806144101.62892-1-alexander.shishkin@linux.intel.com
[ Fixed up !HAVE_AUXTRACE_SUPPORT build in builtin-record.c, adding 2 missing __maybe_unused ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/auxtrace.c')
| -rw-r--r-- | tools/perf/util/auxtrace.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c index 65728cdeefb6..72ce4c5e7c78 100644 --- a/tools/perf/util/auxtrace.c +++ b/tools/perf/util/auxtrace.c @@ -539,9 +539,9 @@ int auxtrace_record__snapshot_start(struct auxtrace_record *itr) return 0; } -int auxtrace_record__snapshot_finish(struct auxtrace_record *itr) +int auxtrace_record__snapshot_finish(struct auxtrace_record *itr, bool on_exit) { - if (itr && itr->snapshot_finish) + if (!on_exit && itr && itr->snapshot_finish) return itr->snapshot_finish(itr); return 0; } @@ -577,6 +577,16 @@ int auxtrace_parse_snapshot_options(struct auxtrace_record *itr, if (!str) return 0; + /* PMU-agnostic options */ + switch (*str) { + case 'e': + opts->auxtrace_snapshot_on_exit = true; + str++; + break; + default: + break; + } + if (itr) return itr->parse_snapshot_options(itr, opts, str); |