Commit-ID: 4b6c51773d86883a2e80cffadbe4f178ac1babd8 Gitweb: http://git.kernel.org/tip/4b6c51773d86883a2e80cffadbe4f178ac1babd8 Author: Stephane Eranian <eran...@google.com> AuthorDate: Wed, 24 Sep 2014 13:48:41 +0200 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Sun, 16 Nov 2014 11:42:02 +0100
perf record: Add new -I option to sample interrupted machine state Add -I/--intr-regs option to capture machine state registers at interrupt. Add the corresponding man page description Signed-off-by: Stephane Eranian <eran...@google.com> Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org> Link: http://lkml.kernel.org/r/1411559322-16548-6-git-send-email-eran...@google.com Cc: cebbert.l...@gmail.com Cc: Adrian Hunter <adrian.hun...@intel.com> Cc: Anshuman Khandual <khand...@linux.vnet.ibm.com> Cc: Arnaldo Carvalho de Melo <a...@kernel.org> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Masanari Iida <standby2...@gmail.com> Signed-off-by: Ingo Molnar <mi...@kernel.org> --- tools/perf/Documentation/perf-record.txt | 6 ++++++ tools/perf/builtin-record.c | 2 ++ 2 files changed, 8 insertions(+) diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index 398f8d5..af9a54e 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -214,6 +214,12 @@ if combined with -a or -C options. After starting the program, wait msecs before measuring. This is useful to filter out the startup phase of the program, which is often very different. +-I:: +--intr-regs:: +Capture machine state (registers) at interrupt, i.e., on counter overflows for +each sample. List of captured registers depends on the architecture. This option +is off by default. + SEE ALSO -------- linkperf:perf-stat[1], linkperf:perf-list[1] diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 582c4da..8648c6d 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -811,6 +811,8 @@ struct option __record_options[] = { "sample transaction flags (special events only)"), OPT_BOOLEAN(0, "per-thread", &record.opts.target.per_thread, "use per-thread mmaps"), + OPT_BOOLEAN('I', "intr-regs", &record.opts.sample_intr_regs, + "Sample machine registers on interrupt"), OPT_END() }; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
