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Commit 4b6c5177 authored by Stephane Eranian's avatar Stephane Eranian Committed by Ingo Molnar
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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: default avatarStephane Eranian <eranian@google.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1411559322-16548-6-git-send-email-eranian@google.com


Cc: cebbert.lkml@gmail.com
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 26ff0f0a

tools/perf/Documentation/perf-record.txt

+6 −0
Original line number Diff line number Diff line
@@ -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]

tools/perf/builtin-record.c

+2 −0
Original line number Diff line number Diff line
@@ -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()

};