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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 Original line 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

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.

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

SEE ALSO

--------

--------

linkperf:perf-stat[1], linkperf:perf-list[1]
 
linkperf:perf-stat[1], linkperf:perf-list[1]

tools/perf/builtin-record.c

+2 −0
Original line number Original line Diff line number Diff line
@@ -811,6 +811,8 @@ struct option __record_options[] = { 
		    "sample transaction flags (special events only)"),

		    "sample transaction flags (special events only)"),

	OPT_BOOLEAN(0, "per-thread", &record.opts.target.per_thread,

	OPT_BOOLEAN(0, "per-thread", &record.opts.target.per_thread,

		    "use per-thread mmaps"),

		    "use per-thread mmaps"),

	OPT_BOOLEAN('I', "intr-regs", &record.opts.sample_intr_regs,

		    "Sample machine registers on interrupt"),

	OPT_END()

	OPT_END()

};

};