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>
---
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 d460049..1a36259 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 a1b0403..cd58f01 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -883,6 +883,8 @@ const 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()
};
--
1.7.9.5
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