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perf record: Extend -D,--delay option with -1 value

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Extend -D,--delay option with -1 to start collection with events
disabled to be enabled later by 'enable' command provided via control
file descriptor.

Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/3e7d362c-7973-ee5d-e81e-c60ea22432c3@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Alexey Budankov
2020-07-17 10:07:03 +03:00
committed by Arnaldo Carvalho de Melo
parent 27e9769aad
commit 68cd3b45b9
4 changed files with 13 additions and 8 deletions
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12
tools/perf/builtin-record.c
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@@ -1786,8 +1786,12 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
}
if (opts->initial_delay) {
usleep(opts->initial_delay * USEC_PER_MSEC);
evlist__enable(rec->evlist);
pr_info(EVLIST_DISABLED_MSG);
if (opts->initial_delay > 0) {
usleep(opts->initial_delay * USEC_PER_MSEC);
evlist__enable(rec->evlist);
pr_info(EVLIST_ENABLED_MSG);
}
}
trigger_ready(&auxtrace_snapshot_trigger);
@@ -2499,8 +2503,8 @@ static struct option __record_options[] = {
OPT_CALLBACK('G', "cgroup", &record.evlist, "name",
"monitor event in cgroup name only",
parse_cgroups),
OPT_UINTEGER('D', "delay", &record.opts.initial_delay,
"ms to wait before starting measurement after program start"),
OPT_INTEGER('D', "delay", &record.opts.initial_delay,
"ms to wait before starting measurement after program start (-1: start with events disabled)"),
OPT_BOOLEAN(0, "kcore", &record.opts.kcore, "copy /proc/kcore"),
OPT_STRING('u', "uid", &record.opts.target.uid_str, "user",
"user to profile"),