Messages in this thread Patch in this message | | | Subject | [PATCH v2 08/11] perf record: extend -D,--delay option with -1 value | From | Alexey Budankov <> | Date | Wed, 6 May 2020 21:28:22 +0300 |
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Extend -D,--delay option with -1 to start collection with events disabled to be enbled later by enable command provided via control file descriptor.
Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com> --- tools/perf/builtin-record.c | 12 ++++++++---- tools/perf/builtin-trace.c | 2 +- tools/perf/util/record.h | 2 +- 3 files changed, 10 insertions(+), 6 deletions(-)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index e4efdbf1a81e..8a14e68b86ad 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -1704,8 +1704,12 @@ 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(PERF_EVLIST__DISABLED_MSG); + if (opts->initial_delay > 0) { + usleep(opts->initial_delay * USEC_PER_MSEC); + evlist__enable(rec->evlist); + pr_info(PERF_EVLIST__ENABLED_MSG); + } } trigger_ready(&auxtrace_snapshot_trigger); @@ -2413,8 +2417,8 @@ 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"), diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index a46efb907bd4..63f69a927f3c 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -4773,7 +4773,7 @@ int cmd_trace(int argc, const char **argv) "per thread proc mmap processing timeout in ms"), OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only", trace__parse_cgroups), - OPT_UINTEGER('D', "delay", &trace.opts.initial_delay, + OPT_INTEGER('D', "delay", &trace.opts.initial_delay, "ms to wait before starting measurement after program " "start"), OPTS_EVSWITCH(&trace.evswitch), diff --git a/tools/perf/util/record.h b/tools/perf/util/record.h index 923565c3b155..96a73bbd8cd4 100644 --- a/tools/perf/util/record.h +++ b/tools/perf/util/record.h @@ -60,7 +60,7 @@ struct record_opts { const char *auxtrace_snapshot_opts; const char *auxtrace_sample_opts; bool sample_transaction; - unsigned initial_delay; + int initial_delay; bool use_clockid; clockid_t clockid; u64 clockid_res_ns; -- 2.24.1
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