diff options
Diffstat (limited to 'tools/perf/builtin-record.c')
| -rw-r--r-- | tools/perf/builtin-record.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 4194ea5ac729..8898357325cf 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -3162,6 +3162,28 @@ out_free: return ret; } +static int record__parse_off_cpu_thresh(const struct option *opt, + const char *str, + int unset __maybe_unused) +{ + struct record_opts *opts = opt->value; + char *endptr; + u64 off_cpu_thresh_ms; + + if (!str) + return -EINVAL; + + off_cpu_thresh_ms = strtoull(str, &endptr, 10); + + /* the threshold isn't string "0", yet strtoull() returns 0, parsing failed */ + if (*endptr || (off_cpu_thresh_ms == 0 && strcmp(str, "0"))) + return -EINVAL; + else + opts->off_cpu_thresh_ns = off_cpu_thresh_ms * NSEC_PER_MSEC; + + return 0; +} + void __weak arch__add_leaf_frame_record_opts(struct record_opts *opts __maybe_unused) { } @@ -3355,6 +3377,7 @@ static struct record record = { .ctl_fd = -1, .ctl_fd_ack = -1, .synth = PERF_SYNTH_ALL, + .off_cpu_thresh_ns = OFFCPU_THRESH, }, }; @@ -3582,6 +3605,9 @@ static struct option __record_options[] = { OPT_BOOLEAN(0, "off-cpu", &record.off_cpu, "Enable off-cpu analysis"), OPT_STRING(0, "setup-filter", &record.filter_action, "pin|unpin", "BPF filter action"), + OPT_CALLBACK(0, "off-cpu-thresh", &record.opts, "ms", + "Dump off-cpu samples if off-cpu time exceeds this threshold (in milliseconds). (Default: 500ms)", + record__parse_off_cpu_thresh), OPT_END() }; |