diff options
Diffstat (limited to 'tools/perf/builtin-diff.c')
| -rw-r--r-- | tools/perf/builtin-diff.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c index 17cd898074c8..dfe6c7606f5a 100644 --- a/tools/perf/builtin-diff.c +++ b/tools/perf/builtin-diff.c @@ -83,6 +83,9 @@ static unsigned int sort_compute = 1; static s64 compute_wdiff_w1; static s64 compute_wdiff_w2; +static const char *cpu_list; +static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS); + enum { COMPUTE_DELTA, COMPUTE_RATIO, @@ -354,6 +357,11 @@ static int diff__process_sample_event(struct perf_tool *tool, return -1; } + if (cpu_list && !test_bit(sample->cpu, cpu_bitmap)) { + ret = 0; + goto out_put; + } + if (!hists__add_entry(hists, &al, NULL, NULL, NULL, sample, true)) { pr_warning("problem incrementing symbol period, skipping event\n"); goto out_put; @@ -892,6 +900,13 @@ static int __cmd_diff(void) goto out_delete; } + if (cpu_list) { + ret = perf_session__cpu_bitmap(d->session, cpu_list, + cpu_bitmap); + if (ret < 0) + goto out_delete; + } + ret = perf_session__process_events(d->session); if (ret) { pr_err("Failed to process %s\n", d->data.path); @@ -969,6 +984,7 @@ static const struct option options[] = { "How to display percentage of filtered entries", parse_filter_percentage), OPT_STRING(0, "time", &pdiff.time_str, "str", "Time span (time percent or absolute timestamp)"), + OPT_STRING(0, "cpu", &cpu_list, "cpu", "list of cpus to profile"), OPT_END() }; |