[PATCH v3 2/4] perf tools top: Add --weight option
Andi Kleen <[email protected]>
| Newsgroups | org.kernel.vger.linux-perf-users |
|---|---|
| Message-ID | <[email protected]> |
Add a -W/--weight option to perf top to collect weights too. Useful with follow on patches. Assisted-by: omp:GPT-5.6-Luna Signed-off-by: Andi Kleen <[email protected]> --- tools/perf/Documentation/perf-top.txt | 6 ++++++ tools/perf/builtin-top.c | 2 ++ 2 files changed, 8 insertions(+) diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt index af3e4230c72f..2da2a16bbf26 100644 --- a/tools/perf/Documentation/perf-top.txt +++ b/tools/perf/Documentation/perf-top.txt @@ -25,6 +25,12 @@ OPTIONS --count=<count>:: Event period to sample. +-W:: +--weight:: +Enable weighted sampling. One or more additional weights can be recorded per sample +and can be displayed with the weight, weight2, weight3 and local_weight sort keys. +Possible uses for weights are memory or instruction retirement latencies. + -C <cpu-list>:: --cpu=<cpu>:: Monitor only on the list of CPUs provided. Multiple CPUs can be provided as a diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 570410599f1b..2888ac3b7b92 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -1493,6 +1493,8 @@ int cmd_top(int argc, const char **argv) OPT_CALLBACK(0, "filter", &top.evlist, "filter", "event filter", parse_filter), OPT_U64('c', "count", &opts->user_interval, "event period to sample"), + OPT_BOOLEAN('W', "weight", &opts->sample_weight, + "sample by weight (on special events only)"), OPT_STRING('p', "pid", &target->pid, "pid", "profile events on existing process id"), OPT_STRING('t', "tid", &target->tid, "tid", -- 2.55.0