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perf list: Print matching PMU events for --unit

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When --unit option is used, pmu_glob is set to the argument.  It should
match with event PMU and display the matching ones only.  But it also
shows raw events and metrics after that.

  $ perf list --unit tool
  List of pre-defined events (to be used in -e or -M):

  tool:
    core_wide
         [1 if not SMT,if SMT are events being gathered on all SMT threads 1 otherwise 0. Unit: tool]
    duration_time
         [Wall clock interval time in nanoseconds. Unit: tool]
    has_pmem
         [1 if persistent memory installed otherwise 0. Unit: tool]
    num_cores
         [Number of cores. A core consists of 1 or more thread,with each thread being associated with a logical Linux CPU. Unit: tool]
    num_cpus
         [Number of logical Linux CPUs. There may be multiple such CPUs on a core. Unit: tool]
    ...
    rNNN                                               [Raw event descriptor]
    cpu/event=0..255,pc,edge,.../modifier              [Raw event descriptor]
         [(see 'man perf-list' or 'man perf-record' on how to encode it)]
    breakpoint//modifier                               [Raw event descriptor]
    cstate_core/event=0..0xffffffffffffffff/modifier   [Raw event descriptor]
    cstate_pkg/event=0..0xffffffffffffffff/modifier    [Raw event descriptor]
    drm_i915//modifier                                 [Raw event descriptor]
    hwmon_acpitz//modifier                             [Raw event descriptor]
    hwmon_ac//modifier                                 [Raw event descriptor]
    hwmon_bat0//modifier                               [Raw event descriptor]
    hwmon_coretemp//modifier                           [Raw event descriptor]
    ...

  Metric Groups:

  Backend: [Grouping from Top-down Microarchitecture Analysis Metrics spreadsheet]
    tma_core_bound
         [This metric represents fraction of slots where Core non-memory issues were of a bottleneck]
    tma_info_core_ilp
         [Instruction-Level-Parallelism (average number of uops executed when there is execution) per thread (logical-processor)]
    tma_info_memory_l2mpki
         [L2 cache true misses per kilo instruction for retired demand loads]
    ...

This change makes it print the tool PMU events only.

Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
This commit is contained in:
Namhyung Kim 2025-11-19 16:47:24 -08:00
parent 41b67ab3d2
commit 8cf9cca7f6
1 changed files with 5 additions and 3 deletions
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8
tools/perf/builtin-list.c
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@ -130,7 +130,7 @@ static void default_print_event(void *ps, const char *topic,
if (deprecated && !print_state->deprecated)
return;
if (print_state->pmu_glob && pmu_name && !strglobmatch(pmu_name, print_state->pmu_glob))
if (print_state->pmu_glob && (!pmu_name || !strglobmatch(pmu_name, print_state->pmu_glob)))
return;
if (print_state->exclude_abi && pmu_type < PERF_TYPE_MAX && pmu_type != PERF_TYPE_RAW)
@ -612,8 +612,10 @@ int cmd_list(int argc, const char **argv)
print_cb.print_start(ps);
if (argc == 0) {
default_ps.metrics = true;
default_ps.metricgroups = true;
if (!unit_name) {
default_ps.metrics = true;
default_ps.metricgroups = true;
}
print_events(&print_cb, ps);
goto out;
}