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Date: Tue, 7 Dec 2021 11:46:17 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Jin Yao <yao.jin@...ux.intel.com>
Cc: jolsa@...nel.org, peterz@...radead.org, mingo@...hat.com,
alexander.shishkin@...ux.intel.com, Linux-kernel@...r.kernel.org,
linux-perf-users@...r.kernel.org, ak@...ux.intel.com,
kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH] perf stat: Support --cputype option for hybrid events
Em Thu, Sep 09, 2021 at 02:22:15PM +0800, Jin Yao escreveu:
> In previous patch, we have supported the syntax which enables
> the event on a specified pmu, such as:
Fell thru the cracks :-\
Thanks, applied.
- Arnaldo
> cpu_core/<event>/
> cpu_atom/<event>/
>
> While this syntax is not very easy for applying on a set of
> events or applying on a group. In following example, we have to
> explicitly assign the pmu prefix.
>
> # ./perf stat -e '{cpu_core/cycles/,cpu_core/instructions/}' -- sleep 1
>
> Performance counter stats for 'sleep 1':
>
> 1,158,545 cpu_core/cycles/
> 1,003,113 cpu_core/instructions/
>
> 1.002428712 seconds time elapsed
>
> A much easier way is:
>
> # ./perf stat --cputype core -e '{cycles,instructions}' -- sleep 1
>
> Performance counter stats for 'sleep 1':
>
> 1,101,071 cpu_core/cycles/
> 939,892 cpu_core/instructions/
>
> 1.002363142 seconds time elapsed
>
> For this example, the '--cputype' enables the events from specified
> pmu (cpu_core).
>
> If '--cputype' conflicts with pmu prefix, '--cputype' is ignored.
>
> # ./perf stat --cputype core -e cycles,cpu_atom/instructions/ -a -- sleep 1
>
> Performance counter stats for 'system wide':
>
> 21,003,407 cpu_core/cycles/
> 367,886 cpu_atom/instructions/
>
> 1.002203520 seconds time elapsed
>
> Signed-off-by: Jin Yao <yao.jin@...ux.intel.com>
> ---
> tools/perf/Documentation/perf-stat.txt | 4 ++++
> tools/perf/builtin-stat.c | 24 ++++++++++++++++++++++++
> tools/perf/util/evlist.h | 1 +
> tools/perf/util/parse-events-hybrid.c | 9 ++++++---
> 4 files changed, 35 insertions(+), 3 deletions(-)
>
> diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt
> index 4c9310be6acc..33da737161a6 100644
> --- a/tools/perf/Documentation/perf-stat.txt
> +++ b/tools/perf/Documentation/perf-stat.txt
> @@ -493,6 +493,10 @@ This option can be enabled in perf config by setting the variable
>
> $ perf config stat.no-csv-summary=true
>
> +--cputype::
> +Only enable events on applying cpu with this type for hybrid platform
> +(e.g. core or atom)"
> +
> EXAMPLES
> --------
>
> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> index f6e87b7be5fa..752e2bf1029f 100644
> --- a/tools/perf/builtin-stat.c
> +++ b/tools/perf/builtin-stat.c
> @@ -1168,6 +1168,26 @@ static int parse_stat_cgroups(const struct option *opt,
> return parse_cgroups(opt, str, unset);
> }
>
> +static int parse_hybrid_type(const struct option *opt,
> + const char *str,
> + int unset __maybe_unused)
> +{
> + struct evlist *evlist = *(struct evlist **)opt->value;
> +
> + if (!list_empty(&evlist->core.entries)) {
> + fprintf(stderr, "Must define cputype before events/metrics\n");
> + return -1;
> + }
> +
> + evlist->hybrid_pmu_name = perf_pmu__hybrid_type_to_pmu(str);
> + if (!evlist->hybrid_pmu_name) {
> + fprintf(stderr, "--cputype %s is not supported!\n", str);
> + return -1;
> + }
> +
> + return 0;
> +}
> +
> static struct option stat_options[] = {
> OPT_BOOLEAN('T', "transaction", &transaction_run,
> "hardware transaction statistics"),
> @@ -1282,6 +1302,10 @@ static struct option stat_options[] = {
> "don't print 'summary' for CSV summary output"),
> OPT_BOOLEAN(0, "quiet", &stat_config.quiet,
> "don't print output (useful with record)"),
> + OPT_CALLBACK(0, "cputype", &evsel_list, "hybrid cpu type",
> + "Only enable events on applying cpu with this type "
> + "for hybrid platform (e.g. core or atom)",
> + parse_hybrid_type),
> #ifdef HAVE_LIBPFM
> OPT_CALLBACK(0, "pfm-events", &evsel_list, "event",
> "libpfm4 event selector. use 'perf list' to list available events",
> diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
> index 97bfb8d0be4f..7af5b247e319 100644
> --- a/tools/perf/util/evlist.h
> +++ b/tools/perf/util/evlist.h
> @@ -64,6 +64,7 @@ struct evlist {
> struct evsel *selected;
> struct events_stats stats;
> struct perf_env *env;
> + const char *hybrid_pmu_name;
> void (*trace_event_sample_raw)(struct evlist *evlist,
> union perf_event *event,
> struct perf_sample *sample);
> diff --git a/tools/perf/util/parse-events-hybrid.c b/tools/perf/util/parse-events-hybrid.c
> index 10160ab126f9..3875a8d086e4 100644
> --- a/tools/perf/util/parse-events-hybrid.c
> +++ b/tools/perf/util/parse-events-hybrid.c
> @@ -62,10 +62,13 @@ static int create_event_hybrid(__u32 config_type, int *idx,
> static int pmu_cmp(struct parse_events_state *parse_state,
> struct perf_pmu *pmu)
> {
> - if (!parse_state->hybrid_pmu_name)
> - return 0;
> + if (parse_state->evlist && parse_state->evlist->hybrid_pmu_name)
> + return strcmp(parse_state->evlist->hybrid_pmu_name, pmu->name);
> +
> + if (parse_state->hybrid_pmu_name)
> + return strcmp(parse_state->hybrid_pmu_name, pmu->name);
>
> - return strcmp(parse_state->hybrid_pmu_name, pmu->name);
> + return 0;
> }
>
> static int add_hw_hybrid(struct parse_events_state *parse_state,
> --
> 2.17.1
--
- Arnaldo
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