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Date: Wed, 16 Sep 2020 10:54:45 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Qi Liu <liuqi115@...wei.com>
Cc: ak@...ux.intel.com, mingo@...hat.com, linux-kernel@...r.kernel.org,
linuxarm@...wei.com
Subject: Re: [PATCH V2 RESEND] perf stat: Fix the ratio comments of
miss-events
Em Wed, Sep 16, 2020 at 06:48:51PM +0800, Qi Liu escreveu:
> Perf stat displays miss ratio of L1-dcache, L1-icache, dTLB cache,
> iTLB cache and LL-cache. Take L1-dcache for example, miss ratio is
> caculated as "L1-dcache-load-misses/L1-dcache-loads". So
> "of all L1-dcache hits" is unsuitable to describe it, and
> "of all L1-dcache accesses" seems better.
>
> The comments of L1-icache, dTLB cache, iTLB cache and LL-cache are
> fixed in the same way.
>
> Signed-off-by: Qi Liu <liuqi115@...wei.com>
> Reviewed-by: Andi Kleen <ak@...ux.intel.com>
Thanks, applied.
- Arnaldo
> ---
> tools/perf/util/stat-shadow.c | 20 ++++++++++----------
> 1 file changed, 10 insertions(+), 10 deletions(-)
>
> diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c
> index e1ba6c1..ee3c404 100644
> --- a/tools/perf/util/stat-shadow.c
> +++ b/tools/perf/util/stat-shadow.c
> @@ -517,7 +517,7 @@ static void print_l1_dcache_misses(struct perf_stat_config *config,
>
> color = get_ratio_color(GRC_CACHE_MISSES, ratio);
>
> - out->print_metric(config, out->ctx, color, "%7.2f%%", "of all L1-dcache hits", ratio);
> + out->print_metric(config, out->ctx, color, "%7.2f%%", "of all L1-dcache accesses", ratio);
> }
>
> static void print_l1_icache_misses(struct perf_stat_config *config,
> @@ -538,7 +538,7 @@ static void print_l1_icache_misses(struct perf_stat_config *config,
> ratio = avg / total * 100.0;
>
> color = get_ratio_color(GRC_CACHE_MISSES, ratio);
> - out->print_metric(config, out->ctx, color, "%7.2f%%", "of all L1-icache hits", ratio);
> + out->print_metric(config, out->ctx, color, "%7.2f%%", "of all L1-icache accesses", ratio);
> }
>
> static void print_dtlb_cache_misses(struct perf_stat_config *config,
> @@ -558,7 +558,7 @@ static void print_dtlb_cache_misses(struct perf_stat_config *config,
> ratio = avg / total * 100.0;
>
> color = get_ratio_color(GRC_CACHE_MISSES, ratio);
> - out->print_metric(config, out->ctx, color, "%7.2f%%", "of all dTLB cache hits", ratio);
> + out->print_metric(config, out->ctx, color, "%7.2f%%", "of all dTLB cache accesses", ratio);
> }
>
> static void print_itlb_cache_misses(struct perf_stat_config *config,
> @@ -578,7 +578,7 @@ static void print_itlb_cache_misses(struct perf_stat_config *config,
> ratio = avg / total * 100.0;
>
> color = get_ratio_color(GRC_CACHE_MISSES, ratio);
> - out->print_metric(config, out->ctx, color, "%7.2f%%", "of all iTLB cache hits", ratio);
> + out->print_metric(config, out->ctx, color, "%7.2f%%", "of all iTLB cache accesses", ratio);
> }
>
> static void print_ll_cache_misses(struct perf_stat_config *config,
> @@ -598,7 +598,7 @@ static void print_ll_cache_misses(struct perf_stat_config *config,
> ratio = avg / total * 100.0;
>
> color = get_ratio_color(GRC_CACHE_MISSES, ratio);
> - out->print_metric(config, out->ctx, color, "%7.2f%%", "of all LL-cache hits", ratio);
> + out->print_metric(config, out->ctx, color, "%7.2f%%", "of all LL-cache accesses", ratio);
> }
>
> /*
> @@ -918,7 +918,7 @@ void perf_stat__print_shadow_stats(struct perf_stat_config *config,
> if (runtime_stat_n(st, STAT_L1_DCACHE, ctx, cpu) != 0)
> print_l1_dcache_misses(config, cpu, evsel, avg, out, st);
> else
> - print_metric(config, ctxp, NULL, NULL, "of all L1-dcache hits", 0);
> + print_metric(config, ctxp, NULL, NULL, "of all L1-dcache accesses", 0);
> } else if (
> evsel->core.attr.type == PERF_TYPE_HW_CACHE &&
> evsel->core.attr.config == ( PERF_COUNT_HW_CACHE_L1I |
> @@ -928,7 +928,7 @@ void perf_stat__print_shadow_stats(struct perf_stat_config *config,
> if (runtime_stat_n(st, STAT_L1_ICACHE, ctx, cpu) != 0)
> print_l1_icache_misses(config, cpu, evsel, avg, out, st);
> else
> - print_metric(config, ctxp, NULL, NULL, "of all L1-icache hits", 0);
> + print_metric(config, ctxp, NULL, NULL, "of all L1-icache accesses", 0);
> } else if (
> evsel->core.attr.type == PERF_TYPE_HW_CACHE &&
> evsel->core.attr.config == ( PERF_COUNT_HW_CACHE_DTLB |
> @@ -938,7 +938,7 @@ void perf_stat__print_shadow_stats(struct perf_stat_config *config,
> if (runtime_stat_n(st, STAT_DTLB_CACHE, ctx, cpu) != 0)
> print_dtlb_cache_misses(config, cpu, evsel, avg, out, st);
> else
> - print_metric(config, ctxp, NULL, NULL, "of all dTLB cache hits", 0);
> + print_metric(config, ctxp, NULL, NULL, "of all dTLB cache accesses", 0);
> } else if (
> evsel->core.attr.type == PERF_TYPE_HW_CACHE &&
> evsel->core.attr.config == ( PERF_COUNT_HW_CACHE_ITLB |
> @@ -948,7 +948,7 @@ void perf_stat__print_shadow_stats(struct perf_stat_config *config,
> if (runtime_stat_n(st, STAT_ITLB_CACHE, ctx, cpu) != 0)
> print_itlb_cache_misses(config, cpu, evsel, avg, out, st);
> else
> - print_metric(config, ctxp, NULL, NULL, "of all iTLB cache hits", 0);
> + print_metric(config, ctxp, NULL, NULL, "of all iTLB cache accesses", 0);
> } else if (
> evsel->core.attr.type == PERF_TYPE_HW_CACHE &&
> evsel->core.attr.config == ( PERF_COUNT_HW_CACHE_LL |
> @@ -958,7 +958,7 @@ void perf_stat__print_shadow_stats(struct perf_stat_config *config,
> if (runtime_stat_n(st, STAT_LL_CACHE, ctx, cpu) != 0)
> print_ll_cache_misses(config, cpu, evsel, avg, out, st);
> else
> - print_metric(config, ctxp, NULL, NULL, "of all LL-cache hits", 0);
> + print_metric(config, ctxp, NULL, NULL, "of all LL-cache accesses", 0);
> } else if (evsel__match(evsel, HARDWARE, HW_CACHE_MISSES)) {
> total = runtime_stat_avg(st, STAT_CACHEREFS, ctx, cpu);
>
> --
> 2.8.1
>
--
- Arnaldo
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