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Date: Sat, 16 Nov 2019 15:48:41 +0800
From: lqqq341 <liuqi115@...ilicon.com>
To: <peterz@...radead.org>, <mingo@...hat.com>, <acme@...nel.org>,
<ak@...ux.intel.com>
CC: <mark.rutland@....com>, <alexander.shishkin@...ux.intel.com>,
<jolsa@...hat.com>, <namhyung@...nel.org>,
<linux-kernel@...r.kernel.org>, <linux-perf-users@...r.kernel.org>,
<linuxarm@...wei.com>, <john.garry@...wei.com>,
<zhangshaokun@...ilicon.com>, <huangdaode@...ilicon.com>,
<linyunsheng@...wei.com>, <liuqi115@...ilicon.com>
Subject: [PATCH] Perf stat: Fix the ratio comments of miss-events
From: Qi Liu <liuqi115@...ilicon.com>
Perf stat displays miss ratio of L1-dcache, L1-icache, dTLB cache,
iTLB cache and LL-cache. Take L1-dcache for example, its 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@...ilicon.com>
---
tools/perf/util/stat-shadow.c | 30 ++++++++++++++++++++----------
1 file changed, 20 insertions(+), 10 deletions(-)
diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c
index 2c41d47..a3bdf2b 100644
--- a/tools/perf/util/stat-shadow.c
+++ b/tools/perf/util/stat-shadow.c
@@ -506,7 +506,8 @@ 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,
@@ -527,7 +528,8 @@ 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,
@@ -547,7 +549,8 @@ 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,
@@ -567,7 +570,8 @@ 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,
@@ -587,7 +591,8 @@ 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);
}
/*
@@ -872,7 +877,8 @@ 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 |
@@ -882,7 +888,8 @@ 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 |
@@ -892,7 +899,8 @@ 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 |
@@ -902,7 +910,8 @@ 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 |
@@ -912,7 +921,8 @@ 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 (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES)) {
total = runtime_stat_avg(st, STAT_CACHEREFS, ctx, cpu);
--
2.8.1
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