| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Tue, 22 Oct 2019 16:07:09 +0800
From: Jin Yao <yao.jin@...ux.intel.com>
To: acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
mingo@...hat.com, alexander.shishkin@...ux.intel.com
Cc: Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
kan.liang@...el.com, yao.jin@...el.com,
Jin Yao <yao.jin@...ux.intel.com>
Subject: [PATCH v3 4/5] perf report: Support --percent-limit for total_cycles
We have already supported the 'total_cycles' option in previous
patch. It's also useful to show entries only above a threshold
percent.
This patch enables '--percent-limit' for not showing entries
under that percent.
For example,
perf report -s total_cycles --stdio --percent-limit 1
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 2M of event 'cycles'
# Event count (approx.): 2753248
#
# Sampled Cycles% Sampled Cycles Avg Cycles% Avg Cycles [Program Block Range] Shared Object
# ............... .............. ........... .......... ................................................................. ....................
#
26.04% 2.8M 0.40% 18 [div.c:42 -> div.c:39] div
15.17% 1.2M 0.16% 7 [random_r.c:357 -> random_r.c:380] libc-2.27.so
5.11% 402.0K 0.04% 2 [div.c:27 -> div.c:28] div
4.87% 381.6K 0.04% 2 [random.c:288 -> random.c:291] libc-2.27.so
4.53% 381.0K 0.04% 2 [div.c:40 -> div.c:40] div
3.85% 300.9K 0.02% 1 [div.c:22 -> div.c:25] div
3.08% 241.1K 0.02% 1 [rand.c:26 -> rand.c:27] libc-2.27.so
3.06% 240.0K 0.02% 1 [random.c:291 -> random.c:291] libc-2.27.so
2.78% 215.7K 0.02% 1 [random.c:298 -> random.c:298] libc-2.27.so
2.52% 198.3K 0.02% 1 [random.c:293 -> random.c:293] libc-2.27.so
2.36% 184.8K 0.02% 1 [rand.c:28 -> rand.c:28] libc-2.27.so
2.33% 180.5K 0.02% 1 [random.c:295 -> random.c:295] libc-2.27.so
2.28% 176.7K 0.02% 1 [random.c:295 -> random.c:295] libc-2.27.so
2.20% 168.8K 0.02% 1 [rand@...+0 -> rand@...+0] div
1.98% 158.2K 0.02% 1 [random_r.c:388 -> random_r.c:388] libc-2.27.so
1.57% 123.3K 0.02% 1 [div.c:42 -> div.c:44] div
1.44% 116.0K 0.42% 19 [random_r.c:357 -> random_r.c:394] libc-2.27.so
It only shows the entries which 'Sampled Cycles%' > 1%.
v3:
---
Minor change since the function name is changed:
block_total_cycles_percent -> block_info__total_cycles_percent
Signed-off-by: Jin Yao <yao.jin@...ux.intel.com>
---
tools/perf/builtin-report.c | 2 +-
tools/perf/ui/stdio/hist.c | 7 ++++++-
tools/perf/util/block-info.c | 10 ++++++++++
tools/perf/util/block-info.h | 2 ++
4 files changed, 19 insertions(+), 2 deletions(-)
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 44aed40e9071..dbae1812ce47 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -794,7 +794,7 @@ static int hists__fprintf_all_blocks(struct hists *hists, struct report *rep)
get_block_hists(hists, bh, rep);
symbol_conf.report_individual_block = true;
- hists__fprintf(&bh->block_hists, true, 0, 0, 0,
+ hists__fprintf(&bh->block_hists, true, 0, 0, rep->min_percent,
stdout, true);
hists__delete_entries(&bh->block_hists);
return 0;
diff --git a/tools/perf/ui/stdio/hist.c b/tools/perf/ui/stdio/hist.c
index 655ef7708cd0..132056c7d5b7 100644
--- a/tools/perf/ui/stdio/hist.c
+++ b/tools/perf/ui/stdio/hist.c
@@ -15,6 +15,7 @@
#include "../../util/srcline.h"
#include "../../util/string2.h"
#include "../../util/thread.h"
+#include "../../util/block-info.h"
#include <linux/ctype.h>
#include <linux/zalloc.h>
@@ -856,7 +857,11 @@ size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows,
if (h->filtered)
continue;
- percent = hist_entry__get_percent_limit(h);
+ if (symbol_conf.report_individual_block)
+ percent = block_info__total_cycles_percent(h);
+ else
+ percent = hist_entry__get_percent_limit(h);
+
if (percent < min_pcnt)
continue;
diff --git a/tools/perf/util/block-info.c b/tools/perf/util/block-info.c
index b9954a32b8f4..376632923f75 100644
--- a/tools/perf/util/block-info.c
+++ b/tools/perf/util/block-info.c
@@ -127,3 +127,13 @@ int block_info__process_sym(struct hist_entry *he, struct block_hist *bh,
return 0;
}
+
+float block_info__total_cycles_percent(struct hist_entry *he)
+{
+ struct block_info *bi = he->block_info;
+
+ if (bi->total_cycles)
+ return bi->cycles * 100.0 / bi->total_cycles;
+
+ return 0.0;
+}
diff --git a/tools/perf/util/block-info.h b/tools/perf/util/block-info.h
index d55dfc2fda6f..b21057beed00 100644
--- a/tools/perf/util/block-info.h
+++ b/tools/perf/util/block-info.h
@@ -40,4 +40,6 @@ int64_t block_info__cmp(struct perf_hpp_fmt *fmt __maybe_unused,
int block_info__process_sym(struct hist_entry *he, struct block_hist *bh,
u64 *block_cycles_aggr, u64 total_cycles);
+float block_info__total_cycles_percent(struct hist_entry *he);
+
#endif /* __PERF_BLOCK_H */
--
2.17.1
Powered by blists - more mailing lists