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Jin Yao authored
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 --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@plt+0 -> rand@plt+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 Committer testing: From second exapmple onwards slightly edited for brevity: # perf report --total-cycles --percent-limit 2 --stdio # To display the perf.data header info, please use --header/--header-only options. # # # Total Lost Samples: 0 # # Samples: 6M of event 'cycles' # Event count (approx.): 6299936 # # Sampled Cycles% Sampled Cycles Avg Cycles% Avg Cycles [Program Block Range] Shared Object # ............... .............. ........... .......... ...................................................................... .................... # 2.17% 1.7M 0.08% 607 [compiler.h:199 -> common.c:221] [kernel.vmlinux] # # (Tip: Create an archive with symtabs to analyse on other machine: perf archive) # # perf report --total-cycles --percent-limit 1 --stdio # Sampled Cycles% Sampled Cycles Avg Cycles% Avg Cycles [Program Block Range] Shared Object 2.17% 1.7M 0.08% 607 [compiler.h:199 -> common.c:221] [kernel.vmlinux] 1.75% 1.3M 8.34% 65.5K [memset-vec-unaligned-erms.S:147 -> memset-vec-unaligned-erms.S:151] libc-2.29.so # # perf report --total-cycles --percent-limit 0.7 --stdio # Sampled Cycles% Sampled Cycles Avg Cycles% Avg Cycles [Program Block Range] Shared Object 2.17% 1.7M 0.08% 607 [compiler.h:199 -> common.c:221] [kernel.vmlinux] 1.75% 1.3M 8.34% 65.5K [memset-vec-unaligned-erms.S:147 -> memset-vec-unaligned-erms.S:151] libc-2.29.so 0.72% 544.5K 0.03% 230 [entry_64.S:657 -> entry_64.S:662] [kernel.vmlinux] # ------------------------------------------- It only shows the entries which 'Sampled Cycles%' > 1%. v7: --- No functional change. Only fix the conflict issue because previous patches are changed. v6: --- No functional change. Only fix the conflict issue because previous patches are changed. v5: --- No functional change. Only fix the conflict issue because previous patches are changed. v4: --- No functional change. Only fix the build issue because previous patches are changed. Signed-off-by:Jin Yao <yao.jin@linux.intel.com> Reviewed-by:
Jiri Olsa <jolsa@kernel.org> Tested-by:
Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@intel.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20191107074719.26139-7-yao.jin@linux.intel.comSigned-off-by:
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