Messages in this thread | | | From | Jin Yao <> | Subject | [PATCH v6 0/5] perf stat: Support overall statistics for interval mode | Date | Wed, 20 May 2020 12:27:32 +0800 |
| |
Currently perf-stat supports to print counts at regular interval (-I), but it's not very easy for user to get the overall statistics.
With this patchset, it supports to report the summary at the end of interval output.
For example,
root@kbl-ppc:~# perf stat -e cycles -I1000 --interval-count 2 # time counts unit events 1.000412064 2,281,114 cycles 2.001383658 2,547,880 cycles
Performance counter stats for 'system wide':
4,828,994 cycles
2.002860349 seconds time elapsed
root@kbl-ppc:~# perf stat -e cycles,instructions -I1000 --interval-count 2 # time counts unit events 1.000389902 1,536,093 cycles 1.000389902 420,226 instructions # 0.27 insn per cycle 2.001433453 2,213,952 cycles 2.001433453 735,465 instructions # 0.33 insn per cycle
Performance counter stats for 'system wide':
3,750,045 cycles 1,155,691 instructions # 0.31 insn per cycle
2.003023361 seconds time elapsed
root@kbl-ppc:~# perf stat -M CPI,IPC -I1000 --interval-count 2 # time counts unit events 1.000435121 905,303 inst_retired.any # 2.9 CPI 1.000435121 2,663,333 cycles 1.000435121 914,702 inst_retired.any # 0.3 IPC 1.000435121 2,676,559 cpu_clk_unhalted.thread 2.001615941 1,951,092 inst_retired.any # 1.8 CPI 2.001615941 3,551,357 cycles 2.001615941 1,950,837 inst_retired.any # 0.5 IPC 2.001615941 3,551,044 cpu_clk_unhalted.thread
Performance counter stats for 'system wide':
2,856,395 inst_retired.any # 2.2 CPI 6,214,690 cycles 2,865,539 inst_retired.any # 0.5 IPC 6,227,603 cpu_clk_unhalted.thread
2.003403078 seconds time elapsed
v6: --- 1. Add comments in perf_evlist__save_aggr_prev_raw_counts. 2. Move init_stats(&walltime_nsecs_stats) under interval condition check.
Following patches are changed in v6. perf stat: Save aggr value to first member of prev_raw_counts perf stat: Report summary for interval mode
v5: --- 1. Create new patch "perf stat: Save aggr value to first member of prev_raw_counts".
2. Call perf_evlist__save_aggr_prev_raw_counts to save aggr value to first member of prev_raw_counts for AGGR_GLOBAL. Then next, perf_stat_process_counter can create aggr values from per cpu values.
Following patches are impacted in v5: perf stat: Copy counts from prev_raw_counts to evsel->counts perf stat: Save aggr value to first member of prev_raw_counts perf stat: Report summary for interval mode
v4: --- 1. Create runtime_stat_reset.
2. Zero the aggr in perf_counts__reset and use it to reset prev_raw_counts.
3. Move affinity setup and read_counter_cpu to a new function read_affinity_counters. It's only called when stat_config.summary is not set.
v3: --- 1. 'perf stat: Fix wrong per-thread runtime stat for interval mode' is a new patch which fixes an existing issue found in test.
2. We use the prev_raw_counts for summary counts. Drop the summary_counts in v2.
3. Fix some issues.
v2: --- Rebase to perf/core branch
Jin Yao (5): perf stat: Fix wrong per-thread runtime stat for interval mode perf counts: Reset prev_raw_counts counts perf stat: Copy counts from prev_raw_counts to evsel->counts perf stat: Save aggr value to first member of prev_raw_counts perf stat: Report summary for interval mode
tools/perf/builtin-stat.c | 101 +++++++++++++++++++++++++------------- tools/perf/util/counts.c | 4 +- tools/perf/util/counts.h | 1 + tools/perf/util/stat.c | 53 +++++++++++++++++--- tools/perf/util/stat.h | 3 ++ 5 files changed, 122 insertions(+), 40 deletions(-)
-- 2.17.1
| |