On Tue, Jan 19, 2016 at 06:26:43PM -0800, Andi Kleen wrote: > [v5: Fix mainly bisect problems. No regressions introduced by one > patch and fixed again later. Some minor fixes in addition] > [v6: Fix running/noise printing patch.] > [v7: Reorder and merge two patches to avoid a bisect hole where unsupported > was > printed as 0] > [v8: Minor fixes for review feedback. See changelog in patches.] > [v9: Fix newline bug. Add support for -A for --metric-only] > > Currently perf stat does not support printing computed metrics for interval > (-I xxx) > or CSV (-x,) mode. For example IPC or TSX metrics over time are quite useful > to know. > > This patch implements them. The main obstacle was that the > metrics printing was all open coded all over the metrics computation code. > The second patch refactors the metrics printing to work through call backs > that > can be more easily changed. This also cleans up the metrics printing > significantly. > The indentation is now handled through printf, no more need to manually count > spaces. > > Then based on that it implements metrics printing for CSV and interval mode, > and finally a --metric-only mode. > > Example output: > > % perf stat -I1000 -a sleep 1 > # time counts unit events metric > multiplex > 1.001301370 12020.049593 task-clock (msec) > (100.00%) > 1.001301370 3,952 context-switches # 0.329 > K/sec (100.00%) > 1.001301370 69 cpu-migrations # 0.006 > K/sec (100.00%) > 1.001301370 76 page-faults # 0.006 > K/sec > 1.001301370 386,582,789 cycles # 0.032 > GHz (100.00%) > 1.001301370 716,441,544 stalled-cycles-frontend # 185.33% > frontend cycles idle (100.00%) > 1.001301370 <not supported> stalled-cycles-backend > 1.001301370 101,751,678 instructions # 0.26 > insn per cycle > 1.001301370 # 7.04 > stalled cycles per insn (100.00%) > 1.001301370 20,914,692 branches # 1.740 > M/sec (100.00%) > 1.001301370 1,943,630 branch-misses # 9.29% > of all branches > > CSV mode > > % perf stat -x, -I1000 -a sleep 1 > 1.000852081,12016.143006,,task-clock > 1.000852081,4457,,context-switches,12015168277,100.00,0.371,K/sec > 1.000852081,50,,cpu-migrations,12014024424,100.00,0.004,K/sec > 1.000852081,76,,page-faults,12013076716,100.00,0.006,K/sec > 1.000852081,515854373,,cycles,12011235336,100.00,0.043,GHz > > 1.000852081,1030742150,,stalled-cycles-frontend,12010984057,100.00,199.81,frontend > cycles idle > 1.000852081,<not supported>,,stalled-cycles-backend,0,100.00 > 1.000852081,116782495,,instructions,12011130729,100.00,0.23,insn per > cycle > 1.000852081,,,,12011130729,100.00,8.83,stalled cycles per insn > 1.000852081,23748237,,branches,12010745125,100.00,1.976,M/sec > 1.000852081,1976560,,branch-misses,12010501884,100.00,8.32,of all > branches > > Available in > git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-misc-2.6 > perf/stat-metrics-13
this looks like great test candidate for the testing suite Michael is working on.. CC-ed thanks, jirka
