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Yang Jihong authored
Implements softirq latency function. Test cases: # perf kwork -k softirq lat Kwork Name | Cpu | Avg delay | Count | Max delay | Max delay start | Max delay end | -------------------------------------------------------------------------------------------------------------------------------- (s)TIMER:1 | 0006 | 1.048 ms | 1 | 1.048 ms | 44000.829759 s | 44000.830807 s | (s)TIMER:1 | 0001 | 1.008 ms | 4 | 3.434 ms | 43997.662069 s | 43997.665503 s | (s)RCU:9 | 0006 | 0.675 ms | 7 | 1.328 ms | 43997.670304 s | 43997.671632 s | (s)RCU:9 | 0000 | 0.414 ms | 701 | 3.996 ms | 43997.661170 s | 43997.665167 s | (s)RCU:9 | 0005 | 0.245 ms | 88 | 1.866 ms | 43997.683105 s | 43997.684971 s | (s)SCHED:7 | 0000 | 0.158 ms | 677 | 2.639 ms | 44004.785716 s | 44004.788355 s | ... <SNIP> ... (s)RCU:9 | 0002 | 0.141 ms | 932 | 1.662 ms | 44005.010206 s | 44005.011868 s | (s)RCU:9 | 0003 | 0.129 ms | 2193 | 1.507 ms | 44006.010208 s | 44006.011715 s | (s)TIMER:1 | 0005 | 0.128 ms | 1 | 0.128 ms | 44007.820346 s | 44007.820474 s | (s)SCHED:7 | 0002 | 0.040 ms | 1731 | 0.211 ms | 44005.009237 s | 44005.009447 s | -------------------------------------------------------------------------------------------------------------------------------- # perf kwork -k softirq lat -C 1,2 Kwork Name | Cpu | Avg delay | Count | Max delay | Max delay start | Max delay end | -------------------------------------------------------------------------------------------------------------------------------- (s)TIMER:1 | 0001 | 1.008 ms | 4 | 3.434 ms | 43997.662069 s | 43997.665503 s | (s)RCU:9 | 0001 | 0.216 ms | 1619 | 3.659 ms | 43997.662069 s | 43997.665727 s | (s)RCU:9 | 0002 | 0.141 ms | 932 | 1.662 ms | 44005.010206 s | 44005.011868 s | (s)NET_RX:3 | 0002 | 0.106 ms | 5 | 0.163 ms | 44005.012255 s | 44005.012418 s | (s)TIMER:1 | 0002 | 0.084 ms | 9 | 0.114 ms | 44005.009168 s | 44005.009282 s | (s)SCHED:7 | 0001 | 0.049 ms | 655 | 0.837 ms | 44005.707998 s | 44005.708835 s | (s)SCHED:7 | 0002 | 0.040 ms | 1731 | 0.211 ms | 44005.009237 s | 44005.009447 s | -------------------------------------------------------------------------------------------------------------------------------- # perf kwork -k softirq lat -n RCU Kwork Name | Cpu | Avg delay | Count | Max delay | Max delay start | Max delay end | -------------------------------------------------------------------------------------------------------------------------------- (s)RCU:9 | 0006 | 0.675 ms | 7 | 1.328 ms | 43997.670304 s | 43997.671632 s | (s)RCU:9 | 0000 | 0.414 ms | 701 | 3.996 ms | 43997.661170 s | 43997.665167 s | (s)RCU:9 | 0005 | 0.245 ms | 88 | 1.866 ms | 43997.683105 s | 43997.684971 s | (s)RCU:9 | 0004 | 0.237 ms | 26 | 0.792 ms | 43997.683018 s | 43997.683810 s | (s)RCU:9 | 0007 | 0.217 ms | 140 | 1.335 ms | 43997.671080 s | 43997.672415 s | (s)RCU:9 | 0001 | 0.216 ms | 1619 | 3.659 ms | 43997.662069 s | 43997.665727 s | (s)RCU:9 | 0002 | 0.141 ms | 932 | 1.662 ms | 44005.010206 s | 44005.011868 s | (s)RCU:9 | 0003 | 0.129 ms | 2193 | 1.507 ms | 44006.010208 s | 44006.011715 s | -------------------------------------------------------------------------------------------------------------------------------- # perf kwork -k softirq lat -s count,avg -n RCU Kwork Name | Cpu | Avg delay | Count | Max delay | Max delay start | Max delay end | -------------------------------------------------------------------------------------------------------------------------------- (s)RCU:9 | 0003 | 0.129 ms | 2193 | 1.507 ms | 44006.010208 s | 44006.011715 s | (s)RCU:9 | 0001 | 0.216 ms | 1619 | 3.659 ms | 43997.662069 s | 43997.665727 s | (s)RCU:9 | 0002 | 0.141 ms | 932 | 1.662 ms | 44005.010206 s | 44005.011868 s | (s)RCU:9 | 0000 | 0.414 ms | 701 | 3.996 ms | 43997.661170 s | 43997.665167 s | (s)RCU:9 | 0007 | 0.217 ms | 140 | 1.335 ms | 43997.671080 s | 43997.672415 s | (s)RCU:9 | 0005 | 0.245 ms | 88 | 1.866 ms | 43997.683105 s | 43997.684971 s | (s)RCU:9 | 0004 | 0.237 ms | 26 | 0.792 ms | 43997.683018 s | 43997.683810 s | (s)RCU:9 | 0006 | 0.675 ms | 7 | 1.328 ms | 43997.670304 s | 43997.671632 s | -------------------------------------------------------------------------------------------------------------------------------- # perf kwork -k softirq lat --time 43997, Kwork Name | Cpu | Avg delay | Count | Max delay | Max delay start | Max delay end | -------------------------------------------------------------------------------------------------------------------------------- (s)TIMER:1 | 0006 | 1.048 ms | 1 | 1.048 ms | 44000.829759 s | 44000.830807 s | (s)TIMER:1 | 0001 | 1.008 ms | 4 | 3.434 ms | 43997.662069 s | 43997.665503 s | (s)RCU:9 | 0006 | 0.675 ms | 7 | 1.328 ms | 43997.670304 s | 43997.671632 s | (s)RCU:9 | 0000 | 0.414 ms | 701 | 3.996 ms | 43997.661170 s | 43997.665167 s | (s)TIMER:1 | 0004 | 0.083 ms | 21 | 0.127 ms | 44004.969171 s | 44004.969298 s | ... <SNIP> ... (s)SCHED:7 | 0005 | 0.050 ms | 4 | 0.086 ms | 43997.684852 s | 43997.684938 s | (s)SCHED:7 | 0001 | 0.049 ms | 655 | 0.837 ms | 44005.707998 s | 44005.708835 s | (s)SCHED:7 | 0007 | 0.044 ms | 171 | 0.077 ms | 43997.943265 s | 43997.943342 s | (s)SCHED:7 | 0002 | 0.040 ms | 1731 | 0.211 ms | 44005.009237 s | 44005.009447 s | -------------------------------------------------------------------------------------------------------------------------------- Signed-off-by:Yang Jihong <yangjihong1@huawei.com> Tested-by:
Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Clarke <pc@us.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20220709015033.38326-12-yangjihong1@huawei.comSigned-off-by:
19807bba
