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51ea4cb9 |
| 16-Mar-2023 |
Thomas Richter <tmricht@linux.ibm.com> |
perf stat: Suppress warning when using cpum_cf events on s390
Running command perf stat -vv -e cpu_cycles -C0 -- true displays this warning:
Attempting to add event pmu 'cpum_cf' with 'cpu_cycles,
perf stat: Suppress warning when using cpum_cf events on s390
Running command perf stat -vv -e cpu_cycles -C0 -- true displays this warning:
Attempting to add event pmu 'cpum_cf' with 'cpu_cycles,' that may result in non-fatal errors
Make the PMU cpum_cf selectable and avoid this warning. While at it also fix this warning for PMUs pai_crypto and pai_ext.
Output before:
# ./perf stat -vv -e cpu_cycles -C0 -- true Using CPUID IBM,3931,704,A01,3.7,002f Attempting to add event pmu 'cpum_cf' with 'cpu_cycles,' that may result in non-fatal errors After aliases, add event pmu 'cpum_cf' with 'event,' that may result in non-fatal errors cpu_cycles -> cpum_cf/event=0/ Control descriptor is not initialized ------------------------------------------------------------ perf_event_attr: type 10 size 128 config 0x1001 sample_type IDENTIFIER read_format TOTAL_TIME_ENABLED|TOTAL_TIME_RUNNING disabled 1 inherit 1 exclude_guest 1 ------------------------------------------------------------ sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 3 cpu_cycles: 0: 290434 2479172 2479172: cpu_cycles: 290434 2479172 2479172
Performance counter stats for 'CPU(s) 0':
290,434 cpu_cycles
0.002465617 seconds time elapsed #
Now the warning "Attempting to add event pmu 'cpum_cf' ..." does not show up anymore.
Output after: # ./perf stat -vv -e cpu_cycles -C0 -- true Using CPUID IBM,3931,704,A01,3.7,002f After aliases, add event pmu 'cpum_cf' with 'event,' that may result in non-fatal errors cpu_cycles -> cpum_cf/event=0/ Control descriptor is not initialized ....
Performance counter stats for 'CPU(s) 0':
357,023 cpu_cycles
0.002454995 seconds time elapsed #
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Sumanth Korikkar <sumanthk@linux.ibm.com> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Link: https://lore.kernel.org/r/20230316074946.41110-1-tmricht@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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