aboutsummaryrefslogtreecommitdiff
path: root/tools/arch/x86
diff options
context:
space:
mode:
authorGravatar Thomas Richter <tmricht@linux.ibm.com> 2023-03-16 08:49:46 +0100
committerGravatar Arnaldo Carvalho de Melo <acme@redhat.com> 2023-04-04 09:39:55 -0300
commit51ea4cb96f35ae2f31d45d9a0dbf30da13bbe441 (patch)
treed3df921c57ddeb13919438ae195ceb7060b32af9 /tools/arch/x86
parentperf tests test_bridge_fdb_stress.sh: Fix redirection of stderr to stdin (diff)
downloadlinux-51ea4cb96f35ae2f31d45d9a0dbf30da13bbe441.tar.gz
linux-51ea4cb96f35ae2f31d45d9a0dbf30da13bbe441.tar.bz2
linux-51ea4cb96f35ae2f31d45d9a0dbf30da13bbe441.zip
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>
Diffstat (limited to 'tools/arch/x86')
0 files changed, 0 insertions, 0 deletions