Public bug reported:
PROBLEM:
While trying to monitor the ipc group for using perf-stat tool, despite it
being supported, I get the following errors:
$ sudo perf list | grep ipc
ipc
ipc_rate
retired_ipc
spec_ipc
$ sudo -S perf stat -a -M ipc -- sudo -S stress-ng --cpu 0 -t 10s
Error:
The sys_perf_event_open() syscall returned with 22 (Invalid argument) for event
(instructions).
/bin/dmesg | grep -i perf may provide additional information.
$ sudo -S perf stat -a -M ipc_rate -- sudo -S stress-ng --cpu 0 -t 10s
Error:
The sys_perf_event_open() syscall returned with 22 (Invalid argument) for event
(instructions).
/bin/dmesg | grep -i perf may provide additional information.
However, I can get the groups retired_ipc and spec_ipc to work:
$ sudo -S perf stat -a -M retired_ipc -- sudo -S stress-ng --cpu 0 -t 10s
Value 0 contains non-numeric: ' '
Performance counter stats for 'system wide':
96,818,964 INST_RETIRED # 0.58 retired_ipc
166,601,455 CPU_CYCLES
0.013516186 seconds time elapsed
$ sudo -S perf stat -a -M spec_ipc -- sudo -S stress-ng --cpu 0 -t 10s
Value 0 contains non-numeric: ' '
Performance counter stats for 'system wide':
91,053,297 INST_SPEC # 0.58 spec_ipc
156,558,810 CPU_CYCLES
0.009877355 seconds time elapsed
SOLUTION:
Please accept the pull request which cherry-picks the following two upstream
commits:
d43f5491210197196458c1454f2be0eb66d3e4d1 perf vendor events arm64: Update
stall_slot workaround
for N2 r0p3
4473949074c35072f598bd525ae51d5455f05745 perf vendor events arm64: Update N2
and V2 metrics and
events using Arm telemetry repo
** Affects: linux-nvidia-6.5 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2063461
Title:
Perf-stat tool does not support ipc and ipc_rate monitoring on NVIDIA
Grace system
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