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| author | Madhavan Srinivasan <maddy@linux.ibm.com> | 2021-04-29 10:32:08 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-06-29 19:42:41 +1000 |
| commit | 5969e0c1c7e2132d8b2cf80168072b1195ddce46 (patch) | |
| tree | 216808b242c1c1429aa32d6ec5d0246d140025b5 /tools/perf/scripts/python | |
| parent | powerpc/pseries/iommu: Print ibm,query-pe-dma-windows parameters (diff) | |
| download | linux-5969e0c1c7e2132d8b2cf80168072b1195ddce46.tar.gz linux-5969e0c1c7e2132d8b2cf80168072b1195ddce46.zip | |
powerpc/perf: Update MMCR2 to support event exclude_idle
struct perf_event_attr supports exclude counting of idle task.
This is sent to kernel via perf_event_attr.exclude_idle and
in perf tool, user can use ":I" event modifier to enable this
for specific event.
Monitor Mode Control Register 2 (MMCR2) SPR has control bits
for each PMCs to freeze counting based on the Control Register
CTRL[RUN] state. CTRL[RUN] is not set when idle task is
running. Patch adds a check for event attr.exclude_idle to
set MMCR2[FCnWAIT] bit.
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210429050208.266619-1-maddy@linux.ibm.com
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions