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| author | Kajol Jain <kjain@linux.ibm.com> | 2024-11-18 12:41:14 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2024-11-19 04:11:30 +0100 |
| commit | f26f9933e3e31b2117b804b6b8932388db88a131 (patch) | |
| tree | cca45a6dd146b18e165bf36d208c10b8b0895748 /samples/qmi | |
| parent | powerpc/kvm: Add vpa latency counters to kvm_vcpu_arch (diff) | |
| download | linux-f26f9933e3e31b2117b804b6b8932388db88a131.tar.xz linux-f26f9933e3e31b2117b804b6b8932388db88a131.zip | |
powerpc/perf: Add per-task/process monitoring to vpa_pmu driver
Enhance the vpa_pmu driver with a feature to observe context switch
latency event for both per-task (tid) and per-pid (pid) option.
Couple of new helper functions are added to hide the abstraction of
reading the context switch latency counter from kvm_vcpu_arch struct
and these helper functions are defined in the "kvm/book3s_hv.c".
"PERF_ATTACH_TASK" flag is used to decide whether to read the counter
values from lppaca or kvm_vcpu_arch struct.
Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Co-developed-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://patch.msgid.link/20241118114114.208964-4-kjain@linux.ibm.com
Diffstat (limited to 'samples/qmi')
0 files changed, 0 insertions, 0 deletions