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| author | Kajol Jain <kjain@linux.ibm.com> | 2024-11-18 14:41:13 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2024-11-19 06:11:21 +0300 |
| commit | 5f0b48c6a168994cc09d02888c2d939eba2af193 (patch) | |
| tree | 6ec21e1f7a59b6eaadf463c6c5ecf03c715ad388 /rust/helpers/helpers.c | |
| parent | 4ae0b32ecee730a41f65eb122bbb40fda7dca34a (diff) | |
| download | linux-5f0b48c6a168994cc09d02888c2d939eba2af193.tar.xz | |
powerpc/kvm: Add vpa latency counters to kvm_vcpu_arch
Commit e1f288d2f9c69 ("KVM: PPC: Book3S HV nestedv2: Add support
for reading VPA counters for pseries guests") introduced support for new
Virtual Process Area(VPA) based software counters. These counters are
useful when observing context switch latency of L1 <-> L2. It also
added access to counters in lppaca, which is good enough to understand
latency details per-cpu level. But to extend and aggregate
per-process level(qemu) or per-pid/tid level(vcpu), these
counters also needs to be added as part of kvm_vcpu_arch struct.
Additional code added to update these new kvm_vcpu_arch variables
in do_trace_nested_cs_time function.
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/20241118114114.208964-3-kjain@linux.ibm.com
Diffstat (limited to 'rust/helpers/helpers.c')
0 files changed, 0 insertions, 0 deletions