Breno - it is not clear to me to which patches you refer. I found these
patches in linux-next:
perf kvm/{x86,s390}: Remove dependency on uapi/kvm_perf.h
perf kvm/{x86,s390}: Remove const from kvm_events_tp
perf kvm/powerpc: Port perf kvm stat to powerpc
perf kvm/powerpc: Add support for HCALL reasons
** Also affects: linux (Ubuntu Xenial)
Importance: Undecided
Assignee: Taco Screen team (taco-screen-team)
Status: New
** Changed in: linux (Ubuntu Xenial)
Status: New => In Progress
** Changed in: linux (Ubuntu Xenial)
Assignee: Taco Screen team (taco-screen-team) => Tim Gardner (timg-tpi)
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https://bugs.launchpad.net/bugs/1521678
Title:
perf enahancements for ppc64
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Xenial:
In Progress
Bug description:
perf kvm stat record/report is not supported on powerpc currently.
With perf kvm stat record/report analysis of kvm exit events and
hypervisor calls can be done. The statistics for these events can be
shown individually for each running VM in the host and can be very
useful in giving an idea of the performance of a VM under a certain
workload.
This can show how many number of KVM exits have happened during a
certain period of time. Along with the total number of exits, all the
exits are grouped according to their specific exit reasons. Also,
frequency for individual exit reasons is shown. Same can be done with
hypervisor calls too.
Updating this with two more features :
- perf intr regs sampling support. Patches are currently in v3.
https://lkml.org/lkml/2015/11/3/25
- Guest symbol resolution:
To enable perf kvm record for powerpc, we need to sample the instruction
pointer from kvm guest_exit tracepoint. The patches for this feature are
currently being sent.
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