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SubjectRe: [PATCH 07/22] tools lib traceevent: Add kvm plugin
On Thu, 21 Nov 2013 12:01:05 +0100
Jiri Olsa <jolsa@redhat.com> wrote:

> Backporting kvm plugin.
>
> Backported from Steven Rostedt's trace-cmd repo (HEAD 0f2c2fb):
> git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
>
> This plugin adds field resolving functions for following
> tracepoint events:
> kvm:kvm_exit
> kvm:kvm_emulate_insn
> kvm:kvm_nested_vmexit
> kvm:kvm_nested_vmexit_inject
> kvmmmu:kvm_mmu_get_page
> kvmmmu:kvm_mmu_sync_page
> kvmmmu:kvm_mmu_unsync_page
> kvmmmu:kvm_mmu_zap_page
> kvmmmu:kvm_mmu_prepare_zap_page
>
> The diff of 'perf script' output generated by old and new code:
> (data was generated by 'perf record -e 'kvm:*,kvmmmu:*' -a')
>
> --- script.kvm.old
> +++ script.kvm.new
> qemu-system-x86 17414 [000] 6868.995053: kvm:kvm_exit: reason EPT_VIOLATION rip 0xfff0 info 184 0
> qemu-system-x86 17414 [000] 6868.995109: kvm:kvm_emulate_insn: f0000:c46b:e4 71 (real)
> - qemu-system-x86 3006 [002] 10562.079422: kvmmmu:kvm_mmu_get_page: [FAILED TO PARSE] mmu_valid_gen=0x2 gfn=0 role=122884 root_count=0 unsync=0 created=1
> + qemu-system-x86 3006 [002] 10562.079422: kvmmmu:kvm_mmu_get_page: new sp gfn 0 0/4 q0 direct --- !pge !nxe root 0 sync
> - qemu-system-x86 3006 [002] 10562.080502: kvmmmu:kvm_mmu_prepare_zap_page: [FAILED TO PARSE] mmu_valid_gen=0x2 gfn=0 role=122884 root_count=1 unsync=0
> + qemu-system-x86 3006 [002] 10562.080502: kvmmmu:kvm_mmu_prepare_zap_page: 0/4 q0 direct --- !pge !nxe root 1 sync
> qemu-system-x86 3290 [002] 10708.755312: kvmmmu:fast_page_fault: [FAILED TO PARSE] vcpu_id=0 gva=4094486080 error_code=3 sptep=0xffff88019f1e3670 old_spte=336391285 new_spte=336391287 retry=1
> - insmod 2576 [001] 781.731666: kvmmmu:kvm_mmu_sync_page: [FAILED TO PARSE] mmu_valid_gen=0x1 gfn=2 role=24624 root_count=10 unsync=1
> + insmod 2576 [001] 781.731666: kvmmmu:kvm_mmu_sync_page: 3/0 q0 --- !pge !nxe root 10 unsync
> - insmod 2576 [001] 781.731668: kvmmmu:kvm_mmu_unsync_page: [FAILED TO PARSE] mmu_valid_gen=0x1 gfn=2 role=24624 root_count=10 unsync=1
> + insmod 2576 [001] 781.731668: kvmmmu:kvm_mmu_unsync_page: 3/0 q0 --- !pge !nxe root 10 unsync
>
> Note:
> - kvm_mmu_zap_page is replaced by kvm_mmu_prepare_zap_page
> in current kernel, keeping it for backward compatibility
> - some of the tracepoints keep the same output even with
> the plugin handling: kvm:kvm_exit, kvm:kvm_emulate_insn
> - the 'kvmmmu:fast_page_fault' is still broken because of
> missing is_writable_pte function and is fixed in another patch
> - ommited following tracepoints from backport because
> the output was buggy
> kvm:kvm_nested_vmexit
> kvm:kvm_nested_vmexit_inject
>
> Signed-off-by: Jiri Olsa <jolsa@redhat.com>
> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
> Cc: Frederic Weisbecker <fweisbec@gmail.com>
> Cc: Ingo Molnar <mingo@elte.hu>
> Cc: Namhyung Kim <namhyung@kernel.org>
> Cc: Paul Mackerras <paulus@samba.org>
> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
> Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
> Cc: Steven Rostedt <rostedt@goodmis.org>

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

-- Steve

> Cc: David Ahern <dsahern@gmail.com>
> ---


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