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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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