1. 26 Sep, 2012 11 commits
  2. 25 Sep, 2012 2 commits
  3. 24 Sep, 2012 25 commits
  4. 21 Sep, 2012 2 commits
    • Xiao Guangrong's avatar
      perf kvm: Events analysis tool · bcf6edcd
      Xiao Guangrong authored
      Add 'perf kvm stat' support to analyze kvm vmexit/mmio/ioport smartly
      
      Usage:
      - kvm stat
        run a command and gather performance counter statistics, it is the alias of
        perf stat
      
      - trace kvm events:
        perf kvm stat record, or, if other tracepoints are interesting as well, we
        can append the events like this:
        perf kvm stat record -e timer:* -a
      
        If many guests are running, we can track the specified guest by using -p or
        --pid, -a is used to track events generated by all guests.
      
      - show the result:
        perf kvm stat report
      
      The output example is following:
      13005
      13059
      
      total 2 guests are running on the host
      
      Then, track the guest whose pid is 13059:
      ^C[ perf record: Woken up 1 times to write data ]
      [ perf record: Captured and wrote 0.253 MB perf.data.guest (~11065 samples) ]
      
      See the vmexit events:
      
      Analyze events for all VCPUs:
      
                   VM-EXIT    Samples  Samples%     Time%         Avg time
      
               APIC_ACCESS        460    70.55%     0.01%     22.44us ( +-   1.75% )
                       HLT         93    14.26%    99.98% 832077.26us ( +-  10.42% )
        EXTERNAL_INTERRUPT         64     9.82%     0.00%     35.35us ( +-  14.21% )
         PENDING_INTERRUPT         24     3.68%     0.00%      9.29us ( +-  31.39% )
                 CR_ACCESS          7     1.07%     0.00%      8.12us ( +-   5.76% )
            IO_INSTRUCTION          3     0.46%     0.00%     18.00us ( +-  11.79% )
             EXCEPTION_NMI          1     0.15%     0.00%      5.83us ( +-   -nan% )
      
      Total Samples:652, Total events handled time:77396109.80us.
      
      See the mmio events:
      
      Analyze events for all VCPUs:
      
               MMIO Access    Samples  Samples%     Time%         Avg time
      
              0xfee00380:W        387    84.31%    79.28%      8.29us ( +-   3.32% )
              0xfee00300:W         24     5.23%     9.96%     16.79us ( +-   1.97% )
              0xfee00300:R         24     5.23%     7.83%     13.20us ( +-   3.00% )
              0xfee00310:W         24     5.23%     2.93%      4.94us ( +-   3.84% )
      
      Total Samples:459, Total events handled time:4044.59us.
      
      See the ioport event:
      
      Analyze events for all VCPUs:
      
            IO Port Access    Samples  Samples%     Time%         Avg time
      
               0xc050:POUT          3   100.00%   100.00%     13.75us ( +-  10.83% )
      
      Total Samples:3, Total events handled time:41.26us.
      
      And, --vcpu is used to track the specified vcpu and --key is used to sort the
      result:
      
      Analyze events for VCPU 0:
      
                   VM-EXIT    Samples  Samples%     Time%         Avg time
      
                       HLT         27    13.85%    99.97% 405790.24us ( +-  12.70% )
        EXTERNAL_INTERRUPT         13     6.67%     0.00%     27.94us ( +-  22.26% )
               APIC_ACCESS        146    74.87%     0.03%     21.69us ( +-   2.91% )
            IO_INSTRUCTION          2     1.03%     0.00%     17.77us ( +-  20.56% )
                 CR_ACCESS          2     1.03%     0.00%      8.55us ( +-   6.47% )
         PENDING_INTERRUPT          5     2.56%     0.00%      6.27us ( +-   3.94% )
      
      Total Samples:195, Total events handled time:10959950.90us.
      Signed-off-by: default avatarDong Hao <haodong@linux.vnet.ibm.com>
      Signed-off-by: default avatarRunzhen Wang <runzhen@linux.vnet.ibm.com>
      [ Dong Hao <haodong@linux.vnet.ibm.com>
        Runzhen Wang <runzhen@linux.vnet.ibm.com>:
           - rebase it on current acme's tree
           - fix the compiling-error on i386 ]
      Signed-off-by: default avatarXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
      Acked-by: default avatarDavid Ahern <dsahern@gmail.com>
      Cc: Avi Kivity <avi@redhat.com>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Marcelo Tosatti <mtosatti@redhat.com>
      Cc: kvm@vger.kernel.org
      Cc: Runzhen Wang <runzhen@linux.vnet.ibm.com>
      Link: http://lkml.kernel.org/r/1347870675-31495-4-git-send-email-haodong@linux.vnet.ibm.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      bcf6edcd
    • Xiao Guangrong's avatar
      KVM: x86: Export svm/vmx exit code and vector code to userspace · 26bf264e
      Xiao Guangrong authored
      Exporting KVM exit information to userspace to be consumed by perf.
      Signed-off-by: default avatarDong Hao <haodong@linux.vnet.ibm.com>
      [ Dong Hao <haodong@linux.vnet.ibm.com>: rebase it on acme's git tree ]
      Signed-off-by: default avatarXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
      Acked-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
      Cc: Avi Kivity <avi@redhat.com>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Marcelo Tosatti <mtosatti@redhat.com>
      Cc: kvm@vger.kernel.org
      Cc: Runzhen Wang <runzhen@linux.vnet.ibm.com>
      Link: http://lkml.kernel.org/r/1347870675-31495-2-git-send-email-haodong@linux.vnet.ibm.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      26bf264e