summaryrefslogtreecommitdiff
path: root/tools/perf/Documentation
diff options
context:
space:
mode:
authorAlexander Yarygin <yarygin@linux.vnet.ibm.com>2014-07-03 18:29:07 +0400
committerArnaldo Carvalho de Melo <acme@redhat.com>2014-07-16 17:57:33 -0300
commit3be8e2a0a53c3179a44a933614f6a893da0b5c19 (patch)
tree7f2ebeed37634cfcf46244e80ad1c1c90642e389 /tools/perf/Documentation
parent54c801ff71ba9c9ae41871e226b9d846ff9c6bab (diff)
perf kvm: Add stat support on s390
On s390, the vmexit event has a tree-like structure: between exit_event_begin and exit_event_end several other events may happen and with each of them refining the previous ones. This patch adds a decoder for such events to the generic code and also the files <asm/kvm_perf.h> and kvm-stat.c for s390. Commands 'perf kvm stat record', 'report' and 'live' are supported. Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1404397747-20939-5-git-send-email-yarygin@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation')
-rw-r--r--tools/perf/Documentation/perf-kvm.txt16
1 files changed, 9 insertions, 7 deletions
diff --git a/tools/perf/Documentation/perf-kvm.txt b/tools/perf/Documentation/perf-kvm.txt
index 52276a6d2b75..6e689dc89a2f 100644
--- a/tools/perf/Documentation/perf-kvm.txt
+++ b/tools/perf/Documentation/perf-kvm.txt
@@ -51,9 +51,9 @@ There are a couple of variants of perf kvm:
'perf kvm stat <command>' to run a command and gather performance counter
statistics.
Especially, perf 'kvm stat record/report' generates a statistical analysis
- of KVM events. Currently, vmexit, mmio and ioport events are supported.
- 'perf kvm stat record <command>' records kvm events and the events between
- start and end <command>.
+ of KVM events. Currently, vmexit, mmio (x86 only) and ioport (x86 only)
+ events are supported. 'perf kvm stat record <command>' records kvm events
+ and the events between start and end <command>.
And this command produces a file which contains tracing results of kvm
events.
@@ -103,8 +103,8 @@ STAT REPORT OPTIONS
analyze events which occures on this vcpu. (default: all vcpus)
--event=<value>::
- event to be analyzed. Possible values: vmexit, mmio, ioport.
- (default: vmexit)
+ event to be analyzed. Possible values: vmexit, mmio (x86 only),
+ ioport (x86 only). (default: vmexit)
-k::
--key=<value>::
Sorting key. Possible values: sample (default, sort by samples
@@ -138,7 +138,8 @@ STAT LIVE OPTIONS
--event=<value>::
- event to be analyzed. Possible values: vmexit, mmio, ioport.
+ event to be analyzed. Possible values: vmexit,
+ mmio (x86 only), ioport (x86 only).
(default: vmexit)
-k::
@@ -147,7 +148,8 @@ STAT LIVE OPTIONS
number), time (sort by average time).
--duration=<value>::
- Show events other than HLT that take longer than duration usecs.
+ Show events other than HLT (x86 only) or Wait state (s390 only)
+ that take longer than duration usecs.
SEE ALSO
--------