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authorSonny Rao <sonnyrao@linux.vnet.ibm.com>2010-10-14 20:51:00 -0500
committerArnaldo Carvalho de Melo <acme@redhat.com>2010-10-23 15:31:20 -0200
commitffec516976f64b4e3e59ba1bb8a5020008cc678a (patch)
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parent8bfb5e7d6a14b29cffddd113f4b0be7d9aafc1e8 (diff)
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perf tools: Document event modifiers
Existing documentation doesn't discuss event modifiers, so add a description of what's currently possible to the documentation of perf-list. Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Robert Richter <robert.richter@amd.com> LKML-Reference: <1287107460-12112-1-git-send-email-sonnyrao@linux.vnet.ibm.com> Signed-off-by: Sonny Rao <sonnyrao@linux.vnet.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/Documentation/perf-list.txt17
1 files changed, 17 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-list.txt b/tools/perf/Documentation/perf-list.txt
index 43e3dd284b9..399751befee 100644
--- a/tools/perf/Documentation/perf-list.txt
+++ b/tools/perf/Documentation/perf-list.txt
@@ -15,6 +15,23 @@ DESCRIPTION
This command displays the symbolic event types which can be selected in the
various perf commands with the -e option.
+EVENT MODIFIERS
+---------------
+
+Events can optionally have a modifer by appending a colon and one or
+more modifiers. Modifiers allow the user to restrict when events are
+counted with 'u' for user-space, 'k' for kernel, 'h' for hypervisor.
+
+The 'p' modifier can be used for specifying how precise the instruction
+address should be. The 'p' modifier is currently only implemented for
+Intel PEBS and can be specified multiple times:
+ 0 - SAMPLE_IP can have arbitrary skid
+ 1 - SAMPLE_IP must have constant skid
+ 2 - SAMPLE_IP requested to have 0 skid
+ 3 - SAMPLE_IP must have 0 skid
+
+The PEBS implementation now supports up to 2.
+
RAW HARDWARE EVENT DESCRIPTOR
-----------------------------
Even when an event is not available in a symbolic form within perf right now,