path: root/tools/perf/Documentation/perf-list.txt
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authorSonny Rao <>2010-10-14 20:51:00 -0500
committerArnaldo Carvalho de Melo <>2010-10-23 15:31:20 -0200
commitffec516976f64b4e3e59ba1bb8a5020008cc678a (patch)
tree295c348b1c6c747025093855fda2782df80f6ff7 /tools/perf/Documentation/perf-list.txt
parent8bfb5e7d6a14b29cffddd113f4b0be7d9aafc1e8 (diff)
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 <> Cc: Paul Mackerras <> Cc: Peter Zijlstra <> Cc: Robert Richter <> LKML-Reference: <> Signed-off-by: Sonny Rao <> Signed-off-by: Arnaldo Carvalho de Melo <>
Diffstat (limited to 'tools/perf/Documentation/perf-list.txt')
1 files changed, 17 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-list.txt b/tools/perf/Documentation/perf-list.txt
index 43e3dd284b90..399751befeed 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.
+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.
Even when an event is not available in a symbolic form within perf right now,