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authorArnaldo Carvalho de Melo <acme@redhat.com>2010-05-05 11:20:05 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2010-05-05 11:20:05 -0300
commit9e32a3cb0661a6a30e0fd2b77ce85293805e6337 (patch)
treeb576e0ccd70d8c563f6340f6f2b71c433b9223b3 /tools/perf/Documentation/perf-list.txt
parentdb620b1c2fb172346dc54eb62bba9b4a117d173b (diff)
downloadlinux-9e32a3cb0661a6a30e0fd2b77ce85293805e6337.tar.gz
perf list: Add explanation about raw hardware event descriptors
Using explanation given by Ingo Molnar in the oprofile mailing list. Suggested-by: Nick Black <dank@qemfd.net> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Nick Black <dank@qemfd.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation/perf-list.txt')
-rw-r--r--tools/perf/Documentation/perf-list.txt18
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diff --git a/tools/perf/Documentation/perf-list.txt b/tools/perf/Documentation/perf-list.txt
index 8290b9422668..ad765e0b8860 100644
--- a/tools/perf/Documentation/perf-list.txt
+++ b/tools/perf/Documentation/perf-list.txt
@@ -15,6 +15,24 @@ DESCRIPTION
This command displays the symbolic event types which can be selected in the
various perf commands with the -e option.
+RAW HARDWARE EVENT DESCRIPTOR
+-----------------------------
+Even when an event is not available in a symbolic form within perf right now,
+it can be encoded as <UMASK VALUE><EVENT NUM>, for instance, if the Intel docs
+describe an event as:
+
+ Event Umask Event Mask
+ Num. Value Mnemonic Description Comment
+
+ A8H 01H LSD.UOPS Counts the number of micro-ops Use cmask=1 and
+ delivered by loop stream detector invert to count
+ cycles
+
+raw encoding of 0x1A8 can be used:
+
+ perf stat -e r1a8 -a sleep 1
+ perf record -e r1a8 ...
+
OPTIONS
-------
None