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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-05-05 11:20:05 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-05-05 11:20:05 -0300 |
| commit | 9e32a3cb0661a6a30e0fd2b77ce85293805e6337 (patch) | |
| tree | b576e0ccd70d8c563f6340f6f2b71c433b9223b3 /tools/perf/Documentation/perf-list.txt | |
| parent | db620b1c2fb172346dc54eb62bba9b4a117d173b (diff) | |
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.txt | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-list.txt b/tools/perf/Documentation/perf-list.txt index 8290b942266..ad765e0b886 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 |