[tip:perf/pebs] perf: Add attr->precise support to raw event parsing

tip-bot for Peter Zijlstra
2010-03-10T13:19:41Z

Commit-ID: 69fef0d2e2c2c049ef4207a52e78b50d527bd85a
Gitweb: http://git.kernel.org/tip/69fef0d2e2c2c049ef4207a52e78b50d527bd85a
Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
AuthorDate: Thu, 4 Mar 2010 13:57:24 +0100
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Wed, 10 Mar 2010 13:23:32 +0100

perf: Add attr->precise support to raw event parsing

Minimal userspace interface to the new 'precise' events flag.

Can be used like "perf top -e r00c0p" which will use PEBS to sample
retired instructions.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: paulus@samba.org
Cc: eranian@google.com
Cc: robert.richter@amd.com
Cc: fweisbec@gmail.com
LKML-Reference: <20100304140100.468665803@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
tools/perf/util/parse-events.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 05d0c5c..a201445 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -656,6 +656,10 @@ parse_raw_event(const char **strp, struct perf_event_attr *attr)
return EVT_FAILED;
n = hex2u64(str + 1, &config);
if (n > 0) {
+ if (str[n+1] == 'p') {
+ attr->precise = 1;
+ n++;
+ }
*strp = str + n + 1;
attr->type = PERF_TYPE_RAW;
attr->config = config;