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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>
This commit is contained in:
Peter Zijlstra 2010-03-04 13:57:24 +01:00 committed by Ingo Molnar
parent ca037701a0
commit 69fef0d2e2
1 changed files with 4 additions and 0 deletions
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4
tools/perf/util/parse-events.c
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@ -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;