[RFC PATCH 3/3 v3] perf: Update perf tool to monitor uncore events

Lin Ming
2010-12-02T05:18:01Z

Uncore events are monitored with raw events with "ru" prefix("u" for uncore).
Note that, per-task uncore event is not allowed.

$ ./perf stat -e ru0101 -- ls
No permission to collect stats.
Consider tweaking /proc/sys/kernel/perf_event_paranoid.

./perf stat -a -C 0 -e ru0101 -- ls

Performance counter stats for 'ls':

949585 raw 0x101

0.001741513 seconds time elapsed

TODO:

- Add a new sub-command for uncore events statistics.
For example, perf package -p <package-id> -e <event>

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
---
tools/perf/util/parse-events.c | 14 ++++++++++----
1 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 73215e7..81df119 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -278,7 +278,7 @@ const char *__event_name(int type, u64 config)
{
static char buf[32];

- if (type == PERF_TYPE_RAW) {
+ if (type == PERF_TYPE_RAW || type == PERF_TYPE_UNCORE) {
sprintf(buf, "raw 0x%llx", config);
return buf;
}
@@ -659,14 +659,20 @@ parse_raw_event(const char **strp, struct perf_event_attr *attr)
{
const char *str = *strp;
u64 config;
+ int uncore = 0;
int n;

if (*str != 'r')
return EVT_FAILED;
- n = hex2u64(str + 1, &config);
+ if (*(str+1) == 'u')
+ uncore = 1;
+ n = hex2u64(str + 1 + uncore, &config);
if (n > 0) {
- *strp = str + n + 1;
- attr->type = PERF_TYPE_RAW;
+ *strp = str + n + 1 + uncore;
+ if (!uncore)
+ attr->type = PERF_TYPE_RAW;
+ else
+ attr->type = PERF_TYPE_UNCORE;
attr->config = config;
return EVT_HANDLED;
}
--
1.5.3