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Subject[RFC PATCH 3/3 v2] perf: Update perf tool to monitor uncore events
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Date
Uncore events are monitored with raw events with "ru" prefix("u" for uncore).

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

Performance counter stats for 'ls':

1033791 raw 0x101

0.003027583 seconds time elapsed

$ sudo ./perf top -e ru0101

--------------------------------------------------------------------------------------------------------------------
PerfTop: 22 irqs/sec kernel:68.2% exact: 0.0% [1000Hz raw 0x101], (all, 8 CPUs)
--------------------------------------------------------------------------------------------------------------------

samples pcnt function DSO
_______ _____ ______________________ ____________________________________

8.00 18.6% kallsyms_expand_symbol [kernel.kallsyms]
5.00 11.6% rb_next /home/mlin/linux-2.6/tools/perf/perf
5.00 11.6% clear_page_c [kernel.kallsyms]

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 898aa94..b03457a 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;
}
@@ -655,14 +655,20 @@ 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;
}
--
1.7.2.3






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