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authorFrederic Weisbecker <fweisbec@gmail.com>2009-08-13 10:27:18 +0200
committerIngo Molnar <mingo@elte.hu>2009-08-13 10:37:25 +0200
commit3a9f131fb00b8ac5950a11ad1599e45edfb5ae44 (patch)
tree35e2b425a82c6c160a18554fdd9329618abecc4f
parent28402971d869e26271b25301011f667d3a5640c3 (diff)
perf tools: Add a per tracepoint counter attribute to get raw sample
Add a new flag field while opening a tracepoint perf counter: -e tracepoint_subsystem:tracepoint_name:flags This is intended to be generic although for now it only supports the r[e[c[o[r[d]]]]] flag: ./perf record -e workqueue:workqueue_insertion:record ./perf record -e workqueue:workqueue_insertion:r will have the same effect: enabling the raw samples record for the given tracepoint counter. In the future, we may want to support further flags, separated by commas. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Mike Galbraith <efault@gmx.de> LKML-Reference: <1250152039-7284-1-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--tools/perf/builtin-record.c2
-rw-r--r--tools/perf/util/parse-events.c10
2 files changed, 11 insertions, 1 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index de76008fbaa..78adc47da86 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -398,7 +398,7 @@ static void create_counter(int counter, int cpu, pid_t pid)
PERF_FORMAT_TOTAL_TIME_RUNNING |
PERF_FORMAT_ID;
- attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
+ attr->sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID;
if (freq) {
attr->sample_type |= PERF_SAMPLE_PERIOD;
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 4858d83b3b6..04417840878 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -379,6 +379,7 @@ static int parse_tracepoint_event(const char **strp,
struct perf_counter_attr *attr)
{
const char *evt_name;
+ char *flags;
char sys_name[MAX_EVENT_LENGTH];
char id_buf[4];
int fd;
@@ -400,6 +401,15 @@ static int parse_tracepoint_event(const char **strp,
strncpy(sys_name, *strp, sys_length);
sys_name[sys_length] = '\0';
evt_name = evt_name + 1;
+
+ flags = strchr(evt_name, ':');
+ if (flags) {
+ *flags = '\0';
+ flags++;
+ if (!strncmp(flags, "record", strlen(flags)))
+ attr->sample_type |= PERF_SAMPLE_RAW;
+ }
+
evt_length = strlen(evt_name);
if (evt_length >= MAX_EVENT_LENGTH)
return 0;