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>

2 files changed, 11 insertions, 1 deletions

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index de76008fbaa2..78adc47da869 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 4858d83b3b67..044178408783 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;