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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>
This commit is contained in:
Frederic Weisbecker 2009-08-13 10:27:18 +02:00 committed by Ingo Molnar
parent 28402971d8
commit 3a9f131fb0
2 changed files with 11 additions and 1 deletions
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2
tools/perf/builtin-record.c
View File

@ -398,7 +398,7 @@ static void create_counter(int counter, int cpu, pid_t pid)
PERF_FORMAT_TOTAL_TIME_RUNNING | PERF_FORMAT_TOTAL_TIME_RUNNING |
PERF_FORMAT_ID; PERF_FORMAT_ID;
attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID; attr->sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID;
if (freq) { if (freq) {
attr->sample_type |= PERF_SAMPLE_PERIOD; attr->sample_type |= PERF_SAMPLE_PERIOD;

10
tools/perf/util/parse-events.c
View File

@ -379,6 +379,7 @@ static int parse_tracepoint_event(const char **strp,
struct perf_counter_attr *attr) struct perf_counter_attr *attr)
{ {
const char *evt_name; const char *evt_name;
char *flags;
char sys_name[MAX_EVENT_LENGTH]; char sys_name[MAX_EVENT_LENGTH];
char id_buf[4]; char id_buf[4];
int fd; int fd;
@ -400,6 +401,15 @@ static int parse_tracepoint_event(const char **strp,
strncpy(sys_name, *strp, sys_length); strncpy(sys_name, *strp, sys_length);
sys_name[sys_length] = '\0'; sys_name[sys_length] = '\0';
evt_name = evt_name + 1; 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); evt_length = strlen(evt_name);
if (evt_length >= MAX_EVENT_LENGTH) if (evt_length >= MAX_EVENT_LENGTH)
return 0; return 0;