提交 3a9f131f 编写于 作者: F Frederic Weisbecker 提交者: Ingo Molnar

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: NFrederic 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: NIngo Molnar <mingo@elte.hu>
上级 28402971
......@@ -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;
......
......@@ -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;
......
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