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Message-ID: <tip-c171b552a7d316c7e1c3ad6f70a30178dd53e14c@git.kernel.org>
Date: Thu, 15 Oct 2009 09:40:31 GMT
From: tip-bot for Li Zefan <lizf@...fujitsu.com>
To: linux-tip-commits@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
tzanussi@...il.com, lizf@...fujitsu.com, peterz@...radead.org,
fweisbec@...il.com, rostedt@...dmis.org, tglx@...utronix.de,
mingo@...e.hu
Subject: [tip:perf/core] perf trace: Add filter Suppport
Commit-ID: c171b552a7d316c7e1c3ad6f70a30178dd53e14c
Gitweb: http://git.kernel.org/tip/c171b552a7d316c7e1c3ad6f70a30178dd53e14c
Author: Li Zefan <lizf@...fujitsu.com>
AuthorDate: Thu, 15 Oct 2009 11:22:07 +0800
Committer: Ingo Molnar <mingo@...e.hu>
CommitDate: Thu, 15 Oct 2009 11:35:23 +0200
perf trace: Add filter Suppport
Add a new option "--filter <filter_str>" to perf record, and
it should be right after "-e trace_point":
#./perf record -R -f -e irq:irq_handler_entry --filter irq==18
^C
# ./perf trace
perf-4303 ... irq_handler_entry: irq=18 handler=eth0
init-0 ... irq_handler_entry: irq=18 handler=eth0
init-0 ... irq_handler_entry: irq=18 handler=eth0
init-0 ... irq_handler_entry: irq=18 handler=eth0
init-0 ... irq_handler_entry: irq=18 handler=eth0
See Documentation/trace/events.txt for the syntax of filter
expressions.
Signed-off-by: Li Zefan <lizf@...fujitsu.com>
Acked-by: Peter Zijlstra <peterz@...radead.org>
Acked-by: Frederic Weisbecker <fweisbec@...il.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Tom Zanussi <tzanussi@...il.com>
LKML-Reference: <4AD6955F.90602@...fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
tools/perf/builtin-record.c | 15 ++++++++++++++-
tools/perf/util/parse-events.c | 26 ++++++++++++++++++++++++--
tools/perf/util/parse-events.h | 2 ++
3 files changed, 40 insertions(+), 3 deletions(-)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 4e3a374..8b2c860 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -374,9 +374,11 @@ static struct perf_header_attr *get_header_attr(struct perf_event_attr *a, int n
static void create_counter(int counter, int cpu, pid_t pid)
{
+ char *filter = filters[counter];
struct perf_event_attr *attr = attrs + counter;
struct perf_header_attr *h_attr;
int track = !counter; /* only the first counter needs these */
+ int ret;
struct {
u64 count;
u64 time_enabled;
@@ -479,7 +481,6 @@ try_again:
multiplex_fd = fd[nr_cpu][counter];
if (multiplex && fd[nr_cpu][counter] != multiplex_fd) {
- int ret;
ret = ioctl(fd[nr_cpu][counter], PERF_EVENT_IOC_SET_OUTPUT, multiplex_fd);
assert(ret != -1);
@@ -499,6 +500,16 @@ try_again:
}
}
+ if (filter != NULL) {
+ ret = ioctl(fd[nr_cpu][counter],
+ PERF_EVENT_IOC_SET_FILTER, filter);
+ if (ret) {
+ error("failed to set filter with %d (%s)\n", errno,
+ strerror(errno));
+ exit(-1);
+ }
+ }
+
ioctl(fd[nr_cpu][counter], PERF_EVENT_IOC_ENABLE);
}
@@ -676,6 +687,8 @@ static const struct option options[] = {
OPT_CALLBACK('e', "event", NULL, "event",
"event selector. use 'perf list' to list available events",
parse_events),
+ OPT_CALLBACK(0, "filter", NULL, "filter",
+ "event filter", parse_filter),
OPT_INTEGER('p', "pid", &target_pid,
"record events on existing pid"),
OPT_INTEGER('r', "realtime", &realtime_prio,
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 8cfb48c..b097570 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -8,9 +8,10 @@
#include "cache.h"
#include "header.h"
-int nr_counters;
+int nr_counters;
struct perf_event_attr attrs[MAX_COUNTERS];
+char *filters[MAX_COUNTERS];
struct event_symbol {
u8 type;
@@ -708,7 +709,6 @@ static void store_event_type(const char *orgname)
perf_header__push_event(id, orgname);
}
-
int parse_events(const struct option *opt __used, const char *str, int unset __used)
{
struct perf_event_attr attr;
@@ -745,6 +745,28 @@ int parse_events(const struct option *opt __used, const char *str, int unset __u
return 0;
}
+int parse_filter(const struct option *opt __used, const char *str,
+ int unset __used)
+{
+ int i = nr_counters - 1;
+ int len = strlen(str);
+
+ if (i < 0 || attrs[i].type != PERF_TYPE_TRACEPOINT) {
+ fprintf(stderr,
+ "-F option should follow a -e tracepoint option\n");
+ return -1;
+ }
+
+ filters[i] = malloc(len + 1);
+ if (!filters[i]) {
+ fprintf(stderr, "not enough memory to hold filter string\n");
+ return -1;
+ }
+ strcpy(filters[i], str);
+
+ return 0;
+}
+
static const char * const event_type_descriptors[] = {
"",
"Hardware event",
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index 8626a43..b8c1f64 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -17,11 +17,13 @@ extern struct tracepoint_path *tracepoint_id_to_path(u64 config);
extern int nr_counters;
extern struct perf_event_attr attrs[MAX_COUNTERS];
+extern char *filters[MAX_COUNTERS];
extern const char *event_name(int ctr);
extern const char *__event_name(int type, u64 config);
extern int parse_events(const struct option *opt, const char *str, int unset);
+extern int parse_filter(const struct option *opt, const char *str, int unset);
#define EVENTS_HELP_MAX (128*1024)
--
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