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@cn.fujitsu.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <4AD6955F.90602@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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 @@
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 @@
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",