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perf trace: Add filter Suppport

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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>
This commit is contained in:
Li Zefan
2009-10-15 11:22:07 +08:00
committed by Ingo Molnar
parent 6fb2915df7
commit c171b552a7
3 changed files with 40 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
tools/perf/util/parse-events.c
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@ -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",