[PATCH 3/3] perf trace: Honor target pid / tid options when analyzing a file

From: David Ahern
Date: Thu Aug 29 2013 - 00:30:46 EST


Allows capture of raw_syscall events for all processes or threads in a task
and then analyzing specific ones.

Signed-off-by: David Ahern <dsahern@xxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Mike Galbraith <efault@xxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
---
tools/perf/builtin-trace.c | 43 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 43 insertions(+)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index a03c777..ec0c7b3 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -8,6 +8,7 @@
#include "util/thread.h"
#include "util/parse-options.h"
#include "util/strlist.h"
+#include "util/intlist.h"
#include "util/thread_map.h"

#include <libaudit.h>
@@ -259,6 +260,8 @@ struct trace {
unsigned long nr_events;
struct strlist *ev_qualifier;
bool not_ev_qualifier;
+ struct intlist *tid_list;
+ struct intlist *pid_list;
bool sched;
bool multiple_threads;
double duration_filter;
@@ -649,6 +652,18 @@ out_dump:
return 0;
}

+static bool skip_sample(struct trace *trace, struct perf_sample *sample)
+{
+ if ((trace->pid_list && intlist__find(trace->pid_list, sample->pid)) ||
+ (trace->tid_list && intlist__find(trace->tid_list, sample->tid)))
+ return false;
+
+ if (trace->pid_list || trace->tid_list)
+ return true;
+
+ return false;
+}
+
static int trace__process_sample(struct perf_tool *tool,
union perf_event *event __maybe_unused,
struct perf_sample *sample,
@@ -660,6 +675,9 @@ static int trace__process_sample(struct perf_tool *tool,

tracepoint_handler handler = evsel->handler.func;

+ if (skip_sample(trace, sample))
+ return 0;
+
if (trace->base_time == 0)
trace->base_time = sample->time;

@@ -679,6 +697,27 @@ perf_session__has_tp(struct perf_session *session, const char *name)
return evsel != NULL;
}

+static int parse_target_str(struct trace *trace)
+{
+ if (trace->opts.target.pid) {
+ trace->pid_list = intlist__new(trace->opts.target.pid);
+ if (trace->pid_list == NULL) {
+ pr_err("Error parsing process id string\n");
+ return -EINVAL;
+ }
+ }
+
+ if (trace->opts.target.tid) {
+ trace->tid_list = intlist__new(trace->opts.target.tid);
+ if (trace->tid_list == NULL) {
+ pr_err("Error parsing thread id string\n");
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
static int trace__run(struct trace *trace, int argc, const char **argv)
{
struct perf_evlist *evlist = perf_evlist__new();
@@ -865,6 +904,10 @@ static int trace__replay(struct trace *trace)
goto out;
}

+ err = parse_target_str(trace);
+ if (err != 0)
+ goto out;
+
setup_pager();

err = perf_session__process_events(session, &trace->tool);
--
1.7.10.1

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