linux-kernel - [PATCH 14/15] perf trace: Honor target pid / tid options when analyzing a file

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Message-Id: <1377889138-8793-15-git-send-email-acme@infradead.org>
Date:	Fri, 30 Aug 2013 15:58:57 -0300
From:	Arnaldo Carvalho de Melo <acme@...radead.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	linux-kernel@...r.kernel.org, David Ahern <dsahern@...il.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mike Galbraith <efault@....de>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...gle.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 14/15] perf trace: Honor target pid / tid options when analyzing a file

From: David Ahern <dsahern@...il.com>

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@...il.com>
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Mike Galbraith <efault@....de>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Stephane Eranian <eranian@...gle.com>
Link: http://lkml.kernel.org/r/1377750593-48046-4-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 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 2a6ebe1..845facc 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;
@@ -653,6 +656,18 @@ 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,
@@ -664,6 +679,9 @@ 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;
 
@@ -683,6 +701,27 @@ 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();
@@ -869,6 +908,10 @@ 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);
-- 
1.8.1.4

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