linux-kernel - [PATCH v2 04/21] libtracefs: Add unit test to test tracefs

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Date:   Tue,  3 Aug 2021 00:23:30 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     linux-trace-devel@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Tom Zanussi <zanussi@...nel.org>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-rt-users <linux-rt-users@...r.kernel.org>,
        Clark Williams <williams@...hat.com>,
        "Steven Rostedt (VMware)" <rostedt@...dmis.org>
Subject: [PATCH v2 04/21] libtracefs: Add unit test to test tracefs_sql() compare

From: "Steven Rostedt (VMware)" <rostedt@...dmis.org>

Add a test to test passing time from sched_waking to sched_switch to
show wake up latency.

Signed-off-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
---
 utest/tracefs-utest.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/utest/tracefs-utest.c b/utest/tracefs-utest.c
index 89bb1cce61f7..f4e1a6b90a46 100644
--- a/utest/tracefs-utest.c
+++ b/utest/tracefs-utest.c
@@ -50,6 +50,9 @@
 #define SQL_2_EVENT	"wakeup_2"
 #define SQL_2_SQL	"select woke.next_pid as woke_pid, wake.common_pid as waking_pid from sched_waking as wake join sched_switch as woke on woke.next_pid = wake.pid"
 
+#define SQL_3_EVENT	"wakeup_lat"
+#define SQL_3_SQL	"select start.pid, end.next_prio as prio, (end.TIMESTAMP_USECS - start.TIMESTAMP_USECS) as lat from sched_waking as start join sched_switch as end on start.pid = end.next_pid"
+
 static struct tracefs_instance *test_instance;
 static struct tep_handle *test_tep;
 struct test_sample {
@@ -354,6 +357,13 @@ static void test_instance_trace_sql(struct tracefs_instance *instance)
 	tracefs_synth_free(synth);
 	trace_seq_reset(&seq);
 
+	synth = tracefs_sql(tep, SQL_3_EVENT, SQL_3_SQL, NULL);
+	CU_TEST(synth != NULL);
+	ret = tracefs_synth_show(&seq, instance, synth);
+	CU_TEST(ret == 0);
+	tracefs_synth_free(synth);
+	trace_seq_reset(&seq);
+
 	tep_free(tep);
 	trace_seq_destroy(&seq);
 }
-- 
2.30.2