perf sched: Clean up latency and replay sub-commands

- Separate the latency and the replay commands more cleanly

 - Use consistent naming

 - Display help page on 'perf sched' outlining comments,
   instead of aborting

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 49 insertions, 50 deletions

diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 4f9e943181a3..84699cf036ab 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -543,24 +543,7 @@ static void wait_for_tasks(void)
         }
 }
 
-static int __cmd_sched(void);
-
-static void parse_trace(void)
-{
-        __cmd_sched();
-
-        printf("nr_run_events:        %ld\n", nr_run_events);
-        printf("nr_sleep_events:      %ld\n", nr_sleep_events);
-        printf("nr_wakeup_events:     %ld\n", nr_wakeup_events);
-
-        if (targetless_wakeups)
-                printf("target-less wakeups:  %ld\n", targetless_wakeups);
-        if (multitarget_wakeups)
-                printf("multi-target wakeups: %ld\n", multitarget_wakeups);
-        if (nr_run_events_optimized)
-                printf("run events optimized: %ld\n",
-                        nr_run_events_optimized);
-}
+static int read_events(void);
 
 static unsigned long nr_runs;
 static nsec_t sum_runtime;
@@ -637,6 +620,38 @@ static void test_calibrations(void)
         printf("the sleep test took %Ld nsecs\n", T1-T0);
 }
 
+static void __cmd_replay(void)
+{
+        long nr_iterations = 10, i;
+
+        calibrate_run_measurement_overhead();
+        calibrate_sleep_measurement_overhead();
+
+        test_calibrations();
+
+        read_events();
+
+        printf("nr_run_events:        %ld\n", nr_run_events);
+        printf("nr_sleep_events:      %ld\n", nr_sleep_events);
+        printf("nr_wakeup_events:     %ld\n", nr_wakeup_events);
+
+        if (targetless_wakeups)
+                printf("target-less wakeups:  %ld\n", targetless_wakeups);
+        if (multitarget_wakeups)
+                printf("multi-target wakeups: %ld\n", multitarget_wakeups);
+        if (nr_run_events_optimized)
+                printf("run events optimized: %ld\n",
+                        nr_run_events_optimized);
+
+        print_task_traces();
+        add_cross_task_wakeups();
+
+        create_tasks();
+        printf("------------------------------------------------------------\n");
+        for (i = 0; i < nr_iterations; i++)
+                run_one_test();
+}
+
 static int
 process_comm_event(event_t *event, unsigned long offset, unsigned long head)
 {
@@ -1091,10 +1106,13 @@ static void output_lat_thread(struct thread_latency *lat)
         printf("%5d        %10llu       %10llu      %10llu\n", count, total, avg, max);
 }
 
-static void output_lat_results(void)
+static void __cmd_lat(void)
 {
         struct rb_node *next;
 
+        setup_pager();
+        read_events();
+
         printf(" Tasks");
         printf("                     count");
         printf("          total");
@@ -1312,7 +1330,7 @@ process_event(event_t *event, unsigned long offset, unsigned long head)
         return 0;
 }
 
-static int __cmd_sched(void)
+static int read_events(void)
 {
         int ret, rc = EXIT_FAILURE;
         unsigned long offset = 0;
@@ -1408,8 +1426,8 @@ more:
         return rc;
 }
 
-static const char * const annotate_usage[] = {
-        "perf trace [<options>] <command>",
+static const char * const sched_usage[] = {
+        "perf sched [<options>] <command>",
         NULL
 };
 
@@ -1427,49 +1445,30 @@ static const struct option options[] = {
 
 int cmd_sched(int argc, const char **argv, const char *prefix __used)
 {
-        long nr_iterations = 10, i;
-
         symbol__init();
         page_size = getpagesize();
 
-        argc = parse_options(argc, argv, options, annotate_usage, 0);
+        argc = parse_options(argc, argv, options, sched_usage, 0);
         if (argc) {
                 /*
                  * Special case: if there's an argument left then assume tha
                  * it's a symbol filter:
                  */
                 if (argc > 1)
-                        usage_with_options(annotate_usage, options);
+                        usage_with_options(sched_usage, options);
         }
 
-//      setup_pager();
-
         if (replay_mode)
                 trace_handler = &replay_ops;
         else if (lat_mode)
                 trace_handler = &lat_ops;
-        else /* We may need a default subcommand (perf trace?) */
-                die("Please select a sub command (-r)\n");
-
-        if (replay_mode) {
-                calibrate_run_measurement_overhead();
-                calibrate_sleep_measurement_overhead();
-
-                test_calibrations();
-
-                parse_trace();
-                print_task_traces();
-                add_cross_task_wakeups();
-
-                create_tasks();
-                printf("------------------------------------------------------------\n");
-                for (i = 0; i < nr_iterations; i++)
-                        run_one_test();
-        } else if (lat_mode) {
-                setup_pager();
-                __cmd_sched();
-                output_lat_results();
-        }
+        else
+                usage_with_options(sched_usage, options);
+
+        if (replay_mode)
+                __cmd_replay();
+        else if (lat_mode)
+                __cmd_lat();
 
         return 0;
 }