perf sched: Add 'perf sched latency' and 'perf sched replay'

Separate the option parsing cleanly and add two variants:

 - 'perf sched latency' (can be abbreviated via 'perf sched lat')
 - 'perf sched replay'  (can be abbreviated via 'perf sched rep')

Also add a repeat count option to replay and add a separation
set of options for replay.

Do the sorting setup only in the latency sub-command.

Display separate help screens for 'perf sched' and
'perf sched replay -h' - i.e. further separation of the
sub-commands.

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>

diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 10fcd49e298b163412776a7657fd9400f9910ddf..e01cc63b98ccdfa105303a522317cf8c5166fcd9 100644 (file)
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -30,9 +30,6 @@ static struct thread          *last_match;
 static struct perf_header      *header;
 static u64                     sample_type;
 
-static int                     replay_mode;
-static int                     lat_mode;
-
 static char                    default_sort_order[] = "avg, max, switch, runtime";
 static char                    *sort_order = default_sort_order;
 
@@ -623,9 +620,11 @@ static void test_calibrations(void)
        printf("the sleep test took %Ld nsecs\n", T1-T0);
 }
 
+static unsigned long replay_repeat = 10;
+
 static void __cmd_replay(void)
 {
-       long nr_iterations = 10, i;
+       unsigned long i;
 
        calibrate_run_measurement_overhead();
        calibrate_sleep_measurement_overhead();
@@ -651,7 +650,7 @@ static void __cmd_replay(void)
 
        create_tasks();
        printf("------------------------------------------------------------\n");
-       for (i = 0; i < nr_iterations; i++)
+       for (i = 0; i < replay_repeat; i++)
                run_one_test();
 }
 
@@ -1623,21 +1622,45 @@ more:
 }
 
 static const char * const sched_usage[] = {
-       "perf sched [<options>] <command>",
+       "perf sched [<options>] {record|latency|replay}",
        NULL
 };
 
-static const struct option options[] = {
+static const struct option sched_options[] = {
+       OPT_BOOLEAN('v', "verbose", &verbose,
+                   "be more verbose (show symbol address, etc)"),
        OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
                    "dump raw trace in ASCII"),
-       OPT_BOOLEAN('r', "replay", &replay_mode,
-                   "replay sched behaviour from traces"),
-       OPT_BOOLEAN('l', "latency", &lat_mode,
-                   "measure various latencies"),
+       OPT_END()
+};
+
+static const char * const latency_usage[] = {
+       "perf sched latency [<options>]",
+       NULL
+};
+
+static const struct option latency_options[] = {
        OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
                   "sort by key(s): runtime, switch, avg, max"),
        OPT_BOOLEAN('v', "verbose", &verbose,
                    "be more verbose (show symbol address, etc)"),
+       OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
+                   "dump raw trace in ASCII"),
+       OPT_END()
+};
+
+static const char * const replay_usage[] = {
+       "perf sched replay [<options>]",
+       NULL
+};
+
+static const struct option replay_options[] = {
+       OPT_INTEGER('r', "repeat", &replay_repeat,
+                   "repeat the workload replay N times (-1: infinite)"),
+       OPT_BOOLEAN('v', "verbose", &verbose,
+                   "be more verbose (show symbol address, etc)"),
+       OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
+                   "dump raw trace in ASCII"),
        OPT_END()
 };
 
@@ -1649,7 +1672,7 @@ static void setup_sorting(void)
                        tok; tok = strtok_r(NULL, ", ", &tmp)) {
                if (sort_dimension__add(tok, &sort_list) < 0) {
                        error("Unknown --sort key: `%s'", tok);
-                       usage_with_options(sched_usage, options);
+                       usage_with_options(latency_usage, latency_options);
                }
        }
 
@@ -1663,29 +1686,32 @@ int cmd_sched(int argc, const char **argv, const char *prefix __used)
        symbol__init();
        page_size = getpagesize();
 
-       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(sched_usage, options);
-       }
+       argc = parse_options(argc, argv, sched_options, sched_usage,
+                            PARSE_OPT_STOP_AT_NON_OPTION);
+       if (!argc)
+               usage_with_options(sched_usage, sched_options);
 
-       if (replay_mode)
-               trace_handler = &replay_ops;
-       else if (lat_mode)
+       if (!strncmp(argv[0], "lat", 3)) {
                trace_handler = &lat_ops;
-       else
-               usage_with_options(sched_usage, options);
-
-       setup_sorting();
-
-       if (replay_mode)
-               __cmd_replay();
-       else if (lat_mode)
+               if (argc > 1) {
+                       argc = parse_options(argc, argv, latency_options, latency_usage, 0);
+                       if (argc)
+                               usage_with_options(latency_usage, latency_options);
+                       setup_sorting();
+               }
                __cmd_lat();
+       } else if (!strncmp(argv[0], "rep", 3)) {
+               trace_handler = &replay_ops;
+               if (argc) {
+                       argc = parse_options(argc, argv, replay_options, replay_usage, 0);
+                       if (argc)
+                               usage_with_options(replay_usage, replay_options);
+               }
+               __cmd_replay();
+       } else {
+               usage_with_options(sched_usage, sched_options);
+       }
+
 
        return 0;
 }