perf bench: Modify builtin-bench.c for processing common options

This patch modifies builtin-bench.c for processing common
options. The first option added is "--format".
Users of perf bench will be able to specify output style by
--format.

Usage example:

 % ./perf bench sched messaging		# with no style specify
 (20 sender and receiver processes per group)
 (10 groups == 400 processes run)

         Total time:1.431 sec

 % ./perf bench --format=simple sched messaging # specified
 simple 1.431

Signed-off-by: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1257808802-9420-3-git-send-email-mitake@dcl.info.waseda.ac.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 65 insertions, 14 deletions

diff --git a/tools/perf/builtin-bench.c b/tools/perf/builtin-bench.c
index 31f41643b0cd..c7505eaff84b 100644
--- a/tools/perf/builtin-bench.c
+++ b/tools/perf/builtin-bench.c
@@ -74,53 +74,104 @@ static void dump_suites(int subsys_index)
         return;
 }
 
+static char *bench_format_str;
+int bench_format = BENCH_FORMAT_DEFAULT;
+
+static const struct option bench_options[] = {
+        OPT_STRING('f', "format", &bench_format_str, "default",
+                    "Specify format style"),
+        OPT_END()
+};
+
+static const char * const bench_usage[] = {
+        "perf bench [<common options>] <subsystem> <suite> [<options>]",
+        NULL
+};
+
+static void print_usage(void)
+{
+        int i;
+
+        printf("Usage: \n");
+        for (i = 0; bench_usage[i]; i++)
+                printf("\t%s\n", bench_usage[i]);
+        printf("\n");
+
+        printf("List of available subsystems...\n\n");
+
+        for (i = 0; subsystems[i].name; i++)
+                printf("\t%s: %s\n",
+                       subsystems[i].name, subsystems[i].summary);
+        printf("\n");
+}
+
+static int bench_str2int(char *str)
+{
+        if (!str)
+                return BENCH_FORMAT_DEFAULT;
+
+        if (!strcmp(str, BENCH_FORMAT_DEFAULT_STR))
+                return BENCH_FORMAT_DEFAULT;
+        else if (!strcmp(str, BENCH_FORMAT_SIMPLE_STR))
+                return BENCH_FORMAT_SIMPLE;
+
+        return BENCH_FORMAT_UNKNOWN;
+}
+
 int cmd_bench(int argc, const char **argv, const char *prefix __used)
 {
         int i, j, status = 0;
 
         if (argc < 2) {
                 /* No subsystem specified. */
-                printf("Usage: perf bench <subsystem> <suite> [<options>]\n\n");
-                printf("List of available subsystems...\n\n");
+                print_usage();
+                goto end;
+        }
 
-                for (i = 0; subsystems[i].name; i++)
-                        printf("\t%s: %s\n",
-                               subsystems[i].name, subsystems[i].summary);
-                printf("\n");
+        argc = parse_options(argc, argv, bench_options, bench_usage,
+                             PARSE_OPT_STOP_AT_NON_OPTION);
+
+        bench_format = bench_str2int(bench_format_str);
+        if (bench_format == BENCH_FORMAT_UNKNOWN) {
+                printf("Unknown format descriptor:%s\n", bench_format_str);
+                goto end;
+        }
 
+        if (argc < 1) {
+                print_usage();
                 goto end;
         }
 
         for (i = 0; subsystems[i].name; i++) {
-                if (strcmp(subsystems[i].name, argv[1]))
+                if (strcmp(subsystems[i].name, argv[0]))
                         continue;
 
-                if (argc < 3) {
+                if (argc < 2) {
                         /* No suite specified. */
                         dump_suites(i);
                         goto end;
                 }
 
                 for (j = 0; subsystems[i].suites[j].name; j++) {
-                        if (strcmp(subsystems[i].suites[j].name, argv[2]))
+                        if (strcmp(subsystems[i].suites[j].name, argv[1]))
                                 continue;
 
-                        status = subsystems[i].suites[j].fn(argc - 2,
-                                                            argv + 2, prefix);
+                        status = subsystems[i].suites[j].fn(argc - 1,
+                                                            argv + 1, prefix);
                         goto end;
                 }
 
-                if (!strcmp(argv[2], "-h") || !strcmp(argv[2], "--help")) {
+                if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) {
                         dump_suites(i);
                         goto end;
                 }
 
-                printf("Unknown suite:%s for %s\n", argv[2], argv[1]);
+                printf("Unknown suite:%s for %s\n", argv[1], argv[0]);
                 status = 1;
                 goto end;
         }
 
-        printf("Unknown subsystem:%s\n", argv[1]);
+        printf("Unknown subsystem:%s\n", argv[0]);
         status = 1;
 
 end: