perf symbols: Move idle syms check from top to generic function

Allows list of idle symbols to be leveraged by other commands, such as
the upcoming timehist command.

Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1384806771-2945-3-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 531522d..03d37a7 100644 (file)
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -634,26 +634,9 @@ repeat:
        return NULL;
 }
 
-/* Tag samples to be skipped. */
-static const char *skip_symbols[] = {
-       "intel_idle",
-       "default_idle",
-       "native_safe_halt",
-       "cpu_idle",
-       "enter_idle",
-       "exit_idle",
-       "mwait_idle",
-       "mwait_idle_with_hints",
-       "poll_idle",
-       "ppc64_runlatch_off",
-       "pseries_dedicated_idle_sleep",
-       NULL
-};
-
 static int symbol_filter(struct map *map __maybe_unused, struct symbol *sym)
 {
        const char *name = sym->name;
-       int i;
 
        /*
         * ppc64 uses function descriptors and appends a '.' to the
@@ -671,12 +654,8 @@ static int symbol_filter(struct map *map __maybe_unused, struct symbol *sym)
            strstr(name, "_text_end"))
                return 1;
 
-       for (i = 0; skip_symbols[i]; i++) {
-               if (!strcmp(skip_symbols[i], name)) {
-                       sym->ignore = true;
-                       break;
-               }
-       }
+       if (symbol__is_idle(sym))
+               sym->ignore = true;
 
        return 0;
 }

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index c0c3696..f55c18d 100644 (file)
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -573,6 +573,36 @@ static u8 kallsyms2elf_type(char type)
        return isupper(type) ? STB_GLOBAL : STB_LOCAL;
 }
 
+bool symbol__is_idle(struct symbol *sym)
+{
+       const char * const idle_symbols[] = {
+               "cpu_idle",
+               "intel_idle",
+               "default_idle",
+               "native_safe_halt",
+               "enter_idle",
+               "exit_idle",
+               "mwait_idle",
+               "mwait_idle_with_hints",
+               "poll_idle",
+               "ppc64_runlatch_off",
+               "pseries_dedicated_idle_sleep",
+               NULL
+       };
+
+       int i;
+
+       if (!sym)
+               return false;
+
+       for (i = 0; idle_symbols[i]; i++) {
+               if (!strcmp(idle_symbols[i], sym->name))
+                       return true;
+       }
+
+       return false;
+}
+
 static int map__process_kallsym_symbol(void *arg, const char *name,
                                       char type, u64 start)
 {

diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 07de8fe..ad13c5d 100644 (file)
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -240,6 +240,7 @@ size_t symbol__fprintf(struct symbol *sym, FILE *fp);
 bool symbol_type__is_a(char symbol_type, enum map_type map_type);
 bool symbol__restricted_filename(const char *filename,
                                 const char *restricted_filename);
+bool symbol__is_idle(struct symbol *sym);
 
 int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss,
                  struct symsrc *runtime_ss, symbol_filter_t filter,