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Subject[PATCH 22/34] perf symbols: Move idle syms check from top to generic function
Date
From: David Ahern <dsahern@gmail.com>

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>
---
tools/perf/builtin-top.c | 25 ++-----------------------
tools/perf/util/symbol.c | 30 ++++++++++++++++++++++++++++++
tools/perf/util/symbol.h | 1 +
3 files changed, 33 insertions(+), 23 deletions(-)

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 531522d3d97b..03d37a76c612 100644
--- 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 c0c36965fff0..f55c18da1e40 100644
--- 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 07de8fea2f48..ad13c5d50b91 100644
--- 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,
--
1.8.1.4


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