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authorRobert Richter <robert.richter@amd.com>2011-11-25 15:05:25 +0100
committerArnaldo Carvalho de Melo <acme@redhat.com>2011-12-12 08:44:00 -0200
commit317df650c588bb9091b1fa0b5d726fe485aad88e (patch)
tree64de022f7bce1c948e316c88fc67b8b543d56616 /tools/perf
parent38efb539c13f8f173e381435cdd40463ab5d38de (diff)
downloadlinux-linaro-stable-317df650c588bb9091b1fa0b5d726fe485aad88e.tar.gz
perf script: Implement option for system-wide profiling
The option is documented in man perf-script but was not yet implemented: -a Force system-wide collection. Scripts run without a <command> normally use -a by default, while scripts run with a <command> normally don't - this option allows the latter to be run in system-wide mode. As with perf record you now can profile in system-wide mode for the runtime of a given command, e.g.: # perf script -a syscall-counts sleep 2 Cc: Ingo Molnar <mingo@elte.hu> Link: http://lkml.kernel.org/r/1322229925-10075-1-git-send-email-robert.richter@amd.com Signed-off-by: Robert Richter <robert.richter@amd.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/builtin-script.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index ccbfd56d7549..ea71c5e1a94f 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -24,6 +24,7 @@ static u64 nr_unordered;
extern const struct option record_options[];
static bool no_callchain;
static bool show_full_info;
+static bool system_wide;
static const char *cpu_list;
static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
@@ -1105,6 +1106,8 @@ static const struct option options[] = {
OPT_CALLBACK('f', "fields", NULL, "str",
"comma separated output fields prepend with 'type:'. Valid types: hw,sw,trace,raw. Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,addr",
parse_output_fields),
+ OPT_BOOLEAN('a', "all-cpus", &system_wide,
+ "system-wide collection from all CPUs"),
OPT_STRING('C', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
OPT_STRING('c', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
"only display events for these comms"),
@@ -1134,7 +1137,6 @@ int cmd_script(int argc, const char **argv, const char *prefix __used)
struct perf_session *session;
char *script_path = NULL;
const char **__argv;
- bool system_wide;
int i, j, err;
setup_scripting();
@@ -1202,15 +1204,17 @@ int cmd_script(int argc, const char **argv, const char *prefix __used)
}
if (!pid) {
- system_wide = true;
j = 0;
dup2(live_pipe[1], 1);
close(live_pipe[0]);
- if (!is_top_script(argv[0]))
+ if (is_top_script(argv[0])) {
+ system_wide = true;
+ } else if (!system_wide) {
system_wide = !have_cmd(argc - rep_args,
&argv[rep_args]);
+ }
__argv = malloc((argc + 6) * sizeof(const char *));
if (!__argv)
@@ -1258,10 +1262,11 @@ int cmd_script(int argc, const char **argv, const char *prefix __used)
script_path = rep_script_path;
if (script_path) {
- system_wide = false;
j = 0;
- if (rec_script_path)
+ if (!rec_script_path)
+ system_wide = false;
+ else if (!system_wide)
system_wide = !have_cmd(argc - 1, &argv[1]);
__argv = malloc((argc + 2) * sizeof(const char *));