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perf script: Implement option for system-wide profiling

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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>
This commit is contained in:
Robert Richter 2011-11-25 15:05:25 +01:00 committed by Arnaldo Carvalho de Melo
parent 38efb539c1
commit 317df650c5
1 changed files with 10 additions and 5 deletions
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15
tools/perf/builtin-script.c
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@ -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 *));