diff options
Diffstat (limited to 'tools/perf/builtin-stat.c')
| -rw-r--r-- | tools/perf/builtin-stat.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 9a39ca3c3ac4..a6b4d44f9502 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -69,7 +69,7 @@ static struct perf_event_attr default_attrs[] = { }; static bool system_wide = false; -static unsigned int nr_cpus = 0; +static int nr_cpus = 0; static int run_idx = 0; static int run_count = 1; @@ -82,6 +82,7 @@ static int thread_num = 0; static pid_t child_pid = -1; static bool null_run = false; static bool big_num = false; +static const char *cpu_list; static int *fd[MAX_NR_CPUS][MAX_COUNTERS]; @@ -158,7 +159,7 @@ static int create_perf_stat_counter(int counter) PERF_FORMAT_TOTAL_TIME_RUNNING; if (system_wide) { - unsigned int cpu; + int cpu; for (cpu = 0; cpu < nr_cpus; cpu++) { fd[cpu][counter][0] = sys_perf_event_open(attr, @@ -208,7 +209,7 @@ static inline int nsec_counter(int counter) static void read_counter(int counter) { u64 count[3], single_count[3]; - unsigned int cpu; + int cpu; size_t res, nv; int scaled; int i, thread; @@ -542,6 +543,8 @@ static const struct option options[] = { "null run - dont start any counters"), OPT_BOOLEAN('B', "big-num", &big_num, "print large numbers with thousands\' separators"), + OPT_STRING('C', "cpu", &cpu_list, "cpu", + "list of cpus to monitor in system-wide"), OPT_END() }; @@ -566,10 +569,13 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used) } if (system_wide) - nr_cpus = read_cpu_map(); + nr_cpus = read_cpu_map(cpu_list); else nr_cpus = 1; + if (nr_cpus < 1) + usage_with_options(stat_usage, options); + if (target_pid != -1) { target_tid = target_pid; thread_num = find_all_tid(target_pid, &all_tids); |