#include "util/parse-events.h"
#include "util/event.h"
#include "util/debug.h"
+#include "util/header.h"
#include <sys/prctl.h>
#include <math.h>
static struct perf_event_attr default_attrs[] = {
- { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
- { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES},
- { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
- { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
+ { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
+ { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
+ { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
+ { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
- { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
- { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
- { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES},
- { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES },
+ { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
+ { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
+ { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
+ { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
+ { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES },
+ { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES },
};
static int event_scaled[MAX_COUNTERS];
+static volatile int done = 0;
+
struct stats
{
double n, mean, M2;
struct stats runtime_nsecs_stats;
struct stats walltime_nsecs_stats;
struct stats runtime_cycles_stats;
+struct stats runtime_branches_stats;
#define MATCH_EVENT(t, c, counter) \
(attrs[counter].type == PERF_TYPE_##t && \
update_stats(&runtime_nsecs_stats, count[0]);
if (MATCH_EVENT(HARDWARE, HW_CPU_CYCLES, counter))
update_stats(&runtime_cycles_stats, count[0]);
+ if (MATCH_EVENT(HARDWARE, HW_BRANCH_INSTRUCTIONS, counter))
+ update_stats(&runtime_branches_stats, count[0]);
}
static int run_perf_stat(int argc __used, const char **argv)
unsigned long long t0, t1;
int status = 0;
int counter;
- int pid;
+ int pid = target_pid;
int child_ready_pipe[2], go_pipe[2];
+ const bool forks = (target_pid == -1 && argc > 0);
char buf;
if (!system_wide)
nr_cpus = 1;
- if (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0) {
+ if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
perror("failed to create pipes");
exit(1);
}
- if ((pid = fork()) < 0)
- perror("failed to fork");
-
- if (!pid) {
- close(child_ready_pipe[0]);
- close(go_pipe[1]);
- fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
+ if (forks) {
+ if ((pid = fork()) < 0)
+ perror("failed to fork");
+
+ if (!pid) {
+ close(child_ready_pipe[0]);
+ close(go_pipe[1]);
+ fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
+
+ /*
+ * Do a dummy execvp to get the PLT entry resolved,
+ * so we avoid the resolver overhead on the real
+ * execvp call.
+ */
+ execvp("", (char **)argv);
+
+ /*
+ * Tell the parent we're ready to go
+ */
+ close(child_ready_pipe[1]);
+
+ /*
+ * Wait until the parent tells us to go.
+ */
+ if (read(go_pipe[0], &buf, 1) == -1)
+ perror("unable to read pipe");
+
+ execvp(argv[0], (char **)argv);
+
+ perror(argv[0]);
+ exit(-1);
+ }
- /*
- * Do a dummy execvp to get the PLT entry resolved,
- * so we avoid the resolver overhead on the real
- * execvp call.
- */
- execvp("", (char **)argv);
+ child_pid = pid;
/*
- * Tell the parent we're ready to go
+ * Wait for the child to be ready to exec.
*/
close(child_ready_pipe[1]);
-
- /*
- * Wait until the parent tells us to go.
- */
- if (read(go_pipe[0], &buf, 1) == -1)
+ close(go_pipe[0]);
+ if (read(child_ready_pipe[0], &buf, 1) == -1)
perror("unable to read pipe");
-
- execvp(argv[0], (char **)argv);
-
- perror(argv[0]);
- exit(-1);
+ close(child_ready_pipe[0]);
}
- child_pid = pid;
-
- /*
- * Wait for the child to be ready to exec.
- */
- close(child_ready_pipe[1]);
- close(go_pipe[0]);
- if (read(child_ready_pipe[0], &buf, 1) == -1)
- perror("unable to read pipe");
- close(child_ready_pipe[0]);
-
for (counter = 0; counter < nr_counters; counter++)
create_perf_stat_counter(counter, pid);
*/
t0 = rdclock();
- close(go_pipe[1]);
- wait(&status);
+ if (forks) {
+ close(go_pipe[1]);
+ wait(&status);
+ } else {
+ while(!done);
+ }
t1 = rdclock();
ratio = avg / total;
fprintf(stderr, " # %10.3f IPC ", ratio);
- } else {
+ } else if (MATCH_EVENT(HARDWARE, HW_BRANCH_MISSES, counter) &&
+ runtime_branches_stats.n != 0) {
+ total = avg_stats(&runtime_branches_stats);
+
+ if (total)
+ ratio = avg * 100 / total;
+
+ fprintf(stderr, " # %10.3f %% ", ratio);
+
+ } else if (runtime_nsecs_stats.n != 0) {
total = avg_stats(&runtime_nsecs_stats);
if (total)
fflush(stdout);
fprintf(stderr, "\n");
- fprintf(stderr, " Performance counter stats for \'%s", argv[0]);
-
- for (i = 1; i < argc; i++)
- fprintf(stderr, " %s", argv[i]);
+ fprintf(stderr, " Performance counter stats for ");
+ if(target_pid == -1) {
+ fprintf(stderr, "\'%s", argv[0]);
+ for (i = 1; i < argc; i++)
+ fprintf(stderr, " %s", argv[i]);
+ }else
+ fprintf(stderr, "task pid \'%d", target_pid);
fprintf(stderr, "\'");
if (run_count > 1)
static void skip_signal(int signo)
{
+ if(target_pid != -1)
+ done = 1;
+
signr = signo;
}
}
static const char * const stat_usage[] = {
- "perf stat [<options>] <command>",
+ "perf stat [<options>] [<command>]",
NULL
};
argc = parse_options(argc, argv, options, stat_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
- if (!argc)
+ if (!argc && target_pid == -1)
usage_with_options(stat_usage, options);
if (run_count <= 0)
usage_with_options(stat_usage, options);
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