* Written by Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
*/
+#include "debug.h"
#include "../perf.h"
#include "../util/util.h"
#include <subcmd/parse-options.h>
.config = PERF_COUNT_HW_CPU_CYCLES
};
-static void init_cycles(void)
+static int init_cycles(void)
{
cycles_fd = sys_perf_event_open(&cycle_attr, getpid(), -1, -1, perf_event_open_cloexec_flag());
- if (cycles_fd < 0 && errno == ENOSYS)
- die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
- else
- BUG_ON(cycles_fd < 0);
+ if (cycles_fd < 0 && errno == ENOSYS) {
+ pr_debug("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
+ return -1;
+ }
+
+ return cycles_fd;
}
static u64 get_cycles(void)
argc = parse_options(argc, argv, options, info->usage, 0);
- if (use_cycles)
- init_cycles();
+ if (use_cycles) {
+ i = init_cycles();
+ if (i < 0) {
+ fprintf(stderr, "Failed to open cycles counter\n");
+ return i;
+ }
+ }
size = (size_t)perf_atoll((char *)size_str);
size_total = (double)size * nr_loops;