perf bench sched-pipe: Use linux/time64.h, USEC_PER_SEC

Following kernel practices.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-wgfu1h1pnw8lc919o2tan58y@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/bench/sched-pipe.c

@@ -25,6 +25,7 @@
 #include <sys/time.h>
 #include <sys/types.h>
 #include <sys/syscall.h>
+#include <linux/time64.h>
 
 #include <pthread.h>
 
@@ -153,24 +154,24 @@ int bench_sched_pipe(int argc, const char **argv, const char *prefix __maybe_unu
 		printf("# Executed %d pipe operations between two %s\n\n",
 			loops, threaded ? "threads" : "processes");
 
-		result_usec = diff.tv_sec * 1000000;
+		result_usec = diff.tv_sec * USEC_PER_SEC;
 		result_usec += diff.tv_usec;
 
 		printf(" %14s: %lu.%03lu [sec]\n\n", "Total time",
 		       diff.tv_sec,
-		       (unsigned long) (diff.tv_usec/1000));
+		       (unsigned long) (diff.tv_usec / USEC_PER_MSEC));
 
 		printf(" %14lf usecs/op\n",
 		       (double)result_usec / (double)loops);
 		printf(" %14d ops/sec\n",
 		       (int)((double)loops /
-			     ((double)result_usec / (double)1000000)));
+			     ((double)result_usec / (double)USEC_PER_SEC)));
 		break;
 
 	case BENCH_FORMAT_SIMPLE:
 		printf("%lu.%03lu\n",
 		       diff.tv_sec,
-		       (unsigned long) (diff.tv_usec / 1000));
+		       (unsigned long) (diff.tv_usec / USEC_PER_MSEC));
 		break;
 
 	default: