--- /dev/null
+/*
+** Copyright 2008 The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+** http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <sys/uio.h>
+#include <unistd.h>
+
+int main(int argc, char **argv) {
+ int i;
+
+ struct timeval tv1;
+ struct timeval tv2;
+ long max = 0;
+ long avg = 0;
+
+ for(i = 1; ; i++) {
+ gettimeofday(&tv1, NULL);
+ usleep(1000);
+ gettimeofday(&tv2, NULL);
+
+ long usec = (tv2.tv_sec - tv1.tv_sec) * 1000000 + tv2.tv_usec - tv1.tv_usec;
+ avg += usec;
+
+ if (usec > max) max = usec;
+ if (!(i % 1000)) {
+ avg /= 1000;
+ printf("max %ld\tavg %ld\n", max, avg);
+ max = 0;
+ avg = 0;
+ }
+ }
+ return 0;
+}