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