Date: Sat, 18 Jul 2009 08:49:39 GMT From: Zhao Shuai <zhaoshuai@FreeBSD.org> To: Perforce Change Reviews <perforce@FreeBSD.org> Subject: PERFORCE change 166220 for review Message-ID: <200907180849.n6I8ndgj024408@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=166220 Change 166220 by zhaoshuai@zhaoshuai on 2009/07/18 08:48:39 add some comment in the benchmark program. Affected files ... .. //depot/projects/soc2009/fifo/fifo_test/performance/benchmark.c#2 edit .. //depot/projects/soc2009/fifo/fifo_test/performance/runme.sh#3 edit Differences ... ==== //depot/projects/soc2009/fifo/fifo_test/performance/benchmark.c#2 (text+ko) ==== @@ -56,21 +56,21 @@ goto error1; } - if (pid > 0) { /* producer */ + if (pid > 0) { /* parent as producer */ for (i = 0 ; i < array_size; i++) msg_array[i] = i; + /* record the start time */ gettimeofday(&start_time, NULL); - write(fd, msg_array, msg_size * num_msgs); - wait(NULL); - + /* record the end time */ gettimeofday(&end_time, NULL); + /* caculate the time we use(in microseconds) */ time = 1000000 * (end_time.tv_sec - start_time.tv_sec) + (end_time.tv_usec - start_time.tv_usec); printf("%u", time); - } else { /* consumer */ + } else { /* child as consumer */ while (total_read < msg_size * num_msgs) { nread = read(fd, consumer_buf + total_read / sizeof(int), msg_size * num_msgs); for (i = total_read / sizeof(int); i < nread / sizeof(int); i++) ==== //depot/projects/soc2009/fifo/fifo_test/performance/runme.sh#3 (text+ko) ==== @@ -2,30 +2,30 @@ if [ ! -e benchmark ] then - echo "can't find the benchmark program!" - exit + echo "can't find the benchmark program, build it first!" + exit fi echo -ne "\t" for num_msg in 1 10 100 1000 10000 100000 do - echo -ne "${num_msg}\t" + echo -ne "${num_msg}\t" done echo "" for msg_size in 64 128 256 512 1024 2048 4096 do - echo -ne "${msg_size}B\t" - for num_msg in 1 10 100 1000 10000 100000 - do - sum=0 - for ((i = 0; i < 10; i++)) + echo -ne "${msg_size}B\t" + for num_msg in 1 10 100 1000 10000 100000 do - time=`./benchmark $msg_size $num_msg` - sum=$(($time + $sum)) + sum=0 + for ((i = 0; i < 10; i++)) + do + time=`./benchmark $msg_size $num_msg` + sum=$(($time + $sum)) + done + avarage_time=$(($sum / 10)) + echo -ne "${avarage_time}us\t" done - avarage_time=$(($sum / 10)) - echo -ne "${avarage_time}ns\t" - done - echo "" + echo "" done
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