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#include "common/Clock.h"
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#include "common/safe_io.h"
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int main(int argc, char **argv)
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int fd, count, loop = 0, ret;
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fprintf(stderr, "Usage: %s device bsize count\n", argv[0]);
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int bsize = atoi(argv[2]);
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count = atoi(argv[3]);
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posix_memalign(&buf, sysconf(_SC_PAGESIZE), bsize);
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//if ((fd = open(argv[1], O_SYNC|O_RDWR)) < 0) {
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if ((fd = open(argv[1], O_DIRECT|O_RDWR)) < 0) {
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fprintf(stderr, "Can't open device %s\n", argv[1]);
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utime_t start = ceph_clock_now(g_ceph_context);
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while (loop++ < count) {
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ret = safe_write(fd, buf, bsize);
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//if ((loop % 100) == 0)
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//fprintf(stderr, ".");
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utime_t end = ceph_clock_now(g_ceph_context);
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gethostname(hostname, 80);
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double mb = bsize*count/1024/1024;
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cout << hostname << "\t" << mb << " MB\t" << end << " seconds\t" << (mb / (double)end) << " MB/sec" << std::endl;