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readtest: print min/avg report at end

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Robin Gareus 2015-01-20 01:27:47 +01:00
parent 899ee95ee0
commit e6b696690a
1 changed files with 15 additions and 1 deletions
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16
tools/readtest.c
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@ -126,6 +126,8 @@ main (int argc, char* argv[])
data = (char*) malloc (sizeof (char) * block_size); data = (char*) malloc (sizeof (char) * block_size);
uint64_t _read = 0; uint64_t _read = 0;
double min_throughput = -1;
double total_time = 0;
while (true) { while (true) {
gint64 before; gint64 before;
@ -135,7 +137,7 @@ main (int argc, char* argv[])
if (read (files[n], (char*) data, block_size) != block_size) { if (read (files[n], (char*) data, block_size) != block_size) {
fprintf (stderr, "read failed on file %d (%s)\n", n, strerror (errno)); fprintf (stderr, "read failed on file %d (%s)\n", n, strerror (errno));
return -1; goto out;
} }
} }
@ -144,6 +146,18 @@ main (int argc, char* argv[])
double bandwidth = ((nfiles * block_size)/1048576.0) / (elapsed/1000000.0); double bandwidth = ((nfiles * block_size)/1048576.0) / (elapsed/1000000.0);
printf ("BW @ %Lu %.3f seconds bandwidth %.4f MB/sec\n", _read, elapsed/1000000.0, bandwidth); printf ("BW @ %Lu %.3f seconds bandwidth %.4f MB/sec\n", _read, elapsed/1000000.0, bandwidth);
total_time += elapsed;
if (min_throughput > bandwidth || min_throughput < 0) {
min_throughput = bandwidth;
}
}
out:
if (min_throughput > 0 && total_time > 0) {
double bandwidth = ((nfiles * _read)/1048576.0) / (total_time/1000000.0);
printf ("Min: %.4f MB/sec Avg: %.4f MB/sec\n", min_throughput, bandwidth);
} }
return 0; return 0;