readtest: print min/avg report at end

[ardour.git] / tools / readtest.c

diff --git a/tools/readtest.c b/tools/readtest.c
index 41c3a444af2ce6b2d3ebda2083b6a8249a6a0430..42e95ce3cb06137d446baf73e2ce92dce9fadd45 100644 (file)
--- a/tools/readtest.c
+++ b/tools/readtest.c
@@ -126,6 +126,8 @@ main (int argc, char* argv[])
 
        data = (char*) malloc (sizeof (char) * block_size);
        uint64_t _read = 0;
+       double min_throughput = -1;
+       double total_time = 0;
 
        while (true) {
                gint64 before;
@@ -135,7 +137,7 @@ main (int argc, char* argv[])
 
                        if (read (files[n], (char*) data, block_size) != block_size) {
                                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);
 
                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;