X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=tools%2Freadtest.c;h=9a431fd2fbdd5b284495670bbaf4beefb123a619;hb=ae32f44dc95801372b1a2a4549e0997550d16eef;hp=42e95ce3cb06137d446baf73e2ce92dce9fadd45;hpb=e6b696690ac00a4b0a02cfd302906af1cc18655d;p=ardour.git diff --git a/tools/readtest.c b/tools/readtest.c index 42e95ce3cb..9a431fd2fb 100644 --- a/tools/readtest.c +++ b/tools/readtest.c @@ -1,4 +1,8 @@ -/* gcc -o readtest readtest.cc `pkg-config --cflags --libs glib-2.0` */ +/* gcc -o readtest readtest.c `pkg-config --cflags --libs glib-2.0` -lm */ + +#ifndef _WIN32 +# define HAVE_MMAP +#endif #include #include @@ -8,36 +12,45 @@ #include #include #include -#include +#include + +#ifdef HAVE_MMAP +# include +# include +#endif #include char* data = 0; -int -read_one (int fd, ssize_t sz) -{ - return 0; -} - void usage () { - fprintf (stderr, "readtest [ -b BLOCKSIZE ] [ -s ] [ -D ] filename-template\n"); + fprintf (stderr, "readtest [ -b BLOCKSIZE ] [-l FILELIMIT] [ -D ] [ -R ] [ -M ] filename-template\n"); } int main (int argc, char* argv[]) { int* files; - char optstring[] = "b:D"; + char optstring[] = "b:DRMl:q"; uint32_t block_size = 64 * 1024 * 4; + int max_files = -1; #ifdef __APPLE__ - bool direct = false; + int direct = 0; + int noreadahead = 0; +#endif +#ifdef HAVE_MMAP + int use_mmap = 0; + void **addr; + size_t *flen; #endif const struct option longopts[] = { { "blocksize", 1, 0, 'b' }, { "direct", 0, 0, 'D' }, + { "mmap", 0, 0, 'M' }, + { "noreadahead", 0, 0, 'R' }, + { "limit", 1, 0, 'l' }, { 0, 0, 0, 0 } }; @@ -47,6 +60,7 @@ main (int argc, char* argv[]) int flags = O_RDONLY; int n = 0; int nfiles = 0; + int quiet = 0; while (1) { if ((c = getopt_long (argc, argv, optstring, longopts, &option_index)) == -1) { @@ -54,17 +68,33 @@ main (int argc, char* argv[]) } switch (c) { - case 'b': - block_size = atoi (optarg); - break; - case 'D': + case 'b': + block_size = atoi (optarg); + break; + case 'l': + max_files = atoi (optarg); + break; + case 'D': +#ifdef __APPLE__ + direct = 1; +#endif + break; + case 'M': +#ifdef HAVE_MMAP + use_mmap = 1; +#endif + break; + case 'R': #ifdef __APPLE__ - direct = true; + noreadahead = 1; #endif - break; - default: - usage (); - return 0; + break; + case 'q': + quiet = 1; + break; + default: + usage (); + return 0; } } @@ -85,6 +115,10 @@ main (int argc, char* argv[]) } ++n; + + if (max_files > 0 && n >= max_files) { + break; + } } if (n == 0) { @@ -92,10 +126,21 @@ main (int argc, char* argv[]) return 1; } - printf ("Discovered %d files using %s\n", n, name_template); + if (!quiet) { + printf ("# Discovered %d files using %s\n", n, name_template); + } nfiles = n; files = (int *) malloc (sizeof (int) * nfiles); +#ifdef HAVE_MMAP + if (use_mmap) { + if (!quiet) { + printf ("# Using mmap().\n"); + } + addr = malloc (sizeof (void*) * nfiles); + flen = (size_t*) malloc (sizeof (size_t) * nfiles); + } +#endif for (n = 0; n < nfiles; ++n) { @@ -119,25 +164,65 @@ main (int argc, char* argv[]) fprintf (stderr, "Cannot set F_NOCACHE on file #%d\n", n); } } + + if (noreadahead) { + if (fcntl (fd, F_RDAHEAD, 0) == -1) { + fprintf (stderr, "Cannot set F_READAHED on file #%d\n", n); + } + } #endif files[n] = fd; + +#ifdef HAVE_MMAP + if (use_mmap) { + struct stat s; + if (fstat (fd, & s)) { + fprintf (stderr, "Could not stat fd #%d @ %s\n", n, path); + return 1; + } + if (s.st_size < block_size) { + fprintf (stderr, "file is shorter than blocksize #%d @ %s\n", n, path); + return 1; + } + flen[n] = s.st_size; + addr[n] = mmap (0, s.st_size, PROT_READ, MAP_PRIVATE, fd, 0); + if (addr[n] == MAP_FAILED) { + fprintf (stderr, "Could not mmap file #%d @ %s (%s)\n", n, path, strerror (errno)); + return 1; + } + } +#endif } data = (char*) malloc (sizeof (char) * block_size); uint64_t _read = 0; - double min_throughput = -1; + double max_elapsed = 0; double total_time = 0; + double var_m = 0; + double var_s = 0; + uint64_t cnt = 0; - while (true) { + while (1) { gint64 before; before = g_get_monotonic_time(); - for (n = 0; n < nfiles; ++n) { - - if (read (files[n], (char*) data, block_size) != block_size) { - fprintf (stderr, "read failed on file %d (%s)\n", n, strerror (errno)); - goto out; +#ifdef HAVE_MMAP + if (use_mmap) { + for (n = 0; n < nfiles; ++n) { + if (_read + n + block_size > flen[n]) { + goto out; + } + memmove(data, &addr[n][_read], block_size); + } + } + else +#endif + { + for (n = 0; n < nfiles; ++n) { + if (read (files[n], (char*) data, block_size) != block_size) { + goto out; + } } } @@ -145,19 +230,37 @@ main (int argc, char* argv[]) gint64 elapsed = g_get_monotonic_time() - before; 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); + if (!quiet) { + printf ("# BW @ %lu %.3f seconds bandwidth %.4f MB/sec\n", (long unsigned int)_read, elapsed/1000000.0, bandwidth); + } total_time += elapsed; - if (min_throughput > bandwidth || min_throughput < 0) { - min_throughput = bandwidth; + + ++cnt; + if (max_elapsed == 0) { + var_m = elapsed; + } else { + const double var_m1 = var_m; + var_m = var_m + (elapsed - var_m) / (double)(cnt); + var_s = var_s + (elapsed - var_m) * (elapsed - var_m1); + } + + if (elapsed > max_elapsed) { + max_elapsed = elapsed; } } out: - if (min_throughput > 0 && total_time > 0) { + if (max_elapsed > 0 && total_time > 0) { + double stddev = cnt > 1 ? sqrt(var_s / ((double)(cnt-1))) : 0; double bandwidth = ((nfiles * _read)/1048576.0) / (total_time/1000000.0); - printf ("Min: %.4f MB/sec Avg: %.4f MB/sec\n", min_throughput, bandwidth); + double min_throughput = ((nfiles * block_size)/1048576.0) / (max_elapsed/1000000.0); + printf ("# Min: %.4f MB/sec Avg: %.4f MB/sec || Max: %.3f sec \n", min_throughput, bandwidth, max_elapsed/1000000.0); + printf ("# Max Track count: %d @ 48000SPS\n", (int) floor(1048576.0 * bandwidth / (4 * 48000.))); + printf ("# Sus Track count: %d @ 48000SPS\n", (int) floor(1048576.0 * min_throughput / (4 * 48000.))); + printf ("# seeks: %llu: bytes: %llu total_time: %f\n", cnt * nfiles, (nfiles * _read), total_time/1000000.0); + printf ("%d %.4f %.4f %.4f %.5f\n", block_size, min_throughput, bandwidth, max_elapsed/1000000.0, stddev/1000000.0); } return 0;