1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright (C) 2017 Intel Corporation. 3 * All rights reserved. 4 */ 5 6 #include "spdk/stdinc.h" 7 8 #include "spdk/env.h" 9 #include "spdk/util.h" 10 #include "spdk/histogram_data.h" 11 12 /* 13 * This applications is a simple test app used to test the performance of 14 * tallying datapoints with struct spdk_histogram_data. It can be used 15 * to measure the effect of changes to the spdk_histogram_data implementation. 16 * 17 * There are no command line parameters currently - it just tallies 18 * datapoints for 10 seconds in a default-sized histogram structure and 19 * then prints out the number of tallies performed. 20 */ 21 22 static void 23 usage(const char *prog) 24 { 25 printf("usage: %s\n", prog); 26 printf("Options:\n"); 27 } 28 29 int 30 main(int argc, char **argv) 31 { 32 struct spdk_histogram_data *h; 33 struct spdk_env_opts opts; 34 uint64_t tsc[128], t, end_tsc, count; 35 uint32_t i; 36 int ch; 37 int rc = 0; 38 39 while ((ch = getopt(argc, argv, "")) != -1) { 40 switch (ch) { 41 default: 42 usage(argv[0]); 43 return 1; 44 } 45 } 46 47 opts.opts_size = sizeof(opts); 48 spdk_env_opts_init(&opts); 49 if (spdk_env_init(&opts)) { 50 printf("Err: Unable to initialize SPDK env\n"); 51 return 1; 52 } 53 54 for (i = 0; i < SPDK_COUNTOF(tsc); i++) { 55 tsc[i] = spdk_get_ticks(); 56 } 57 58 end_tsc = spdk_get_ticks() + (10 * spdk_get_ticks_hz()); 59 count = 0; 60 h = spdk_histogram_data_alloc(); 61 62 while (true) { 63 t = spdk_get_ticks(); 64 spdk_histogram_data_tally(h, t - tsc[count % 128]); 65 count++; 66 if (t > end_tsc) { 67 break; 68 } 69 } 70 71 printf("count = %ju\n", count); 72 spdk_histogram_data_free(h); 73 74 spdk_env_fini(); 75 return rc; 76 } 77