| 1 | /*
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| 2 | * Copyright (c) 2011 Martin Sucha
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| 3 | * Copyright (c) 2019 Vojtech Horky
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| 4 | * All rights reserved.
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| 5 | *
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| 6 | * Redistribution and use in source and binary forms, with or without
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| 7 | * modification, are permitted provided that the following conditions
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| 8 | * are met:
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| 9 | *
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| 10 | * - Redistributions of source code must retain the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer.
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| 12 | * - Redistributions in binary form must reproduce the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer in the
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| 14 | * documentation and/or other materials provided with the distribution.
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| 15 | * - The name of the author may not be used to endorse or promote products
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| 16 | * derived from this software without specific prior written permission.
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| 17 | *
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| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 28 | */
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| 29 |
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| 30 | /** @addtogroup hbench
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| 31 | * @{
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| 32 | */
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| 33 |
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| 34 | #include <dirent.h>
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| 35 | #include <str_error.h>
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| 36 | #include <stdio.h>
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| 37 | #include <stdlib.h>
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| 38 | #include "../hbench.h"
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| 39 |
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| 40 | /** Execute directory listing benchmark.
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| 41 | *
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| 42 | * Note that while this benchmark tries to measure speed of direct
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| 43 | * read, it rather measures speed of FS cache as it is highly probable
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| 44 | * that the corresponding blocks would be cached after first run.
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| 45 | */
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| 46 | static bool runner(bench_env_t *env, bench_run_t *run, uint64_t size)
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| 47 | {
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| 48 | const char *path = bench_env_param_get(env, "dirname", "/");
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| 49 |
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| 50 | bench_run_start(run);
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| 51 | for (uint64_t i = 0; i < size; i++) {
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| 52 | DIR *dir = opendir(path);
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| 53 | if (dir == NULL) {
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| 54 | return bench_run_fail(run, "failed to open %s for reading: %s",
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| 55 | path, str_error(errno));
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| 56 | }
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| 57 |
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| 58 | struct dirent *dp;
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| 59 | while ((dp = readdir(dir))) {
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| 60 | /* Do nothing */
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| 61 | }
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| 62 |
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| 63 | closedir(dir);
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| 64 | }
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| 65 | bench_run_stop(run);
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| 66 |
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| 67 | return true;
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| 68 | }
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| 69 |
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| 70 | benchmark_t benchmark_dir_read = {
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| 71 | .name = "dir_read",
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| 72 | .desc = "Read contents of a directory (use 'dirname' param to alter the default).",
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| 73 | .entry = &runner,
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| 74 | .setup = NULL,
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| 75 | .teardown = NULL
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| 76 | };
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| 77 |
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| 78 | /**
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| 79 | * @}
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| 80 | */
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