uspace/app/hbench/fs/fileread.c

   1 /*
   2  * Copyright (c) 2011 Martin Sucha
   3  * Copyright (c) 2019 Vojtech Horky
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * - Redistributions of source code must retain the above copyright
  11  *   notice, this list of conditions and the following disclaimer.
  12  * - Redistributions in binary form must reproduce the above copyright
  13  *   notice, this list of conditions and the following disclaimer in the
  14  *   documentation and/or other materials provided with the distribution.
  15  * - The name of the author may not be used to endorse or promote products
  16  *   derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 /** @addtogroup hbench
  31  * @{
  32  */
  33
  34 #include <str_error.h>
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include "../hbench.h"
  38
  39 #define BUFFER_SIZE 4096
  40
  41 /** Execute file reading benchmark.
  42  *
  43  * Note that while this benchmark tries to measure speed of file reading,
  44  * it rather measures speed of FS cache as it is highly probable that the
  45  * corresponding blocks would be cached after first run.
  46  */
  47 static bool runner(bench_env_t *env, bench_run_t *run, uint64_t size)
  48 {
  49         const char *path = bench_env_param_get(env, "filename", "/data/web/helenos.png");
  50
  51         char *buf = malloc(BUFFER_SIZE);
  52         if (buf == NULL) {
  53                 return bench_run_fail(run, "failed to allocate %dB buffer", BUFFER_SIZE);
  54         }
  55
  56         bool ret = true;
  57
  58         FILE *file = fopen(path, "r");
  59         if (file == NULL) {
  60                 bench_run_fail(run, "failed to open %s for reading: %s",
  61                     path, str_error(errno));
  62                 ret = false;
  63                 goto leave_free_buf;
  64         }
  65
  66         bench_run_start(run);
  67         for (uint64_t i = 0; i < size; i++) {
  68                 int rc = fseek(file, 0, SEEK_SET);
  69                 if (rc != 0) {
  70                         bench_run_fail(run, "failed to rewind %s: %s",
  71                             path, str_error(errno));
  72                         ret = false;
  73                         goto leave_close;
  74                 }
  75                 while (!feof(file)) {
  76                         fread(buf, 1, BUFFER_SIZE, file);
  77                         if (ferror(file)) {
  78                                 bench_run_fail(run, "failed to read from %s: %s",
  79                                     path, str_error(errno));
  80                                 ret = false;
  81                                 goto leave_close;
  82                         }
  83                 }
  84         }
  85         bench_run_stop(run);
  86
  87 leave_close:
  88         fclose(file);
  89
  90 leave_free_buf:
  91         free(buf);
  92
  93         return ret;
  94 }
  95
  96 benchmark_t benchmark_file_read = {
  97         .name = "file_read",
  98         .desc = "Sequentially read contents of a file (use 'filename' param to alter the default).",
  99         .entry = &runner,
 100         .setup = NULL,
 101         .teardown = NULL
 102 };
 103
 104 /**
 105  * @}
 106  */