uspace/app/perf/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 perf
  31  * @{
  32  */
  33
  34 #include <str_error.h>
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include "../benchlist.h"
  38 #include "../perf.h"
  39 #include "../params.h"
  40
  41 #define BUFFER_SIZE 4096
  42
  43 /*
  44  * Note that while this benchmark tries to measure speed of file reading,
  45  * it rather measures speed of FS cache as it is highly probable that the
  46  * corresponding blocks would be cached after first run.
  47  */
  48 static bool runner(stopwatch_t *stopwatch, uint64_t size,
  49     char *error, size_t error_size)
  50 {
  51         const char *path = bench_param_get("filename", "/data/web/helenos.png");
  52
  53         char *buf = malloc(BUFFER_SIZE);
  54         if (buf == NULL) {
  55                 snprintf(error, error_size, "failed to allocate %dB buffer", BUFFER_SIZE);
  56                 return false;
  57         }
  58
  59         bool ret = true;
  60
  61         FILE *file = fopen(path, "r");
  62         if (file == NULL) {
  63                 snprintf(error, error_size, "failed to open %s for reading: %s",
  64                     path, str_error(errno));
  65                 ret = false;
  66                 goto leave_free_buf;
  67         }
  68
  69         stopwatch_start(stopwatch);
  70         for (uint64_t i = 0; i < size; i++) {
  71                 int rc = fseek(file, 0, SEEK_SET);
  72                 if (rc != 0) {
  73                         snprintf(error, error_size, "failed to rewind %s: %s",
  74                             path, str_error(errno));
  75                         ret = false;
  76                         goto leave_close;
  77                 }
  78                 while (!feof(file)) {
  79                         fread(buf, 1, BUFFER_SIZE, file);
  80                         if (ferror(file)) {
  81                                 snprintf(error, error_size, "failed to read from %s: %s",
  82                                     path, str_error(errno));
  83                                 ret = false;
  84                                 goto leave_close;
  85                         }
  86                 }
  87         }
  88         stopwatch_stop(stopwatch);
  89
  90 leave_close:
  91         fclose(file);
  92
  93 leave_free_buf:
  94         free(buf);
  95
  96         return ret;
  97 }
  98
  99 benchmark_t bench_file_read = {
 100         .name = "file_read",
 101         .desc = "Sequentially read contents of a file (use 'filename' param to alter the default).",
 102         .entry = &runner,
 103         .setup = NULL,
 104         .teardown = NULL
 105 };
 106
 107 /**
 108  * @}
 109  */