2 * Copyright (c) 2011 Martin Sucha
3 * Copyright (c) 2019 Vojtech Horky
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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.
34 #include <str_error.h>
37 #include "../benchlist.h"
39 #include "../params.h"
41 #define BUFFER_SIZE 4096
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.
48 static bool runner(stopwatch_t
*stopwatch
, uint64_t size
,
49 char *error
, size_t error_size
)
51 const char *path
= bench_param_get("filename", "/data/web/helenos.png");
53 char *buf
= malloc(BUFFER_SIZE
);
55 snprintf(error
, error_size
, "failed to allocate %dB buffer", BUFFER_SIZE
);
61 FILE *file
= fopen(path
, "r");
63 snprintf(error
, error_size
, "failed to open %s for reading: %s",
64 path
, str_error(errno
));
69 stopwatch_start(stopwatch
);
70 for (uint64_t i
= 0; i
< size
; i
++) {
71 int rc
= fseek(file
, 0, SEEK_SET
);
73 snprintf(error
, error_size
, "failed to rewind %s: %s",
74 path
, str_error(errno
));
79 fread(buf
, 1, BUFFER_SIZE
, file
);
81 snprintf(error
, error_size
, "failed to read from %s: %s",
82 path
, str_error(errno
));
88 stopwatch_stop(stopwatch
);
99 benchmark_t bench_file_read
= {
101 .desc
= "Sequentially read contents of a file (use 'filename' param to alter the default).",