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authorChristian Grothoff <christian@grothoff.org>2012-10-24 09:26:44 +0000
committerChristian Grothoff <christian@grothoff.org>2012-10-24 09:26:44 +0000
commit3bbb7d09f0f2d5f07a3ad7f90b179ddc6831f9a3 (patch)
treee7763da882d38eeebd72fa49e0bbb4edc5b84842 /src/util/perf_malloc.c
parent6f191f08a947e08d5d8ff842a29ba6f4b6611603 (diff)
downloadgnunet-3bbb7d09f0f2d5f07a3ad7f90b179ddc6831f9a3.tar.gz
gnunet-3bbb7d09f0f2d5f07a3ad7f90b179ddc6831f9a3.zip
-speeding up baadf00d code by 7x (on i7)
Diffstat (limited to 'src/util/perf_malloc.c')
-rw-r--r--src/util/perf_malloc.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/src/util/perf_malloc.c b/src/util/perf_malloc.c
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1/*
2 This file is part of GNUnet.
3 (C) 2012 Christian Grothoff (and other contributing authors)
4
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 2, or (at your
8 option) any later version.
9
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
19*/
20
21/**
22 * @author Christian Grothoff
23 * @file util/perf_malloc.c
24 * @brief measure performance of allocation functions
25 */
26#include "platform.h"
27#include "gnunet_common.h"
28#include "gnunet_crypto_lib.h"
29#include "gnunet_time_lib.h"
30#include <gauger.h>
31
32static uint64_t
33perfMalloc ()
34{
35 size_t i;
36 uint64_t ret;
37
38 ret = 0;
39 for (i=1;i<1024 * 1024;i+=1024)
40 {
41 ret += i;
42 GNUNET_free (GNUNET_malloc (i));
43 }
44 return ret;
45}
46
47
48int
49main (int argc, char *argv[])
50{
51 struct GNUNET_TIME_Absolute start;
52 uint64_t kb;
53
54 start = GNUNET_TIME_absolute_get ();
55 kb = perfMalloc ();
56 printf ("Malloc perf took %llu ms\n",
57 (unsigned long long)
58 GNUNET_TIME_absolute_get_duration (start).rel_value);
59 GAUGER ("UTIL", "Allocation",
60 kb / 1024 / (1 +
61 GNUNET_TIME_absolute_get_duration
62 (start).rel_value), "kb/s");
63 return 0;
64}
65
66/* end of perf_malloc.c */