tools/tests/libMicro/atomic.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms
   5  * of the Common Development and Distribution License
   6  * (the "License").  You may not use this file except
   7  * in compliance with the License.
   8  *
   9  * You can obtain a copy of the license at
  10  * src/OPENSOLARIS.LICENSE
  11  * or http://www.opensolaris.org/os/licensing.
  12  * See the License for the specific language governing
  13  * permissions and limitations under the License.
  14  *
  15  * When distributing Covered Code, include this CDDL
  16  * HEADER in each file and include the License file at
  17  * usr/src/OPENSOLARIS.LICENSE.  If applicable,
  18  * add the following below this CDDL HEADER, with the
  19  * fields enclosed by brackets "[]" replaced with your
  20  * own identifying information: Portions Copyright [yyyy]
  21  * [name of copyright owner]
  22  *
  23  * CDDL HEADER END
  24  */
  25
  26 /*
  27  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  28  * Use is subject to license terms.
  29  */
  30
  31 /*
  32  * benchmarks atomic add on Solaris - useful for platform comparisons.
  33  */
  34
  35 #include <unistd.h>
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include <atomic.h>
  39
  40 #include "libmicro.h"
  41
  42 int
  43 benchmark_init()
  44 {
  45         (void) sprintf(lm_usage, "note: measures atomic_add_32_nv()");
  46
  47         lm_tsdsize = 0;
  48
  49         return (0);
  50 }
  51
  52 static unsigned int value = 0;
  53
  54 /*ARGSUSED*/
  55 int
  56 benchmark(void *tsd, result_t *res)
  57 {
  58         unsigned int                    i;
  59         for (i = 0; i < lm_optB; i += 10) {
  60                 (void) atomic_add_32_nv(&value, 1);
  61                 (void) atomic_add_32_nv(&value, 1);
  62                 (void) atomic_add_32_nv(&value, 1);
  63                 (void) atomic_add_32_nv(&value, 1);
  64                 (void) atomic_add_32_nv(&value, 1);
  65                 (void) atomic_add_32_nv(&value, 1);
  66                 (void) atomic_add_32_nv(&value, 1);
  67                 (void) atomic_add_32_nv(&value, 1);
  68                 (void) atomic_add_32_nv(&value, 1);
  69                 (void) atomic_add_32_nv(&value, 1);
  70         }
  71         res->re_count = i;
  72
  73         return (0);
  74 }