From be43b79fcabb7551677e2d27c75e2a500e2ba622 Mon Sep 17 00:00:00 2001 From: Sebastian Huber Date: Mon, 22 Sep 2014 13:42:26 +0200 Subject: Replace RTEMS objects with custom implementation Performance analysis revealed that the standard RTEMS objects are a major bottleneck. The object get mechanism and attribute checks at runtime have a significant overhead. Use a custom implementation for synchronization primitives. This drops also the size of the synchronization primitives considerably. --- rtemsbsd/include/machine/rtems-bsd-mutex.h | 60 ++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 rtemsbsd/include/machine/rtems-bsd-mutex.h (limited to 'rtemsbsd/include/machine/rtems-bsd-mutex.h') diff --git a/rtemsbsd/include/machine/rtems-bsd-mutex.h b/rtemsbsd/include/machine/rtems-bsd-mutex.h new file mode 100644 index 00000000..58b16f2c --- /dev/null +++ b/rtemsbsd/include/machine/rtems-bsd-mutex.h @@ -0,0 +1,60 @@ +/** + * @file + * + * @ingroup rtems_bsd_machine + * + * @brief TODO. + */ + +/* + * Copyright (c) 2014 embedded brains GmbH. All rights reserved. + * + * embedded brains GmbH + * Dornierstr. 4 + * 82178 Puchheim + * Germany + * + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef _RTEMS_BSD_MACHINE_RTEMS_BSD_MUTEX_H_ +#define _RTEMS_BSD_MACHINE_RTEMS_BSD_MUTEX_H_ + +#include +#include + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +typedef struct { + Thread_Control *owner; + int nest_level; + RBTree_Control rivals; +} rtems_bsd_mutex; + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif /* _RTEMS_BSD_MACHINE_RTEMS_BSD_MUTEX_H_ */ -- cgit v1.2.3