72 lines
3.1 KiB
C
72 lines
3.1 KiB
C
/**
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* Copyright (c) 2010-2012 Broadcom. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The names of the above-listed copyright holders may not be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* ALTERNATIVELY, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2, as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef VCHI_CFG_INTERNAL_H_
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#define VCHI_CFG_INTERNAL_H_
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/****************************************************************************************
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* Control optimisation attempts.
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***************************************************************************************/
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// Don't use lots of short-term locks - use great long ones, reducing the overall locks-per-second
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#define VCHI_COARSE_LOCKING
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// Avoid lock then unlock on exit from blocking queue operations (msg tx, bulk rx/tx)
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// (only relevant if VCHI_COARSE_LOCKING)
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#define VCHI_ELIDE_BLOCK_EXIT_LOCK
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// Avoid lock on non-blocking peek
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// (only relevant if VCHI_COARSE_LOCKING)
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#define VCHI_AVOID_PEEK_LOCK
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// Use one slot-handler thread per connection, rather than 1 thread dealing with all connections in rotation.
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#define VCHI_MULTIPLE_HANDLER_THREADS
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// Put free descriptors onto the head of the free queue, rather than the tail, so that we don't thrash
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// our way through the pool of descriptors.
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#define VCHI_PUSH_FREE_DESCRIPTORS_ONTO_HEAD
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// Don't issue a MSG_AVAILABLE callback for every single message. Possibly only safe if VCHI_COARSE_LOCKING.
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#define VCHI_FEWER_MSG_AVAILABLE_CALLBACKS
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// Don't use message descriptors for TX messages that don't need them
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#define VCHI_MINIMISE_TX_MSG_DESCRIPTORS
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// Nano-locks for multiqueue
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//#define VCHI_MQUEUE_NANOLOCKS
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// Lock-free(er) dequeuing
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//#define VCHI_RX_NANOLOCKS
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#endif /*VCHI_CFG_INTERNAL_H_*/
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