72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
/*
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<:copyright-BRCM:2011:DUAL/GPL:standard
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Copyright (c) 2011 Broadcom Corporation
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All Rights Reserved
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Unless you and Broadcom execute a separate written software license
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agreement governing use of this software, this software is licensed
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to you under the terms of the GNU General Public License version 2
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(the "GPL"), available at http://www.broadcom.com/licenses/GPLv2.php,
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with the following added to such license:
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As a special exception, the copyright holders of this software give
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you permission to link this software with independent modules, and
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to copy and distribute the resulting executable under terms of your
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choice, provided that you also meet, for each linked independent
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module, the terms and conditions of the license of that module.
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An independent module is a module which is not derived from this
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software. The special exception does not apply to any modifications
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of the software.
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Not withstanding the above, under no circumstances may you combine
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this software in any way with any other Broadcom software provided
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under a license other than the GPL, without Broadcom's express prior
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written consent.
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:>
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*/
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#ifndef _BCM_REALTIME_H_
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#define _BCM_REALTIME_H_
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/*
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* This file defines the real time priority levels used by the various
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* threads in the system. It is important that all threads coordinate
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* their priority levels so that the desired effect is achieved.
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* These priorities are also related cgroups, so check the cgroups
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* groupings and cpu allocations (if cgroups is enabled).
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*/
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/** highest priority threads in the system.
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*
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* Threads at this priority require the absolute minium latency. However,
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* they should only run very briefly (<2ms per run).
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* These threads should also run at sched policy FIFO.
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*/
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#define BCM_RTPRIO_HIGH 75
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/** priority for the voip DSP.
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*
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* Note this is not for all voip threads, just the DSP thread.
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* The other voice threads should be run at the other priorities that are
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* defined.
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*/
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#define BCM_RTPRIO_VOIPDSP 35
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/** priority for all data forwarding.
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*
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* This is for data and video streaming. Not clear if we need to split out
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* sub-categories here such as video, versus web data, versus voice.
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* Probably need to use cgroups if a system needs to handle many types of
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* streams.
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* Threads running at this priority should use sched policy Round-Robin.
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*/
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#define BCM_RTPRIO_DATA 5
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#endif /* _BCM_REALTIME_H_ */
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