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/* Copyright (c) 2017, ARM Limited. All rights reserved.
*
* Copyright (c) 2017-2018, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef ODP_SCHEDULE_SCALABLE_CONFIG_H_
#define ODP_SCHEDULE_SCALABLE_CONFIG_H_
/*
* Default scaling factor for the scheduler group
*
* This scaling factor is used when the application creates a scheduler
* group with no worker threads.
*/
#define CONFIG_DEFAULT_XFACTOR 4
/*
* Default weight (in events) for WRR in scalable scheduler
*
* This controls the per-queue weight for WRR between queues of the same
* priority in the scalable scheduler
* A higher value improves throughput while a lower value increases fairness
* and thus likely decreases latency
*
* If WRR is undesired, set the value to ~0 which will use the largest possible
* weight
*
* Note: an API for specifying this on a per-queue basis would be useful but is
* not yet available
*/
#define CONFIG_WRR_WEIGHT 64
/*
* Split queue producer/consumer metadata into separate cache lines.
* This is beneficial on e.g. Cortex-A57 but not so much on A53.
*/
#define CONFIG_SPLIT_PRODCONS
/*
* Use locks to protect queue (ring buffer) and scheduler state updates
* On x86, this decreases overhead noticeably.
*/
#if !defined(__arm__) && !defined(__aarch64__)
#define CONFIG_QSCHST_LOCK
/* Keep all ring buffer/qschst data together when using locks */
#undef CONFIG_SPLIT_PRODCONS
#endif
#endif /* ODP_SCHEDULE_SCALABLE_CONFIG_H_ */
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