137 lines
3.8 KiB
C
137 lines
3.8 KiB
C
![]() |
/*
|
||
|
* include/linux/topology.h
|
||
|
*
|
||
|
* Written by: Matthew Dobson, IBM Corporation
|
||
|
*
|
||
|
* Copyright (C) 2002, IBM Corp.
|
||
|
*
|
||
|
* All rights reserved.
|
||
|
*
|
||
|
* This program is free software; you can redistribute it and/or modify
|
||
|
* it under the terms of the GNU General Public License as published by
|
||
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
* (at your option) any later version.
|
||
|
*
|
||
|
* This program is distributed in the hope that it will be useful, but
|
||
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
|
||
|
* NON INFRINGEMENT. See the GNU General Public License for more
|
||
|
* details.
|
||
|
*
|
||
|
* You should have received a copy of the GNU General Public License
|
||
|
* along with this program; if not, write to the Free Software
|
||
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||
|
*
|
||
|
* Send feedback to <colpatch@us.ibm.com>
|
||
|
*/
|
||
|
#ifndef _LINUX_TOPOLOGY_H
|
||
|
#define _LINUX_TOPOLOGY_H
|
||
|
|
||
|
#include <linux/cpumask.h>
|
||
|
#include <linux/bitops.h>
|
||
|
#include <linux/mmzone.h>
|
||
|
#include <linux/smp.h>
|
||
|
#include <asm/topology.h>
|
||
|
|
||
|
#ifndef node_has_online_mem
|
||
|
#define node_has_online_mem(nid) (1)
|
||
|
#endif
|
||
|
|
||
|
#ifndef nr_cpus_node
|
||
|
#define nr_cpus_node(node) \
|
||
|
({ \
|
||
|
cpumask_t __tmp__; \
|
||
|
__tmp__ = node_to_cpumask(node); \
|
||
|
cpus_weight(__tmp__); \
|
||
|
})
|
||
|
#endif
|
||
|
|
||
|
#define for_each_node_with_cpus(node) \
|
||
|
for_each_online_node(node) \
|
||
|
if (nr_cpus_node(node))
|
||
|
|
||
|
#ifndef node_distance
|
||
|
/* Conform to ACPI 2.0 SLIT distance definitions */
|
||
|
#define LOCAL_DISTANCE 10
|
||
|
#define REMOTE_DISTANCE 20
|
||
|
#define node_distance(from,to) ((from) == (to) ? LOCAL_DISTANCE : REMOTE_DISTANCE)
|
||
|
#endif
|
||
|
#ifndef PENALTY_FOR_NODE_WITH_CPUS
|
||
|
#define PENALTY_FOR_NODE_WITH_CPUS (1)
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* Below are the 3 major initializers used in building sched_domains:
|
||
|
* SD_SIBLING_INIT, for SMT domains
|
||
|
* SD_CPU_INIT, for SMP domains
|
||
|
* SD_NODE_INIT, for NUMA domains
|
||
|
*
|
||
|
* Any architecture that cares to do any tuning to these values should do so
|
||
|
* by defining their own arch-specific initializer in include/asm/topology.h.
|
||
|
* A definition there will automagically override these default initializers
|
||
|
* and allow arch-specific performance tuning of sched_domains.
|
||
|
*/
|
||
|
#ifdef CONFIG_SCHED_SMT
|
||
|
/* MCD - Do we really need this? It is always on if CONFIG_SCHED_SMT is,
|
||
|
* so can't we drop this in favor of CONFIG_SCHED_SMT?
|
||
|
*/
|
||
|
#define ARCH_HAS_SCHED_WAKE_IDLE
|
||
|
/* Common values for SMT siblings */
|
||
|
#ifndef SD_SIBLING_INIT
|
||
|
#define SD_SIBLING_INIT (struct sched_domain) { \
|
||
|
.span = CPU_MASK_NONE, \
|
||
|
.parent = NULL, \
|
||
|
.groups = NULL, \
|
||
|
.min_interval = 1, \
|
||
|
.max_interval = 2, \
|
||
|
.busy_factor = 8, \
|
||
|
.imbalance_pct = 110, \
|
||
|
.cache_hot_time = 0, \
|
||
|
.cache_nice_tries = 0, \
|
||
|
.per_cpu_gain = 25, \
|
||
|
.flags = SD_LOAD_BALANCE \
|
||
|
| SD_BALANCE_NEWIDLE \
|
||
|
| SD_BALANCE_EXEC \
|
||
|
| SD_WAKE_AFFINE \
|
||
|
| SD_WAKE_IDLE \
|
||
|
| SD_SHARE_CPUPOWER, \
|
||
|
.last_balance = jiffies, \
|
||
|
.balance_interval = 1, \
|
||
|
.nr_balance_failed = 0, \
|
||
|
}
|
||
|
#endif
|
||
|
#endif /* CONFIG_SCHED_SMT */
|
||
|
|
||
|
/* Common values for CPUs */
|
||
|
#ifndef SD_CPU_INIT
|
||
|
#define SD_CPU_INIT (struct sched_domain) { \
|
||
|
.span = CPU_MASK_NONE, \
|
||
|
.parent = NULL, \
|
||
|
.groups = NULL, \
|
||
|
.min_interval = 1, \
|
||
|
.max_interval = 4, \
|
||
|
.busy_factor = 64, \
|
||
|
.imbalance_pct = 125, \
|
||
|
.cache_hot_time = (5*1000000/2), \
|
||
|
.cache_nice_tries = 1, \
|
||
|
.per_cpu_gain = 100, \
|
||
|
.flags = SD_LOAD_BALANCE \
|
||
|
| SD_BALANCE_NEWIDLE \
|
||
|
| SD_BALANCE_EXEC \
|
||
|
| SD_WAKE_AFFINE \
|
||
|
| SD_WAKE_IDLE \
|
||
|
| SD_WAKE_BALANCE, \
|
||
|
.last_balance = jiffies, \
|
||
|
.balance_interval = 1, \
|
||
|
.nr_balance_failed = 0, \
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
#ifdef CONFIG_NUMA
|
||
|
#ifndef SD_NODE_INIT
|
||
|
#error Please define an appropriate SD_NODE_INIT in include/asm/topology.h!!!
|
||
|
#endif
|
||
|
#endif /* CONFIG_NUMA */
|
||
|
|
||
|
#endif /* _LINUX_TOPOLOGY_H */
|