forked from luck/tmp_suning_uos_patched
100fdaee70
Impact: change task balancing to save power more agressively
Add SD_BALANCE_NEWIDLE flag at MC level and CPU level
if sched_mc is set. This helps power savings and
will not affect performance when sched_mc=0
Ingo and Mike Galbraith have optimised the SD flags by
removing SD_BALANCE_NEWIDLE at MC and CPU level. This
helps performance but hurts power savings since this
slows down task consolidation by reducing the number
of times load_balance is run.
sched: fine-tune SD_MC_INIT
commit 1480098470
Author: Mike Galbraith <efault@gmx.de>
Date: Fri Nov 7 15:26:50 2008 +0100
sched: re-tune balancing -- revert
commit 9fcd18c9e6
Author: Ingo Molnar <mingo@elte.hu>
Date: Wed Nov 5 16:52:08 2008 +0100
This patch selectively enables SD_BALANCE_NEWIDLE flag
only when sched_mc is set to 1 or 2. This helps power savings
by task consolidation and also does not hurt performance at
sched_mc=0 where all power saving optimisations are turned off.
Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
198 lines
5.4 KiB
C
198 lines
5.4 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) \
|
|
({ \
|
|
node_to_cpumask_ptr(__tmp__, node); \
|
|
cpus_weight(*__tmp__); \
|
|
})
|
|
#endif
|
|
|
|
#define for_each_node_with_cpus(node) \
|
|
for_each_online_node(node) \
|
|
if (nr_cpus_node(node))
|
|
|
|
int arch_update_cpu_topology(void);
|
|
|
|
/* Conform to ACPI 2.0 SLIT distance definitions */
|
|
#define LOCAL_DISTANCE 10
|
|
#define REMOTE_DISTANCE 20
|
|
#ifndef node_distance
|
|
#define node_distance(from,to) ((from) == (to) ? LOCAL_DISTANCE : REMOTE_DISTANCE)
|
|
#endif
|
|
#ifndef RECLAIM_DISTANCE
|
|
/*
|
|
* If the distance between nodes in a system is larger than RECLAIM_DISTANCE
|
|
* (in whatever arch specific measurement units returned by node_distance())
|
|
* then switch on zone reclaim on boot.
|
|
*/
|
|
#define RECLAIM_DISTANCE 20
|
|
#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.
|
|
* (Only non-zero and non-null fields need be specified.)
|
|
*/
|
|
|
|
#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) { \
|
|
.min_interval = 1, \
|
|
.max_interval = 2, \
|
|
.busy_factor = 64, \
|
|
.imbalance_pct = 110, \
|
|
.flags = SD_LOAD_BALANCE \
|
|
| SD_BALANCE_NEWIDLE \
|
|
| SD_BALANCE_FORK \
|
|
| SD_BALANCE_EXEC \
|
|
| SD_WAKE_AFFINE \
|
|
| SD_WAKE_BALANCE \
|
|
| SD_SHARE_CPUPOWER, \
|
|
.last_balance = jiffies, \
|
|
.balance_interval = 1, \
|
|
}
|
|
#endif
|
|
#endif /* CONFIG_SCHED_SMT */
|
|
|
|
#ifdef CONFIG_SCHED_MC
|
|
/* Common values for MC siblings. for now mostly derived from SD_CPU_INIT */
|
|
#ifndef SD_MC_INIT
|
|
#define SD_MC_INIT (struct sched_domain) { \
|
|
.min_interval = 1, \
|
|
.max_interval = 4, \
|
|
.busy_factor = 64, \
|
|
.imbalance_pct = 125, \
|
|
.cache_nice_tries = 1, \
|
|
.busy_idx = 2, \
|
|
.wake_idx = 1, \
|
|
.forkexec_idx = 1, \
|
|
.flags = SD_LOAD_BALANCE \
|
|
| SD_BALANCE_FORK \
|
|
| SD_BALANCE_EXEC \
|
|
| SD_WAKE_AFFINE \
|
|
| SD_WAKE_BALANCE \
|
|
| SD_SHARE_PKG_RESOURCES\
|
|
| sd_balance_for_mc_power()\
|
|
| sd_power_saving_flags(),\
|
|
.last_balance = jiffies, \
|
|
.balance_interval = 1, \
|
|
}
|
|
#endif
|
|
#endif /* CONFIG_SCHED_MC */
|
|
|
|
/* Common values for CPUs */
|
|
#ifndef SD_CPU_INIT
|
|
#define SD_CPU_INIT (struct sched_domain) { \
|
|
.min_interval = 1, \
|
|
.max_interval = 4, \
|
|
.busy_factor = 64, \
|
|
.imbalance_pct = 125, \
|
|
.cache_nice_tries = 1, \
|
|
.busy_idx = 2, \
|
|
.idle_idx = 1, \
|
|
.newidle_idx = 2, \
|
|
.wake_idx = 1, \
|
|
.forkexec_idx = 1, \
|
|
.flags = SD_LOAD_BALANCE \
|
|
| SD_BALANCE_EXEC \
|
|
| SD_BALANCE_FORK \
|
|
| SD_WAKE_AFFINE \
|
|
| SD_WAKE_BALANCE \
|
|
| sd_balance_for_package_power()\
|
|
| sd_power_saving_flags(),\
|
|
.last_balance = jiffies, \
|
|
.balance_interval = 1, \
|
|
}
|
|
#endif
|
|
|
|
/* sched_domains SD_ALLNODES_INIT for NUMA machines */
|
|
#define SD_ALLNODES_INIT (struct sched_domain) { \
|
|
.min_interval = 64, \
|
|
.max_interval = 64*num_online_cpus(), \
|
|
.busy_factor = 128, \
|
|
.imbalance_pct = 133, \
|
|
.cache_nice_tries = 1, \
|
|
.busy_idx = 3, \
|
|
.idle_idx = 3, \
|
|
.flags = SD_LOAD_BALANCE \
|
|
| SD_BALANCE_NEWIDLE \
|
|
| SD_WAKE_AFFINE \
|
|
| SD_SERIALIZE, \
|
|
.last_balance = jiffies, \
|
|
.balance_interval = 64, \
|
|
}
|
|
|
|
#ifdef CONFIG_NUMA
|
|
#ifndef SD_NODE_INIT
|
|
#error Please define an appropriate SD_NODE_INIT in include/asm/topology.h!!!
|
|
#endif
|
|
#endif /* CONFIG_NUMA */
|
|
|
|
#ifndef topology_physical_package_id
|
|
#define topology_physical_package_id(cpu) ((void)(cpu), -1)
|
|
#endif
|
|
#ifndef topology_core_id
|
|
#define topology_core_id(cpu) ((void)(cpu), 0)
|
|
#endif
|
|
#ifndef topology_thread_siblings
|
|
#define topology_thread_siblings(cpu) cpumask_of_cpu(cpu)
|
|
#endif
|
|
#ifndef topology_core_siblings
|
|
#define topology_core_siblings(cpu) cpumask_of_cpu(cpu)
|
|
#endif
|
|
|
|
#endif /* _LINUX_TOPOLOGY_H */
|