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/
usr/
src/
linux-headers-3.0.0-14/
arch/
tile/
include/
asm/
- drwxr-xr-x
|
Viewing file:  topology.h (3.52 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/*
* Copyright 2010 Tilera Corporation. 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, version 2.
*
* 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.
*/
#ifndef _ASM_TILE_TOPOLOGY_H
#define _ASM_TILE_TOPOLOGY_H
#ifdef CONFIG_NUMA
#include <linux/cpumask.h>
/* Mappings between logical cpu number and node number. */
extern struct cpumask node_2_cpu_mask[];
extern char cpu_2_node[];
/* Returns the number of the node containing CPU 'cpu'. */
static inline int cpu_to_node(int cpu)
{
return cpu_2_node[cpu];
}
/*
* Returns the number of the node containing Node 'node'.
* This architecture is flat, so it is a pretty simple function!
*/
#define parent_node(node) (node)
/* Returns a bitmask of CPUs on Node 'node'. */
static inline const struct cpumask *cpumask_of_node(int node)
{
return &node_2_cpu_mask[node];
}
/* For now, use numa node -1 for global allocation. */
#define pcibus_to_node(bus) ((void)(bus), -1)
/*
* TILE architecture has many cores integrated in one processor, so we need
* setup bigger balance_interval for both CPU/NODE scheduling domains to
* reduce process scheduling costs.
*/
/* sched_domains SD_CPU_INIT for TILE architecture */
#define SD_CPU_INIT (struct sched_domain) { \
.min_interval = 4, \
.max_interval = 128, \
.busy_factor = 64, \
.imbalance_pct = 125, \
.cache_nice_tries = 1, \
.busy_idx = 2, \
.idle_idx = 1, \
.newidle_idx = 0, \
.wake_idx = 0, \
.forkexec_idx = 0, \
\
.flags = 1*SD_LOAD_BALANCE \
| 1*SD_BALANCE_NEWIDLE \
| 1*SD_BALANCE_EXEC \
| 1*SD_BALANCE_FORK \
| 0*SD_BALANCE_WAKE \
| 0*SD_WAKE_AFFINE \
| 0*SD_PREFER_LOCAL \
| 0*SD_SHARE_CPUPOWER \
| 0*SD_SHARE_PKG_RESOURCES \
| 0*SD_SERIALIZE \
, \
.last_balance = jiffies, \
.balance_interval = 32, \
}
/* sched_domains SD_NODE_INIT for TILE architecture */
#define SD_NODE_INIT (struct sched_domain) { \
.min_interval = 16, \
.max_interval = 512, \
.busy_factor = 32, \
.imbalance_pct = 125, \
.cache_nice_tries = 1, \
.busy_idx = 3, \
.idle_idx = 1, \
.newidle_idx = 2, \
.wake_idx = 1, \
.flags = 1*SD_LOAD_BALANCE \
| 1*SD_BALANCE_NEWIDLE \
| 1*SD_BALANCE_EXEC \
| 1*SD_BALANCE_FORK \
| 0*SD_BALANCE_WAKE \
| 0*SD_WAKE_AFFINE \
| 0*SD_PREFER_LOCAL \
| 0*SD_SHARE_CPUPOWER \
| 0*SD_SHARE_PKG_RESOURCES \
| 1*SD_SERIALIZE \
, \
.last_balance = jiffies, \
.balance_interval = 128, \
}
/* By definition, we create nodes based on online memory. */
#define node_has_online_mem(nid) 1
#endif /* CONFIG_NUMA */
#include <asm-generic/topology.h>
#ifdef CONFIG_SMP
#define topology_physical_package_id(cpu) ((void)(cpu), 0)
#define topology_core_id(cpu) (cpu)
#define topology_core_cpumask(cpu) ((void)(cpu), cpu_online_mask)
#define topology_thread_cpumask(cpu) cpumask_of(cpu)
/* indicates that pointers to the topology struct cpumask maps are valid */
#define arch_provides_topology_pointers yes
#endif
#endif /* _ASM_TILE_TOPOLOGY_H */
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