[PATCH] sched: mc/smt power savings sched policy
[linux-2.6.git] / include / asm-ia64 / topology.h
1 /*
2  * linux/include/asm-ia64/topology.h
3  *
4  * Copyright (C) 2002, Erich Focht, NEC
5  *
6  * All rights reserved.
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  */
13 #ifndef _ASM_IA64_TOPOLOGY_H
14 #define _ASM_IA64_TOPOLOGY_H
15
16 #include <asm/acpi.h>
17 #include <asm/numa.h>
18 #include <asm/smp.h>
19
20 #ifdef CONFIG_NUMA
21
22 /* Nodes w/o CPUs are preferred for memory allocations, see build_zonelists */
23 #define PENALTY_FOR_NODE_WITH_CPUS 255
24
25 /*
26  * Distance above which we begin to use zone reclaim
27  */
28 #define RECLAIM_DISTANCE 15
29
30 /*
31  * Returns the number of the node containing CPU 'cpu'
32  */
33 #define cpu_to_node(cpu) (int)(cpu_to_node_map[cpu])
34
35 /*
36  * Returns a bitmask of CPUs on Node 'node'.
37  */
38 #define node_to_cpumask(node) (node_to_cpu_mask[node])
39
40 /*
41  * Returns the number of the node containing Node 'nid'.
42  * Not implemented here. Multi-level hierarchies detected with
43  * the help of node_distance().
44  */
45 #define parent_node(nid) (nid)
46
47 /*
48  * Returns the number of the first CPU on Node 'node'.
49  */
50 #define node_to_first_cpu(node) (first_cpu(node_to_cpumask(node)))
51
52 /*
53  * Determines the node for a given pci bus
54  */
55 #define pcibus_to_node(bus) PCI_CONTROLLER(bus)->node
56
57 void build_cpu_to_node_map(void);
58
59 #define SD_CPU_INIT (struct sched_domain) {             \
60         .span                   = CPU_MASK_NONE,        \
61         .parent                 = NULL,                 \
62         .groups                 = NULL,                 \
63         .min_interval           = 1,                    \
64         .max_interval           = 4,                    \
65         .busy_factor            = 64,                   \
66         .imbalance_pct          = 125,                  \
67         .per_cpu_gain           = 100,                  \
68         .cache_nice_tries       = 2,                    \
69         .busy_idx               = 2,                    \
70         .idle_idx               = 1,                    \
71         .newidle_idx            = 2,                    \
72         .wake_idx               = 1,                    \
73         .forkexec_idx           = 1,                    \
74         .flags                  = SD_LOAD_BALANCE       \
75                                 | SD_BALANCE_NEWIDLE    \
76                                 | SD_BALANCE_EXEC       \
77                                 | SD_WAKE_AFFINE,       \
78         .last_balance           = jiffies,              \
79         .balance_interval       = 1,                    \
80         .nr_balance_failed      = 0,                    \
81 }
82
83 /* sched_domains SD_NODE_INIT for IA64 NUMA machines */
84 #define SD_NODE_INIT (struct sched_domain) {            \
85         .span                   = CPU_MASK_NONE,        \
86         .parent                 = NULL,                 \
87         .groups                 = NULL,                 \
88         .min_interval           = 8,                    \
89         .max_interval           = 8*(min(num_online_cpus(), 32)), \
90         .busy_factor            = 64,                   \
91         .imbalance_pct          = 125,                  \
92         .cache_nice_tries       = 2,                    \
93         .busy_idx               = 3,                    \
94         .idle_idx               = 2,                    \
95         .newidle_idx            = 0, /* unused */       \
96         .wake_idx               = 1,                    \
97         .forkexec_idx           = 1,                    \
98         .per_cpu_gain           = 100,                  \
99         .flags                  = SD_LOAD_BALANCE       \
100                                 | SD_BALANCE_EXEC       \
101                                 | SD_BALANCE_FORK       \
102                                 | SD_WAKE_BALANCE,      \
103         .last_balance           = jiffies,              \
104         .balance_interval       = 64,                   \
105         .nr_balance_failed      = 0,                    \
106 }
107
108 #endif /* CONFIG_NUMA */
109
110 #ifdef CONFIG_SMP
111 #define topology_physical_package_id(cpu)       (cpu_data(cpu)->socket_id)
112 #define topology_core_id(cpu)                   (cpu_data(cpu)->core_id)
113 #define topology_core_siblings(cpu)             (cpu_core_map[cpu])
114 #define topology_thread_siblings(cpu)           (cpu_sibling_map[cpu])
115 #define smt_capable()                           (smp_num_siblings > 1)
116 #endif
117
118 #include <asm-generic/topology.h>
119
120 #endif /* _ASM_IA64_TOPOLOGY_H */