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https://github.com/torvalds/linux
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687f1661d3
Do some basic initial tuning. Signed-off-by: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
#ifndef _ASM_X86_64_TOPOLOGY_H
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#define _ASM_X86_64_TOPOLOGY_H
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#include <linux/config.h>
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#ifdef CONFIG_NUMA
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#include <asm/mpspec.h>
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#include <asm/bitops.h>
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/* Map the K8 CPU local memory controllers to a simple 1:1 CPU:NODE topology */
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extern cpumask_t cpu_online_map;
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extern unsigned char cpu_to_node[];
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extern unsigned char pci_bus_to_node[];
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extern cpumask_t node_to_cpumask[];
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#ifdef CONFIG_ACPI_NUMA
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extern int __node_distance(int, int);
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#define node_distance(a,b) __node_distance(a,b)
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/* #else fallback version */
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#endif
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#define cpu_to_node(cpu) (cpu_to_node[cpu])
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#define parent_node(node) (node)
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#define node_to_first_cpu(node) (__ffs(node_to_cpumask[node]))
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#define node_to_cpumask(node) (node_to_cpumask[node])
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#define pcibus_to_node(bus) pci_bus_to_node[(bus)->number]
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#define pcibus_to_cpumask(bus) node_to_cpumask(pcibus_to_node(bus));
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/* sched_domains SD_NODE_INIT for x86_64 machines */
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#define SD_NODE_INIT (struct sched_domain) { \
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.span = CPU_MASK_NONE, \
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.parent = NULL, \
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.groups = NULL, \
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.min_interval = 8, \
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.max_interval = 32, \
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.busy_factor = 32, \
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.imbalance_pct = 125, \
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.cache_hot_time = (10*1000000), \
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.cache_nice_tries = 2, \
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.busy_idx = 3, \
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.idle_idx = 2, \
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.newidle_idx = 0, \
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.wake_idx = 1, \
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.forkexec_idx = 1, \
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.per_cpu_gain = 100, \
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.flags = SD_LOAD_BALANCE \
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| SD_BALANCE_FORK \
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| SD_BALANCE_EXEC \
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| SD_WAKE_BALANCE, \
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.last_balance = jiffies, \
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.balance_interval = 1, \
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.nr_balance_failed = 0, \
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}
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#endif
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#include <asm-generic/topology.h>
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#endif
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