08c183f31b
Large sched domains can be very expensive to scan. Add an option SD_SERIALIZE to the sched domain flags. If that flag is set then we make sure that no other such domain is being balanced. [akpm@osdl.org: build fix] Signed-off-by: Christoph Lameter <clameter@sgi.com> Cc: Peter Williams <pwil3058@bigpond.net.au> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Christoph Lameter <clameter@sgi.com> Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com> Cc: "Chen, Kenneth W" <kenneth.w.chen@intel.com> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
#ifndef _ASM_X86_64_TOPOLOGY_H
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#define _ASM_X86_64_TOPOLOGY_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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extern cpumask_t cpu_online_map;
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extern unsigned char cpu_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) (first_cpu(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) ((long)(bus->sysdata))
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#define pcibus_to_cpumask(bus) node_to_cpumask(pcibus_to_node(bus));
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#define numa_node_id() read_pda(nodenumber)
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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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.child = 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_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_SERIALIZE \
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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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#ifdef CONFIG_SMP
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#define topology_physical_package_id(cpu) (cpu_data[cpu].phys_proc_id)
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#define topology_core_id(cpu) (cpu_data[cpu].cpu_core_id)
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#define topology_core_siblings(cpu) (cpu_core_map[cpu])
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#define topology_thread_siblings(cpu) (cpu_sibling_map[cpu])
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#define mc_capable() (boot_cpu_data.x86_max_cores > 1)
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#define smt_capable() (smp_num_siblings > 1)
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#endif
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#include <asm-generic/topology.h>
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extern cpumask_t cpu_coregroup_map(int cpu);
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#endif
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