41eab6f88f
Form 1 affinity allows multiple entries in ibm,associativity-reference-points which represent affinity domains in decreasing order of importance. The Linux concept of a node is always the first entry, but using the other values as an input to node_distance() allows the memory allocator to make better decisions on which node to go first when local memory has been exhausted. We keep things simple and create an array indexed by NUMA node, capped at 4 entries. Each time we lookup an associativity property we initialise the array which is overkill, but since we should only hit this path during boot it didn't seem worth adding a per node valid bit. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
135 lines
3.3 KiB
C
135 lines
3.3 KiB
C
#ifndef _ASM_POWERPC_TOPOLOGY_H
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#define _ASM_POWERPC_TOPOLOGY_H
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#ifdef __KERNEL__
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struct sys_device;
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struct device_node;
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#ifdef CONFIG_NUMA
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/*
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* Before going off node we want the VM to try and reclaim from the local
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* node. It does this if the remote distance is larger than RECLAIM_DISTANCE.
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* With the default REMOTE_DISTANCE of 20 and the default RECLAIM_DISTANCE of
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* 20, we never reclaim and go off node straight away.
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*
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* To fix this we choose a smaller value of RECLAIM_DISTANCE.
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*/
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#define RECLAIM_DISTANCE 10
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/*
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* Before going off node we want the VM to try and reclaim from the local
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* node. It does this if the remote distance is larger than RECLAIM_DISTANCE.
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* With the default REMOTE_DISTANCE of 20 and the default RECLAIM_DISTANCE of
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* 20, we never reclaim and go off node straight away.
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*
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* To fix this we choose a smaller value of RECLAIM_DISTANCE.
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*/
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#define RECLAIM_DISTANCE 10
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#include <asm/mmzone.h>
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static inline int cpu_to_node(int cpu)
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{
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return numa_cpu_lookup_table[cpu];
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}
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#define parent_node(node) (node)
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#define cpumask_of_node(node) ((node) == -1 ? \
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cpu_all_mask : \
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node_to_cpumask_map[node])
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int of_node_to_nid(struct device_node *device);
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struct pci_bus;
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#ifdef CONFIG_PCI
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extern int pcibus_to_node(struct pci_bus *bus);
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#else
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static inline int pcibus_to_node(struct pci_bus *bus)
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{
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return -1;
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}
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#endif
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#define cpumask_of_pcibus(bus) (pcibus_to_node(bus) == -1 ? \
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cpu_all_mask : \
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cpumask_of_node(pcibus_to_node(bus)))
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/* sched_domains SD_NODE_INIT for PPC64 machines */
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#define SD_NODE_INIT (struct sched_domain) { \
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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 = 1, \
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.busy_idx = 3, \
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.idle_idx = 1, \
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.newidle_idx = 0, \
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.wake_idx = 0, \
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.forkexec_idx = 0, \
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\
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.flags = 1*SD_LOAD_BALANCE \
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| 1*SD_BALANCE_NEWIDLE \
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| 1*SD_BALANCE_EXEC \
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| 1*SD_BALANCE_FORK \
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| 0*SD_BALANCE_WAKE \
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| 0*SD_WAKE_AFFINE \
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| 0*SD_PREFER_LOCAL \
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| 0*SD_SHARE_CPUPOWER \
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| 0*SD_POWERSAVINGS_BALANCE \
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| 0*SD_SHARE_PKG_RESOURCES \
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| 1*SD_SERIALIZE \
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| 0*SD_PREFER_SIBLING \
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, \
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.last_balance = jiffies, \
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.balance_interval = 1, \
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}
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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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extern void __init dump_numa_cpu_topology(void);
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extern int sysfs_add_device_to_node(struct sys_device *dev, int nid);
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extern void sysfs_remove_device_from_node(struct sys_device *dev, int nid);
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#else
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static inline int of_node_to_nid(struct device_node *device)
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{
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return 0;
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}
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static inline void dump_numa_cpu_topology(void) {}
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static inline int sysfs_add_device_to_node(struct sys_device *dev, int nid)
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{
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return 0;
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}
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static inline void sysfs_remove_device_from_node(struct sys_device *dev,
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int nid)
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{
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}
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#endif /* CONFIG_NUMA */
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#include <asm-generic/topology.h>
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#ifdef CONFIG_SMP
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#include <asm/cputable.h>
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#define smt_capable() (cpu_has_feature(CPU_FTR_SMT))
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#ifdef CONFIG_PPC64
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#include <asm/smp.h>
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#define topology_thread_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu))
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#define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu))
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#define topology_core_id(cpu) (cpu_to_core_id(cpu))
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#endif
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#endif
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#endif /* __KERNEL__ */
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#endif /* _ASM_POWERPC_TOPOLOGY_H */
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