mirror of
https://github.com/FEX-Emu/linux.git
synced 2025-01-05 00:41:23 +00:00
147cbb4bbe
Reimplement the balance on exec balancing to be sched-domains aware. Use this to also do balance on fork balancing. Make x86_64 do balance on fork over the NUMA domain. The problem that the non sched domains aware blancing became apparent on dual core, multi socket opterons. What we want is for the new tasks to be sent to a different socket, but more often than not, we would first load up our sibling core, or fill two cores of a single remote socket before selecting a new one. This gives large improvements to STREAM on such systems. 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>
64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
#ifndef _ASM_X86_64_TOPOLOGY_H
|
|
#define _ASM_X86_64_TOPOLOGY_H
|
|
|
|
#include <linux/config.h>
|
|
|
|
#ifdef CONFIG_NUMA
|
|
|
|
#include <asm/mpspec.h>
|
|
#include <asm/bitops.h>
|
|
|
|
/* Map the K8 CPU local memory controllers to a simple 1:1 CPU:NODE topology */
|
|
|
|
extern cpumask_t cpu_online_map;
|
|
|
|
extern unsigned char cpu_to_node[];
|
|
extern unsigned char pci_bus_to_node[];
|
|
extern cpumask_t node_to_cpumask[];
|
|
|
|
#ifdef CONFIG_ACPI_NUMA
|
|
extern int __node_distance(int, int);
|
|
#define node_distance(a,b) __node_distance(a,b)
|
|
/* #else fallback version */
|
|
#endif
|
|
|
|
#define cpu_to_node(cpu) (cpu_to_node[cpu])
|
|
#define parent_node(node) (node)
|
|
#define node_to_first_cpu(node) (__ffs(node_to_cpumask[node]))
|
|
#define node_to_cpumask(node) (node_to_cpumask[node])
|
|
#define pcibus_to_node(bus) pci_bus_to_node[(bus)->number]
|
|
#define pcibus_to_cpumask(bus) node_to_cpumask(pcibus_to_node(bus));
|
|
|
|
/* sched_domains SD_NODE_INIT for x86_64 machines */
|
|
#define SD_NODE_INIT (struct sched_domain) { \
|
|
.span = CPU_MASK_NONE, \
|
|
.parent = NULL, \
|
|
.groups = NULL, \
|
|
.min_interval = 8, \
|
|
.max_interval = 32, \
|
|
.busy_factor = 32, \
|
|
.imbalance_pct = 125, \
|
|
.cache_hot_time = (10*1000000), \
|
|
.cache_nice_tries = 2, \
|
|
.busy_idx = 3, \
|
|
.idle_idx = 2, \
|
|
.newidle_idx = 1, \
|
|
.wake_idx = 1, \
|
|
.forkexec_idx = 1, \
|
|
.per_cpu_gain = 100, \
|
|
.flags = SD_LOAD_BALANCE \
|
|
| SD_BALANCE_NEWIDLE \
|
|
| SD_BALANCE_FORK \
|
|
| SD_BALANCE_EXEC \
|
|
| SD_WAKE_BALANCE, \
|
|
.last_balance = jiffies, \
|
|
.balance_interval = 1, \
|
|
.nr_balance_failed = 0, \
|
|
}
|
|
|
|
#endif
|
|
|
|
#include <asm-generic/topology.h>
|
|
|
|
#endif
|