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sched, cpuset: customize sched domains, core

Browse source 
[rebased for sched-devel/latest]

 - Add a new cpuset file, having levels:
     sched_relax_domain_level

 - Modify partition_sched_domains() and build_sched_domains()
   to take attributes parameter passed from cpuset.

 - Fill newidle_idx for node domains which currently unused but
   might be required if sched_relax_domain_level become higher.

 - We can change the default level by boot option 'relax_domain_level='.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Hidetoshi Seto 2008-04-15 14:04:23 +09:00 • committed by Ingo Molnar
parent 4d5f35533f
commit 1d3504fcf5
7 changed files with 161 additions and 11 deletions
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23
include/linux/sched.h
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@ -704,6 +704,7 @@ enum cpu_idle_type {
#define SD_POWERSAVINGS_BALANCE 256 /* Balance for power savings */
#define SD_SHARE_PKG_RESOURCES 512 /* Domain members share cpu pkg resources */
#define SD_SERIALIZE 1024 /* Only a single load balancing instance */
#define SD_WAKE_IDLE_FAR 2048 /* Gain latency sacrificing cache hit */
#define BALANCE_FOR_MC_POWER \
(sched_smt_power_savings ? SD_POWERSAVINGS_BALANCE : 0)
@ -733,6 +734,24 @@ struct sched_group {
u32 reciprocal_cpu_power;
};
enum sched_domain_level {
SD_LV_NONE = 0,
SD_LV_SIBLING,
SD_LV_MC,
SD_LV_CPU,
SD_LV_NODE,
SD_LV_ALLNODES,
SD_LV_MAX
};
struct sched_domain_attr {
int relax_domain_level;
};
#define SD_ATTR_INIT (struct sched_domain_attr) { \
.relax_domain_level = -1, \
}
struct sched_domain {
/* These fields must be setup */
struct sched_domain *parent; /* top domain must be null terminated */
@ -750,6 +769,7 @@ struct sched_domain {
unsigned int wake_idx;
unsigned int forkexec_idx;
int flags; /* See SD_* */
enum sched_domain_level level;
/* Runtime fields. */
unsigned long last_balance; /* init to jiffies. units in jiffies */
@ -789,7 +809,8 @@ struct sched_domain {
#endif
};
extern void partition_sched_domains(int ndoms_new, cpumask_t *doms_new);
extern void partition_sched_domains(int ndoms_new, cpumask_t *doms_new,
struct sched_domain_attr *dattr_new);
extern int arch_reinit_sched_domains(void);
#endif /* CONFIG_SMP */