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sched: convert BALANCE_FOR_xx_POWER to inline functions

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Impact: cleanup

BALANCE_FOR_MC_POWER and similar macros defined in sched.h are
not constants and have various condition checks and significant
amount of code that is not suitable to be contain in a macro.
Also there could be side effects on the expressions passed to
some of them like test_sd_parent().

This patch converts all complex macros related to power savings
balance to inline functions.

Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Vaidyanathan Srinivasan 2008-12-18 23:26:02 +05:30 committed by Ingo Molnar
parent 3b11ce7f54
commit 716707b299
2 changed files with 26 additions and 11 deletions
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33
include/linux/sched.h
View file

@ -763,15 +763,23 @@ enum cpu_idle_type {
#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)
extern int sched_mc_power_savings, sched_smt_power_savings;
#define BALANCE_FOR_PKG_POWER \
((sched_mc_power_savings || sched_smt_power_savings) ? \
SD_POWERSAVINGS_BALANCE : 0)
static inline int sd_balance_for_mc_power(void)
{
if (sched_smt_power_savings)
return SD_POWERSAVINGS_BALANCE;
#define test_sd_parent(sd, flag) ((sd->parent && \
(sd->parent->flags & flag)) ? 1 : 0)
return 0;
}
static inline int sd_balance_for_package_power(void)
{
if (sched_mc_power_savings | sched_smt_power_savings)
return SD_POWERSAVINGS_BALANCE;
return 0;
}
struct sched_group {
@ -1399,6 +1407,15 @@ struct task_struct {
#endif
};
/* Test a flag in parent sched domain */
static inline int test_sd_parent(struct sched_domain *sd, int flag)
{
if (sd->parent && (sd->parent->flags & flag))
return 1;
return 0;
}
/*
* Priority of a process goes from 0..MAX_PRIO-1, valid RT
* priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH
@ -2256,8 +2273,6 @@ __trace_special(void *__tr, void *__data,
extern long sched_setaffinity(pid_t pid, const struct cpumask *new_mask);
extern long sched_getaffinity(pid_t pid, struct cpumask *mask);
extern int sched_mc_power_savings, sched_smt_power_savings;
extern void normalize_rt_tasks(void);
#ifdef CONFIG_GROUP_SCHED

4
include/linux/topology.h
View file

@ -125,7 +125,7 @@ int arch_update_cpu_topology(void);
| SD_WAKE_AFFINE \
| SD_WAKE_BALANCE \
| SD_SHARE_PKG_RESOURCES\
| BALANCE_FOR_MC_POWER, \
| sd_balance_for_mc_power(),\
.last_balance = jiffies, \
.balance_interval = 1, \
}
@ -150,7 +150,7 @@ int arch_update_cpu_topology(void);
| SD_BALANCE_FORK \
| SD_WAKE_AFFINE \
| SD_WAKE_BALANCE \
| BALANCE_FOR_PKG_POWER,\
| sd_balance_for_package_power(),\
.last_balance = jiffies, \
.balance_interval = 1, \
}