Messages in this thread Patch in this message | | | From | Nikhil Rao <> | Subject | [PATCH v1 14/19] sched: change type of imbalance to be u64 | Date | Sun, 1 May 2011 18:19:12 -0700 |
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This patch changes the type of imbalance to be u64. With increased sched load resolution, it is possible for a runqueue to have a sched weight of 2^32, and imbalance needs to be updated to u64 to handle this case.
Signed-off-by: Nikhil Rao <ncrao@google.com> --- include/linux/sched.h | 2 +- kernel/sched_fair.c | 24 ++++++++++++------------ kernel/sched_stats.h | 2 +- 3 files changed, 14 insertions(+), 14 deletions(-)
diff --git a/include/linux/sched.h b/include/linux/sched.h index 546a418..2d9689a 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -945,10 +945,10 @@ struct sched_domain { #ifdef CONFIG_SCHEDSTATS /* load_balance() stats */ + u64 lb_imbalance[CPU_MAX_IDLE_TYPES]; unsigned int lb_count[CPU_MAX_IDLE_TYPES]; unsigned int lb_failed[CPU_MAX_IDLE_TYPES]; unsigned int lb_balanced[CPU_MAX_IDLE_TYPES]; - unsigned int lb_imbalance[CPU_MAX_IDLE_TYPES]; unsigned int lb_gained[CPU_MAX_IDLE_TYPES]; unsigned int lb_hot_gained[CPU_MAX_IDLE_TYPES]; unsigned int lb_nobusyg[CPU_MAX_IDLE_TYPES]; diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 3e01c8d..850e41b 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -2497,7 +2497,7 @@ static inline void update_sd_power_savings_stats(struct sched_group *group, * Else returns 0. */ static inline int check_power_save_busiest_group(struct sd_lb_stats *sds, - int this_cpu, unsigned long *imbalance) + int this_cpu, u64 *imbalance) { if (!sds->power_savings_balance) return 0; @@ -2526,7 +2526,7 @@ static inline void update_sd_power_savings_stats(struct sched_group *group, } static inline int check_power_save_busiest_group(struct sd_lb_stats *sds, - int this_cpu, unsigned long *imbalance) + int this_cpu, u64 *imbalance) { return 0; } @@ -2916,7 +2916,7 @@ int __weak arch_sd_sibling_asym_packing(void) */ static int check_asym_packing(struct sched_domain *sd, struct sd_lb_stats *sds, - int this_cpu, unsigned long *imbalance) + int this_cpu, u64 *imbalance) { int busiest_cpu; @@ -2943,8 +2943,8 @@ static int check_asym_packing(struct sched_domain *sd, * @this_cpu: The cpu at whose sched_domain we're performing load-balance. * @imbalance: Variable to store the imbalance. */ -static inline void fix_small_imbalance(struct sd_lb_stats *sds, - int this_cpu, unsigned long *imbalance) +static inline +void fix_small_imbalance(struct sd_lb_stats *sds, int this_cpu, u64 *imbalance) { u64 tmp, pwr_now = 0, pwr_move = 0; unsigned int imbn = 2; @@ -3014,8 +3014,8 @@ static inline void fix_small_imbalance(struct sd_lb_stats *sds, * @this_cpu: Cpu for which currently load balance is being performed. * @imbalance: The variable to store the imbalance. */ -static inline void calculate_imbalance(struct sd_lb_stats *sds, int this_cpu, - unsigned long *imbalance) +static inline +void calculate_imbalance(struct sd_lb_stats *sds, int this_cpu, u64 *imbalance) { u64 max_pull, load_above_capacity = ~0ULL; @@ -3103,9 +3103,9 @@ static inline void calculate_imbalance(struct sd_lb_stats *sds, int this_cpu, * put to idle by rebalancing its tasks onto our group. */ static struct sched_group * -find_busiest_group(struct sched_domain *sd, int this_cpu, - unsigned long *imbalance, enum cpu_idle_type idle, - const struct cpumask *cpus, int *balance) +find_busiest_group(struct sched_domain *sd, int this_cpu, u64 *imbalance, + enum cpu_idle_type idle, const struct cpumask *cpus, + int *balance) { struct sd_lb_stats sds; @@ -3202,7 +3202,7 @@ ret: */ static struct rq * find_busiest_queue(struct sched_domain *sd, struct sched_group *group, - enum cpu_idle_type idle, unsigned long imbalance, + enum cpu_idle_type idle, u64 imbalance, const struct cpumask *cpus) { struct rq *busiest = NULL, *rq; @@ -3308,7 +3308,7 @@ static int load_balance(int this_cpu, struct rq *this_rq, { int ld_moved, all_pinned = 0, active_balance = 0; struct sched_group *group; - unsigned long imbalance; + u64 imbalance; struct rq *busiest; unsigned long flags; struct cpumask *cpus = __get_cpu_var(load_balance_tmpmask); diff --git a/kernel/sched_stats.h b/kernel/sched_stats.h index 48ddf43..f44676c 100644 --- a/kernel/sched_stats.h +++ b/kernel/sched_stats.h @@ -46,7 +46,7 @@ static int show_schedstat(struct seq_file *seq, void *v) seq_printf(seq, "domain%d %s", dcount++, mask_str); for (itype = CPU_IDLE; itype < CPU_MAX_IDLE_TYPES; itype++) { - seq_printf(seq, " %u %u %u %u %u %u %u %u", + seq_printf(seq, " %u %u %u %llu %u %u %u %u", sd->lb_count[itype], sd->lb_balanced[itype], sd->lb_failed[itype], -- 1.7.3.1
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