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arch/tile: disable SD_WAKE_AFFINE flag on CPU/NODE scheduling domain 

This allows processes to spread more effectively to multiple cores
(particularly important on 64-core chips!).

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This commit is contained in:
Chris Metcalf 2011-05-02 15:22:18 -04:00
parent df29ccb6c0
commit 7194988fb5
1 changed files with 57 additions and 18 deletions
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75
arch/tile/include/asm/topology.h
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@ -44,25 +44,64 @@ static inline const struct cpumask *cpumask_of_node(int node)
/* For now, use numa node -1 for global allocation. */
#define pcibus_to_node(bus) ((void)(bus), -1)
/*
* TILE architecture has many cores integrated in one processor, so we need
* setup bigger balance_interval for both CPU/NODE scheduling domains to
* reduce process scheduling costs.
*/
/* sched_domains SD_CPU_INIT for TILE architecture */
#define SD_CPU_INIT (struct sched_domain) { \
.min_interval = 4, \
.max_interval = 128, \
.busy_factor = 64, \
.imbalance_pct = 125, \
.cache_nice_tries = 1, \
.busy_idx = 2, \
.idle_idx = 1, \
.newidle_idx = 0, \
.wake_idx = 0, \
.forkexec_idx = 0, \
\
.flags = 1*SD_LOAD_BALANCE \
| 1*SD_BALANCE_NEWIDLE \
| 1*SD_BALANCE_EXEC \
| 1*SD_BALANCE_FORK \
| 0*SD_BALANCE_WAKE \
| 0*SD_WAKE_AFFINE \
| 0*SD_PREFER_LOCAL \
| 0*SD_SHARE_CPUPOWER \
| 0*SD_SHARE_PKG_RESOURCES \
| 0*SD_SERIALIZE \
, \
.last_balance = jiffies, \
.balance_interval = 32, \
}
/* sched_domains SD_NODE_INIT for TILE architecture */
#define SD_NODE_INIT (struct sched_domain) { \
.min_interval = 8, \
.max_interval = 32, \
.busy_factor = 32, \
.imbalance_pct = 125, \
.cache_nice_tries = 1, \
.busy_idx = 3, \
.idle_idx = 1, \
.newidle_idx = 2, \
.wake_idx = 1, \
.flags = SD_LOAD_BALANCE \
| SD_BALANCE_NEWIDLE \
| SD_BALANCE_EXEC \
| SD_BALANCE_FORK \
| SD_WAKE_AFFINE \
| SD_SERIALIZE, \
.last_balance = jiffies, \
.balance_interval = 1, \
#define SD_NODE_INIT (struct sched_domain) { \
.min_interval = 16, \
.max_interval = 512, \
.busy_factor = 32, \
.imbalance_pct = 125, \
.cache_nice_tries = 1, \
.busy_idx = 3, \
.idle_idx = 1, \
.newidle_idx = 2, \
.wake_idx = 1, \
.flags = 1*SD_LOAD_BALANCE \
| 1*SD_BALANCE_NEWIDLE \
| 1*SD_BALANCE_EXEC \
| 1*SD_BALANCE_FORK \
| 0*SD_BALANCE_WAKE \
| 0*SD_WAKE_AFFINE \
| 0*SD_PREFER_LOCAL \
| 0*SD_SHARE_CPUPOWER \
| 0*SD_SHARE_PKG_RESOURCES \
| 1*SD_SERIALIZE \
, \
.last_balance = jiffies, \
.balance_interval = 128, \
}
/* By definition, we create nodes based on online memory. */