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>
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@ -44,25 +44,64 @@ static inline const struct cpumask *cpumask_of_node(int node)
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/* For now, use numa node -1 for global allocation. */
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#define pcibus_to_node(bus) ((void)(bus), -1)
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/*
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* TILE architecture has many cores integrated in one processor, so we need
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* setup bigger balance_interval for both CPU/NODE scheduling domains to
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* reduce process scheduling costs.
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*/
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/* sched_domains SD_CPU_INIT for TILE architecture */
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#define SD_CPU_INIT (struct sched_domain) { \
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.min_interval = 4, \
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.max_interval = 128, \
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.busy_factor = 64, \
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.imbalance_pct = 125, \
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.cache_nice_tries = 1, \
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.busy_idx = 2, \
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.idle_idx = 1, \
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.newidle_idx = 0, \
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.wake_idx = 0, \
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.forkexec_idx = 0, \
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\
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.flags = 1*SD_LOAD_BALANCE \
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| 1*SD_BALANCE_NEWIDLE \
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| 1*SD_BALANCE_EXEC \
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| 1*SD_BALANCE_FORK \
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| 0*SD_BALANCE_WAKE \
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| 0*SD_WAKE_AFFINE \
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| 0*SD_PREFER_LOCAL \
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| 0*SD_SHARE_CPUPOWER \
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| 0*SD_SHARE_PKG_RESOURCES \
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| 0*SD_SERIALIZE \
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, \
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.last_balance = jiffies, \
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.balance_interval = 32, \
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}
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/* sched_domains SD_NODE_INIT for TILE architecture */
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#define SD_NODE_INIT (struct sched_domain) { \
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.min_interval = 8, \
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.max_interval = 32, \
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.busy_factor = 32, \
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.imbalance_pct = 125, \
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.cache_nice_tries = 1, \
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.busy_idx = 3, \
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.idle_idx = 1, \
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.newidle_idx = 2, \
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.wake_idx = 1, \
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.flags = SD_LOAD_BALANCE \
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| SD_BALANCE_NEWIDLE \
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| SD_BALANCE_EXEC \
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| SD_BALANCE_FORK \
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| SD_WAKE_AFFINE \
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| SD_SERIALIZE, \
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.last_balance = jiffies, \
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.balance_interval = 1, \
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#define SD_NODE_INIT (struct sched_domain) { \
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.min_interval = 16, \
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.max_interval = 512, \
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.busy_factor = 32, \
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.imbalance_pct = 125, \
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.cache_nice_tries = 1, \
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.busy_idx = 3, \
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.idle_idx = 1, \
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.newidle_idx = 2, \
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.wake_idx = 1, \
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.flags = 1*SD_LOAD_BALANCE \
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| 1*SD_BALANCE_NEWIDLE \
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| 1*SD_BALANCE_EXEC \
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| 1*SD_BALANCE_FORK \
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| 0*SD_BALANCE_WAKE \
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| 0*SD_WAKE_AFFINE \
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| 0*SD_PREFER_LOCAL \
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| 0*SD_SHARE_CPUPOWER \
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| 0*SD_SHARE_PKG_RESOURCES \
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| 1*SD_SERIALIZE \
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, \
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.last_balance = jiffies, \
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.balance_interval = 128, \
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}
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/* By definition, we create nodes based on online memory. */
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