Attachment 195229 Details for Bug 223914 – truckman's proposed patch to ULE load balancer

[patch] truckman's proposed patch to ULE load balancer

balance.patch (text/plain), 991 bytes, created by Don Lewis on 2018-07-18 05:56:17 UTC

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Creator: Don Lewis

Created: 2018-07-18 05:56:17 UTC

Size: 991 bytes

patch

obsolete

>Index: sys/kern/sched_ule.c
>===================================================================
>--- sys/kern/sched_ule.c	(revision 336438)
>+++ sys/kern/sched_ule.c	(working copy)
>@@ -884,9 +884,6 @@
> {
> 	struct tdq *tdq;
> 
>-	if (smp_started == 0 || rebalance == 0)
>-		return;
>-
> 	balance_ticks = max(balance_interval / 2, 1) +
> 	    (sched_random() % balance_interval);
> 	tdq = TDQ_SELF();
>@@ -1413,7 +1410,6 @@
> 			panic("Can't find cpu group for %d\n", i);
> 	}
> 	balance_tdq = TDQ_SELF();
>-	sched_balance();
> }
> #endif
> 
>@@ -1474,6 +1470,7 @@
> 	 * what realstathz is.
> 	 */
> 	balance_interval = realstathz;
>+	balance_ticks = balance_interval;
> 	affinity = SCHED_AFFINITY_DEFAULT;
> #endif
> 	if (sched_idlespinthresh < 0)
>@@ -2382,7 +2379,7 @@
> 	/*
> 	 * We run the long term load balancer infrequently on the first cpu.
> 	 */
>-	if (balance_tdq == tdq) {
>+	if (balance_tdq == tdq && smp_started != 0 && rebalance != 0) {
> 		if (balance_ticks && --balance_ticks == 0)
> 			sched_balance();
> 	}

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Attachments on bug 223914: 188323 | 195229