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Date: Tue, 14 Nov 2006 14:35:42 -0800 From: "Siddha, Suresh B" <suresh.b.siddha@...el.com> To: mingo@...e.hu, nickpiggin@...oo.com.au, akpm@...l.org Cc: linux-kernel@...r.kernel.org, clameter@....com, kenneth.w.chen@...el.com Subject: [patch] sched domain: increase the SMT busy rebalance interval With SMT, if the logical processor is busy, load balance happens for every 8msec(min)-16msec(max). There is no need to do this often, as this is just for fairness(to maintain uniform runqueue lengths) and default time slice anyhow is 100msec. Appended patch increases this interval to 64msec(min)-128msec(max) when the logical processor is busy. Signed-off-by: Suresh Siddha <suresh.b.siddha@...el.com> --- diff --git a/include/linux/topology.h b/include/linux/topology.h index da508d1..b93bb6c 100644 --- a/include/linux/topology.h +++ b/include/linux/topology.h @@ -93,7 +93,7 @@ #define SD_SIBLING_INIT (struct sched_do .groups = NULL, \ .min_interval = 1, \ .max_interval = 2, \ - .busy_factor = 8, \ + .busy_factor = 64, \ .imbalance_pct = 110, \ .cache_nice_tries = 0, \ .per_cpu_gain = 25, \ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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