On Monday 05 December 2005 11:54, Con Kolivas wrote: > Here is an updated rollup patch for current dynticks on i386. > > The main change to this version is the inclusion of Dominik's patches to > cpufreq ondemand, acpi c-states and bus mastering which should start making > the potential power saving features of dyntick a reality (thanks!). > One buildfix for !CONFIG_NO_IDLE_HZ as well. > > If you get strange stalls with this patch then almost certainly it is a > problem with dynticks and your apic so booting with the "noapic" option > should fix it. > > Split out patches, timertop and pmstats utilities and latest patch > available here: > http://ck.kolivas.org/patches/dyn-ticks/ > > FAQ: > What Hz should I use with dynticks in the config? > 1000 to realise the benefits of the power saving features and low latency. > > Should I enable timer statistics? > Only if you're planning on using the timertop utility to help you recognise > the biggest sources of timers currently in use to help you improve power > savings. Looks like this fix is needed if you are using cpufreq as modules. Cheers, Con --- kernel/dyn-tick.c | 2 ++ 1 files changed, 2 insertions(+) Index: linux-2.6.15-rc5-dt/kernel/dyn-tick.c =================================================================== --- linux-2.6.15-rc5-dt.orig/kernel/dyn-tick.c +++ linux-2.6.15-rc5-dt/kernel/dyn-tick.c @@ -122,6 +122,8 @@ void dyn_early_reprogram(unsigned int de write_sequnlock_irqrestore(&xtime_lock, flags); } +EXPORT_SYMBOL(dyn_early_reprogram); + void set_dyn_tick_limits(unsigned int max_skip, unsigned int min_skip) { if (max_skip > DYN_TICK_MAX_SKIP)
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- From: Con Kolivas <[email protected]>
- [PATCH] i386 No Idle HZ aka dynticks v051205
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