Re: [RFC][PATCH] HZ as a config option

From: Dave Hansen (haveblue@us.ibm.com)
Date: Mon Oct 07 2002 - 11:58:57 EST


Alan Cox wrote:
> On Fri, 2002-10-04 at 23:53, Dave Hansen wrote:
>
>>On large systems (like NUMA-Q, Intel Profusion, etc...), latency and
>>user responsiveness become much less important. The extra scheduling
>>overhead caused by higher HZ is bad.
>>
>>This is x86-only right now. Is there any wider desire to tune this at
>>config time? Do any architecutures have strict rules as to what this
>>can be set to?
>
> You can't set this arbitarily, the NTP PLL's will only lock for certain
> value ranges.

Where can I find these ranges? include/linux/timex.h only errors if
the number is out of the 12-1535 range.

-- 
Dave Hansen
haveblue@us.ibm.com

- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Mon Oct 07 2002 - 22:00:59 EST