From: Dave Hansen <haveblue@us.ibm.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [RFC][PATCH] HZ as a config option
Date: Mon, 07 Oct 2002 09:58:57 -0700 [thread overview]
Message-ID: <3DA1BD51.6040003@us.ibm.com> (raw)
In-Reply-To: 1033779196.1335.8.camel@irongate.swansea.linux.org.uk
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
next prev parent reply other threads:[~2002-10-07 16:53 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-04 22:53 [RFC][PATCH] HZ as a config option Dave Hansen
2002-10-05 0:53 ` Alan Cox
2002-10-07 16:58 ` Dave Hansen [this message]
2002-10-07 17:19 ` Alan Cox
2002-10-07 17:27 ` george anzinger
2002-10-07 19:27 ` Vojtech Pavlik
2002-10-07 20:25 ` george anzinger
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