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Re: Extreme system overhead on large IP27

To: ralf@linux-mips.org
Subject: Re: Extreme system overhead on large IP27
From: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Date: Wed, 25 Oct 2006 02:34:28 +0900 (JST)
Cc: creideiki+linux-mips@ferretporn.se, linux-mips@linux-mips.org
In-reply-to: <20061024155045.GA28355@linux-mips.org> <6285.136.163.203.3.1161704681.squirrel@www.ferretporn.se>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <20061024140614.GB27800@linux-mips.org> <6285.136.163.203.3.1161704681.squirrel@www.ferretporn.se> <20061024155045.GA28355@linux-mips.org>
Sender: linux-mips-bounce@linux-mips.org
On Tue, 24 Oct 2006 16:50:45 +0100, Ralf Baechle <ralf@linux-mips.org> wrote:
> > 2. Timekeeping is broken. The clock in /proc/driver/rtc seems correct, but
> > the system clock advances at about 1/16 of real time.
> 
> This one was caused by changeset ebca9aafa9bd5086d9f310205a8e30e225c5a5a6
> which apparently wasn't quite ripe.  You can work around it by
> revoking this changeset for now.  The time damage affects other systems
> as well ...

Now I'm looking my patch again but still can not find any problem...

One question:

>    # zcat /proc/config.gz | grep HZ | grep -v ^#
>    CONFIG_HZ_250=y
>    CONFIG_SYS_SUPPORTS_ARBIT_HZ=y
>    CONFIG_HZ=250

IP27 really supports HZ=250 ?

---
Atsushi Nemoto

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