From mboxrd@z Thu Jan  1 00:00:00 1970
From: Valtteri Kiviniemi <valtteri.kiviniemi@dataproof.fi>
Subject: Re: Latest unstable detects cpu speed incorrectly
Date: Tue, 27 Oct 2009 18:12:08 +0200
Message-ID: <4AE71BD8.9080906@dataproof.fi>
References: <C70CCAE6.188FD%keir.fraser@eu.citrix.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xensource.com>
In-Reply-To: <C70CCAE6.188FD%keir.fraser@eu.citrix.com>
List-Unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xensource.com>
List-Help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-Subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
Sender: xen-devel-bounces@lists.xensource.com
Errors-To: xen-devel-bounces@lists.xensource.com
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
List-Id: xen-devel@lists.xenproject.org

Hi,

I have to wait for that to occur again. There were no error messages, 
suddenly domU's with emulated TSC started to use a lot of CPU until they 
were so slow that they had to be destroyed. domU's with native tsc are 
working fine.

Is there any way to track down the problem?

- Valtteri Kiviniemi

Keir Fraser kirjoitti:
> Haven't heard any other reports of that. Can you provide more details?
> 
>  -- Keir
> 
> On 27/10/2009 15:51, "Valtteri Kiviniemi" <valtteri.kiviniemi@dataproof.fi>
> wrote:
> 
>> Hi,
>>
>> Seems like that emulation is not quite working as it should be. domU's
>> are using all the available cpu and then they crash. I did a fallback
>> back to the old behaviour and the virtuals running with tsc_native=1 are
>> working fine.
>>
>> - Valtteri Kiviniemi
>>
>> Valtteri Kiviniemi kirjoitti:
>>> Hi,
>>>
>>> Ok, good to know. Is it always at 1GHz or can it be adjusted? Is there
>>> some other new features different from 3.4.1 that I should know?
>>>
>>>
>>> - Valtteri Kiviniemi
>>>
>>> Keir Fraser kirjoitti:
>>>> On 27/10/2009 15:22, "Valtteri Kiviniemi"
>>>> <valtteri.kiviniemi@dataproof.fi>
>>>> wrote:
>>>>
>>>>> We are testing the latest xen-unstable and found an interesting bug.
>>>>> dom0 detects cpu speed correctly but when booting domU it detects it
>>>>> incorrectly:
>>>>>
>>>>> "Detected 1000.000 MHz processor."
>>>> TSC is emulated at that speed. If you want old behaviour then add
>>>> tsc_native=1
>>>> to your domain config file.
>>>>
>>>>  -- Keir
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> Xen-devel mailing list
>>>> Xen-devel@lists.xensource.com
>>>> http://lists.xensource.com/xen-devel
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@lists.xensource.com
>> http://lists.xensource.com/xen-devel
> 
>