Re: [Xen-devel] Test results on Unisys ES7000 64x 256gb using unstablec/s 16693 on 3.2.0 Release Candidate

[Bill Burns <bburns@xxxxxxxxxx>]

Bill Burns wrote:
> Ian Pratt wrote:
>>>>> No, I have not tried on 3.2.0. Will see if I can at some
>>>>> point...
>>>> Also, do you have any more info to share on what actually goes wrong
>>> when
>>>> dom0 has 'too much' memory?
>>>>
>>> The dom0 kernel spits out messages like the following starting around
>>> the
>>> init of cpu1 time, and periodically thereafter.
>>>
>>> Timer ISR/0: Time went backwards: delta=-50206266948
>> delta_cpu=13733052
>>> shadow=8186343367 off=13649733458 processed=72042343367
>>> cpu_processed=21822343367
>>>
>>> Eventually just hanging (or making such slow progress to be
>>> effectively hung).
>> How many CPUs does the system have? Does the same large memory issue
>> occur if you have fewer physical CPUs?
>>
> 
> The system has 64 but is only built for 32, so the others are
> ignored. Don't know if the problem happens with less CPUs at
> this point. Hope to get more data soon...
> 

Interestingly, the symptom seems to disappear with a
Hypervisor built to support all 64 CPUs. But I need to
get more time on the system to say that for sure.

 Bill



> Thanks,
>  Bill
> 
>> Thanks,
>> Ian
>>
>>
> 
> 
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