Re: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2

[Stefan Priebe - Profihost AG]

Hi,
Am 16.02.2015 um 15:44 schrieb Paolo Bonzini:
> 
> 
> On 16/02/2015 15:43, Stefan Priebe - Profihost AG wrote:
>> Hi,
>>
>> Am 16.02.2015 um 13:24 schrieb Paolo Bonzini:
>>>
>>>
>>> On 15/02/2015 19:46, Stefan Priebe wrote:
>>>>
>>>> while i get a constant random 4k i/o write speed of 20.000 iops with
>>>> qemu 2.1.0 or 2.1.3. I get jumping speeds with qemu 2.2 (jumping between
>>>> 500 iops and 15.000 iop/s).
>>>>
>>>> If i use virtio instead of virtio-scsi speed is the same between 2.2 and
>>>> 2.1.
>>>
>>> http://wiki.qemu.org/Contribute/ReportABug
>>>
>>> What is your command line?
>>
>> Could it be that this is a results of compiling qemu with --enable-debug
>> to get debugging symbols?
> 
> Yes.

*urg* my fault - sorry. Is there a way to get debugging symbols without
using enable-debug / getting slower performance?

Greets,
Stefan