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Re: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2
From: |
Stefan Priebe - Profihost AG |
Subject: |
Re: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2 |
Date: |
Mon, 16 Feb 2015 16:38:40 +0100 |
Hi,
> Am 16.02.2015 um 15:58 schrieb Andrey Korolyov <address@hidden>:
>
> On Mon, Feb 16, 2015 at 5:47 PM, Stefan Priebe - Profihost AG
> <address@hidden> wrote:
>> 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?
>
> Hi Stefan, splitdebug will help you there. Also this is a standard way
> to ship debugging symbols in most distribuitions, so I wonder if you
> may use just a generic build skeleton for this task...
I'm using enable-debug with dh_strip from Debian
Stefan
- [Qemu-devel] slow speed for virtio-scsi since qemu 2.2, Stefan Priebe, 2015/02/15
- Re: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2, Alexandre DERUMIER, 2015/02/16
- Re: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2, Paolo Bonzini, 2015/02/16
- Re: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2, Stefan Priebe - Profihost AG, 2015/02/16
- Re: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2, Paolo Bonzini, 2015/02/16
- Re: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2, Stefan Priebe - Profihost AG, 2015/02/16
- Re: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2, Paolo Bonzini, 2015/02/16
- Re: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2, Stefan Priebe, 2015/02/16
- Re: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2, Andreas Färber, 2015/02/16
- Re: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2, Stefan Priebe, 2015/02/16