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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 15:47:21 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 |
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
- [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