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Re: [Qemu-block] [Qemu-devel] Request for clarification on qemu-img conv
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From: |
De Backer, Fred (Nokia - BE/Antwerp) |
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Subject: |
Re: [Qemu-block] [Qemu-devel] Request for clarification on qemu-img convert behavior zeroing target host_device |
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Date: |
Fri, 14 Dec 2018 08:15:57 +0000 |
>>> Indeed, performance traces are important for issues like this.
>>See strace of both FC27 and FC29 attached
>Looks like you traced only the main thread. All the I/O is done in other
>threads.
>These flags would be useful:
>
> strace -o log -f -T -tt
New straces attached with mentioned flags.
Fred
fc27_qemu-img.strace.gz
Description: fc27_qemu-img.strace.gz
fc29_qemu-img.strace.gz
Description: fc29_qemu-img.strace.gz
- Re: [Qemu-block] [Qemu-devel] Request for clarification on qemu-img convert behavior zeroing target host_device, Eric Blake, 2018/12/13
- Re: [Qemu-block] [Qemu-devel] Request for clarification on qemu-img convert behavior zeroing target host_device, Kevin Wolf, 2018/12/13
- Re: [Qemu-block] [Qemu-devel] Request for clarification on qemu-img convert behavior zeroing target host_device, Eric Blake, 2018/12/13
- Re: [Qemu-block] [Qemu-devel] Request for clarification on qemu-img convert behavior zeroing target host_device, De Backer, Fred (Nokia - BE/Antwerp), 2018/12/13
- Re: [Qemu-block] [Qemu-devel] Request for clarification on qemu-img convert behavior zeroing target host_device, Nir Soffer, 2018/12/13
- Re: [Qemu-block] [Qemu-devel] Request for clarification on qemu-img convert behavior zeroing target host_device,
De Backer, Fred (Nokia - BE/Antwerp) <=
- Re: [Qemu-block] [Qemu-devel] Request for clarification on qemu-img convert behavior zeroing target host_device, De Backer, Fred (Nokia - BE/Antwerp), 2018/12/14
- Re: [Qemu-block] [Qemu-devel] Request for clarification on qemu-img convert behavior zeroing target host_device, Kevin Wolf, 2018/12/14
- Re: [Qemu-block] [Qemu-devel] Request for clarification on qemu-img convert behavior zeroing target host_device, De Backer, Fred (Nokia - BE/Antwerp), 2018/12/14
- Re: [Qemu-block] [Qemu-devel] Request for clarification on qemu-img convert behavior zeroing target host_device, Richard W.M. Jones, 2018/12/14
- Re: [Qemu-block] [Qemu-devel] Request for clarification on qemu-img convert behavior zeroing target host_device, Daniel P . Berrangé, 2018/12/14