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Re: [Qemu-devel] [PATCH] CPU consumption optimization of 'qemu-img conve
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] [PATCH] CPU consumption optimization of 'qemu-img convert' using bdrv_is_allocated() |
Date: |
Wed, 15 Jun 2011 09:39:52 +0100 |
On Wed, Jun 15, 2011 at 8:38 AM, Dmitry Konishchev <address@hidden> wrote:
> On Tue, Jun 14, 2011 at 7:58 PM, Stefan Hajnoczi <address@hidden> wrote:
>> Yes, please.
>
> OK, I'll do it as soon I'll find time for it.
>
>
> On Tue, Jun 14, 2011 at 7:58 PM, Stefan Hajnoczi <address@hidden> wrote:
>> For image files the block layer should be caching the device capacity (size)
>> anyway, so you probably don't need to allocate the array, just call
>> bdrv_get_geometry(). That might make it easier to write a self-contained
>> function.
>
> I've tried to not cache, but it turned out that bdrv_get_geometry()
> calls are quite noticeable in profiler without caching.
Why is bdrv_get_geometry() slow?
Stefan
- [Qemu-devel] [PATCH] CPU consumption optimization of 'qemu-img convert' using bdrv_is_allocated(), Dmitry Konishchev, 2011/06/08
- Re: [Qemu-devel] [PATCH] CPU consumption optimization of 'qemu-img convert' using bdrv_is_allocated(), Stefan Hajnoczi, 2011/06/13
- Re: [Qemu-devel] [PATCH] CPU consumption optimization of 'qemu-img convert' using bdrv_is_allocated(), Dmitry Konishchev, 2011/06/13
- Re: [Qemu-devel] [PATCH] CPU consumption optimization of 'qemu-img convert' using bdrv_is_allocated(), Dmitry Konishchev, 2011/06/14
- Re: [Qemu-devel] [PATCH] CPU consumption optimization of 'qemu-img convert' using bdrv_is_allocated(), Stefan Hajnoczi, 2011/06/14
- Re: [Qemu-devel] [PATCH] CPU consumption optimization of 'qemu-img convert' using bdrv_is_allocated(), Dmitry Konishchev, 2011/06/15
- Re: [Qemu-devel] [PATCH] CPU consumption optimization of 'qemu-img convert' using bdrv_is_allocated(),
Stefan Hajnoczi <=
- Re: [Qemu-devel] [PATCH] CPU consumption optimization of 'qemu-img convert' using bdrv_is_allocated(), Dmitry Konishchev, 2011/06/15
- Re: [Qemu-devel] [PATCH] CPU consumption optimization of 'qemu-img convert' using bdrv_is_allocated(), Stefan Hajnoczi, 2011/06/15
- Re: [Qemu-devel] [PATCH] CPU consumption optimization of 'qemu-img convert' using bdrv_is_allocated(), Dmitry Konishchev, 2011/06/15
- Re: [Qemu-devel] [PATCH] CPU consumption optimization of 'qemu-img convert' using bdrv_is_allocated(), Stefan Hajnoczi, 2011/06/15
- Re: [Qemu-devel] [PATCH] CPU consumption optimization of 'qemu-img convert' using bdrv_is_allocated(), Dmitry Konishchev, 2011/06/15
- Re: [Qemu-devel] [PATCH] CPU consumption optimization of 'qemu-img convert' using bdrv_is_allocated(), Stefan Hajnoczi, 2011/06/15
- Re: [Qemu-devel] [PATCH] CPU consumption optimization of 'qemu-img convert' using bdrv_is_allocated(), Dmitry Konishchev, 2011/06/16
- Re: [Qemu-devel] [PATCH] CPU consumption optimization of 'qemu-img convert' using bdrv_is_allocated(), Stefan Hajnoczi, 2011/06/17
[Qemu-devel] [PATCH] CPU consumption optimization of 'qemu-img convert' using bdrv_is_allocated(), Dmitry Konishchev, 2011/06/15