From: Dmitry Konishchev <konishchev@gmail.com>
To: Stefan Hajnoczi <stefanha@gmail.com>
Cc: Kevin Wolf <kwolf@redhat.com>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH] CPU consumption optimization of 'qemu-img convert' using bdrv_is_allocated()
Date: Wed, 15 Jun 2011 11:38:27 +0400 [thread overview]
Message-ID: <BANLkTin-wmBn1DiriRpcK-g64fYDiv-uxA@mail.gmail.com> (raw)
In-Reply-To: <BANLkTimJWWLb15tNbSuEbnONV3E34QSt_A@mail.gmail.com>
On Tue, Jun 14, 2011 at 7:58 PM, Stefan Hajnoczi <stefanha@gmail.com> 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 <stefanha@gmail.com> 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.
--
Дмитрий Конищев (Dmitry Konishchev)
mailto:konishchev@gmail.com
next prev parent reply other threads:[~2011-06-15 7:38 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-08 14:50 [Qemu-devel] [PATCH] CPU consumption optimization of 'qemu-img convert' using bdrv_is_allocated() Dmitry Konishchev
2011-06-13 8:26 ` Stefan Hajnoczi
2011-06-13 9:13 ` Dmitry Konishchev
2011-06-14 7:43 ` Dmitry Konishchev
2011-06-14 15:58 ` Stefan Hajnoczi
2011-06-15 7:38 ` Dmitry Konishchev [this message]
2011-06-15 8:39 ` Stefan Hajnoczi
2011-06-15 9:50 ` Dmitry Konishchev
2011-06-15 12:02 ` Stefan Hajnoczi
2011-06-15 13:14 ` Dmitry Konishchev
2011-06-15 13:33 ` Stefan Hajnoczi
2011-06-15 13:37 ` Dmitry Konishchev
2011-06-15 13:57 ` Stefan Hajnoczi
2011-06-16 8:10 ` Dmitry Konishchev
2011-06-17 7:25 ` Stefan Hajnoczi
2011-06-15 10:14 ` Dmitry Konishchev
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