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Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD
From: |
Aurelien Jarno |
Subject: |
Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD |
Date: |
Sun, 17 Mar 2013 20:20:44 +0100 |
User-agent: |
Mutt/1.5.20 (2009-06-14) |
On Sun, Mar 17, 2013 at 07:51:00PM +0100, Paolo Bonzini wrote:
> Il 17/03/2013 01:04, Aurelien Jarno ha scritto:
> > | boot | install build-dep | build lm-sensors |
> > ------------------------+------+-------------------+------------------+
> > versatile | 1:09 | 2:27 | 4:09 |
> > versatile cache=wb | 1:08 | 2:25 | 3:44 |
>
> Strange, cache=wb should be the default.
I agree it's strange, maybe there were other effects, but I am sure when
I did the tests cache=wb the build time was clearly shorter.
> The real problem with SD is that it doesn't have a flush command, hence
> it cannot be made safe against power losses. But the solution is to add
> support for virtio-mmio in those boards.
>
> Paolo
>
> > vexpress | 1:11 | 3:07 | 3:49 |
> > vexpress cache=wb | 1:07 | 3:07 | 3:47 |
> >
Here the results are more consistent with the default being cache=wb.
I'll try to do the same tests on another machine to see if the results
are still the same.
--
Aurelien Jarno GPG: 1024D/F1BCDB73
address@hidden http://www.aurel32.net
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, (continued)
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, Aurelien Jarno, 2013/03/15
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, Peter Maydell, 2013/03/15
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, Aurelien Jarno, 2013/03/16
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, Peter Maydell, 2013/03/16
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, Aurelien Jarno, 2013/03/17
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, Peter Maydell, 2013/03/17
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, Paolo Bonzini, 2013/03/17
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, Peter Maydell, 2013/03/17
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, Aurelien Jarno, 2013/03/17
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, Paolo Bonzini, 2013/03/18
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD,
Aurelien Jarno <=
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, Paolo Bonzini, 2013/03/17