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Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2
From: |
Alexander Graf |
Subject: |
Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35? |
Date: |
Wed, 4 Aug 2010 19:01:35 +0200 |
On 04.08.2010, at 18:54, Avi Kivity wrote:
> On 08/04/2010 07:45 PM, Alexander Graf wrote:
>>
>> I see two alternatives out of this mess:
>>
>> 1) Speed up string PIO so we're actually fast again.
>
> Certainly, the best option given that it needs no new interfaces, and
> improves the most workloads.
>
>> 2) Using a different interface (that could also be DMA fw_cfg - remember,
>> we're on a private interface anyways)
>
> A guest/host interface is not private.
fw_cfg is as private as it gets with host/guest interfaces. It's about as close
as CPU specific MSRs or SMC chips.
>
>> Admittedly 1 would also help in more cases than just booting with -kernel
>> and -initrd, but if that won't get us to acceptable levels (and yes, 8
>> seconds for 100MB is unacceptable) I don't see any way around 2.
>
> 3) don't use -kernel for 100MB or more. It's not the right tool.
Why not? You're the one always ranting about caring about users. Now you get at
least 3 users from the Qemu development community actually using a feature and
you just claim it's wrong? Please, we've added way more useless features for
worse reasons.
Alex
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, (continued)
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Gleb Natapov, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Gerd Hoffmann, 2010/08/05
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Gleb Natapov, 2010/08/05
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Avi Kivity, 2010/08/05
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Gleb Natapov, 2010/08/05
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Avi Kivity, 2010/08/05
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Gleb Natapov, 2010/08/05
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Anthony Liguori, 2010/08/05
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Alexander Graf, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Avi Kivity, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?,
Alexander Graf <=
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Avi Kivity, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Alexander Graf, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Avi Kivity, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, David S. Ahern, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Richard W.M. Jones, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Avi Kivity, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Anthony Liguori, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Alexander Graf, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Avi Kivity, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Anthony Liguori, 2010/08/04