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Re: [Qemu-devel] [PATCH][RFT] Make DMA timer driven
From: |
Paul Brook |
Subject: |
Re: [Qemu-devel] [PATCH][RFT] Make DMA timer driven |
Date: |
Fri, 24 Oct 2008 00:13:49 +0100 |
User-agent: |
KMail/1.9.9 |
> You can find info regarding CRIS/ETRAX testing here:
> http://lists.gnu.org/archive/html/qemu-devel/2008-09/msg00279.html
>
> I tested the patch. It works but unfortunately DMA transfers to/from
> the ethernet block now seem to emulate very slowly.
Is there a reason you're deferring the DMA transfers, rather than completing
them immediately? In most cases you want to do the DMA as soon as both ends
are ready, and there's no benefit artificially delaying things. Any delay is
entirely arbitrary, and won't work reliably.
Paul