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Re: [Qemu-devel] Queries on dataplane mechanism
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] Queries on dataplane mechanism |
Date: |
Fri, 15 Jul 2016 15:17:54 +0100 |
User-agent: |
Mutt/1.6.1 (2016-04-27) |
On Tue, Jun 28, 2016 at 02:36:41PM +0530, Gaurav Sharma wrote:
> I am working on something to move PCI devices to data plane architecture.
> Do you know any know reasons, as to why this was not tried before ?
The dataplane approach is implemented on a per-device basis because it
involves registering an ioeventfd to trigger on a hardware register
access.
It's only worth doing for performance-critical devices (and performance
critical hardware registers in those devices).
Stefan
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