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[Qemu-devel] Re: [PATCH] virtio: Use ioeventfd for virtqueue notify

From: Anthony Liguori
Subject: [Qemu-devel] Re: [PATCH] virtio: Use ioeventfd for virtqueue notify
Date: Sun, 03 Oct 2010 20:18:49 -0500
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20100915 Lightning/1.0b1 Thunderbird/3.0.8

On 10/03/2010 09:28 AM, Michael S. Tsirkin wrote:

This is using eventfd as well.
Sorry, I meant irqfd.

I've tried using irqfd in userspace. It hurts performance quite a bit compared to doing an ioctl so I would suspect this too.

A last_used_idx or similar mechanism should help performance quite a bit on top of ioeventfd too.


Anthony Liguori

error compiling committee.c: too many arguments to function

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