From: Avi Kivity <avi@redhat.com>
To: Stefan Hajnoczi <stefanha@gmail.com>
Cc: Christoph Hellwig <hch@infradead.org>,
"Michael S. Tsirkin" <mst@redhat.com>,
Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>,
kvm@vger.kernel.org, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Re: [PATCH 2/3] virtio-pci: Use ioeventfd for virtqueue notify
Date: Sun, 14 Nov 2010 14:19:10 +0200 [thread overview]
Message-ID: <4CDFD3BE.8090702@redhat.com> (raw)
In-Reply-To: <4CDFC288.9050800@redhat.com>
On 11/14/2010 01:05 PM, Avi Kivity wrote:
>> I agree, but let's enable virtio-ioeventfd carefully because bad code
>> is out there.
>
>
> Sure. Note as long as the thread waiting on ioeventfd doesn't consume
> too much cpu, it will awaken quickly and we won't have the
> "transaction per timeslice" effect.
>
> btw, what about virtio-blk with linux-aio? Have you benchmarked that
> with and without ioeventfd?
>
And, what about efficiency? As in bits/cycle?
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2010-11-14 12:19 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-11 13:47 [Qemu-devel] [PATCH v2 0/3] virtio: Use ioeventfd for virtqueue notify Stefan Hajnoczi
2010-11-11 13:47 ` [Qemu-devel] [PATCH 1/3] virtio-pci: Rename bugs field to flags Stefan Hajnoczi
2010-11-11 13:47 ` [Qemu-devel] [PATCH 2/3] virtio-pci: Use ioeventfd for virtqueue notify Stefan Hajnoczi
2010-11-11 15:53 ` [Qemu-devel] " Michael S. Tsirkin
2010-11-12 9:18 ` Stefan Hajnoczi
2010-11-12 9:25 ` Michael S. Tsirkin
2010-11-12 13:10 ` Stefan Hajnoczi
2010-11-11 16:45 ` Christoph Hellwig
2010-11-12 9:20 ` Stefan Hajnoczi
2010-11-14 10:34 ` Avi Kivity
2010-11-14 10:37 ` Stefan Hajnoczi
2010-11-14 11:05 ` Avi Kivity
2010-11-14 12:19 ` Avi Kivity [this message]
2010-11-15 11:20 ` Stefan Hajnoczi
2010-12-01 11:44 ` Stefan Hajnoczi
2010-12-01 12:30 ` Avi Kivity
2010-12-01 21:34 ` Stefan Hajnoczi
2010-12-06 15:09 ` Avi Kivity
2010-11-11 16:59 ` Avi Kivity
2010-11-11 17:12 ` Michael S. Tsirkin
2010-11-11 17:55 ` Gleb Natapov
2010-11-11 13:47 ` [Qemu-devel] [PATCH 3/3] virtio-pci: Don't use ioeventfd on old kernels Stefan Hajnoczi
2010-11-11 17:46 ` [Qemu-devel] Re: [PATCH v2 0/3] virtio: Use ioeventfd for virtqueue notify Michael S. Tsirkin
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