From: David Miller <davem@davemloft.net>
To: mst@redhat.com
Cc: quintela@redhat.com, rusty@rustcorp.com.au,
paulmck@linux.vnet.ibm.com, arnd@arndb.de, kvm@vger.kernel.org,
virtualization@lists.osdl.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, alex.williamson@redhat.com,
amit.shah@redhat.com
Subject: Re: [PATCH] vhost-net: utilize PUBLISH_USED_IDX feature
Date: Mon, 17 May 2010 21:08:32 -0700 (PDT) [thread overview]
Message-ID: <20100517.210832.27816606.davem@davemloft.net> (raw)
In-Reply-To: <20100518011931.GA21918@redhat.com>
From: "Michael S. Tsirkin" <mst@redhat.com>
Date: Tue, 18 May 2010 04:19:31 +0300
> With PUBLISH_USED_IDX, guest tells us which used entries
> it has consumed. This can be used to reduce the number
> of interrupts: after we write a used entry, if the guest has not yet
> consumed the previous entry, or if the guest has already consumed the
> new entry, we do not need to interrupt.
> This imporves bandwidth by 30% under some workflows.
>
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> ---
>
> Rusty, Dave, this patch depends on the patch
> "virtio: put last seen used index into ring itself"
> which is currently destined at Rusty's tree.
> Rusty, if you are taking that one for 2.6.35, please
> take this one as well.
> Dave, any objections?
None:
Acked-by: David S. Miller <davem@davemloft.net>
next parent reply other threads:[~2010-05-18 4:08 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20100518011931.GA21918@redhat.com>
2010-05-18 4:08 ` David Miller [this message]
2010-05-19 17:04 ` [PATCH] vhost-net: utilize PUBLISH_USED_IDX feature Avi Kivity
2010-05-19 22:27 ` Michael S. Tsirkin
2010-05-20 4:18 ` Rusty Russell
2010-05-20 6:06 ` Avi Kivity
2010-05-18 1:19 Michael S. Tsirkin
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