From: Jason Wang <jasowang@redhat.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: kvm@vger.kernel.org, virtualization@lists.linux-foundation.org,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
peterx@redhat.com, James.Bottomley@hansenpartnership.com,
hch@infradead.org, davem@davemloft.net, jglisse@redhat.com,
linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org,
linux-parisc@vger.kernel.org, christophe.de.dinechin@gmail.com,
jrdr.linux@gmail.com
Subject: Re: [PATCH net-next 0/6] vhost: accelerate metadata access
Date: Mon, 10 Jun 2019 11:50:45 +0800 [thread overview]
Message-ID: <c233324c-cb66-c0ab-45c4-6e6e0499bb22@redhat.com> (raw)
In-Reply-To: <20190605162631-mutt-send-email-mst@kernel.org>
On 2019/6/6 上午4:27, Michael S. Tsirkin wrote:
> On Fri, May 24, 2019 at 04:12:12AM -0400, Jason Wang wrote:
>> Hi:
>>
>> This series tries to access virtqueue metadata through kernel virtual
>> address instead of copy_user() friends since they had too much
>> overheads like checks, spec barriers or even hardware feature
>> toggling like SMAP. This is done through setup kernel address through
>> direct mapping and co-opreate VM management with MMU notifiers.
>>
>> Test shows about 23% improvement on TX PPS. TCP_STREAM doesn't see
>> obvious improvement.
>>
>> Thanks
> Thanks this is queued for next.
>
> Did you want to rebase and repost packed ring support on top?
> IIUC it's on par with split ring with these patches.
>
>
Yes, it's on the way.
Thanks
prev parent reply other threads:[~2019-06-10 3:50 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-24 8:12 [PATCH net-next 0/6] vhost: accelerate metadata access Jason Wang
2019-05-24 8:12 ` [PATCH net-next 1/6] vhost: generalize adding used elem Jason Wang
2019-05-24 8:12 ` [PATCH net-next 2/6] vhost: fine grain userspace memory accessors Jason Wang
2019-05-24 8:12 ` [PATCH net-next 3/6] vhost: rename vq_iotlb_prefetch() to vq_meta_prefetch() Jason Wang
2019-05-24 8:12 ` [PATCH net-next 4/6] vhost: introduce helpers to get the size of metadata area Jason Wang
2019-05-24 8:12 ` [PATCH net-next 5/6] vhost: factor out setting vring addr and num Jason Wang
2019-05-24 8:12 ` [PATCH net-next 6/6] vhost: access vq metadata through kernel virtual address Jason Wang
2019-05-30 18:07 ` [PATCH net-next 0/6] vhost: accelerate metadata access David Miller
2019-05-30 18:13 ` Michael S. Tsirkin
2019-05-30 18:55 ` David Miller
2019-06-05 20:27 ` Michael S. Tsirkin
2019-06-10 3:50 ` Jason Wang [this message]
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