From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Wang Subject: Re: [PATCH net-next V2] tun: introduce tx skb ring Date: Thu, 16 Jun 2016 15:08:42 +0800 Message-ID: <5762507A.4030801@redhat.com> References: <1465979897-4445-1-git-send-email-jasowang@redhat.com> <5761418F.2050407@mojatatu.com> <5761422F.3010303@mojatatu.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-2022-jp" Content-Transfer-Encoding: 7bit Cc: eric.dumazet@gmail.com, brouer@redhat.com To: Jamal Hadi Salim , mst@redhat.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, davem@davemloft.net Return-path: In-Reply-To: <5761422F.3010303@mojatatu.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org List-Id: netdev.vger.kernel.org On 2016年06月15日 19:55, Jamal Hadi Salim wrote: > On 16-06-15 07:52 AM, Jamal Hadi Salim wrote: >> On 16-06-15 04:38 AM, Jason Wang wrote: >>> We used to queue tx packets in sk_receive_queue, this is less >>> efficient since it requires spinlocks to synchronize between producer >> So this is more exercising the skb array improvements. For tun >> it would be useful to see general performance numbers on user/kernel >> crossing (i.e tun read/write). >> If you have the cycles can you run such tests? >> > Ignore my message - you are running pktgen from a VM towards the host. Actually reversed, test were done from an external host to VM. Thanks > So the numbers you posted are what i was interested in. > Thanks for the good work. > > cheers, > jamal >