From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michal Schmidt Subject: Re: significant napi_gro_frags() slowdown Date: Thu, 27 Mar 2014 18:05:48 +0100 Message-ID: <53345A6C.5080008@redhat.com> References: <5334542F.1050702@redhat.com> <1395938874.12610.306.camel@edumazet-glaptop2.roam.corp.google.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, Jerry Chu , Eric Dumazet , "David S. Miller" To: Eric Dumazet Return-path: Received: from mx1.redhat.com ([209.132.183.28]:3956 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752124AbaC0RF4 (ORCPT ); Thu, 27 Mar 2014 13:05:56 -0400 In-Reply-To: <1395938874.12610.306.camel@edumazet-glaptop2.roam.corp.google.com> Sender: netdev-owner@vger.kernel.org List-ID: Dne 27.3.2014 17:47, Eric Dumazet napsal: > On Thu, 2014-03-27 at 17:39 +0100, Michal Schmidt wrote: >> I received a report about a performance regression on a simple workload >> of receiving a single TCP stream using a be2net NIC. Previously the >> reporter was able to reach more than 9 Gb/s, but now he sees less than 7 >> Gb/s. > > Yeah, we are aware of this, and we had some discussions, but not yet got > a fix. > > Are you running a 64 or 32bit kernel BTW ? Both my reporter and I are running 64bit kernels. Thanks, Michal