From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A6B38C004C9 for ; Tue, 7 May 2019 19:09:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 87F3520656 for ; Tue, 7 May 2019 19:09:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726993AbfEGTJk (ORCPT ); Tue, 7 May 2019 15:09:40 -0400 Received: from shards.monkeyblade.net ([23.128.96.9]:32942 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726091AbfEGTJk (ORCPT ); Tue, 7 May 2019 15:09:40 -0400 Received: from localhost (unknown [IPv6:2601:601:9f80:35cd::3d8]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id B25F914B5B8A3; Tue, 7 May 2019 12:09:39 -0700 (PDT) Date: Tue, 07 May 2019 12:09:39 -0700 (PDT) Message-Id: <20190507.120939.839641611414589004.davem@davemloft.net> To: edumazet@google.com Cc: netdev@vger.kernel.org, willemb@google.com, eric.dumazet@gmail.com Subject: Re: [PATCH net-next 0/2] net_sched: sch_fq: enable in-kernel pacing for QUIC servers From: David Miller In-Reply-To: <20190504234854.57812-1-edumazet@google.com> References: <20190504234854.57812-1-edumazet@google.com> X-Mailer: Mew version 6.8 on Emacs 26.1 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Tue, 07 May 2019 12:09:39 -0700 (PDT) Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Eric Dumazet Date: Sat, 4 May 2019 16:48:52 -0700 > Willem added GSO support to UDP stack, greatly improving performance > of QUIC servers. > > We also want to enable in-kernel pacing, which is possible thanks to EDT > model, since each sendmsg() can provide a timestamp for the skbs. > > We have to change sch_fq to enable feeding packets in arbitrary EDT order, > and make sure that packet classification do not trust unconnected sockets. > > Note that this patch series also is a prereq for a future TCP change > enabling per-flow delays/reorders/losses to implement high performance > TCP emulators. Looks great, series applied.