From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.mhcomputing.net (master.mhcomputing.net [74.208.46.186]) by dpdk.org (Postfix) with ESMTP id BBEE99E5 for ; Fri, 11 Sep 2015 19:59:56 +0200 (CEST) Received: by mail.mhcomputing.net (Postfix, from userid 1000) id ABB1F80C502; Fri, 11 Sep 2015 10:58:58 -0700 (PDT) Date: Fri, 11 Sep 2015 10:58:58 -0700 From: Matthew Hall To: "Ananyev, Konstantin" Message-ID: <20150911175858.GA2491@mhcomputing.net> References: <1439489195-31553-1-git-send-email-vladz@cloudius-systems.com> <55F2F6A9.6080405@cloudius-systems.com> <3734976.j9Azrvq6io@xps13> <20150911171754.GA1572@mhcomputing.net> <2601191342CEEE43887BDE71AB97725836A85B76@irsmsx105.ger.corp.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <2601191342CEEE43887BDE71AB97725836A85B76@irsmsx105.ger.corp.intel.com> User-Agent: Mutt/1.5.23 (2014-03-12) Cc: "dev@dpdk.org" Subject: Re: [dpdk-dev] [PATCH v1] ixgbe_pmd: forbid tx_rs_thresh above 1 for all NICs but 82598 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 11 Sep 2015 17:59:57 -0000 On Fri, Sep 11, 2015 at 05:42:48PM +0000, Ananyev, Konstantin wrote: > As I remember, with freebsd stack when TSO is on it was not unusual to see chains of ~30 segments. > That's over port with 'normal' mtu (1.5K). > Konstantin This makes things quite tricky, because the TSO logic itself would need to handle the segment generation versus the limit, as the app would not really be able to force TSO to change its behavior, right? Matthew.