From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qg0-f47.google.com (mail-qg0-f47.google.com [209.85.192.47]) by dpdk.org (Postfix) with ESMTP id ADE975681 for ; Fri, 11 Sep 2015 17:17:17 +0200 (CEST) Received: by qgx61 with SMTP id 61so65007946qgx.3 for ; Fri, 11 Sep 2015 08:17:17 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=WcoFLF2BCMWqqNDrd7CEG+LCscxFdcGFrcbDtS9FTGY=; b=fo94lAxUAGFGCtXskKKDjJtzoqaJKJaxo1csePjfs3oZnSClgWBDwnGEJORKMSvHxo Byt2JMcQhZ4RdU26ayqJEUoszaBP+od+3P8rBITz2b3zrn2v5swZVIH8C282kOLUYTnj pkZmIuxWeglT8w4ztGSqmnQDQIk653EL0Dg1JyFiYL8Z7jnSMcwxCWjDAPXcjsxYVljA NZVv0CwWqOBVfmdcBHZbqZIhvZMYUrlLbZRVOzJeNvZhnUdQUlKVnfKfoGVqPWGAkFth oH2DDb8AMFhTr85LnJu8+hmW/PE8qIIK3NSgeh8dZkzlEd8XopgASHWRbd555Jx6QbUQ UZeg== X-Gm-Message-State: ALoCoQlup0TEStIfrwV6yPBQp46v78qF6P7IrThDJ4sp1IiU9rKb6Tb/KBpV/1cnoWwxE/i7D78K MIME-Version: 1.0 X-Received: by 10.140.144.23 with SMTP id 23mr4056796qhq.38.1441984637043; Fri, 11 Sep 2015 08:17:17 -0700 (PDT) Received: by 10.55.123.131 with HTTP; Fri, 11 Sep 2015 08:17:16 -0700 (PDT) Received: by 10.55.123.131 with HTTP; Fri, 11 Sep 2015 08:17:16 -0700 (PDT) In-Reply-To: <2601191342CEEE43887BDE71AB97725836A84B75@irsmsx105.ger.corp.intel.com> References: <1439489195-31553-1-git-send-email-vladz@cloudius-systems.com> <9837353.xdQKzFi908@xps13> <2601191342CEEE43887BDE71AB97725836A84B75@irsmsx105.ger.corp.intel.com> Date: Fri, 11 Sep 2015 18:17:16 +0300 Message-ID: From: Vladislav Zolotarov To: Konstantin Ananyev Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.15 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 15:17:18 -0000 On Sep 9, 2015 4:19 PM, "Ananyev, Konstantin" wrote: > > Hi Thomas, > > > -----Original Message----- > > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Thomas Monjalon > > Sent: Wednesday, September 09, 2015 1:19 PM > > To: Zhang, Helin > > Cc: dev@dpdk.org > > Subject: Re: [dpdk-dev] [PATCH v1] ixgbe_pmd: forbid tx_rs_thresh above 1 for all NICs but 82598 > > > > 2015-08-25 20:13, Zhang, Helin: > > > Yes, I got the perfect answers. Thank you very much! > > > I just wanted to make sure the test case was OK with the limit of maximum number of descriptors, as I heard there is a hang issue on > > other NICs of using more descriptors than hardware allowed. > > > OK. I am still waiting for the answers/confirmation from x540 hardware designers. We need all agree on your patches to avoid risks. > > > > Helin, any news? > > Can we apply v4 of this patch? > > Unfortunately we are seeing a huge performance drop with that patch: > On my box bi-directional traffic (64B packet) over one port can't reach even 11 Mpps. Konstantin, could u clarify - u saw "only" 11 Mpps with v3 of this patch which doesn't change the rs_thresh and only sets RS on every packet? What is the performance in the same test without this patch? > We are still doing some experiments and consultations with ND guys how we can overcome > this problem and keep performance intact. > > Konstantin