From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr0-f180.google.com (mail-wr0-f180.google.com [209.85.128.180]) by dpdk.org (Postfix) with ESMTP id 139659155 for ; Thu, 25 May 2017 07:22:27 +0200 (CEST) Received: by mail-wr0-f180.google.com with SMTP id l50so65740980wrc.3 for ; Wed, 24 May 2017 22:22:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=weka.io; s=google; h=from:to:cc:subject:date:message-id:organization:in-reply-to :references:mime-version:content-transfer-encoding; bh=DrWzZ4XkFZR5+vEIyVcds0H7Luoe8Er84JlUwbw4vGo=; b=yIrNz9jpdJzRUBbr3DcjnOhOeH0xL9BcSpvsNttLBKyaEf1gFtCZrQKBcOkOYCP8B8 G22Eq/BrUdnFXwpAps2UR5lux5SvSspPBV/WqPYy8qGn5qMk6g+KxBFrkO66HHsrSS7f 5Y4s88qazyPSNvjc84mFjoNIJ1//jUGxU8Zvs= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:organization :in-reply-to:references:mime-version:content-transfer-encoding; bh=DrWzZ4XkFZR5+vEIyVcds0H7Luoe8Er84JlUwbw4vGo=; b=H9vB4/rMVakRCaDZMA0ARARj28JGAkIxHBrw0/OwUtRHS7+0OE1mYJLnHr+e8g4+YF gL74se5VLpK9L1qwfj6onv38iF0EiUAiRoID9H7r/EeNoNAELz0zEm102NjLwV7N952j NY/+zS8GMy/2FYSGxMXpRzXI3/JtwHXdGLVctN/IwFO6jsNbOI/8vHewMYUqUsjZLPVJ TGU/beoZY4Xqrnfo0isfgjXJfEKw6Xe4nCSH2rwAHQ/G+w7B5nooBhjVqiKjY2s3n+dV 9ti1pUJXOtr9WGGDs1ScVP36CCYuX3EU7SQMiHEfs9DY1lNtVwahgwSKVivGZgIxfZYE 6sqQ== X-Gm-Message-State: AODbwcAqL9oKWahIQdkPG/otIS1Rh+thCBZlBSyhcFoecFlBUU7eTWh8 gfHmD54FW5DtfzWKUrA= X-Received: by 10.223.160.139 with SMTP id m11mr20274551wrm.99.1495689746640; Wed, 24 May 2017 22:22:26 -0700 (PDT) Received: from polaris.localnet (bzq-82-81-85-138.red.bezeqint.net. [82.81.85.138]) by smtp.gmail.com with ESMTPSA id a136sm5952120wme.26.2017.05.24.22.22.25 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 24 May 2017 22:22:25 -0700 (PDT) From: Gregory Etelson To: "Lu, Wenzhuo" Cc: "dev@dpdk.org" , "users@dpdk.org" , "Yigit, Ferruh" Date: Thu, 25 May 2017 08:22:23 +0300 Message-ID: <3497961.mUtAKJcRhq@polaris> Organization: Weka.IO In-Reply-To: <6A0DE07E22DDAD4C9103DF62FEBC09093B5BC9D5@shsmsx102.ccr.corp.intel.com> References: <8509342.3MbcxIPMKs@polaris> <1555038.6RsqslMA5V@polaris> <6A0DE07E22DDAD4C9103DF62FEBC09093B5BC9D5@shsmsx102.ccr.corp.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.15 Subject: Re: [dpdk-users] IXBGE VF: link state detection X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 May 2017 05:22:27 -0000 Hello, What about i40e VF PMD ? Does it have reliable link state monitoring ? Thank you. Regards, Gregory On Thursday, 25 May 2017 08:01:00 IDT Lu, Wenzhuo wrote: Hi Gregory, The mechanism is different. Kernel driver has a watchdog to check the link = state periodically. So, it can reset the link automatically. =20 =20 Best regards Wenzhuo Lu =20 *From:* Gregory Etelson [mailto:gregory@weka.io]=20 *Sent:* Thursday, May 25, 2017 11:45 AM *To:* Lu, Wenzhuo *Cc:* dev@dpdk.org; users@dpdk.org; Yigit, Ferruh *Subject:* Re: IXBGE VF: link state detection =20 Hello, In this case I would expect ixgbe VF bound to kernel driver also fail on link up detection In my tests, VFs bound to kernel drivers operate correctly. Regards, Gregory On Thursday, 25 May 2017 03:56:34 IDT Lu, Wenzhuo wrote: Hi Gregory, After you turned the port donw/up, PF will re-init the VF=E2=80=99s registe= rs. So, VF cannot work correctly. That=E2=80=99s why you can know link down= but not link up and have to reset the process. =20 =20 Best regards Wenzhuo Lu =20 *From:* Gregory Etelson [mailto:gregory@weka.io[1]]=20 *Sent:* Wednesday, May 24, 2017 5:50 PM *To:* dev@dpdk.org[2] *Cc:* users@dpdk.org[3]; Yigit, Ferruh; Lu, Wenzhuo *Subject:* IXBGE VF: link state detection =20 Hello, In my tests DPDK-17.05.0 process queries link state with rte_eth_link_get()= each 50 msec during 5-20 MB/sec IOs flow. I turn Ethernet switch port down and up and check IXGBE VF PMD reaction to = link state changes.=20 VF PMD correctly recognize link down events but may miss link up. When the fault occurs, subsequent calls to rte_eth_link_get will return lin= k_status =3D=3D 0 forever. I need to reset DPDK process to get correct link state value. My debugging shows that in case of the fault, mbx->ops.read(hw, &in_msg, 1,= 0) in ixgbe_check_mac_link_vf keeps returning non-zero value Regards, Gregory=20 =20 =2D------- [1] mailto:gregory@weka.io [2] mailto:dev@dpdk.org [3] mailto:users@dpdk.org