From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id A7BA3A0A02 for ; Thu, 14 Jan 2021 19:50:44 +0100 (CET) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 97D82140D09; Thu, 14 Jan 2021 19:50:44 +0100 (CET) Received: from out2-smtp.messagingengine.com (out2-smtp.messagingengine.com [66.111.4.26]) by mails.dpdk.org (Postfix) with ESMTP id CC6B5140CF2 for ; Thu, 14 Jan 2021 19:50:42 +0100 (CET) Received: from compute2.internal (compute2.nyi.internal [10.202.2.42]) by mailout.nyi.internal (Postfix) with ESMTP id 81B685C0113; Thu, 14 Jan 2021 13:50:42 -0500 (EST) Received: from mailfrontend2 ([10.202.2.163]) by compute2.internal (MEProxy); Thu, 14 Jan 2021 13:50:42 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=monjalon.net; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding:content-type; s=fm3; bh= 1DFqlyn7ZOFgpysz2u0pbCgWa491z+rV5iOD6QD80kU=; b=SXklpmXaaxz0NLm+ 9zIgVBDZfCpflgSyzRjdiN3261LOBeHbgDO1f3xBpic1mIW/aW6mfipB8fviZm8p qJCjTZt+sagFQd5gI6jxGrMvL7Ya5t8fH+E2HIGHOSR6tR6ENQIUgsuaFCiis3Uk cZJJ7E6ziNVziAwJrsw6tLnKUKRh1bSrblZdm7NvdFQtSSOduS+tbKY0t8lKsUDT HY6NcPkMIj/VvuZ3HHYDHe1anTFcM4o38PDgrx57qrXdtQiGZDoTakA1cspG0fqD i7i/DeezTKBHuLqx0oUxQWofFDdipTV3EyAordLoxHVgS6dMZlJhpugRQrnmtXF+ XlSIOA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:content-type :date:from:in-reply-to:message-id:mime-version:references :subject:to:x-me-proxy:x-me-proxy:x-me-sender:x-me-sender :x-sasl-enc; s=fm1; bh=1DFqlyn7ZOFgpysz2u0pbCgWa491z+rV5iOD6QD80 kU=; b=SbRn/uW9Ry2WqKPkpEUrDY/RTUWIc5DI/jeanfAdhFubxITpC4afI77E0 sfN238iD+POu0ooF6G3hmyudYQPeI3DWmnXc/X01VL9CcuD+PxVVmWEkfbok5G1t DV5pM9LGhomtylsqFMPJ07fhgsGv7zE+Rc40XOX15VBODb9JQBFaonMtO6Xd1dlo qQ+G9Buj0GIRxZ+0dzs8V/kLZFDon4TR7hpOiVqljh73G9b7Wi4uuHC/GCx2ErgB SeFz8wxgunQhT77cRiv/i1YGO/5bqxCbBM8paAvchezMF8YDNZGAnZdWeGHhdLtG x1I//aZ8XZpwREuT2eQlQV/+N1OEQ== X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduledrtddtgdelfecutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenuc fjughrpefhvffufffkjghfggfgtgesthfuredttddtvdenucfhrhhomhepvfhhohhmrghs ucfoohhnjhgrlhhonhcuoehthhhomhgrshesmhhonhhjrghlohhnrdhnvghtqeenucggtf frrghtthgvrhhnpeehieffuedugeeggefhjeffgfeileduheelgefhieetiedvhfevvdfh gedtuddvheenucffohhmrghinhepihhnthgvrhhruhhpthhsrdgtrghtnecukfhppeejje drudefgedrvddtfedrudekgeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhep mhgrihhlfhhrohhmpehthhhomhgrshesmhhonhhjrghlohhnrdhnvght X-ME-Proxy: Received: from xps.localnet (184.203.134.77.rev.sfr.net [77.134.203.184]) by mail.messagingengine.com (Postfix) with ESMTPA id AFF271080066; Thu, 14 Jan 2021 13:50:41 -0500 (EST) From: Thomas Monjalon To: madhukar mythri Cc: users@dpdk.org, Yong Wang Date: Thu, 14 Jan 2021 19:50:40 +0100 Message-ID: <9703725.R88ScZ5S0C@thomas> In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Subject: Re: [dpdk-users] Does vmxnet3 PMD supports LSC=1 ? X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: users-bounces@dpdk.org Sender: "users" +Cc Yong Wang, maintainer of this PMD. 14/01/2021 18:30, madhukar mythri: > Hi, > > Does vmxnet3 PMD support LSC=1(i.e with interrupt mode) for link changes ? > > When i enable LSC=1 the functionality works fine, but, when pumping traffic > i'm seeing increasing in CPU load on some cores which is running > "eal-intr-thread" epoll_wait() function for more CPU-time. > > Actually, interrupt should come only when Link changes, but, we are seeing > interrupt for each incoming Rx-packet and also a lot of spurious interrupts. > ============= > ~ # cat /proc/interrupts |grep igb > 58: 1254293 0 0 0 PCI-MSI 1572864-edge > igb_uio > 59: 1278105 0 0 0 PCI-MSI 5767168-edge > igb_uio > ~ # cat /proc/irq/58/spurious > count 98035 > unhandled 0 > last_unhandled 0 ms > ~ # > ============== > > Does anyone tried LSC=1 in vmxnet3 PMD based apps and faced similar issues > ? If so, please let me know. > > Tried with DPDK-18.11, DPDK-19.11 and DPDK-20.05. > > Thanks, > Madhukar.