From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: <thomas@monjalon.net> Received: from out5-smtp.messagingengine.com (out5-smtp.messagingengine.com [66.111.4.29]) by dpdk.org (Postfix) with ESMTP id 38E7414EC for <dev@dpdk.org>; Tue, 6 Nov 2018 10:13:58 +0100 (CET) Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailout.nyi.internal (Postfix) with ESMTP id B57FB21F58; Tue, 6 Nov 2018 04:13:57 -0500 (EST) Received: from mailfrontend1 ([10.202.2.162]) by compute1.internal (MEProxy); Tue, 06 Nov 2018 04:13:57 -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=mesmtp; bh=6ARUyDAdEwDUJvlM9KDMifQXVXMoIRT3l6/Oia3gwPc=; b=pm/Z1Uapc/1D 7HxSOcEeuZOOrB0vROyAbxMKx1H/D7g1prNKo7z3ueAQB/FciGvYMgltWhAUF8cy egC4+6DqVynUxDV2UHAUHMUh83N1vw14CUw2/wX+4jIqCVWMZ8b22HuO7H1Wum3e LB/FHFoPfElM/w5V/9OE9NVRvRFUepI= 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=6ARUyDAdEwDUJvlM9KDMifQXVXMoIRT3l6/Oia3gw Pc=; b=OTkobyITloE6hzsxg2baNgJL4jEKjF3tIbeGrMcpPF6KPJYhE5x74QBXD CGw0jl4YbT9wI2CEdqP91Khz/+m0eZc5mq6wliPS9ZFH0iLtUg3C0o4t/39NoHxG c002KPLpAMAFajMSs0732ZDeVULt2dxgrJ+hSTJw67oJzZWvhXprJ4DXza3ej0XJ 7aZOhs5ckkah/wU2dTTXMVHWgU9eva2V3ZSVpOa+PwjNbrM46OFb9Yy5DKF3OZAN U9oJa88pXRKxbxtyIttbm7M/r0A+IXAyr7PqIcHe2dYQKZ+0AjnwNfDdRDitxGSA RDESLNe7OquiYcpjKrAD9dSjr4TNw== X-ME-Sender: <xms:VFvhW7cg2dEz15usmLZWEeAlyCS-Zd9f87fvOZ9064iHvohUa0Focw> X-ME-Proxy: <xmx:VFvhW5Mgkpb6uEcM7ZxtG3XYw6xYGSkThYU5Hel3UcyOW_kXiIx6yQ> <xmx:VFvhWwb_3DpPIQsWuwh-3EbE-PqdmWg_oKSG023qLTVVSDk9enihlQ> <xmx:VFvhWzkO-cYnsHELeWDVM_Scm_HOYvRqyIThsRygJM4ETLU_pJaiCQ> <xmx:VFvhWzDwAug5uqNpN9VTwLiYamnr-z0ea0GPeEArcTzXRtaKYPM8yw> <xmx:VFvhWwzLG360xuSgoZ0s-vAf7Q5jhtsLfH--OWPKlHJCP4Aak1UOog> <xmx:VVvhW6vJ1u9R-DGK14ZE5O8Y6suFOKDPSIOLKRsuMPLOqLPvLN4MXA> Received: from xps.localnet (184.203.134.77.rev.sfr.net [77.134.203.184]) by mail.messagingengine.com (Postfix) with ESMTPA id BA63DE427A; Tue, 6 Nov 2018 04:13:54 -0500 (EST) From: Thomas Monjalon <thomas@monjalon.net> To: Jerin Jacob <jerin.jacob@caviumnetworks.com> Cc: Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>, "bruce.richardson@intel.com" <bruce.richardson@intel.com>, "pablo.de.lara.guarch@intel.com" <pablo.de.lara.guarch@intel.com>, "dev@dpdk.org" <dev@dpdk.org>, "yipeng1.wang@intel.com" <yipeng1.wang@intel.com>, Dharmik Thakkar <Dharmik.Thakkar@arm.com>, "Gavin Hu (Arm Technology China)" <Gavin.Hu@arm.com>, nd <nd@arm.com>, "ferruh.yigit@intel.com" <ferruh.yigit@intel.com>, "hemant.agrawal@nxp.com" <hemant.agrawal@nxp.com>, "chaozhu@linux.vnet.ibm.com" <chaozhu@linux.vnet.ibm.com>, "Kapoor, Prasun" <Prasun.Kapoor@cavium.com> Date: Tue, 06 Nov 2018 10:13:53 +0100 Message-ID: <4202399.UOW9WdkMPh@xps> In-Reply-To: <20181106090953.GA5671@jerin> References: <1540532253-112591-1-git-send-email-honnappa.nagarahalli@arm.com> <AM6PR08MB3672DD10D2BEAEB58599B7BD98CB0@AM6PR08MB3672.eurprd08.prod.outlook.com> <20181106090953.GA5671@jerin> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Subject: Re: [dpdk-dev] [PATCH v7 4/5] hash: add lock-free read-write concurrency X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions <dev.dpdk.org> List-Unsubscribe: <https://mails.dpdk.org/options/dev>, <mailto:dev-request@dpdk.org?subject=unsubscribe> List-Archive: <http://mails.dpdk.org/archives/dev/> List-Post: <mailto:dev@dpdk.org> List-Help: <mailto:dev-request@dpdk.org?subject=help> List-Subscribe: <https://mails.dpdk.org/listinfo/dev>, <mailto:dev-request@dpdk.org?subject=subscribe> X-List-Received-Date: Tue, 06 Nov 2018 09:13:58 -0000 06/11/2018 10:10, Jerin Jacob: > From: Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com> > > Jerin, thank you for running this test and all the analysis. I have not run this test. I was focused on simultaneous reads and writes. You can look at file test_hash_readwrite_lf.c to look for the kind of the use cases. > > > > I am trying to reproduce this, I will get back with more details soon. > > OK. Since RC2 approaching, bit worried about next steps if we cannot > avoid the regression with this new feature for this release. 18.11-rc2 is already out. > 24% drop of performance regression not seen in past for a specific > usecase.So not sure what we did past for similar situations. > > Thomas, > Any thought of this? Everything is possible, you just need to agree on a patch. Please let's fix (or disable or revert) it in -rc3 this week.