From owner-freebsd-net@freebsd.org Thu Aug 11 16:36:23 2016 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 25F0EBB611A for ; Thu, 11 Aug 2016 16:36:23 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mail-io0-x22f.google.com (mail-io0-x22f.google.com [IPv6:2607:f8b0:4001:c06::22f]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id E17C71577 for ; Thu, 11 Aug 2016 16:36:22 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: by mail-io0-x22f.google.com with SMTP id q83so1143927iod.1 for ; Thu, 11 Aug 2016 09:36:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=2yL/Mk0WgXmH6pu7JIYZKDUSAgkQD5VEdldrWTDCuus=; b=SadbWdGdLIIu43PFlj6ItPaaLQ0UQfw1EJskao9FoRyR9/prOaSG1ReeecHFhxbgKq fLDokotaZH3jD9zablmmR5xTbhOtpS6nMh5Sw7p9PO4S1eLPoNcWpBinDRQmWlr5/J4I a9OHFLhZcSpznXUiAw0AOjL/3k+I90Qw0EKfUVVT1NcEiVpcnq5wEbNpzu0JsUHq4ApC QJCmw/SBvp2tUDfBtQ6tVf2i1CrHKTRVolhIr/TJdxSyB/AgPKaIbKTA3d+9tHJP0QrC PbZwq4G6oCQ0TZ5z286yk1wN8ZRgaMEj+2HYT9/EY2EdtzmcLBTdz2peplWT/+w8SIE+ FKPw== 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:from:date :message-id:subject:to:cc; bh=2yL/Mk0WgXmH6pu7JIYZKDUSAgkQD5VEdldrWTDCuus=; b=BlKKGMQoFXHUWzzn1sZ+AjSfKAJfwpDeHFWVVdeIlduYtI2lqay92M6yBNVmMzxwJX HtMPbCexdJTXYUP47VEf22IHaaubp7zZ2FFImmgcaD5ltc0NSmhNulq2bKBCPSGdFC96 VZ6EhjdpguEBwTbF0xDK+XHdR6denuTxt3LaweAS6Pein7pItL156V6ovmy0uy7QYD6S a8iF/Sw5DmfE3bWI77l6priNUjb0YT9IticV70XfBWk1obD2t059jnO4KViYwWu2uGD4 ccFr+EdttnYkeZPyTy3nN/t9ig40KbwZCevGGbIIrDJTGHoSTsmhqALutbA0SevB0JZS wfvQ== X-Gm-Message-State: AEkoousCiZRvN7ScAA0sOjElSzoNwIaop1tUOlz7WofaBAQKBkp/hi4XczS7B96iPdDeE6ETag2sq44+X3hWGQ== X-Received: by 10.107.15.229 with SMTP id 98mr12352991iop.123.1470933382318; Thu, 11 Aug 2016 09:36:22 -0700 (PDT) MIME-Version: 1.0 Received: by 10.36.141.129 with HTTP; Thu, 11 Aug 2016 09:36:21 -0700 (PDT) In-Reply-To: <7DD30CE7-32E6-4D26-91D4-C1D4F2319655@gmail.com> References: <3C0D892F-2BE8-4650-B9FC-93C8EE0443E1@gmail.com> <3B164B7B-CBFB-4518-B57D-A96EABB71647@gmail.com> <5D6DF8EA-D9AA-4617-8561-2D7E22A738C3@gmail.com> <7DD30CE7-32E6-4D26-91D4-C1D4F2319655@gmail.com> From: Adrian Chadd Date: Thu, 11 Aug 2016 09:36:21 -0700 Message-ID: Subject: Re: Unstable local network throughput To: Ben RUBSON Cc: FreeBSD Net Content-Type: text/plain; charset=UTF-8 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Aug 2016 16:36:23 -0000 Hi! mlx4_core0: mem 0xfbe00000-0xfbefffff,0xfb000000-0xfb7fffff irq 64 at device 0.0 numa-domain 1 on pci16 mlx4_core: Initializing mlx4_core: Mellanox ConnectX VPI driver v2.1.6 (Aug 11 2016) so the NIC is in numa-domain 1. Try pinning the worker threads to numa-domain 1 when you run the test: numactl -l first-touch-rr -m 1 -c 1 ./test-program You can also try pinning the NIC threads to numa-domain 1 versus 0 (so the second set of CPUs, not the first set.) vmstat -ia | grep mlx (get the list of interrupt thread ids) then for each: cpuset -d 1 -x Run pcm-memory.x each time so we can see the before and after effects on local versus remote memory access. Thanks! -adrian