From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) by finch.gentoo.org (Postfix) with ESMTP id 63ADE1381F3 for ; Fri, 27 Sep 2013 15:55:50 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 768C3E0E98; Fri, 27 Sep 2013 15:55:45 +0000 (UTC) Received: from mail-ee0-f43.google.com (mail-ee0-f43.google.com [74.125.83.43]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id 40860E0D14 for ; Fri, 27 Sep 2013 15:55:43 +0000 (UTC) Received: by mail-ee0-f43.google.com with SMTP id e52so1326483eek.30 for ; Fri, 27 Sep 2013 08:55:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:subject:references :in-reply-to:content-type:content-transfer-encoding; bh=dpZAOzpHEKon65/tTvqo2nA/WASIJKnF+vanO9sn7Dk=; b=ILvCTJu7R9sHqETYwDa08vjp/Yn7lys94OcBpN1zkDT++XcFd4gU0pjJ5N38nc8UA/ COlOs1ppi9kpr6L/GC5bHdzpzsOFBamQabu62prv4wrP4nqKFEThPkWWKAlYnB7/vBzG 4o8bSvCeFN/K+9+blmpMpD+xe186zveSOdDvmJQrZtM9kaDpdnDwKUmcE0NbJ7qDizZz EKQcFW53yNTofwq47aizqhZMRCm6J+YspNNfac+KqSNCDD64BVtD6IXXV2HgklWLTetV A4b7GuQr+dIAYkwpdIiDR9ZaIQomgpBFItqQ8or2ckJjILDdnPojnH2KDbFMo8M464uq ckKQ== X-Received: by 10.15.99.72 with SMTP id bk48mr11544268eeb.22.1380297342670; Fri, 27 Sep 2013 08:55:42 -0700 (PDT) Received: from [192.168.178.21] (p3E9E704B.dip0.t-ipconnect.de. [62.158.112.75]) by mx.google.com with ESMTPSA id k7sm17552808eeg.13.1969.12.31.16.00.00 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 27 Sep 2013 08:55:42 -0700 (PDT) Message-ID: <5245AA7D.1090903@googlemail.com> Date: Fri, 27 Sep 2013 17:55:41 +0200 From: Volker Armin Hemmann User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130922 Thunderbird/17.0.9 Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Slow network transfers ... lost interrupts because of clocksource? References: <52455F01.4060102@xunil.at> In-Reply-To: <52455F01.4060102@xunil.at> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Archives-Salt: a7d0d564-a752-458c-bd2f-25cecbf31cb6 X-Archives-Hash: 2691d7ad03d0a7205ccbadb1677b20b7 Am 27.09.2013 12:33, schrieb Stefan G. Weichinger: > I am back from my visit at a customer where I installed a new and shiny > gentoo server for running VMs (KVM). > > Currently I don't have access as my VPN only works from my static IP at > home (my router seems to be offline right now ... and I am still away > from office for the weekend) so I can't check details now ... > > basically: > > I tried to copy/rsync some file with ~8GB over a gigabit connection ... > from old to new server. Checked ethtool for gigabit, looked ok. I always > saw the behavior that the transfer started rather fast and slowed down > within minutes. Let's say ~50 MB/s in the start and then down to maybe 2 > or so. That is way from the expected throughput with such new hardware. > > The NICs in the new server are BCM-something, Broadcom, using the tg3 > Tigon module (exact model not available right now as mentioned above). > > In "dmesg" I see lines like > > hpet1: lost 1 rtc interrupts > > which makes me wonder if that leads to the lousy performance (btw, I > fear slow virtualization performance as well). > > Dealing with HPET I checked for kernel support and also added kernel > options to GRUB: > > hpet=force clocksource=hpet > > which lead to > > # cat /sys/devices/system/clocksource/clocksource0/current_clocksource > hpet > > I am unsure if I should further investigate things around this HPET-issue? > > My thinkpad here shows "tsc" as clocksource ... good/better ? faster, if it works. Completely broken, if it doesn't. > What direction to go? force or disable HPET? > > neither