From owner-freebsd-questions@FreeBSD.ORG Tue Oct 26 19:45:58 2004 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 41D8416A4CE for ; Tue, 26 Oct 2004 19:45:58 +0000 (GMT) Received: from mx2.mail.ru (mx2.mail.ru [194.67.23.122]) by mx1.FreeBSD.org (Postfix) with ESMTP id ED05243D54 for ; Tue, 26 Oct 2004 19:45:57 +0000 (GMT) (envelope-from infofarmer@mail.ru) Received: from [83.237.61.203] (port=2602 helo=[172.17.0.70]) by mx2.mail.ru with esmtp id 1CMXGW-000PSZ-00 for questions@freebsd.org; Tue, 26 Oct 2004 23:45:56 +0400 Message-ID: <417EA97A.9000206@mail.ru> Date: Tue, 26 Oct 2004 23:46:02 +0400 From: "Andrew P." User-Agent: Mozilla Thunderbird 0.8 (Windows/20040913) X-Accept-Language: en-us, en MIME-Version: 1.0 To: questions@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam: Not detected Subject: Network speed mysteries X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: infofarmer@mail.ru List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 26 Oct 2004 19:45:58 -0000 Dear friends I have just stumbled upon a phenomena, which I cannot believe is real, though I reproduced it easily. Some days ago I have set up a FreeBSD-4.10 file-server. I have a small network in my room (3 boxes, 100Mbps). I uploaded some files from my Windows 2000 PC, using the latest version of FileZilla client. The speed was pretty constant at 9.5Mbytes/s. Two days ago I switched to Windows XP SP2, reinstalled all the software and was taken aback when I tried to upload some more files and the speed never exceeded 3.5Mb/s. I browsed and googled for some hours, made dozens of assumptions, tried to reconfigure both Windows and FreeBSD - but it was all in vain. Just an hour ago I decided to rebuild the file-server kernel - and it takes time to build it there, as it's an old Celeron box with little RAM. By coincidence, some files were being uploaded just when I entered "make buildkernel ...". I looked at FileZilla windows, expecting to see the speed drop - but WOW! - the speed was at 7Mbytes/s!!! It then hovered around 6.5-9Mbytes/s while the kernel was being built! I waited for some minutes until the kernel was finally built - and the upload speed dropped back to 2.5-3.5Mb/s. I couldn't believe it - and I still can't - so I waited and built a kernel once more - with all the same effects on speed! It's worth to mention, that when I was installing the built kernel, the speed didn't change from usual 3Mb/s. Please let me know what the heck is going on - or just what you think about it. Best regards, Andrew P.