Date: Tue, 26 Oct 2004 23:46:02 +0400 From: "Andrew P." <infofarmer@mail.ru> To: questions@freebsd.org Subject: Network speed mysteries Message-ID: <417EA97A.9000206@mail.ru>
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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.
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