Date: Wed, 17 Dec 1997 17:57:21 +1030 From: Greg Lehey <grog@lemis.com> To: sthaug@nethelp.no Cc: hackers@FreeBSD.ORG Subject: Re: 3com 3c509 card Message-ID: <19971217175721.26785@lemis.com> In-Reply-To: <19822.882343067@verdi.nethelp.no>; from sthaug@nethelp.no on Wed, Dec 17, 1997 at 08:17:47AM %2B0100 References: <19971217113801.53802@lemis.com> <19822.882343067@verdi.nethelp.no>
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On Wed, Dec 17, 1997 at 08:17:47AM +0100, sthaug@nethelp.no wrote: >> I've been doing some experiments with ftps on my local network, but >> the results have been puzzling, and until I know what's going on, I'm >> not going to go into too much detail. But I've noticed that I'm >> getting very high interrupt times on a P5/133 (up to over 50%) when >> receiving large files (40 MB). I've also noticed that the transfer >> starts at about 1 MB/s, but after about 10 MB there are problems, and >> the final transfer rate is often less than 500 kB/s. This is not what >> I measured on the same systems about a year ago. I may follow up on >> this if I find time. > > If you're trying to measure measure network performance, why don't you > use a tool which is suitable for the job? FTP is definitely not a good > tool for this job. Good idea. This wasn't so much "testing" as confirmation of what I had seen before. The results surprised me, so I took a closer look. > I'd suggest ttcp or NetPerf. Thanks. Where do I get them? > Btw, I've measured more than a megabyte/s myself with NE2000 clones > (Kingston) on a 486, using ttcp. Yes, there's more to this than meets the eye. But I don't know if I have time to look at it. Greg
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