Date: Mon, 11 Nov 2002 09:51:26 -0500 From: Mark Allman <mallman@grc.nasa.gov> To: freebsd-net@FreeBSD.ORG Cc: Fran.Lawas-Grodek@grc.nasa.gov, Cindy.Tran@grc.nasa.gov, Joseph Ishac <Joseph.Ishac@grc.nasa.gov>, bdimond@grc.nasa.gov Subject: Re: Problem in High Speed and Long Delay with FreeBSD Message-ID: <200211111451.JAA62850@guns.lerc.nasa.gov>
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> sockbuf datalen snd_time rcv_time > --------------------------------------------- > 16384 15000 0.000 0.617 > 150000 140000 0.003 4.021 > 500000 495000 0.015 14.083 > 1000000 995000 0.042 28.577 > 1500000 1490000 0.079 47.986 > 1600000 1590000 0.088 44.055 > 1800000 1790000 0.108 50.810 > 1900000 1890000 0.117 55.010 > 2000000 1990000 1.011 57.666 > 2100000 2090000 3.845 60.233 > 3000000 2990000 39.594 122.308 Folks- Thanks for all the suggestions. This is what I get for comparing apples and oranges. The results from above were hacked out late one night on my home machine (4.7) which is certainly not tuned as well as the lab machines Cindy and Fran have been using. It looks like I was limited by the number of mbuf clusters. The 4.1 machines at the lab are not. The kernel easily swallows any of the above amount of data. However... I will say that I think it is bogus that freebsd blocked my (asyncronous) write() call when it was out of mbuf clusters. I think it would be nice if that were fixed. Back to the drawing board... (Joe is digging through the TCP code and chasing a couple of things.) Thanks again! allman -- Mark Allman -- BBN/NASA GRC -- http://roland.grc.nasa.gov/~mallman/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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