Date: Thu, 08 Mar 2001 18:45:00 -0800 From: Lars Eggert <larse@ISI.EDU> To: Mike Whitley <mwhitley@borg.proceon.com> Cc: freebsd-mobile@FreeBSD.ORG Subject: Re: Linksys PCMPC100 Message-ID: <3AA843AC.6ED8D472@isi.edu> References: <Pine.BSF.4.10.10103081709190.63378-100000@borg.proceon.com>
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[-- Attachment #1 --] Mike Whitley wrote: > Has anybody figured out what is causing performance problems > with the Linksys PCMPC100 card and the ed driver in 4.2? [forwarded another separate message from -stable which may help] > I have read all the posts I can and several people have > complained about poor performance under 4.2. I currently > can only get about 200KB/s on a 100Mbs switched network. > Under 3.3-stable I was getting around 1.2MB/s. This of > course is way off from the 5-8MB/s I get off my Sun and > Desktop FreeBSD box. I'm using the Nov-2000 release > of 4.2 (WC CDROM) and have tried all the pccard.conf configs, > switched interrupts, memory address etc. nothing improves > performance. Anybody have any ideas? One factor is the PCMCIA bus. You just won't see tens of megabits over that bus. However, 200KBps (~1.6Mbps) is low. (How did you measure that number, by the way?) Does the patch in my other mail make a difference? Also, I found that on some laptops, the PCMPC100 card works much better if you force the PCMCIA controller out of "polling" mode by explicitly assigning it a *free* IRQ in your kernel config file. As an aside: 5-8MB/s is a little low for a switched 100Mbps network for desktops (assuming local TCP transfers). Using netperf, I see around 10MBps (86.43Mbps) on an idle switched 100Mbps net. (Assuming you're not CPU bound, of course). Lars -- Lars Eggert <larse@isi.edu> Information Sciences Institute http://www.isi.edu/larse/ University of Southern California [-- Attachment #2 --] 0# *H 01 0 + 0 *H 00A#0 *H 01 0 UZA10U Western Cape10U Durbanville10 U Thawte1 0U Certificate Services1(0&U Personal Freemail RSA 1999.9.160 000824203008Z 010824203008Z0T10 UEggert1 0 U*Lars10U Lars Eggert1 0 *H larse@isi.edu00 *H 0 \p9 H;v r∩6"C?mxfJ f7I[3CF́L I - zHRVA怤2]0-bL)%X>nӅ w0u0*+e!0 00L2uMyffBNUbNJJcdZ2s0U 0 larse@isi.edu0 U 0 0 U #0`fUXF a#Ì0 *H _3 F=%nWY-HXD9UOc6ܰw f@uܶNԄR?Pr} E1֮23 mFhySwM_h|d yR= $P 00} 0 *H 01 0 UZA10U Western Cape10U Cape Town10U Thawte Consulting1(0&U Certification Services Division1$0"UThawte Personal Freemail CA1+0) *H personal-freemail@thawte.com0 990916140140Z 010915140140Z01 0 UZA10U Western Cape10U Durbanville10 U Thawte1 0U Certificate Services1(0&U Personal Freemail RSA 1999.9.1600 *H 0 iZ z]!#rLK~r$BRW{azr98e^eyvL>hpu t ,O 1ArƦ]D.Mօ>lx~@эWs0FO 7050U 0 0 U #0rIs4U vr~wƲ0 *H kY1rr`HU{gapm¥7؝(V\uoƑlfq|ko!6- -mƃRt\~ orzg,ks n Νc) ~U10001 0 UZA10U Western Cape10U Durbanville10 U Thawte1 0U Certificate Services1(0&U Personal Freemail RSA 1999.9.16#0 + 0 *H 1 *H 0 *H 1 010309024500Z0# *H 1$źc@?D6eYo;t0R *H 1E0C0 *H 0*H 0+0 *H @0 *H (0 *H g6ot͠>_PUw uh}qH"y7 L=,P_gvF;IM^+y=x(WB3ʙ2y<,"HY[q%C
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