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Date:      Tue, 23 Jan 2001 10:58:06 +0100
From:      Michel Talon <michel@lpthe.jussieu.fr>
To:        freebsd-mobile@FreeBSD.ORG
Subject:   Re: ed pccards/Netgear FA-410-TX with miibus
Message-ID:  <20010123105806.A481@lpthe.jussieu.fr>
In-Reply-To: <200101222312.f0MNC1913142@harmony.village.org>
References:  <20010122220857.A45526@cichlids.cichlids.com> <200101211331.aa14974@salmon.maths.tcd.ie> <200101220130.f0M1Un903366@harmony.village.org> <20010122220857.A45526@cichlids.cichlids.com> <200101222312.f0MNC1913142@harmony.village.org>

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On Mon, Jan 22, 2001 at 04:12:01PM -0700, Warner Losh wrote:
> In message <20010122220857.A45526@cichlids.cichlids.com> Alexander Langer writes:
> : ed1: device timeout
> 
> I've not seen this, but I'll test them harder.
> 
> : They seem to work, though.  I have 714 KB/s max throughout.  Is this
> : pccard which is the bottleneck?
> 
> I've maxed out at about 1500kB/s.  But if you do the math, you'll see
> that the pcmcia bus can do 6MHz of 16bit transactions, one per clock,
> for DMA.  That's 10-12MB/s at the high end if I'm doing the math
> right.  If your bridge is on an ISA bus, that limits you to 4.33MHz or
> about 8MB/s.  pio mode I think cuts this down to 1 transaction per
> microsecond (but that may be the ISA rate) which limits you to about
> 2MB/s for ISA.  If memory holds, the 6MHz is just a faster ISA bus
> timings, which would make the high end for programmed I/O at about
> 3MB/s.  That's about 4 times faster than what you are seeing.
> 

This looks strange to me. I have a D-Link card Version = 4.1, Manuf =
[D-Link], card vers = [DE-660] which is a plain 10Mb/s card and is recognized
by the ed driver as:
ed0 at port 0x240-0x25f irq 3 slot 1 on pccard1
ed0: address 00:80:c8:ba:87:88, type Linksys (16 bit) 
I get consistently 1.02 MB/s (each time, never any problem) on ftp transfers,
which seems to me optimal for 10 Mb/s wire. I cannot say the same with the
100Mb/s cards i have in desktops ( 3Com 3c905B-TX, and Intel Pro 10/100B/100+
Ethernet) which give me around 4-5 MB/s which is poor, when they don't stall
completely - this occured to me with the Intel card yesterday. The machine was
tetanized. I got fxp0 timeouts in the logs, tried without success to issue
some ifconfigs, rebooted and still had slow machine. Suddenly the card worked
again, mystery. I have seen messages in the French freebsd newsgroup with the
same symptoms.

-- 
Michel Talon


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