On Tue, 4 Nov 1997, Dave Huang wrote:

> On Tue, 4 Nov 1997, David A. Gatwood wrote:
> > On a 68k mac via ethernet???  Ouch!  MkLinux only seems to get ~300K/sec
> > on a 7600/120... and that's _not_ just disk overhead, because I tried
> > uploading to /dev/null and it still only sent at 300k/sec.  :-) 
> 
> Wow, really? I'd think that with the same ethernet chip as the AVs and DMA
> support (not the same DMA as the AVs though), it'd be able to do MUCH
> better than 300K/s. Sheesh, even my 33MHz 386 with a $10 ISA bus NE2000
> clone can sustain about 770K/s. :)
> 
> What was at the other end of the transfer, and what OS was it running? Was
> this a busy network? My tests were done with a P166 w/3C595 (PCI card) on
> my 3 computer LAN in my bedroom, and there was no other traffic on the
> net. If 300K/s is really the best MkLinux can do... well, ick! Their
> driver must really suck :)

The system was on a network that's not usually too highly loaded to a
SunOS 5.x Sparc of some variety (i.e. disk overhead on that end isn't much
of a problem). The performance this time improved slightly to 380k/sec,
but that's still bad compared to transferring the same file from the same
file to another sparc at 590k/sec (all numbers are approximate, given as
3.8e+02, thanks to the ftp program).

Transfers from globegate to itself appear to be a lot better (1.4
Megs/sec, or anywhere from 2.5 to 4.0 Megs/sec via the loopback), so part
of it must be the network, but the network's not _that_ loaded between
globegate and the computer center's boxes... (it's on a lightly loaded
10-base-t hub, connected by 10-base-2 almost directly to the fiber
transceiver, on what I think is the faculty network (otherwise it'd be a
dog slow network on the student network), which shouldn't even have so
much as a bridge before it gets to the sun boxes.  Dunno.  What's the max
transfer speed of a system under MacOS?  Transferring from a MacOS Ramdisk
across ten feet of ethernet on a near zero load hub....  To /dev/null....
The speed varied widely during the transfer, occasionally showing numbers
as high as 600k/sec, but in the end, 334k/sec.  Speed varied from
280k/sec. to a maximum of a little over 400k/sec.  It's not a perfect
benchmark, but the systems are almost directly connected (one 8 computer
hub).  I can try it again when the network is 100% idle, but....  I doubt
that'll make a 300k/sec. difference.  :-)


David

-----BEGIN GEEK CODE BLOCK-----
Version: 3.1
GCS/CC/FA/H/L/MC/M/MU/PA/TW d-@ s:>- a-- C++++>$ UBLAS*++++>$
P+?>$ L+++>$ !E--- W+++>$ N++(+++)>+++$ !o? K-? !w--- !O
M++>$ !V-- PS+>$ !PE- Y+>$ PGP+>$ t+++>$ 5+>++++$ !X- !R tv+>$
b++>$ !DI !D- G++(+++)>$ e>++++ h--! r--- !y-
------END GEEK CODE BLOCK------