that's pretty weird alright.  could you build a profiling kernel and
collect some kernel profile data of one of these ftp sessions?
(if you don't know how to do that, I'll send some instructions.)

-Chuck


On Wed, Nov 07, 2001 at 12:25:00AM +1100, David Johnston wrote:
> I've just built a current kernel with options NEWPMAP turned on, and I'm
> seeing a weird performance problem.
> 
> My machine is an upgraded 7500. It's got a 300Mhz G3 card and a PCI ATA/100
> controller (based around the CMD PCI0649 chip) with an attached ATA/100 disk.
> 
> Generally performance with the new pmap is the same as with the old, except
> when I transfer a file from an external machine to the ATA/100 disk using
> ftp (either using ftp 'put' from the external machine, or by using 'get'
> from the macppc machine). For this case I'm seeing terrible performance of
> < 500KB/s over 100 baseT, when with the old pmap I would get 5-7 MB/s.
> 
> I don't see the performance problem if I ftp to a disk on the machines'
> mesh SCSI bus, or if I copy the file to the ATA/100 disk over NFS.
> 
> Weird huh? Any ideas?
> 
> 	david
> 
> -- 
> David Johnston
> Email: david@canopus.apana.org.au	Mobile: 0402 088010