[PARPORT] strange r/w behavior with 1.40


Tim Moore (tmoore@nsr500.Eng.Sun.COM)
Fri, 20 Feb 1998 15:20:10 -0800


2.0.32 kernel, /dev/sda, pretty standard stuff. Started w new
disk, deleted dos partition, made ext2 partition, mke2fs, ended
up with 31 unallocated sectors, HOWEVER, mke2fs went into
uninterruptable sleep mode that took several times to kill off.

Eventually made it through fsck. Read and write performance
slow by 5x (except for direct dd from /dev/sda4 to /dev/null).

Autoprobe finds EPP 1.9 (software direction). booted with
mode = 4, 32bit write. I'll be trying all the mode/PEDANTIC
combos this weekend, but was wondering if you've any suggestions
for debug checkpoints. I'm going to try tracing the driver this
weekend if the boot config combos don't reveal anything. All
suggestions welcomed.

Under DOS I get about 410KB/s with the same hardware so it's
probably minor and obvious.

dmesg, bizarre fsck & other in attached.

regards,
tim.

nsr500% unzip -l slowzip
 Length Date Time Name ("^" ==> case
 ------ ---- ---- ---- conversion)
   7260 02-20-98 03:03 slowzip.txt
 ------ -------
   7260 1
nsr500% sum slowzip.zip
33309 3

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This archive was generated by hypermail 2.0b3 on Wed 30 Dec 1998 - 10:17:29 EST