by Josh Piepe » Fri, 25 Apr 1997 04:00:00
I have just recently changed from running MS-DOS on my computer to Linux
and have been trying to port a parallel port program I originally wrote
in Borland C++. However I can't seem to find which include
files/libraries I need to use out/outb and in/inb. I tried an assembler
routine, but I'm not very proficient, and I kept getting "Segmentation
Fault Core Dumped". Thanks in advance for any help.
-Josh Pieper
1. Reading/writing /usr/ports is VERY slow
Sysinstall reports a throughput of <10 KB/s when installing
the FreeBSD 2.2.7 ports collection from my 2x SCSI CD-ROM.
This is at least 10x slower than the throughput reported for
most other distributions. Also, my streaming tape starts and
stops a lot when backing up /usr/ports. When reading/writing
/usr/ports my disk drive sounds like a coffee grinder
(constantly seeking). Do other folks notice the same things?
I don't think there's anything wrong with my system in
particular, but I would like confirmation.
My system is an all-SCSI P90 with 32 MB and an Adaptec 2940.
/usr is on a Seagate Barracuda.
I suspect that this is an inherent performance problem with
FFS and large sparsely-populated directory trees. FFS
places each newly created directory in a different cylinder
group than its parent. If the directories have very little
in them (true for /usr/ports) this results in more time
spent seeking than reading/writing, which seems to be
what I am seeing.
--
Carl Mascott
uunet!world!cmascott
3. How to read/write com ports on PC?
6. How can I use X with 640x480 resolution instead of 800x600?
7. How do you read/write serial port registers directly?
10. Help needed -- Reading/writing serial ports
11. read/write serial ports in c
12. howto READ/WRITE serial ports?