06-30-2011
Parallel Processing Detection and Program Return Value Detection
Hey, for the purpose of a research project I need to know if a specific type of parallel processing is being utilized by any user-run programs. Is there a way to detect whether a program either returns a value to another program at the end of execution, or just utilizes any form of parallel processing? This is without having access to the source code of the program. Help please.
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VPO(4) BSD Kernel Interfaces Manual VPO(4)
NAME
vpo -- parallel to SCSI interface driver
SYNOPSIS
device vpo
For one or more SCSI busses:
device scbus
DESCRIPTION
The vpo driver provide access to parallel port Iomega Zip and Jaz drives.
HARDWARE
The vpo driver supports the following parallel to SCSI interfaces:
o Adaptec AIC-7110 Parallel to SCSI interface (built-in to Iomega ZIP drives)
o Iomega Jaz Traveller interface
o Iomega MatchMaker SCSI interface (built-in to Iomega ZIP+ drives)
USAGE
The driver should let you use a printer connected to the drive while transferring data.
DOS and FreeBSD file systems are supported. When mounting a DOS file system or formating a FreeBSD file system, check the slice of the disk
with the fdisk(8) utility.
In order to unixify a ZIP disk, put the following in /etc/disktab:
zip|zip 100:
:ty=removable:se#512:nc#96:nt#64:ns#32:
:pa#196608:oa#0:ba#4096:fa#512:
:pb#196608:ob#0:bb#4096:fb#512:
:pc#196608:oc#0:bc#4096:fc#512:
and use bsdlabel(8).
If you have trouble with your driver, your parallel chipset may not run properly at the detected mode (NIBBLE, PS2 or EPP). Tune the ppc(4)
bootflags to force other modes.
SEE ALSO
da(4), lpt(4), ppbus(4), ppc(4), scsi(4)
HISTORY
The vpo manual page first appeared in FreeBSD 3.0.
AUTHORS
This manual page was written by Nicolas Souchu.
BUGS
During boot, the driver first tries to detect a classic ZIP, then a ZIP+. The ZIP+ detection is intrusive and may send erroneous characters
to your printer if the drive is not connected to your parallel port.
BSD
December 14, 2004 BSD