C POSIX: Analyze a Boggle board using 100% CPU on a quad core. Post: 302358657

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Top Forums Programming C POSIX: Analyze a Boggle board using 100% CPU on a quad core. Post 302358657 by HeavyJ on Saturday 3rd of October 2009 09:21:01 PM

10-03-2009

Registered User

Ubuntu 9.04

g++

Done in a Terminal.

If you are serious about helping me use 100% CPU, I will send you the code (all of it). Know that I have spent a solid two months developing this work, and it is to my knowledge the most advanced program set of its kind.

Simply put, I will be very unhappy if I never hear from you again, after giving you any part of my code.

I graduated as an aerospace engineer in 2005, and I have never had a job in that industry, so I turned to an area of study with almost no material costs.

I used POSIX because it seems to be incorporated into the C standard. I have a serious problem using any code developed for particular machines or operating systems.

What would your choice be to implement a real micro-parallel algorithm such as my Boggle analysis scheme? Why is POSIX a bad choice for true parallel performance?

Thanks a lot, fpmurphy

HeavyJ

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LEARN ABOUT MINIX

vpo

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