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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
Old 10-03-2009
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
 

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PARALLEL-SCP(1) 														   PARALLEL-SCP(1)

NAME
parallel-scp - parallel versions of scp SYNOPSIS
parallel-scp [OPTIONS] -h hosts.txt local remote DESCRIPTION
pssh provides a number of commands for executing against a group of computers, using SSH. It's most useful for operating on clusters of homogenously-configured hosts. parallel-scp copy files in parallel to a set of machines. OPTIONS
-r --recursive recusively copy directories (OPTIONAL) -h --hosts hosts file (each line "host[:port] [user]") -l --user username (OPTIONAL) -p --par max number of parallel threads (OPTIONAL) -o --outdir output directory for stdout files (OPTIONAL) -e --errdir output directory for stderr files (OPTIONAL) -t --timeout timeout (secs) (-1 = no timeout) per host (OPTIONAL) -O --options SSH options (OPTIONAL) -v --verbose turn on warning and diagnostic messages (OPTIONAL) EXAMPLE
The following example runs hostname on three machines (IPs or hostnames) specified in the file ips.txt using login irb2 and saves the output in /tmp/foo. # parallel-scp -h ips.txt -l irb2 /etc/hosts /tmp/hosts Success on 128.112.152.122:22 Success on 18.31.0.190:22 Success on 128.232.103.201:22 ENVIRONMENT
All four programs take similar sets of options. All of these options can be set using the following environment variables: o PSSH_HOSTS o PSSH_USER o PSSH_PAR o PSSH_OUTDIR o PSSH_VERBOSE o PSSH_OPTIONS SEE ALSO
parallel-ssh(1), parallel-slurp(1), parallel-nuke(1), parallel-rsync(1), ssh(1), scp(1), AUTHOR
Brent N. Chun <bnc@theether.org> COPYING
Copyright: 2003, 2004, 2005, 2006, 2007 Brent N. Chun NOTES
1. bnc@theether.org mailto:bnc@theether.org 03/30/2009 PARALLEL-SCP(1)
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