From owner-chemistry@ccl.net Wed Oct  5 15:26:00 2011
From: "David Close closed~~etsu.edu" <owner-chemistry[#]server.ccl.net>
To: CCL
Subject: CCL:G: G98 and G03 on 4-core machines
Message-Id: <-45582-111005152444-3487-UtyzUR6SapzlwoxqiAFInA[#]server.ccl.net>
X-Original-From: "David  Close" <closed=-=etsu.edu>
Date: Wed, 5 Oct 2011 15:24:41 -0400


Sent to CCL by: "David  Close" [closed]~[etsu.edu]
I have been using G98 on a quad core machine for a number of years.  This is a 32-bit version of the program.  One has to assign memory to the 4 processor with a command like:  echo 356515840 >/proc/sys/kernel/shmmax, and add the line Nprocs=4 to the input.  I am visiting a lab that has G03 installed on a 64-bit machine.  It seems to be running ok, but things are different.  On the 32-bit machine I can see 4 processors running with a ps command.  On the 64-bit machine I see only 1 l502 job.  Is this normal?  Also it doesnt seem to be necessary to divide up available memory on the 64-bit machine.  Why is this?
Regards, Dave Close.