Re: shared memory in computational chemistry

2007-04-11 Thread Anthony DeRobertis
On Fri, Apr 06, 2007 at 03:39:28PM -0700, Francesco Pietra wrote: > > QUESTIONS: > 1) How to set shmmax in debian? Look in /proc/sys/kernel ... there are several shared memory parameters there. [Not sure about the rest] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubs

Re: shared memory in computational chemistry

2007-04-07 Thread Dave Ewart
On Saturday, 07.04.2007 at 14:02 -0400, Greg Folkert wrote: > On Sat, 2007-04-07 at 18:53 +0100, Dave Ewart wrote: > > On Saturday, 07.04.2007 at 12:08 -0400, Greg Folkert wrote: > > > > > On Sat, 2007-04-07 at 16:06 +0100, Dave Ewart wrote: > > > > On Friday, 06.04.2007 at 15:39 -0700, Francesco

Re: shared memory in computational chemistry

2007-04-07 Thread Greg Folkert
On Sat, 2007-04-07 at 18:53 +0100, Dave Ewart wrote: > On Saturday, 07.04.2007 at 12:08 -0400, Greg Folkert wrote: > > > On Sat, 2007-04-07 at 16:06 +0100, Dave Ewart wrote: > > > On Friday, 06.04.2007 at 15:39 -0700, Francesco Pietra wrote: > > > > > > > 1) How to set shmmax in debian? > > > >

Re: shared memory in computational chemistry

2007-04-07 Thread Dave Ewart
On Saturday, 07.04.2007 at 12:08 -0400, Greg Folkert wrote: > On Sat, 2007-04-07 at 16:06 +0100, Dave Ewart wrote: > > On Friday, 06.04.2007 at 15:39 -0700, Francesco Pietra wrote: > > > > > 1) How to set shmmax in debian? > > > > For the running kernel, echo a value to /proc/sys/kernel/shmmax

Re: shared memory in computational chemistry

2007-04-07 Thread Greg Folkert
On Fri, 2007-04-06 at 15:39 -0700, Francesco Pietra wrote: [context clipped] > QUESTIONS: > 1) How to set shmmax in debian? shmmax is auto set on the Linux Kernel these days, you can set it but it may or maynot be changed by the kernel itself. But based on documentation of the default kernel VM

Re: shared memory in computational chemistry

2007-04-07 Thread Greg Folkert
On Sat, 2007-04-07 at 16:06 +0100, Dave Ewart wrote: > On Friday, 06.04.2007 at 15:39 -0700, Francesco Pietra wrote: > > > 1) How to set shmmax in debian? > > For the running kernel, echo a value to /proc/sys/kernel/shmmax - to > make it a permanent setting (i.e. set automatically at subsequent

Re: shared memory in computational chemistry

2007-04-07 Thread Dave Ewart
On Friday, 06.04.2007 at 15:39 -0700, Francesco Pietra wrote: > 1) How to set shmmax in debian? For the running kernel, echo a value to /proc/sys/kernel/shmmax - to make it a permanent setting (i.e. set automatically at subsequent reboots), include the setting in /etc/sysctl.conf: kernel.shmmax

shared memory in computational chemistry

2007-04-06 Thread Francesco Pietra
My quantum mechanical computational software (running on amd64 etch with 3700mb per node, total ram 16GB) is implicitly using shared memory segments to speed up transfer outside the kernel. It is unable to allocate a 38731776bytes segment, and the computation dies. In fact, command "ipcsl -l" retu