Chandra shekharc.2004@gmail.com wrote:

Hello!

I am running CentOS-5 with latest kernel available by deault (2.6.23). I installed it on a Dell XPS machine having Intel Quad processors (4 parallel cpus). I use it to run a computational program and I need to keep the program running for 1-2 months continuously. I generally boot it in runlevel-3 with network ON without X and use ssh from another machine to connect and run the program using the "nohup" utility.

However, the system automatically gets suspended (the computational program stops, ssh stops working, whole the OS seems to be freezing) after 4-5 hours. I have stopped the "acpid" daemon and boot the kernel with "acpi=off" option in "grub.conf" but no help. The kernel log ( /var/log/messages) doesn't show anything special. After the instant of suspension, kernel also stops logging into "/var/log/messages".

Please help me out. I think there is a kernel problem. I have run programs for days and days continuously using FC5 (which had older kernel). I can't use FC5 or older version of CentOS because I need GCC-4.1.2+ to compile parallel OpenMP program.

Thank you,

Chandra

What do you have to do to get the box out of "suspend?" If the system is frozen and you have to reboot the box to "unfreeze" it, I'd guess it's a heat issue.

Cheers, Dave