Re: Disable RAM
Tim Frink wrote: I want to test how a program would run with a reduced physical memory. The machine has currently 4 GB RAM running Debian. I'd like to evaluate the performance of the system with 2 GB physical RAM. Of course, I could remove on of the RAM modules. But, is there also a way to disable the physical memory by software? At boot time specify the mem=VALUE parameter to the linux kernel. This is easily done with grub at the grub boot screen by adding the parameter to the end of the existing boot options. /boot/vmlinuz-2.6.18-4-686 root=/dev/hda5 ro mem=2G Bob -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Disable RAM
Hi, I want to test how a program would run with a reduced physical memory. The machine has currently 4 GB RAM running Debian. I'd like to evaluate the performance of the system with 2 GB physical RAM. Of course, I could remove on of the RAM modules. But, is there also a way to disable the physical memory by software? Regards, Tim -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: Disable RAM
I want to test how a program would run with a reduced physical memory. The machine has currently 4 GB RAM running Debian. I'd like to evaluate the performance of the system with 2 GB physical RAM. Of course, I could remove on of the RAM modules. But, is there also a way to disable the physical memory by software? At boot time specify the mem=VALUE parameter to the linux kernel. This is easily done with grub at the grub boot screen by adding the parameter to the end of the existing boot options. /boot/vmlinuz-2.6.18-4-686 root=/dev/hda5 ro mem=2G Or without rebooting, or should be able to eat up 2GB or RAM by writing a little program (run as root, obviously) which allocates 2GB and locks those pages in RAM (a feature typically used to satisfy real-time contraints or to ensure a piece of sensitive information is never written to disk). Try man mlock. Stefan -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
