Raspberry Pi Stack Exchange is a question and answer site for users and developers of hardware and software for Raspberry Pi. It only takes a minute to sign up.
Sign up to join this community
It has been suggested to me that the L2 cache is turned off by default on the Pi, and that turning it on could improve CPU performance (probably at the expense of GPU performance). I'm keen to explore this. This is my questions:
If you are using recent version of Raspbian, it should already be enabled by default - as posted in the release notes here: http://www.raspberrypi.org/archives/1040
You can enable/disable L2 cache by using the disable_l2cache setting in /boot/config.txt. But before you rush there there's couple of things to consider:
It's not free performance boost - you will take the cache away from GPU - which probably needs it more, unless you're running headless system.
You need to get kernel that matches the L2 cache setting - this depends on your distro. Instructions on compiling your own kernels are at: http://elinux.org/RPi_Kernel_Compilation
There are more details on config.txt - the GPU configuration file at: http://elinux.org/RPi_config.txt
