I have recently come across the Linux version of superpi. SuperPi is a popular program among the hardware and overclocking communities and is used to test the performance and stability of computers. It calculates the value of pi up to specified number of digits after the decimal point and displays your computers performance. You can get a copy from here
Once you've downloaded it just unpack and use the following command to run it.
Here's a screenshot of my results.
Try it for yourself and post your results in the comments.