[Haskell-cafe] ANNOUNCE: Sun Microsystems and Haskell.org joint project on OpenSPARC

[Duncan Coutts]

On Sat, 2008-07-26 at 03:02 +0200, Mitar wrote:
> Hi!
> 
> > If we spend so long blocked on memory reads that we're only utilising
> > 50% of a core's time then there's lots of room for improvements if we
> > can fill in that wasted time by running another thread.
> 
> How can you see how much does your program wait because of L2 misses?
> I have been playing lately with dual Quad-Core Intel Xeon Mac Pros
> with 12 MB L2 cache per CPU and 1.6 GHz bus speed and it would be
> interesting to check this things there.

Take a look at the paper that Ben referred to

http://www.cl.cam.ac.uk/~am21/papers/msp02.ps.gz

They use hardware performance counters.

Duncan