Yes, NUMA effects will really kill you, though how much depends on the particular quad-proc topology. I have some measurments for the interested in a small work

Yes, NUMA effects will really kill you, though how much depends on the particular quad-proc topology. I have some measurments for the interested in a small workshop paper I put together (I gathered the numbers in the context of tuning our garbage collector anyway): http://dl.dropbox.com/u/1620890/website/writings/mspc12-stream.pdf http://dl.dropbox.com/u/1620890/website/writings/mspc12-stre...