Yes, that's pretty much the situation. I'm mostly looking for someone who has satisfactory performance with their Core i7 so I can get some comparison information and figure out if I need to disable hyperthreading or compile atlas with different flags or what.
Are the Ubuntu 10.10 atlas packages actually different from the Ubuntu 10.04 atlas packages? Depending on how I install I can get different error messages. If I install the atlas packages in Ubuntu 10.04 I get slow performance relative to other Core i7 or even Core 2 Quad machines with lower clock rates that are available to me at work. If I compile my own atlas and try to build numpy with site.cfg I get one set of error messages that I've sent to the list before. If I compile my own atlas and try to build numpy with environment variables specifying the location of ATLAS, the environment variables get ignored and it is built without atlas. If I compile my own atlas and put symlinks to it in the default search places, I get numpy libraries that ldd shows as linking to atlas but still get slow peformance. On Mon, Nov 8, 2010 at 11:33 PM, David Warde-Farley <warde...@iro.umontreal.ca> wrote: > On 2010-11-08, at 8:52 PM, David wrote: > >> Please tell us what error you got - saying that something did not >> working is really not useful to help you. You need to say exactly what >> fails, and which steps you followed before that failure. > > I think what he means is that it's very slow, there's no discernable error > but dot-multiplies don't seem to be using BLAS. > > David > _______________________________________________ > NumPy-Discussion mailing list > NumPy-Discussion@scipy.org > http://mail.scipy.org/mailman/listinfo/numpy-discussion > _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
