On Jun 9, 2010, at 4:36 PM, Dr. David Kirkby wrote:
I think this is such good news, that even those on sage-devel will
not mind too much! Building packages in parallel seems to be working
very well. That said, wtih 128 hardware threads, still only a small
fraction of 't2' is being used effectively. I've found with multi-
threaded coded, around 500 threads seems optimal on 't2' - certainly
a lot more than the number of cores (16) or hardware threads (128).
That's quite strange. Are the threads locking on disk I/O for most of
the compilation process?
Clint, the main ATLAS developer, sent an email the other day to
William in which he said the latest ATLAS would build in under an
hour on 't2', so hopefully 'ATLAS' wont be a bottleneck for much
longer.
Now at least 't2' should build Sage quicker than the 10-year old
SPARC I bought from eBay for a US equivalent of under $50.
Excellent!
- Robert
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