9
Why ATLAS Is Fast?
¨ATLAS
does not implement a single fixed algorithm.
¨The
code is generated by a program that tests, probes, and runs 100’s of experiments on the target sw/hw architecture.
¨During
installation the program generator determines an
efficient implementation
ãmeasures the speed of different code strategies and chooses the best using an adaptive procedure.
¨This
leads to a new model of high performance programming
in which performance critical code is machine
generated using parameter optimization.