How To Get Performance From Commodity Processors?
Today’s processors can achieve high-performance, but this requires extensive machine-specific hand tuning.
Routines have a large design space w/many parameters
- blocking sizes, loop nesting permutations, loop unrolling depths, software pipelining strategies, register allocations, and instruction schedules.
- Complicated interactions with the increasingly sophisticated microarchitectures of new microprocessors.
A few months ago no tuned BLAS for Pentium for Linux.
Need for quick deployment of optimized routines.
ATLAS - Automatic Tuned Linear Algebra Software