1. ALF Amdhal’s Law is Forever
In PetaQCD

2. New technological context
Where we come from ?
CAPS ( )
Architecture and compilation for high-end processors (GP and embedded/special purpose)
Four successive positive evaluations
Caps Entreprise start-up created in 2003
New technological context
the multicore era

3. The ALF group A. Seznec, DR INRIA, microarchitecture
P. Michaud, CR INRIA, microarchitecture
I. Puaut, Pr Univ. Rennes I, worst case execution time
F. Bodin, after sabbatical (exp. 2010), compilation
E. Rohou, INRIA specialist engineer, compilation
+ 4 Ph.D students
+ 4 engineers

4. The advent of the multicore era
Up to 2002, throwing transistors in uniprocessor was the most cost-effective path for « performance for the masses »
Since 2002, progressively entering the multicore era
is it « parallelism for the masses » ?
Hardware: yes
Applications: no

5. Context
Hardware: 1000’s processors on a chip in will be feasible.
E.g. the 80-cores Intel Terascale prototype in 2006
Effective high performance on the chip is the issue
Applications: every application will have to run on // hardware
Architecture: defining the 2020’s manycore architecture
Compilation: code generation/adaptation for manycores
Performance predictability: predicting/guaranteeing performance on manycores A L F

6. Objectives within PetaQCD
Understand issues on a Petaflops range applications
Modelize future multi manycores particularly memory hierarchy to:
explore dimensionning:
Cores vs local memory/cache sizes
Computing power vs bandwidth at all levels
People: A. Seznec + PhD to be hired