Speaker
Dr
Peter Elmer
(PRINCETON UNIVERSITY)
Description
CMS is a large, general-purpose experiment at the Large Hadron Collider
(LHC) at CERN. For its simulation, triggering, data reconstruction and
analysis needs, CMS collaborators have developed many millions of lines of C++
code, which are used to create applications run in computer centers around
the world. Maximizing the performance and efficiency of the software is highly
desirable in order to maximize the physics results obtained from the available
computing resources.
In the past the code optimization effort in CMS has focused on improving
algorithms, basic C++ issues, excessive dynamic memory use and memory
footprint. Optimizing software today, on modern multi-/many-core 64bit CPU's
and their memory architectures, requires however a more sophisticated
approach. This presentation will summarize efforts in CMS to understand
how to properly optimize our software for maximum performance on modern
hardware. Experience with various tools, lessons learned and concrete
results achieved will be described.
Author
Dr
Peter Elmer
(PRINCETON UNIVERSITY)
