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SCHEDULE: NOV 16-21, 2014
When viewing the Technical Program schedule, on the far righthand side is a column labeled "PLANNER." Use this planner to build your own schedule. Once you select an event and want to add it to your personal schedule, just click on the calendar icon of your choice (outlook calendar, ical calendar or google calendar) and that event will be stored there. As you select events in this manner, you will have your own schedule to guide you through the week.
Performance Grading of GPU-Based Implementation of Space Computing Systems Image Compression
SESSION: Poster Reception
EVENT TYPE: Posters
TIME: 5:15PM - 7:00PM
AUTHOR(S):Olympia Kremmyda, Vasilis Dimitsas, Dimitris Gizopoulos
ROOM:New Orleans Theater Lobby
ABSTRACT:
Modern GPUs can accelerate the execution of inherently data-parallel applications. However, real-world algorithm realizations on GPUs differ from synthetic benchmarks. In this paper we stress the performance limits of GPUs. We measure the performance of our CUDA implementation of a recommended image compression algorithm (CCSDS-122.0-B-1) for space data systems on NVIDIA GPUs for various image sizes and compare it to the execution on x86 CPUs. The control-intensive parts and irregular memory access patterns under-utilize the GPU architecture and effectively serialize large parts of the GPU kernel execution.
We present the execution results on two systems with different CPU/GPU setups. In both systems, our GPU implementation of the algorithm eventually leads to a very moderate 1.1x to 2.1x speedup. Discussion of the performance bottlenecks leads to insights on how GPU execution can be improved in the future by either revising the algorithms or by supporting control-intensive execution on the GPU cores.
Chair/Author Details:
Olympia Kremmyda - National and Kapodistrian University of Athens
Vasilis Dimitsas - National and Kapodistrian University of Athens
Dimitris Gizopoulos - National and Kapodistrian University of Athens
Click here to download .ics calendar file
