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Friday, October 25 • 2:00pm - 2:50pm
Optimize DMA Configuration in Encryption Use Case - Guillene Ribiere, BayLibre SAS

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This presentation describes how hardware instrumentation IPs embedded into the OMAP4 interconnect were used in order to debug and improve the performance of the system DMA. This system DMA was involved into a data encryption pipeline which was under performing in comparison to theoretical expectations prior to this analysis. Usual tools were first used: Tracing, Systemtap. However in such a use case where several hardware accelerators are first configured and then used in the data path in a data pipe lining fashion, such tools could not help to pinpoint the exact performance gap. In order to get visibility into what was happening, hardware tools called OCP watchpoint were activated and used. They allowed to identify issues in the system DMA configuration and to quantify the latency budget among the different contributors.

Speakers
GR

Guillene Ribiere

BayLibre SAS
Guillène is now with a company called BayLibre.  Previously she was a senior systems engineer with 20 years of experience at Texas Insturments. Her last position was software architect for sensors for OMAP6 Android platforms with Texas Instruments. In this role, she was responsible for integrating a new processor, the sensor hub, into the OMAP software stack. This implied both porting the RTOS sysBios onto the sensor hub and... Read More →


Friday October 25, 2013 2:00pm - 2:50pm
Pentland

Attendees (14)