SC13 Home > SC13 Schedule > SC13 Presentation - local_malloc: malloc for OpenCL __local memory

SCHEDULE: NOV 16-22, 2013

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local_malloc: malloc for OpenCL __local memory

SESSION: ACM Student Research Competition Poster Reception

EVENT TYPE: ACM Student Research Competition Posters, ACM Student Research Competition

TIME: 5:15PM - 7:00PM

AUTHOR(S):John Kloosterman

ROOM:Mile High Pre-Function

One of the complexities of writing kernels in OpenCL is managing the scarce per-workgroup __local memory on a device. For instance, temporary blocks of __local memory are necessary to implement algorithms like non-destructive parallel reduction. However, all __local memory must be allocated at the beginning of a kernel, and programmers are responsible for tracking which buffers can be reused in a kernel. We propose and implement an extension to OpenCL that provides a malloc-like interface for allocating workgroup memory. This extension was implemented by using an extension to the Clang compiler to perform a source-to- source transformation on OpenCL C programs.

Chair/Author Details:

John Kloosterman - Calvin College

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