SC13 Denver, CO

The International Conference for High Performance Computing, Networking, Storage and Analysis

local_malloc(): malloc() for OpenCL __local memory.

Student: John Kloosterman (Calvin College)
Supervisor: Joel Adams (Calvin College)

Abstract: 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.

Poster: pdf
Two-page extended abstract: pdf

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