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DOE OSTI · 1632546

Monitor support on accelerated processing device

Dutu, Alexandru·Beckmann, Bradford M.
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Abstract

A technique for implementing synchronization monitors on an accelerated processing device (“APD”) is provided. Work on an APD includes workgroups that include one or more wavefronts. All wavefronts of a workgroup execute on a single compute unit. A monitor is a synchronization construct that allows workgroups to stall until a particular condition is met. Responsive to all wavefronts of a workgroup executing a wait instruction, the monitor coordinator records the workgroup in an “entry queue.” The workgroup begins saving its state to a general APD memory and, when such saving is complete, the monitor coordinator moves the workgroup to a “condition queue.” When the condition specified by the wait instruction is met, the monitor coordinator moves the workgroup to a “ready queue,” and, when sufficient resources are available on a compute unit, the APD schedules the ready workgroup for execution on a compute unit.

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BibTeXRIS

Dutu, Alexandru, Beckmann, Bradford M.. 2020-02-11. Monitor support on accelerated processing device. https://www.osti.gov/biblio/1632546

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