Advanced Micro Devices Corporation

Ati Technologies Ulc

Sidney D Fortes

Anthony Asaro

Yinan Jiang

Ahmed M Abdelkhalek

Andy Sung

Xiaowei Wang

A technique for recovering from a hang in a virtualized accelerated processing device ('APD') is provided. In the virtualization scheme, different virtual machines are assigned different 'time-slices' in which to use the APD. When a time-slice expires, the APD stops operations for a current VM and starts operations for another VM. To stop operations on the APD, a virtualization scheduler sends a request to idle the APD. The APD responds by completing work and idling. If one or more portions of the APD do not complete this idling process before a timeout expires, then a hang occurs. In response to the hang, the virtualization scheduler informs the hypervisor that a hang has occurred. The hypervisor performs a function level reset on the APD and informs the VM that the hang has occurred. The VM responds by stopping command issue to the APD and re-initializing the APD for the function.

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Orlando, FL, United States of America

Sidney D Fortes