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Created by Bugzilla Migration User@bugzilla-migration

OpenCL applications freeze the desktop

Submitted by Artem S. Tashkinov

Assigned to Zhigang Gong @gongzg

Link to original bug (#98702)

Description

Hardware: laptop with Intel Core i5 6200U CPU Software: Fedora 24 64 + all updates + kernel 4.8.6

Whenever I run any OpenCL applications my entire desktop almost completely freezes: the mouse cursor barely moves, I cannot type anything, there's a huge delay whenever I try to interact with anything. In short the desktop becomes unusable.

This happens for instance when running:

$ clpeak --all-tests

for most tests CPU usage remains negligible.

I have verified the issue with both Intel proprietary OpenCL drivers ( Intel intel-opencl-r3.0 (SRB3) Linux driver package ) and Beignet open source drivers.