https://community.intel.com/t5/OpenCL-for-CPU/Is-running-OpenCL-in-multiple-Docker-containers-problematic/m-p/1167091#M6441 <P>Hello</P><P>We have some issues running multiple instances of our CNN-pipeline in separated Docker containers. The Linux randomly enters a "Zombie" state (no reaction to anything, even to the "Magic SysRq keys" and so much network traffic that every device on the next switch is down). (see <A href="https://software.intel.com/en-us/forums/opencl/topic/804936">https://software.intel.com/en-us/forums/opencl/topic/804936).</A></P><P>As the problems started when updating the OpenCL driver and only occurred (until now) when multiple Docker containers with OpenCL were running, there might be a multiprocessing issue with the OpenCL driver when used within separated Docker containers (some tests running native (not in Docker containers) caused no problems, but this might just be a coincidence as the tests where only done for a few hours).</P><P>So our question is how multiprocessing is handled by the driver and if we need to add more than just the /dev/dri device to the Docker containers to avoid race conditions between the different docker containers.</P><P>Greetings,</P><P>Thomas</P> Mon, 11 Mar 2019 10:09:04 GMT Senfter__Thomas 2019-03-11T10:09:04Z https://community.intel.com/t5/OpenCL-for-CPU/Is-running-OpenCL-in-multiple-Docker-containers-problematic/m-p/1167091#M6441 <P>Hello</P><P>We have some issues running multiple instances of our CNN-pipeline in separated Docker containers. The Linux randomly enters a "Zombie" state (no reaction to anything, even to the "Magic SysRq keys" and so much network traffic that every device on the next switch is down). (see <A href="https://software.intel.com/en-us/forums/opencl/topic/804936">https://software.intel.com/en-us/forums/opencl/topic/804936).</A></P><P>As the problems started when updating the OpenCL driver and only occurred (until now) when multiple Docker containers with OpenCL were running, there might be a multiprocessing issue with the OpenCL driver when used within separated Docker containers (some tests running native (not in Docker containers) caused no problems, but this might just be a coincidence as the tests where only done for a few hours).</P><P>So our question is how multiprocessing is handled by the driver and if we need to add more than just the /dev/dri device to the Docker containers to avoid race conditions between the different docker containers.</P><P>Greetings,</P><P>Thomas</P> Mon, 11 Mar 2019 10:09:04 GMT https://community.intel.com/t5/OpenCL-for-CPU/Is-running-OpenCL-in-multiple-Docker-containers-problematic/m-p/1167091#M6441 Senfter__Thomas 2019-03-11T10:09:04Z