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https://issues.apache.org/jira/browse/MESOS-5342?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15276502#comment-15276502
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Chris commented on MESOS-5342:
------------------------------
Fixed a small bug in the greedy submodular subset selection algorithm. The
"submodular cost" of selecting a core was being used in the knapsack budget
test (cores currently have an at-most-budget-cost of "1.0"). The correct cost
is now being used in the test. Patch was submitted to reviewboard.
> CPU pinning/binding support for CgroupsCpushareIsolatorProcess
> --------------------------------------------------------------
>
> Key: MESOS-5342
> URL: https://issues.apache.org/jira/browse/MESOS-5342
> Project: Mesos
> Issue Type: Improvement
> Components: cgroups, containerization
> Affects Versions: 0.28.1
> Reporter: Chris
>
> The cgroups isolator currently lacks support for binding (also called
> pinning) containers to a set of cores. The GNU/Linux kernel is known to make
> sub-optimal core assignments for processes and threads. Poor assignments
> impact program performance, specifically in terms of cache locality.
> Applications requiring GPU resources can benefit from this feature by getting
> access to cores closest to the GPU hardware, which reduces cpu-gpu copy
> latency.
> Most cluster management systems from the HPC community (SLURM) provide both
> cgroup isolation and cpu binding. This feature would provide similar
> capabilities. The current interest in supporting Intel's Cache Allocation
> Technology, and the advent of Intel's Knights-series processors, will require
> making choices about where container's are going to run on the mesos-agent's
> processor(s) cores - this feature is a step toward developing a robust
> solution.
> The improvement in this JIRA ticket will handle hardware topology detection,
> track container-to-core utilization in a histogram, and use a mathematical
> optimization technique to select cores for container assignment based on
> latency and the container-to-core utilization histogram.
> For GPU tasks, the improvement will prioritize selection of cores based on
> latency between the GPU and cores in an effort to minimize copy latency.
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