将一个线程绑定到特定 CPU上
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As multi-core CPUs become increasingly popular on server-grade hardware as well as end-user desktop PCs or laptops, there have been growing efforts in the community (e.g., in terms of programming models, compiler or operating system support) towards developing applications optimized for multi-core architecture.
One operating system (OS) support often exploited to run performance-critical applications on multi-core processors is so-called "processor affinity" or "CPU pinning". This is an OS-specific feature that "binds" a running process or program to particular CPU core(s).
Binding a program to specific CPU cores can be beneficial in several scenarios. For example, when an application with highly cache-bound workload runs together with other CPU-intensive jobs, pinning the application to a specific CPU would reduce CPU cache misses. Also, when two processes communicate via shared memory intensively, scheduling both processes on the cores in the same NUMA domain would speed up their performance.
In this tutorial, I will describe how to run a program or process on specific CPU cores on Linux.
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