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Thursday, May 22 • 10:30am - 11:20am
How NUMA Balancing Moves KVM Guests - Takuya Yoshikawa, NTT OSSC

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NUMA Balancing is a feature we can find in recent Linux kernels, since the 3.8 kernel, which automatically moves tasks and their memory so that each task can use as much memory from the same NUMA node as possible. Since using more local memory results in better performance on NUMA systems, we can expect applications to perform better even without manually pinning and binding their threads.

In this presentation, the speakers will show some test results about how NUMA balancing behaves on a KVM host whose guests should get the best performance when they run within one NUMA node. In addition, they will discuss what is missing to fully replace the current way to pin and bind KVM guests, using libvirt for example, with this automatic balancing by the kernel.


Takuya Yoshikawa

Software Engineer, NTT OSSC
Takuya Yoshikawa is a software engineer at NTT OSSC. As a Linux developer, he has made some contributions to KVM for some years to improve and stabilize the virtualization technology of Linux. He also presented some of them at past conferences including KVM Forum and LinuxCon Japan. He is now interested in other areas than virtualization too and looking into recent Linux kernel changes with his co-workers to see whether the improvements announced... Read More →

Thursday May 22, 2014 10:30am - 11:20am

Attendees (8)