[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [RFC]PLE's performance enhancement through improving scheduler.
The attached patch is just for RFC, not for check-in. Recently, we are working on enhancing the hardware feature PLE through improving scheduler in Xen, and the attached patch can improve system's throughput significantly. With standand virtualization benchmark(vConsolidate), the testing result shows ~20% performance gain. In the implemenation, there are two points to enhance the system's scheduler. The first one is that when PLE vmexit occurs, scheduler de-schedules the vcpu and put it in the second position of the runq instead of moving it to the tail of runq so that it can be re-scheduled in a very short time. In this case, it can improve scheduler's faireness and make the PLE-senstive guests allocated with reasonable timeslice. The other improvement is to boost other vcpus' priority of the same guest through moving them to the head of the runq when PLE vmexit happens with one vcpu of the guest. And we are also improving the implementation to make it more robust and more pervasive, but before the work is done, we also want to collect your guys' ideas and suggestions about it ? Any comment is very appreciated!. Thanks! Xiantao Attachment:
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