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https://unix.stackexchange.com/questions/172449/vmxnet3-multiqueue-support-in-vmware-workstation?rq=1
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https://www.thomas-krenn.com/en/wiki/Linux_Multi-Queue_Block_IO_Queueing_Mechanism_(blk-mq)
Apr 09, 2015 · blk-mq (Multi-Queue Block IO Queueing Mechanism) is a new framework for the Linux block layer that was introduced with Linux Kernel 3.13, and which has become feature-complete with Kernel 3.16.[1] Blk-mq allows for over 15 million IOPS with high-performance flash devices (e.g. PCIe SSDs) on 8-socket servers, though even single and dual socket servers also benefit considerably …Author: Thomas-Krenn.AG
https://unix.stackexchange.com/questions/172449/vmxnet3-multiqueue-support-in-vmware-workstation
The VMXNET3 device always supported multiple queues, but the Linux driver used one Rx and one Tx queue previously. For the VMXNET3 driver shipped with VMware Tools, multiqueue support was introduced in vSphere 5.0.
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/virtualization_tuning_and_optimization_guide/sect-virtualization_tuning_optimization_guide-blockio-techniques
Multi-queue virtio-scsi provides improved storage performance and scalability in the virtio-scsi driver. It enables each virtual CPU to have a separate queue and interrupt to use without affecting other vCPUs.
http://lse.sourceforge.net/scheduling/mq1.html
In the multi-queue scheduler, we only obtain the run-queue lock of the current CPU specific run-queue. This means that it is only safe to scan the entries of the current CPU specific run-queue. A new routine local_goodness() is used instead of goodness() when scanning CPU specific run-queues.
https://stackoverflow.com/questions/10565468/using-multi-queue-nics-in-linux
Alternative to RPS/RFS is to use hardware support for multi queue. Then split a set of million of sockets into worker threads, each one using epoll() to manage events on its own socket pool. Ideally, we want one thread per RX/TX queue/cpu, but we have no way to know after accept() or connect() on which queue/cpu a socket is managed.
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