How to make Linux run fast again on Intel CPUs

Re:How to make Linux run fast again on Intel CPUs by bonzini on Sunday October 13, 2019 @01:45PM (#21241651)

KVM maintainer here. Virtualization still has slightly better overhead on Intel for several workloads. Even with all mitigations enabled (they hardly affect AMD times), AMD is sitting at about 3000 clock cycles vs 2000 for Intel.

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Re:How to make Linux run fast again on Intel CPUs by sascha_sl on Sunday October 13, 2019 @01:46PM (#21241664)

I've never heard about this, genuinely curious what workloads those are.

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Re:How to make Linux run fast again on Intel CPUs by bonzini on Sunday October 13, 2019 @02:40PM (#21242020)

Anything that causes the guest to go to sleep (HLT) a lot, for example message passing between two processes on two different VMs. You can try TCP_RR from netperf.

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