How to make Linux run fast again on Intel CPUs

Re:How to make Linux run fast again on Intel CPUs by gameswithgo on Sunday October 13, 2019 @01:02PM (#21241408)

as of pretty recently epic is better by almost all metrics.

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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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Re:How to make Linux run fast again on Intel CPUs by sascha_sl on Sunday October 13, 2019 @01:46PM (#21241657)

In all, unless you use Optane. Which you might on database servers with large infrequently accessed datasets? Can't really think of many use cases where throwing in an NVMe drive isn't better.

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Re:How to make Linux run fast again on Intel CPUs by detail-oriented on Sunday October 13, 2019 @01:58PM (#21241748)

I'm currently pricing out a new home workstation build, not looking at intel parts.

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