New AMD EPYC-based Compute Engine family, now in beta

Re:New AMD EPYC-based Compute Engine family, now in beta by dilyevsky on Tuesday February 18, 2020 @12:48PM (#22358147)

Is that with spectre/meltdown/etc protection on?

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Re:New AMD EPYC-based Compute Engine family, now in beta by imajoo on Tuesday February 18, 2020 @03:56PM (#22360327)

AWS patched their hosts back in 2018 which caused a huge shitstorm in terms of performance lost across various workloads..so yes.

https://blog.appoptics.com/visualizing-meltdown-aws/

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Re:New AMD EPYC-based Compute Engine family, now in beta by dilyevsky on Tuesday February 18, 2020 @08:45PM (#22362376)

Afaik amd patches aren’t as penalizing as Intel ones. I have no idea if ^^^ refers to bare metal, bare metal w/ patches or cloud env (unlikely) hence the question.

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Re:New AMD EPYC-based Compute Engine family, now in beta by imajoo on Tuesday February 18, 2020 @08:52PM (#22362417)

The link above is specific to AWS -- hence, "Visualizing Meltdown on AWS" as their title.

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Re:New AMD EPYC-based Compute Engine family, now in beta by api on Tuesday February 18, 2020 @01:27PM (#22358674)

Don't know, but for pure numeric code these mitigations are not (AFAIK) that expensive. The main cost is incurred for any code that is syscall-heavy like I/O.

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Re:New AMD EPYC-based Compute Engine family, now in beta by dilyevsky on Tuesday February 18, 2020 @08:46PM (#22362383)

Pure numeric benches aren’t very useful irl tho. My hunch is with security patches single core will be very comparable

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Re:New AMD EPYC-based Compute Engine family, now in beta by blattimwind on Tuesday February 18, 2020 @01:02PM (#22358368)

These are VMs, the hosts have to run with these mitigations enabled.

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