Messages in this thread | | | Subject | Re: [PATCH v3 0/9] Parallel CPU bringup for x86_64 | From | Tom Lendacky <> | Date | Thu, 16 Dec 2021 10:27:40 -0600 |
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On 12/15/21 8:56 AM, David Woodhouse wrote: > Doing the INIT/SIPI/SIPI in parallel for all APs and *then* waiting for > them shaves about 80% off the AP bringup time on a 96-thread socket > Skylake box (EC2 c5.metal) — from about 500ms to 100ms. > > There are more wins to be had with further parallelisation, but this is > the simple part.
I applied this series and began booting a regular non-SEV guest and hit a failure at 39 vCPUs. No panic or warning, just a reset and OVMF was executing again. I'll try to debug what's going, but not sure how quickly I'll arrive at anything.
Thanks, Tom
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