Messages in this thread | | | Date | Tue, 2 Jan 2018 12:28:59 -0800 | From | Andres Freund <> | Subject | Re: Linux 4.15-rc6 |
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On 2017-12-31 14:57:51 -0800, Linus Torvalds wrote: > With all the x86 pti work coming in late in the rc like this, I'm by > now almost guaranteed to do an rc8 this release, not because there are > any known problems, but simply because of the timing of the patches. > > Go forth and test,
I thought it'd be interesting to run a short benchmark to be able to estimate the impact of the PTI work on postgres workloads (which I work on). On my skylake laptop, a memory resident, OLTP workload with 16 connections results in:
pti=on: tps = 220791.228297 (including connections establishing) tps = 220836.842052 (excluding connections establishing)
pti=off: tps = 236629.778328 (including connections establishing) tps = 236646.598274 (excluding connections establishing)
model name : Intel(R) Core(TM) i7-6820HQ CPU @ 2.70GHz
This isn't a complaint, I just thought it might be useful information. If it helps for anything/anybody, I'm happy to run additional benchmarks / provide additional information.
- Andres
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