Messages in this thread | | | Subject | Re: Plumbers: Tweaking scheduler policy micro-conf RFP | From | Peter Zijlstra <> | Date | Tue, 15 May 2012 22:33:46 +0200 |
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On Tue, 2012-05-15 at 16:26 -0400, valdis.kletnieks@vt.edu wrote: > On Tue, 15 May 2012 14:35:53 +0300, Pantelis Antoniou said: > > > Thermal management: How to distribute load to the processors in such > > a way that the temperature of the die doesn't increase too much that > > we have to either go to a lower OPP or shut down the core all-together. > > This is in direct conflict with throughput since we'd have better performance > > if we could keep the same warmed-up cpu going. > > It's not just "temperature of the die". When you have multiple aisles of 42U > racks full of servers, you often hit "must keep average total BTU load per > server below X" constraints. There's plenty of colo's that are only using 40% > of their floor space due to cooling constraints (you may be able to get the > power company to pull another megawatt of copper into the building, but then > you need to find someplace to put another megawatt worth of cooling).
Yeah, I know.. sadly ACPI-4+ is a complete and utter trainwreck. But in case someone wants to fix this proper I'm willing to talk.
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