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Letting sleeping processors lieLetting sleeping processors liePosted Oct 18, 2003 21:08 UTC (Sat) by giraffedata (subscriber, #1954)In reply to: Letting sleeping processors lie by brouhaha Parent article: Letting sleeping processors lie
Well, for one thing the patch described there is for IBM Z processors (aka S/360, S/370, S/390, et al) only. It exploits the fact that the Z has a full precision, fully accurate real time clock integrated into the CPU. Most systems on which Linux runs do not have that. They have a decrepit ISA clock that will tell you the curent time within a second, and gain or lose a few seconds a week. And it takes I/O to query it.
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