Messages in this thread | | | Date | Fri, 8 May 2009 10:31:25 +0100 | From | Alan Cox <> | Subject | Re: [PATCH] x86: Reduce the default HZ value |
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> > As a side note Red Hat ships runtime configurable tick behaviour in RHEL > > these days. HZ is fixed but the ticks can be bunched up. That was done as > > a quick fix to keep stuff portable but its a lot more sensible than > > randomly messing with the HZ value and its not much code either. > > > Hi Alan, > > I guess you are talking about the tick_divider patch ? > And that's still same as reducing the HZ value only that it can be done > dynamically (boot time), right ?
Yes - which has the advantage that you can select different behaviours rather than distributions having to build with HZ=1000 either for compatibility or responsiveness can still allow users to drop to a lower HZ value if doing stuff like HPC.
Basically it removes the need to argue about it at build time and lets the user decide.
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