[time-nuts] Linux TSC clocksource on multi-core systems

Michael Tharp gxti at partiallystapled.com
Sat Apr 26 18:02:02 EDT 2014


On 04/26/2014 02:27 PM, Laszlo Hanyecz wrote:
> It's fine to disable the additional cores/cpus on a dedicated NTP machine, but I wonder if there is a solution that allows both the TSC and all the cores to be used at the same time.  Is it even possible to completely sync the counters across CPUs (not just get close)?

You could try pinning ntpd to a single CPU using the "taskset" command. 
It wouldn't give all the applications the benefit of a perfectly 
synchronized clock, but if you just want ntpd to be happy then it ought 
to work as well as turning SMP off.




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