Re: [chrony-users] Re: Locking PPS refclock with NTP source

[Thibaut BEYLER <thibautbeyler@xxxxxxxxx>]

I tested some other BIOS settings and found out that the disabling APIC support improve a lot chrony perfomances :  PPS is good and i get much better performance with my ntp sources : better std dev and test C is not failing anymore ( like it did 90% of the time on some sources before with chrony 3)

However, it also disable SMP support, so it's not a great solution.. I'm currently trying to play with scheduling settings but so far no luck.

2017-09-07 15:32 GMT+02:00 Chris Perl <cperl@xxxxxxxxxxxxxx>:

On Thu, Sep 7, 2017 at 5:09 AM, Thibaut BEYLER <thibautbeyler@xxxxxxxxx> wrote:
> So i guess this is realted to some kind of cpu scheduling. However i

And, just to help rule out actual scheduler latency, you could run
chronyd with realtime priority (SCHED_FIFO or SCHED_RR) to make sure
it always has an absolute scheduling advantage over other processes
that aren't running with realtime priority.

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