Thanks, Mike & Jan.
I’m running on bare metal HP Gen9 blade. I have started looking at the BIOS
settings and as far as I can tell there are a lot of options that affect CPU
frequency and they are turned on.
I will check tomorrow if ‘Spread Spectrum’ is available and is turned on as I
don’t
Hello,
> I assume that yours is a Class A device
I think this particular hardware model is shipped as either A or B. In this
case it is probably class A.
> Whereas these options do modulate the clock frequency, they do so with
> the knowledge of the operating system. The OS is therefore
> Le 16 sept. 2018 à 16:34, Jan Ceuleers a écrit :
>
> On 16/09/18 14:15, Sean Austin Critica wrote:
>>
>>
>> Can I directly observe these sources and see which ones are stable
>> (maybe by dumping them periodically, remotely from a machine with a
>> known stable clock)? The OS in this case
> Le 16 sept. 2018 à 16:34, Jan Ceuleers a écrit :
>
> "
People have only as much liberty as they have the intelligence to want and the
courage to take.
Emma Goldman
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On 16/09/18 14:15, Sean Austin Critica wrote:
>
>
> Can I directly observe these sources and see which ones are stable
> (maybe by dumping them periodically, remotely from a machine with a
> known stable clock)? The OS in this case is RedHat EL 7.
>
>
>
"Directly observe": no. But you can
On 16/09/18 13:24, Sean Austin Critica wrote:
>
>
> I’m running on bare metal HP Gen9 blade. I have started looking at the
> BIOS settings and as far as I can tell there are a lot of options that
> affect CPU frequency and they are turned on.
>
>
>
> I will check tomorrow if ‘Spread Spectrum’
On 15/09/18 22:55, Mike Cook wrote:
> Maybe your server is frequency shifting . Check your BIOS settings .
Sean: plug "bios spread spectrum" into your favourite search engine for
more info.
You want to disable that for accurate timekeeping.
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