[ntp:questions] Re: announce: PPSkit-2.1.2 for Linux 2.4.21

Terje Mathisen terje.mathisen at hda.hydro.com
Wed Sep 3 20:09:35 UTC 2003


Piotr Trojanek wrote:

> In article <m37k4qmhh9.fsf at pc5234.rz.uni-regensburg.de>, Ulrich Windl wrote:
> 
>>I would like to have any feedback regarding architectures other than
>>ia32/Pentium.  The download can be found on up-to-date Linux mirrors
>>in /pub/linux/daemons/ntp/PPS as PPSkit-2.1.2.tar.gz (or bz2). The
>>size is about 125kB.
> 
> 
> What are the reasons Linux use TSC for PPS timestamping, while
> FreeBSD-5.1-RELEASE use ACPI (by default)? -- I don't say ACPI is
> better, just asking.
> 

TSC is mostly useless on SMP machines unfortunatly, unless you can pin 
your process, including all PPS interrupt handlers, to a single CPU.

Terje

-- 
- <Terje.Mathisen at hda.hydro.com>
"almost all programming can be viewed as an exercise in caching"




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