[ntp:questions] Recommendations for good NIC cards

Uwe Klein uwe_klein_habertwedt at t-online.de
Sat Apr 17 17:39:56 UTC 2010

unruh wrote:
> On 2010-04-15, Russell, David <David.Russell at dowjones.com> wrote:
>>I have seen several comments saying that the NIC card in an NTP client can make a difference in how well NTP will perform.
>>My servers are Dells running RedHat.
>>Does anyone have any recommendations for a particularly good NIC card for Gigabit speeds?  I am also interested in knowing if there are any known clunkers.
> I suspect GB cards are worse than 100MB cards in the latency department.
> I have had a number which produced much worse results for ntp ( some
> sort of store and hold in the cards).
> You certainly do not need GB speeds for ntp.

The core difference may well lie in multiple packets received per interrupt ( or not )
which is comfigurable ( on linux, bsd?, win* ????????????? )

As most other brand new problems it is a performance / (unpredictable) latency tradeoff:


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