dummynet lag

2007-08-31 Thread deeptech71
Is it normal to have +10msec ping times when pinging through dummynet (ipfw 
pipes)? If yes, why? If not, WTF?

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Re: dummynet lag

2007-08-31 Thread Wojciech Puchar

Is it normal to have +10msec ping times when pinging through dummynet (ipfw


depends how exactly it's configured


pipes)? If yes, why? If not, WTF?
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Re: dummynet lag

2007-08-31 Thread Chuck Swiger

On Aug 31, 2007, at 6:34 AM, [EMAIL PROTECTED] wrote:
Is it normal to have +10msec ping times when pinging through  
dummynet (ipfw pipes)? If yes, why? If not, WTF?


If your HZ is 100, then, yes, it's common for the packets to be  
delayed by 10+ msec.  Set HZ to 1000 or higher and you'll have the  
latency drop to circa 1 ms.


--
-Chuck



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