On Sat, Dec 6, 2008 at 3:40 PM, Rick Jones <[EMAIL PROTECTED]> wrote:
> Jeremy Leibs <[EMAIL PROTECTED]> wrote:
> > Is there possibly a way of configuring the maximum acceptable
> > latency of a packet? That is, as long as you know that for some
> > fraction of the day (when the system is not und
[EMAIL PROTECTED] (Hal Murray) writes:
>>Obviously using something like the number of cpu cycles is the wrong thing
>>to use for a clock if the computer is to act as a good clock. HPET should
>>solve that if only they got it set up properly.
>What's wrong with using the CPU clock as a clock? Why
[EMAIL PROTECTED] (Hal Murray) writes:
>>I expect the delay over the wireless link is symmetric, but it is entirely
>>plausible that it is not. Are there any good utilities for analyzing the
>>directional delays of the network? Or would the existence of such a tool
>>get rid of some of the prob
>Obviously using something like the number of cpu cycles is the wrong thing
>to use for a clock if the computer is to act as a good clock. HPET should
>solve that if only they got it set up properly.
What's wrong with using the CPU clock as a clock? Why is HPET any better?
I know of a couple of
>I expect the delay over the wireless link is symmetric, but it is entirely
>plausible that it is not. Are there any good utilities for analyzing the
>directional delays of the network? Or would the existence of such a tool
>get rid of some of the problems in and of itself.
The best way to meas
>Is there possibly a way of configuring the maximum acceptable latency of a
>packet? That is, as long as you know that for some fraction of the day
>(when the system is not under load) your latency is going to be less than
>some threshold, say, 2 ms, configuring the system to just throw away all
"Maarten Wiltink" <[EMAIL PROTECTED]> writes:
>"Unruh" <[EMAIL PROTECTED]> wrote in message
>news:[EMAIL PROTECTED]
>[...]
>>> What should I be doing to get 20 us? Buy all new computers with
>>> gigabit Ethernet?
>>
>> I suspect buying better switches. And it looks to me like you should
>> definit
> From: Terje Mathisen <[EMAIL PROTECTED]>
> Date: Sun, 07 Dec 2008 11:44:18 +0100
> Sender: [EMAIL PROTECTED]
>
>
> Maarten Wiltink wrote:
> > "Unruh" <[EMAIL PROTECTED]> wrote in message
> > news:[EMAIL PROTECTED]
> > [...]
> >>> What should I be doing to get 20 us? Buy all new computers with
>
Maarten Wiltink wrote:
> "Unruh" <[EMAIL PROTECTED]> wrote in message
> news:[EMAIL PROTECTED]
> [...]
>>> What should I be doing to get 20 us? Buy all new computers with
>>> gigabit Ethernet?
>> I suspect buying better switches. And it looks to me like you should
>> definitely NOT go to gigabit Et
"Unruh" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
[...]
>> What should I be doing to get 20 us? Buy all new computers with
>> gigabit Ethernet?
>
> I suspect buying better switches. And it looks to me like you should
> definitely NOT go to gigabit Ethernet if you want good timing.
>OK, strange. YOu can look at www.theory.physics.ubc.ca/chrony.html to see
>the delays on my network-- it is local to a university building, but all
>over the building. And I see essentially no difference between computers on
>one side or the other. The delays on the 100Mbs parts of the network are
11 matches
Mail list logo
