Re: [ns] 12ms

[Lloyd Wood <l.wood@eim.surrey.ac.uk>]

On Wed, 2 Aug 2000, Apu Kapadia wrote:

> I haven't been getting responses to this problem, and I believe this is
> important. 
> 
> 12ms seems to be an important time interval in NS. Whenever I try to run
> simulations with a granularity of under 12ms (for example, timers that
> trigger event every x microseconds), I get segmentation faults. Also, I
> noticed that when TCP sent data as fast as possible, the time between two
> sends was 12ms. 
> 
> Is this an NS quirk?

Please post an example script and describe your platform.

Here's the ns satellite code executing events every tenth of a
millisecond using $cbr0 set interval_ 0.0001:

+ 522.0030 66 26 cbr 210 ------- 0 66.0 67.0 0 0 37.90 -122.30 17.87
-120.14
- 522.0030 66 26 cbr 210 ------- 0 66.0 67.0 0 0 37.90 -122.30 17.87
-120.14
+ 522.0031 66 26 cbr 210 ------- 0 66.0 67.0 1 1 37.90 -122.30 17.87
-120.14
- 522.0032 66 26 cbr 210 ------- 0 66.0 67.0 1 1 37.90 -122.30 17.87
-120.14

L.

<L.Wood@surrey.ac.uk>PGP<http://www.ee.surrey.ac.uk/Personal/L.Wood/>