[javasim-general] Strange srtt problem

Fri, 24 May 2002 12:53:59 -0700

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Good question.  As you may have noticed, the plotter component is CPU
hog, especially when you display the result online.  To make it less CPU
intensive, the implementation does not redraw the plot every time it
receives data.  Instead, it redraws the plot randomly.  If you find the
plot does not draw something it is supposed to draw, you can click on
the plot to trigger an immediate redraw.

Let me know if this is not the cause of your problem.

Hung-ying 

-----Original Message-----
From: javasim-announce-admin@cs.uiuc.edu
[mailto:javasim-announce-admin@cs.uiuc.edu] On Behalf Of Trond Breivik
Sent: Friday, May 24, 2002 3:03 AM
To: javasim-announce@cs.uiuc.edu
Subject: [javasim-general] Strange srtt problem

Hi,

I have noticed that the plotter sometimes does not display the srtt.
Sometimes when I run a simulation with only one TCP source nothing is
displayed in the srtt graph. The srtt graph window pops up though and
displays the path to the TCP component. The throughput also shows that
the ACK packets are arriving at the source. If I then add one more TCP
source and lets it's srtt be displayed in the same plotter window, both
srtt graphs are displayed. 

Got any idea why this happens? Is there maybe an update interval for the
srtt that I could change? 

Trond Breivik

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face=3D"Courier New"><span =
style=3D'font-size:10.0pt;line-height:150%;font-family:
"Courier New";color:navy'>&nbsp;</span></font></p>

Good question.&nbsp; As you may have noticed, =
the plotter
component is CPU hog, especially when you display the result online. =
&nbsp;To
make it less CPU intensive, the implementation does not redraw the plot =
every
time it receives data.&nbsp; Instead, it redraws the plot =
randomly.&nbsp; If
you find the plot does not draw something it is supposed to draw, you =
can click
on the plot to trigger an immediate redraw.

<p class=3DMsoNormal style=3D'text-indent:0in'><font size=3D2 =
color=3Dnavy
face=3D"Courier New"><span =
style=3D'font-size:10.0pt;line-height:150%;font-family:
"Courier New";color:navy'>&nbsp;</span></font></p>

<p class=3DMsoNormal style=3D'text-indent:0in'><font size=3D2 =
color=3Dnavy
face=3D"Courier New"><span =
style=3D'font-size:10.0pt;line-height:150%;font-family:
"Courier New";color:navy'>Let me know if this is not the cause of your =
problem.</span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3D"Courier =
New"><span
style=3D'font-size:10.0pt;line-height:150%;font-family:"Courier =
New";color:navy'>&nbsp;</span></font></p>

<div>

<p class=3DMsoAutoSig><font size=3D3 color=3Dnavy face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt;color:navy'>Hung-ying </span></font></p>

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<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3D"Courier =
New"><span
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New";color:navy'>&nbsp;</span></font></p>

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0in 4.0pt'>

<p class=3DMsoNormal align=3Dleft style=3D'text-align:left'><font =
size=3D2 face=3DTahoma><span
style=3D'font-size:10.0pt;line-height:150%;font-family:Tahoma'>-----Origi=
nal
Message-----<br>
<b><span style=3D'font-weight:bold'>From:</span></b> =
javasim-announce-admin@cs.uiuc.edu
[mailto:javasim-announce-admin@cs.uiuc.edu] <b><span =
style=3D'font-weight:bold'>On
Behalf Of </span></b>Trond Breivik<br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> Friday, May 24, =
2002 3:03 AM<br>
<b><span style=3D'font-weight:bold'>To:</span></b> =
javasim-announce@cs.uiuc.edu<br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> =
[javasim-general] Strange
srtt problem</span></font></p>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt;line-height:150%'>&nbsp;</span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
line-height:150%;font-family:Arial'>Hi,</span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
line-height:150%;font-family:Arial'>&nbsp;</span></font></p>

I have =
noticed that
the plotter sometimes does not display the srtt. Sometimes when I run a =
simulation
with only one TCP source nothing is displayed in the srtt graph. The =
srtt graph
window pops up though and displays the path to the TCP component. The
throughput also shows that the ACK packets are arriving at the source. =
If I
then add one more TCP source and lets it&#8217;s srtt be displayed in =
the same
plotter window, both srtt graphs are displayed.

<p class=3DMsoNormal style=3D'text-indent:0in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;line-height:150%;font-family:Arial'>&nbsp;</spa=
n></font></p>

Got any =
idea why
this happens? Is there maybe an update interval for the srtt that I =
could
change?

<p class=3DMsoNormal style=3D'text-indent:0in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;line-height:150%;font-family:Arial'>&nbsp;</spa=
n></font></p>

<p class=3DMsoNormal style=3D'text-indent:0in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;line-height:150%;font-family:Arial'>Trond =
Breivik</span></font></p>

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