[Click] How to test adaptive mode with 2 CPUs?

[Giovanni Tusa]

Hi Alessandro.

I'm an SMP click user too and, according to my knowledge, the element you
need to enable the adaptive CPU scheduling
in SMP Click is the SortedTaskSched element (that is, the element
implemented in the
sortedsched.hh and the sortedsched.cc files in
/CLICK_DIR/elements/linuxmodule).

For my experience, the SortedTaskSched element works in click-1.3pre1 with
the CVS
updates.

If you want to read a simple description of this element, you can follow the
link:
http://www.pdos.lcs.mit.edu/click/doc/SortedTaskSched.n.html.

I hope these information will be helpful for you.

Giovanni

----- Original Message -----
From: "Alessandro Coli" <alessandro.coli at studio.unibo.it>
To: <click at amsterdam.lcs.mit.edu>
Sent: Thursday, June 17, 2004 3:42 PM
Subject: [Click] How to test adaptive mode with 2 CPUs?


>
> Hi, i am the student who is making his thesis with Giorgio Calarco.
>
> We are using click 1.3 for reasons of compatibility with our previous
> experiments, so as we can compare the results of current tests with the
old
> ones'.
> Our router is a 2 processor PC.
>
> Giorgio Calarco told me that, differently from what we used to think, if
we
> only compile the click with "--enable-multithread=2" and
"--enable-adaptive"
> options and then run a test in adaptive mode, the test uses only 1 CPU.
This
> is not what we wanted to do, we want a test in adaptive using both the
CPUs.
>
> 1) Does this happen even if we launch click with "click-install --threads
2"
> option? I noticed that if i launch click with --threads 2 option, the
system
> monitor signals 100% occupation, while it signals just 50% if i launch
> with "click-install --threads 1" or just "click-install". So I thought
this
> was the proof that both the CPUs were being used.... was I wrong?
>
> Giorgio Calarco told me that I need to use another element
> called "SortedThreadSched" if i want to run a test in adaptive mode using
both
> the 2 CPUs. I cannot find any instruction on it, neither on the
documentation
> on click site, nor in the paper
> http://www.pdos.lcs.mit.edu/papers/click:usenix01/usenix01.pdf (but I know
it
> has not been written by Kohler).
>
> But I found in the directories of click1.3 an element called
"SortedSched". I
> did not find any documentation on it too.
>
> 2) Is it the same element ( SortedSched = SortedThreadSched) ?
> 3) Since there is no documentation: how do I have to use it to run the
> adaptive test with both the CPUs?
>
> This is a question for Kohler or for anyone who knows...
>
> Many thanks,ciao :)
>
> Alex
>
>
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