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List:       opensim-dev
Subject:    [Opensim-dev] Anyone testing out mono 2 previews?
From:       sdague () gmail ! com (Sean Dague)
Date:       2008-08-28 13:11:36
Message-ID: 48B6A408.2000405 () gmail ! com
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Mariusz Nowostawski wrote:
> Hi all,
> 
> 1.9.1 is slightly different than 2.0 pre1 and pre2, and these in turn 
> are slightly different to 2.1 which is the working version for the head 
> of mono SVN.  We've run tests on all of them, and I must say it is 
> getting better and better as the mono project walks along their 
> development path. In particular, the logging profiler became part of the 
> standard package, and profiling as such is much more stable than before. 
> Well, it still does not work most of the time with OpenSim.exe, although 
> the good news is that it hangs or crashes much later than before ;o) 
> We have had some successes getting other UGAI servers profiled. 2.1 
> seems to work a bit faster, and uses less memory, although GC is still a 
> bit of an issue (parallel marking and sweeping and incremental GC are 
> theoretically possible but still  problematic). We are tweaking the 
> compiling options and GC setup as to squeeze better performance out of 
> the system. Ahead of time compilation seems to help too, although for 
> exact quantitative numbers we need to put more work into it.  My gut 
> feeling is also that both 2.0pre and 2.1 are more stable (less OpenSim 
> seg faults observed).   Valgrind still hangs on most of the UGAI servers 
> (OpenSim.exe in particular) but we have been able to get some memory 
> leaks profiled - there are some - more work needs to be done to isolate 
> exactly what's causing it - and how this can be avoided by tweaking C# 
> code.

Are you able to trap and report those segfaults at all?  I keep getting
this suspicion that timers are a problem area as all my crashes of late
are on timer events off the dotnetengine.  But if someone is digging
into this a thoroughly as you are, you may be in a better position to
try and capture that.

	-Sean

-- 
Sean Dague / Neas Bade
sdague at gmail.com
http://dague.net


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