Hello...
Read this:
About reachability analysis of a Petri net..
As you have noticed in my Petri nets tutorial example (read below),
i am analysing the liveness of the Petri net, because there is a rule
that says:
"If a Petri net is live, that means that it is deadlock-free."
Because reachability analysis of a Petri net with Tina
gives you the necessary information about boundedness and liveness
of the Petri net. So if it gives you that the Petri net is "live" , so
there is no deadlock in it.
Read more:
Tina and Partial order reduction techniques..
With the advancement of computer technology, highly concurrent systems
are being developed. The verification of such systems is a challenging
task, as their state space grows exponentially with the number of
processes. Partial order reduction is an effective technique to address
this problem. It relies on the observation that the effect of executing transitions concurrently is often independent of their ordering.
Tina is using “partial-order” reduction techniques aimed at preventing combinatorial explosion, Read more here to notice it:
http://projects.laas.fr/tina/papers/qest06.pdf
About modelizations and detection of race conditions and deadlocks in
parallel programming..
I have just taken further a look at the following project in Delphi
called DelphiConcurrent by an engineer called Moualek Adlene from France:
https://github.com/moualek-adlene/DelphiConcurrent/blob/master/DelphiConcurrent.pas
And i have just taken a look at the following webpage of Dr Dobb's journal:
Detecting Deadlocks in C++ Using a Locks Monitor
https://www.drdobbs.com/detecting-deadlocks-in-c-using-a-locks-m/184416644
And i think that both of them are using technics that are not as good
as analysing deadlocks with Petri Nets in parallel applications ,
for example the above two methods are only addressing locks or mutexes
or reader-writer locks , but they are not addressing semaphores
or event objects and such other synchronization objects, so they
are not good, this is why i have written a tutorial that shows my
methodology of analysing and detecting deadlocks in parallel
applications with Petri Nets, my methodology is more sophisticated
because it is a generalization and it modelizes with Petri Nets the
broader range of synchronization objects, and in my tutorial i will add
soon other synchronization objects, you have to look at it, here it is:
https://sites.google.com/site/scalable68/how-to-analyse-parallel-applications-with-petri-nets
You have to get the powerful Tina software to run my Petri Net examples
inside my tutorial, here is the powerful Tina software:
http://projects.laas.fr/tina/
Also to detect race conditions in parallel programming you have to take
a look at the following new tutorial that uses the powerful Spin tool:
https://mirrors.edge.kernel.org/pub/linux/kernel/people/paulmck/perfbook/perfbook.html
This is how you will get much more professional at detecting deadlocks
and race conditions in parallel programming.
Thank you,
Amine Moulay Ramdane.
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