Thanks a lot Sriram!. It really cut the execution time drastically from 2.8 minutes to 0 (negligibly small number of) seconds. Actually, I earlier avoided the God related statements, but it did not help more. After I commented floyd_warshall and neighbour related functions, it has reduced drastically.
regards, Mayur > this is sriram from iit kgp again > > in scenario gen ie setdest.cc you can delete unwanted portions which u may > not use and this shuld reduce scenario generation time. like for my > application i did not require functions like flloyd-warshall and the > neighbour functions , god functions etc. remove them and ur scenario file > generation shuld be faster. in the scenario file u basically require only > lines for initial postion and setdest (set destination) neighbour > reachable > etc are discovered by the routing protocol themselves > > > > -- > B Sriram > India > mob : 09733706981 > > Dear Mayur, > > Setdest has many nested for loops in which it is computing neighborhood of > nodes, You remove all those nested loops as well. The actual code for > generating random movement is not more that 50 lines. All other code is of > god only. Previously when I worked with it, I did this optimization and it > scalled well even for 1000 nodes(it generated the mobility scenario in > less > than 1 minute) > > I think this helps. > > regards, > Manish > > > > On Sat, Feb 28, 2009 at 2:25 PM, Mayur Mansukhlal Vegad > <ma...@ee.iitd.ac.in >> wrote: > >> I had already tried it by commenting the show_diffs() method call >> statement. But it didnot help. The only four statements printing God >> related stuff are those containing GOD_FORMAT and GOD_FORMAT2, which are >> inside the show_diffs() function. I commented that calling stmt. And the >> scenario file had no GOD stmts then. But still it takes similar amount >> of >> time. >> >> BTW thanks for your considerations! >> >> Mayur >> >> > If you look at the code, setdest is spending most of the time in >> > generating >> > god entries. so if you are not interested in them, you can comment out >> the >> > code which calculates and generates god entries which will reduce the >> > execution time significantly. >> > >> > regards, >> > Manish >> > >> > On Sat, Feb 28, 2009 at 1:06 AM, Mayur Mansukhlal Vegad >> > <ma...@ee.iitd.ac.in >> >> wrote: >> > >> >> >> >> Dear all, >> >> >> >> scenario generation takes around 2.5 to 3 minutes for large number >> (eg >> >> 100) of nodes. It is too much. After that the ns simulation takes >> >> another >> >> minute or more. >> >> >> >> Could anybody guide how to reduce the execution time particularly of >> the >> >> setdest tool? >> >> >> >> with regards, >> >> Mayur >> >> >> >> >> > >> >> >
