Re: [OMPI users] exploitation of vampirTrace generated otf files.

Mon, 19 Dec 2011 09:09:05 -0500 

Hello

I think it's solved.
It's indeed the number of tick, and i found the information with the otfinfo command, wich give me the line : 
time resolution | 2.27 Ghz

This value allow us to convert these tick values to seconds values.

THanks all.
Le 19/12/2011 14:32, Mathieu westphal a écrit :

Hello

I'm generating otf file by compiling my programm with mpicc-vt.

It works very well and i can visualize the trace with the free Vampir.

But i need to analyze the results with some mathematical tools.

with vampir , i cannot extract any usefull data.
So i try to use otfdump to extract the data. It works well to, i get lots of output like this : 

(#12251)     6227944291 Leave: function 0, process 1, source 0
(#12252)     6228010545 Enter: function 136, process 1, source 0
(#12253) 6228010545 SendMessage: sender 1, receiver 3, group 1000000000, type 0, length 2880, source 0 
(#12254)     6228012208 Leave: function 0, process 1, source 0
(#12255)     6228078341 Enter: function 126, process 1, source 0
(#12256) 6228727039 ReceiveMessage: receiver 1, sender 2, group 1000000000, type 0, length 4, source 0 
(#12257)     6228727039 Leave: function 0, process 1, source 0
(#12258)     6228727787 Enter: function 136, process 1, source 0
(#12259) 6228727787 SendMessage: sender 1, receiver 3, group 1000000000, type 0, length 2880, source 0 
(#12260)     6228729929 Leave: function 0, process 1, source 0
(#12261)     6228794962 Enter: function 136, process 1, source 0
(#12262) 6228794962 SendMessage: sender 1, receiver 3, group 1000000000, type 0, length 2880, source 0 
(#12263)     6228796965 Leave: function 0, process 1, source 0
(#12264)     6228862900 Enter: function 136, process 1, source 0
(#12265) 6228862900 SendMessage: sender 1, receiver 3, group 1000000000, type 0, length 2880, source 0 
(#12266)     6228864609 Leave: function 0, process 1, source 0
(#12267)     6228931011 Enter: function 136, process 1, source 0
(#12268) 6228931011 SendMessage: sender 1, receiver 3, group 1000000000, type 0, length 2880, source 0 
(#12269)     6228932640 Leave: function 0, process 1, source 0
(#12270)     6228999027 Enter: function 136, process 1, source 0
(#12271) 6228999027 SendMessage: sender 1, receiver 3, group 1000000000, type 0, length 2880, source 0 


What really interest me is in these lines :

(#12255)     6228078341 Enter: function 126, process 1, source 0
(#12256) 6228727039 ReceiveMessage: receiver 1, sender 2, group 1000000000, type 0, length 4, source 0 
(#12257)     6228727039 Leave: function 0, process 1, source 0
and it's the time delta between the call to mpiRecv ( ReceiveMessage) and the leave of mpiRecv, so in this case : 
6228727039 - 6228078341 = 648698
But, what the unit of this value? why it dont correspond to anything in Vampir? 

After some test i empirically admit that

otfdumptime / 2267,999980709 = vampirTime (in µs)

I can work from that, but if anyone has any clue about that....
My guess is about some weird processor ticking count, but how vampir can manage the conversion ? 

Thanks for help
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