I am trying to speed up some computations using the parallel toolbox - particularly replacing a far loop with a parfor loop. I have made each iteration of the loop independent and debugged it using a normal for instead of parlor. There are 8 captured signal buffers. I want to find the time of arrival of a given signal in each buffer. The loop is 8 long - one for each buffer.
I first using a correlation procedure find the coarse TOA in a buffer and then using a different algorithm find the fine TOA and fill in the fields of a structure with the data. The results is an 8 dimensional structure array (already memory allocated). I have verbose debugging print out in the loop. When I run it with for - is is fine. When I run it with parfor it will do 3 and blow up one time and 6 and blow up the next time. The error is thrown during parfor gives me no clue to where the true error was. I put a try/catch around the contents of the loop but that did work either.
The specific error is "Subscripted assignment between dissimilar structures.
"Error in calc_SRS_pseudo_ranges_Ver_P (line 96) parfor n=1:num_int;"
Line 96 is the start of the parfor statement so this tells me nothing. Two questions - why will it work for some number properly and they blow up and any idea on how I better hone in on the actual line of code that is causing this?
Any help or suggestions will be appreciated.
Thank You Truman Prevatt
