Was this with tossing the partial sums code into the optimised bangs
program? Weird. I wonder if profiling will help explain why? In any case, If
nobody comes up with any other tweaks, I'll probably submit the optimised
bangs version to the shootout this weekend.
--S
On Nov 30, 2007 1:30 PM, Richard Kelsall
Sterling Clover wrote:
I'm still curious if the pre-calculation of partial sums that I did works well across processors, as I don't see why it shouldn't. My less-strictified version of Don's code is attached, and below are the functions you'll need to insert/replace to make the partial-sums optimization work.
Hello Sterling, I've timed your new Fasta with optimised bangs - it's the fastest so far. But the pre-calculated partial-sums version seems to go a bit slower for some unknown reason.
Seconds Optimised bangs program 11.20 compiled ghc --make Optimised bangs program 10.73 compiled with -O -fglasgow-exts -optc-mfpmath=sse -optc-msse2 -optc-march=pentium4 Partial-sums program 11.97 compiled ghc --make Partial-sums program 11.14 compiled with -O -fglasgow-exts -optc-mfpmath=sse -optc-msse2 -optc-march=pentium4
This is on my GHC 6.6.1, W2K, Intel Core 2 Duo 2.33GHz machine - same as for the previous timings I gave in this thread.
Richard.