Date: Fri, 3 Feb 2012 23:59:29 +0400 From: Solar Designer <solar@...nwall.com> To: john-users@...ts.openwall.com Subject: Re: DES with OpenMP On Fri, Feb 03, 2012 at 03:33:28PM +0000, Alex Sicamiotis wrote: > > An easy thing to check is "size DES_bs_b.o". > > Given my lack of ability to discern asm differences, I just > did the easy thing, heh. I checked the sizes out of curiosity for GCC > 4.6.2 and ICC 12.1 (.o files from plain compilation and -fopenmp > copilation) ... there were huge differences in size (over than 10X) > which is counter-intuitive relative to the 32kb of a l1 cache. Then I > tried with GCC 4.3.2 which was fast in the non-omp version. Indeed > this had differences too. Anyway I gathered most* benchmarks + file > sizes in one spreadsheet: > http://imageshack.us/f/217/resultsarein2.png/ I was literally referring to the output of command: size DES_bs_b.o Specifically, the number it reports for the .text section. It should be around 30 KB, but will vary slightly between the builds. File sizes do not matter - they mostly reflect debugging info and the like, which does not affect performance. I'm sorry that I did not state this more clearly. Alexander
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