Have you got a batch file or such so perhaps I can try and replicate this too?
It seems the current fftwf build from JTSDK uses different flags. CFLAGS = -O3 -fomit-frame-pointer -mtune=native -malign-double -fstrict-aliasing -fno-schedule-insns -ffast-math Mike W9MDB -----Original Message----- From: Joe Taylor [mailto:j...@princeton.edu] Sent: Wednesday, December 17, 2014 9:13 AM To: WSJT software development Subject: Re: [wsjt-devel] Crazy test Hi Alessandro, I replicated your tests as exactly as possible, modifying CMAKE_CXX_FLAGS and General_FFLAGS by the addition of "-mtune=native". Using WSJT-X and the "Shift+F6" command, the sequence of ten files (01.wav, 02,wav, ... 10.wav) was processed in 21 seconds with or without the addition of "-mtune=native" before building the program from scratch. I could find no measurable difference in execution speed for the two cases. Certainly they were the same to within 1 second. I note also that the total execution time is very nearly the same as what I reported yesterday for the execution of jt9[.exe] from the command line. Almost all of the CPU-intensive "number crunching" in WSJT-X occurs in the Fortran code in jt9. Other tasks such as display of graphical information and decoded text, writing output files, etc., make comparatively trivial demands on CPU resources. It remains a mystery to me why you have seen large differences in execution speed after adding the compiler flag "-mtune=native". -- 73, Joe, K1JT ---------------------------------------------------------------------------- -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
