Hi guys, WSPR 4.0 SVN 4795 recompiled with FFLAGS += -Ofast and the rest..
Has run from 9:50 this morning to now, 18:10 without crashing: Memory allocation error Cannot start rx thread 11 System: Banana Pi, Fedora 21, http://mirror.as24220.net/pub/fedora/linux/releases/21/Images/armhfp/Fedora-LXDE-armhfp-21-5-sda.raw.xz copied to SATA disk. Booted with kernel 3.4.105+ because Fedora have not ported the Mali video driver yet. ONE MAJOR MOD: Replace Python Imaging Library (Pillow) with 2.5.3 Use the "pip3" tool, Python's installer. 2.6.1 crashes when a waterfall is displayed. For development, a SATA disk is essential. Forget SD cards, full stop. Alan VK2ZIW On Wed, 17 Dec 2014 01:36:44 +0100, Alessandro Gorobey wrote > Hi Joe and all, > I can not in any way discuss the data provided but on my machine the > difference is more that notable. > It is a Pavilion g6 Notebook PC with i5-2430M CPU@2.40Ghz ram 4G > with windows 7 SP1 home > > This is the diff of the two files: > > C:\JTSDK\src\wsjtx-1.4>diff CMakeLists.txt CMakeListsMY.txt > 429c429 > < set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -std=c++11 > -fexceptions -frtti") > --- > > set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -std=c++11 > -fexceptions -frtti -mtune=native") > 476c476 > < set (General_FFLAGS "-fbounds-check -Wall -Wno-conversion > -fno-second-underscore") > --- > > set (General_FFLAGS "-fbounds-check -Wall -Wno-conversion > -fno-second-underscore -mtune=native") > > The program run with JT65+JT9 mode. The version is v1.4.0-rc3 r4783[- > dirty] I removed the build and install directories files to be sure > that all will be rebuild. I increase the number of files to analyze, > stop services and anti-virus, but the difference continue to be > high. Next week I try on other machines or others OS. I start to > think that is not only decoders influence the results. Please note > that i refer to the time to complete several loops. With Shift+F6 on > a directory the program loop on: - read file - display graph - > decode jt65 - show results - decode jt9 - show results - write > ALL.TXTand other files > > I put the mtune=native in the cmake file, so all fortran code but > also c will be generated different. It may be that I have to measure > the execution time between the decodings to understand what happens. > > Many thanks for the detailed informations. > > Next days I'll investigate the strange time difference. > > 73, Merry Christmas and Happy New Year to You your Family and all > the Group > > Sandro IW3RAB > > Il 16/12/2014 21:16, Joe Taylor ha scritto: > > Hi Alessandro and all, > > > > Compiler optimizations can be helpful when tuning code for good > > performance, but I am surprised that you see anything like a 2x > > improvement in decoding speed. > > > > The following table shows the results of a series of tests I made today > > for the decoder (the executable program jt9) running on files like the > > ones you created (01.wav, 02.wav, ... 10.wav, all copies of the example > > file 130610_2343.wav). The first column lists the Fortran compiler > > flags used; the numerical column gives the total execution time (wall > > clock) for processing the ten files. > > > > FFLAGS Time > > ------------------------------------------------ > > -O0 -fbounds-check 42.4 > > -O1 -fbounds-check 22.8 > > -Os -fbounds-check 22.8 > > -O2 -fbounds-check -funroll-all-loops 20.4 * > > -O2 -fbounds-check 20.2 > > -O3 -fbounds-check 19.8 > > -Ofast -fbounds-check 18.9 > > -O2 18.4 > > -O2 -mtune=native 18.4 > > -O2 -funroll-all-loops 18.2 > > -O3 18.0 > > -Ofast 17.8 > > ------------------------------------------------ > > * Used in the release builds of WSJT-X > > > > As you can see, "-mtune=native" made essentially no difference. The > > biggest improvement in execution performance (over the default Release > > build) is gained by turning off bounds-checking. A slight additional > > improvement is obtained by using -O3 or -Ofast rather than -O2. > > However, the total available improvement is less than 15%. > > > > Obviously, such tests will give different results on different machines. > > Those described above were done on a machine with a Core2 Duo E6750 > > CPU, 2.66 Ghz. Here is a similar set of results for a Windows machine > > (Core i5-2500, 3.3 GHz): > > > > FFLAGS Time > > ------------------------------------------------ > > -O0 -fbounds-check 28.5 > > -O1 -fbounds-check 18.2 > > -O2 -fbounds-check -funroll-all-loops 16.6 * > > -O2 -fbounds-check 16.2 > > -O3 -fbounds-check 16.2 > > -Ofast 15.7 > > -O3 -m32 -msse -funroll-all-loops 15.4 > > -O3 -mtune=core2 15.1 > > -O3 -m32 -msse 15.0 > > -O3 -mtune=native 15.0 > > ------------------------------------------------ > > * Used in the release builds of WSJT-X for Windows > > > > The flags we're currently using for Windows Release builds give results > > within about 10% of the best one listed. > > > > One way to look at all of this is that the most important optimizations > > are those that have already been done, by the programmer. These include > > making the best possible choices of data structures, algorithms, loop > > ordering, etc., etc. > > > > -- 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 Alan Man's greatest waste of time: Worshipping the wrong God. Consider Jesus. --------------------------------------------------------------------------- Alan Beard Unix Support Technician from 1984 to today 70 Wedmore Rd. Sun Solaris, AIX, HP/UX, Linux, SCO OpenServer 5.0.X Emu Heights N.S.W. 2750 Routers, terminal servers, printers, terminals etc.. +61 2 47353013 (h) Support Programming, shell scripting, "C", assembler 0414 353013 (mobile) After uni, electr ------------------------------------------------------------------------------ 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
