Hi Alan, I haven't got qt installed. My results looks like yours results :
lb@mp12-lb:~/plplot.git/examples/c++$ time ./x01 -dev wxwidgets -np PLplot library version: 5.11.1 Fontconfig warning: "/etc/fonts/conf.d/65-droid-sans-fonts.conf", line 103: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/etc/fonts/conf.d/65-droid-sans-fonts.conf", line 138: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/etc/fonts/conf.d/65-droid-sans-fonts.conf", line 103: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/etc/fonts/conf.d/65-droid-sans-fonts.conf", line 138: Having multiple values in <test> isn't supported and may not work as expected real 0m0.407s user 0m0.108s sys 0m0.016s lb@mp12-lb:~/plplot.git/examples/c++$ time ./x01 -dev wxwidgets -np PLplot library version: 5.11.1 Fontconfig warning: "/etc/fonts/conf.d/65-droid-sans-fonts.conf", line 103: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/etc/fonts/conf.d/65-droid-sans-fonts.conf", line 138: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/etc/fonts/conf.d/65-droid-sans-fonts.conf", line 103: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/etc/fonts/conf.d/65-droid-sans-fonts.conf", line 138: Having multiple values in <test> isn't supported and may not work as expected real 0m10.997s user 0m0.064s sys 0m0.040s lb@mp12-lb:~/plplot.git/examples/c++$ time ./x01 -dev xwin -np PLplot library version: 5.11.1 real 0m0.122s user 0m0.056s sys 0m0.020s lb@mp12-lb:~/plplot.git/examples/c++$ time ./x01 -dev xwin -np PLplot library version: 5.11.1 real 0m0.122s user 0m0.060s sys 0m0.016s lb@mp12-lb:~/plplot.git/examples/c++$ time ./x01 -dev xcairo -np PLplot library version: 5.11.1 Fontconfig warning: "/etc/fonts/conf.d/65-droid-sans-fonts.conf", line 103: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/etc/fonts/conf.d/65-droid-sans-fonts.conf", line 138: Having multiple values in <test> isn't supported and may not work as expected real 0m0.125s user 0m0.088s sys 0m0.016s lb@mp12-lb:~/plplot.git/examples/c++$ time ./x01 -dev xcairo -np PLplot library version: 5.11.1 Fontconfig warning: "/etc/fonts/conf.d/65-droid-sans-fonts.conf", line 103: Having multiple values in <test> isn't supported and may not work as expected Fontconfig warning: "/etc/fonts/conf.d/65-droid-sans-fonts.conf", line 138: Having multiple values in <test> isn't supported and may not work as expected real 0m0.128s user 0m0.084s sys 0m0.020s lb@mp12-lb:~/plplot.git/examples/c++$ Le 14/11/2016 à 22:19, Alan W. Irwin a écrit : > Hi Laurent: > > I have put my reply to you on list for obvious reasons. > > On 2016-11-14 14:26+0100 Laurent Berger wrote: > >> Hi Alan, >> >> I would try to help you > > Thanks in advance for that. > >> but I'm not familiar on linux (see attached file for version). > > From what you included, your Linux platform has access to wxwidgets > version 3.0 (as do I). But the rest of your platform (old Linux Mint > distribution using a relatively old kernel version 3.2.0-2-amd64 > compared to my much more modern Debian Jessie using a fairly > up-to-date kernel version 3.16.0-4-amd64) provides an extremely useful > testing contrast in case the issue is some lameness in the IPC > implementation for my particular Linux kernel. (IPC, i.e., > interprocess communication is used to communicate between -dev > wxwidgets and the wxPLViewer application that displays the results.) > >> I think it is this message >> (https://sourceforge.net/p/plplot/mailman/message/34744869/) > > Yes, that message and the following one that provided the screenshots > referred to > in that message are the relevant ones. > >> >> I have build plplot on linux using cmake 3.0.2 using "Unix Makefiles" >> Then sudo make install. I have attached git log result and cmakecache >> Then I run in folder examples/c++ >> ./x01c -dev wxdrivers >> >> I can see a window with 4 curves. Windows title is wxPLviewer. No >> problem >> Now what do you want to test ? > > Speed. > > You measure speed on linux using, e.g., > > software@raven> time examples/c/x01c -dev wxwidgets -np > PLplot library version: 5.11.1 > > real 0m0.652s > user 0m0.064s > sys 0m0.016s > software@raven> software@raven> time examples/c/x01c -dev wxwidgets -np > PLplot library version: 5.11.1 > > real 0m9.327s > user 0m0.072s > sys 0m0.008s > > That -np option stands for "no pause" and allows you to measure time > without waiting for the human reaction of clicking on the GUI to > finish the display. > > Those two measurements obviously have a huge difference in the real > time used. The first timing is not too bad, but (by chance) the second > timed run shows the problem which is quite often there is a random > drop of at least an order of magnitude and sometimes two orders of > magnitude in speed of communications between -dev wxwidgets and > wxPLviewer due to excessive times when my cpus sit absolutely idle (as > proved above by comparison of the sum of the user + sys times and the > real time required to finish the example in the second time run). > (This excessive idle time is also proved by my screenshots of my cpu > meter that are referred to above.) The above results are for the > current master branch tip. By way of comparison here are the > consistent timing results I get for -dev xwin, -dev qtwidget (for > Qt5), and -dev xcairo on my platform. > > software@raven> time examples/c/x01c -dev xwin -np > PLplot library version: 5.11.1 > > real 0m0.482s > user 0m0.008s > sys 0m0.008s > software@raven> time examples/c/x01c -dev xwin -np > PLplot library version: 5.11.1 > > real 0m0.472s > user 0m0.012s > sys 0m0.004s > software@raven> time examples/c/x01c -dev qtwidget -np > PLplot library version: 5.11.1 > libGL error: failed to authenticate magic 759 > libGL error: failed to load driver: nouveau > > real 0m0.472s > user 0m0.088s > sys 0m0.012s > software@raven> software@raven> time examples/c/x01c -dev qtwidget -np > PLplot library version: 5.11.1 > > real 0m0.452s > user 0m0.076s > sys 0m0.020s > software@raven> time examples/c/x01c -dev xcairo -np > PLplot library version: 5.11.1 > > real 0m0.239s > user 0m0.048s > sys 0m0.012s > software@raven> time examples/c/x01c -dev xcairo -np > PLplot library version: 5.11.1 > > real 0m0.229s > user 0m0.044s > sys 0m0.012s > > If you get consistent timing results for -dev wxwidgets no matter how > often you repeat the experiment and those timing results are within a > factor of two of the timing results for one or more of the above > interactive devices, then it is clear the IPC problem is likely due to > some kernel issue on my Debian Jessie platform, and we can write off > my timing results above to that cause. But if you also get wildly > inconsistent and often extremely slow wxwidgets results for a > completely different Linux kernel, then either IPC kernel > implementations on Linux are uniformly bad regardless of kernel > version (a conclusion which I doubt) or the way that -dev wxwidgets > and wxPLviewer currently use IPC to communicate between them is set up > in a bad way for the Linux case, that randomly causes excessive idle > times, and that is an issue that the PLplot development team needs to > urgently address if we ever want the wxwidgets device to be popular on > Linux. > > I am looking forward to your reply with similar time experiments > on your own Linux platform. > > Alan > __________________________ > Alan W. Irwin > > Astronomical research affiliation with Department of Physics and > Astronomy, > University of Victoria (astrowww.phys.uvic.ca). > > Programming affiliations with the FreeEOS equation-of-state > implementation for stellar interiors (freeeos.sf.net); the Time > Ephemerides project (timeephem.sf.net); PLplot scientific plotting > software package (plplot.sf.net); the libLASi project > (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net); > and the Linux Brochure Project (lbproject.sf.net). > __________________________ > > Linux-powered Science > __________________________ -- Laurent Berger Enseignant-chercheur I.U.T. du Mans Département Gestion des Entreprises et des Administrations Département Mesures Physiques Tél 02 43 83 37 09 ------------------------------------------------------------------------------ _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
