>>Because x11perf and gtkperf exercise different code in the X >>server,obviously. yes, they both do not run same kind of test cases. But, isn't gtkperf running on an accelerated server should give better results than that on an accelerated server?? To know the exact reason, i have made a small Gtk application which draws a fillrect 100 times using gdk_draw_rectangle() call. I have checked the implementation of function used by gdk to draw a rectangle - gdk_x11_draw_rectangle() function which internally calls XFillRectangle/XDrawRectangle(). The same XFillRectangles() (though not excatly same as XFillRectangle() its almost same) function is called by x11perf to execute -rect500 test case. Even though both of these (gdk_draw_rectangle() and x11perf -rect500) calls XFillRectangle/XFillRectangles() internally why is the improvement is shown only in x11perf case?? Is gdk is causing some overhead?? i am including the function of gtk application that i have used below: static void test_gtk_drawrects ( void ) { GtkWidget *window = gtk_test_create_simple_window ( "Test Window", "Test: gtk_draw_rectangle" ); GtkWidget *darea = gtk_drawing_area_new (); GTimer *gtimer = g_timer_new(); gint repeat = 5; gtk_widget_set_size_request ( darea, 500, 500 ); gtk_container_add ( GTK_CONTAINER ( GTK_BIN ( window )->child ), darea ); gtk_widget_show ( darea ); gtk_widget_show_now ( window ); while ( repeat-- ) { gint i, many = 100; double elapsed_time; while ( gtk_events_pending () ) gtk_main_iteration (); /* run a number of consecutive drawing requests, just using drawing queue */ g_timer_start ( gtimer ); for ( i = 0; i < many; i++ ) { gdk_draw_rectangle ( darea->window, darea->style->black_gc, TRUE, 0, 0, 500, 500 ); } g_timer_stop ( gtimer ); elapsed_time = g_timer_elapsed ( gtimer, NULL ); printf("\nGtkDrawRectangle Time - %lf\n", elapsed_time); gdk_flush(); while ( gtk_events_pending () ) gtk_main_iteration (); } g_timer_destroy ( gtimer ); sleep(3); gtk_widget_destroy ( window ); } <div class="gmail_quote"> On Thu, Dec 3, 2009 at 9:08 PM, Vincent Torri <<a href="mailto:vtorri@univ-evry.fr">vtorri@univ-evry.fr</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div class="im"> On Thu, 3 Dec 2009, Arnaud Mouiche wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> I think gtkperf is more a tool to test gtk non-regression or optimization (on a same X server), than a tool to test X. I tried to use it to see if EXA optimizations that optimize everything by doing nothing (screen stay black), makes Gtkperf more efficient. the result was that xorg without EXA management overhead (so without any optmization) gives better results than xorg with a EXA optimization that can't be more efficient... Indeed, gtkperf ony creat pixmap, but doesn't try to move / blit / compose... all the thing a acceleration can be used for. so what you need is a perf tool more usefull that measure the user experience feeling (scrolling, transparency, move, composition). Does somebody know one ? I'm also interested. </blockquote> </div> you can try render_bench, written by Carsten Haitzler: <a href="http://www.rasterman.com/files/render_bench.tar.gz" target="_blank">http://www.rasterman.com/files/render_bench.tar.gz</a> it mesures some operations, maybe not all you want though. Vincent Torri<div><div></div><div class="h5"> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> arnaud Alan Coopersmith wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> prudhvi raj wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> My question is why is the performance improvement shown through x11perf is not getting reflected when we run gtkperf?? </blockquote> x11perf is a wonderful way to make you optimize code that no one ever calls. Notice that all the x11perf tests are single color, and use the Xlib drawing routines, while gtk is multicolor and usually does not use Xlib drawing. </blockquote> </blockquote> </div></div></blockquote></div>