On Thursday 19 April 2007, Ingo Molnar wrote: >* Willy Tarreau <[EMAIL PROTECTED]> wrote: >> Good idea. The machine I'm typing from now has 1000 scheddos running >> at +19, and 12 gears at nice 0. [...] >> >> From time to time, one of the 12 aligned gears will quickly perform a >> full quarter of round while others slowly turn by a few degrees. In >> fact, while I don't know this process's CPU usage pattern, there's >> something useful in it : it allows me to visually see when process >> accelerate/decelerate. [...] > >cool idea - i have just tried this and it rocks - you can easily see the >'nature' of CPU time distribution just via visual feedback. (Is there >any easy way to start up 12 glxgears fully aligned, or does one always >have to mouse around to get them into proper position?) > >btw., i am using another method to quickly judge X's behavior: i started >the 'snowflakes' plugin in Beryl on Fedora 7, which puts a nice smooth >opengl-rendered snow fall on the desktop background. That gives me an >idea about how well X is scheduling under various workloads, without >having to instrument it explicitly. > yes, its a cute idea, till you switch away from that screen to check progress on something else, like to compose this message.
=========== 5913 frames in 5.0 seconds = 1182.499 FPS 6238 frames in 5.0 seconds = 1247.556 FPS 11380 frames in 5.0 seconds = 2275.905 FPS 10691 frames in 5.0 seconds = 2138.173 FPS 8707 frames in 5.0 seconds = 1741.305 FPS 10669 frames in 5.0 seconds = 2133.708 FPS 11392 frames in 5.0 seconds = 2278.037 FPS 11379 frames in 5.0 seconds = 2275.711 FPS 11310 frames in 5.0 seconds = 2261.861 FPS 11386 frames in 5.0 seconds = 2277.081 FPS 11292 frames in 5.0 seconds = 2258.353 FPS 11352 frames in 5.0 seconds = 2270.297 FPS 11415 frames in 5.0 seconds = 2282.886 FPS 11406 frames in 5.0 seconds = 2281.037 FPS 11483 frames in 5.0 seconds = 2296.533 FPS 11510 frames in 5.0 seconds = 2301.883 FPS 11123 frames in 5.0 seconds = 2224.266 FPS 8980 frames in 5.0 seconds = 1795.861 FPS ======= The over 2000fps reports were while I was either looking at htop, or starting this message, both on different screens. htop said it was using 95+ % of the cpu even when its display was going to /dev/null. So 'Kewl' doesn't seem to get us apples to apples numbers we can go to the window and bet win-place-show based on them alone. FWIW, running the nvidia-9755 drivers here. So if we are going to use that as a judgement operator, it obviously needs some intelligently applied scaling before they are worth more than a subjective feel is. > Ingo >- >To unsubscribe from this list: send the line "unsubscribe linux-kernel" in >the body of a message to [EMAIL PROTECTED] >More majordomo info at http://vger.kernel.org/majordomo-info.html >Please read the FAQ at http://www.tux.org/lkml/ -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) The confusion of a staff member is measured by the length of his memos. -- New York Times, Jan. 20, 1981 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
