Gary Fixler wrote: > I tried to send a message last night, but it never showed up on the list. I > have the worst time getting messages through. > > Basically, I'm on an aging Shuttle PC from 2002 with an Nvidia GeForce4 Ti > 4600. When I start up latency-test, I'm in the single-digit thousands, like > 6500 or so. If I play around online with Flash things (e.g. the Fantastic > Contraption game) it jumps to about 35k(ns) for the base thread jitter. If I > open glxgears it usually bumps up to 150k+, and if I maximize it, it soars > to well over 350k, sometimes almost 400k. The machine does feel laggy - slow > window redraws when dragging windows - but I'm also used to a much faster > machine now.
Severe latency problems when running GLXgears almost always points towards hardware graphics acceleration. Usually the video board manufacturer has a proprietary driver which either disables interrupts for long periods, or does bus mastering DMA, or something else that interferes with the computer doing realtime code. There are two solutions to that: 1) use an open-source driver, such as the generic vesa driver, which doesn't use hardware acceleration. Graphics will be slower, but realtime performance will improve 2) switch to a different, perhaps older, graphics card Many people have had success with various Matrox cards Regards, John Kasunich ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
