On Wed, 2008-08-13 at 12:03 -0500, Jon Elson wrote: > John Kasunich wrote: > > > > > Unfortunately, conversion from clocks to time is non-trivial, so we > > simply report the results in clocks. The situation is getting worse, > > not better. In the name of "progress", we now have to deal with CPUs > > that change their clock frequencies on the fly. I've even heard a > > report that on some modern CPUs, the TSC can no longer even be counted > > on to be monotonic. > Newer Intel and AMD CPUs have thermal protection logic that > causes it to skip clocks when geting hot, and shuts off the > clock when severely overheated (150 C die temp). Just what you > need in a guaranteed-latency real-time system! > > Jon
Are there other CPU's that would better cater to realtime? Some sort of lean, fast RISC, not designed to cope with Windows "upgrades". -- Kirk Wallace (California, USA http://www.wallacecompany.com/machine_shop/ Hardinge HNC/EMC CNC lathe, Bridgeport mill conversion, doing XY now, Zubal lathe conversion pending Craftsman AA 109 restoration Shizuoka ST-N/EMC CNC) ------------------------------------------------------------------------- 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
