Il giorno sab 30 mar 2019 alle ore 04:26 Przemek Klosowski < przemek.klosow...@gmail.com> ha scritto:
> On Thu, Mar 28, 2019 at 2:13 PM theman whosoldtheworld < > bleachk...@gmail.com> > wrote: > > > > > PCW in the forum normally suggest desktop motherboard ... Is it just a > > matter of Platform Controller Hub that prevented the rt-preemt kernels > > from having good performances? > > > I always thought the realtime latencies are mostly caused by the black > magic of the SMB---the system management firmware which is allowed to take > over completely from the main CPU. Somehow this is connected to the video > hardware: even though video normally does not have its own non-preemptible > firmware. The way I understand it, the SMB code ends up calling the video > callbacks which are poorly designed and take excessively long. > > Since SMB is a black box subsystem, there's no way to predict its > latencies. My understanding is that there is only one sure way to find > out: run latency tests, like LinuxCNC is doing. > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
