On Thu, Mar 28, 2019 at 2:13 PM theman whosoldtheworld <[email protected]> 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
