On Thu, 2009-04-23 at 11:37 +0200, Philippe Gerum wrote: > On Thu, 2009-04-23 at 11:20 +0200, vikesh rambaran wrote: > > Hi > > > > Thanx for the updated patch. Some feedback ... > > > > I tested it with Xenomai 2.4.7 under Ubuntu 8.04.2 on three different > > platforms > > (AMD Athlon Desktop, Intel Core 2 Desktop, Intel Core Duo Laptop) > > > > Typical system lockups when in the gnome desktop do NOT occur > > anymore ! Great :) > > > > Initial observations when compared to Xenomai 2.4.5 with > > adeos-ipipe-2.6.24-x86-2.0-07.patch. : > > > > 1. Latency test shows a slight increase of about 5 to 10 % on the > > Intel platforms. > > (Still need to do the comparison on the AMD platform). This translates > > to less than 5 uS > > so it's ok for our case. > > > > 2. On the Intel Core 2 Desktop, our application has a much more > > significant max scheduling jitter > > of about 125 uS (compared with < 60uS for Xenomia 2.4.5). This > > 'increased jitter' does not > > show up on the other two platforms. Still trying to trace this one. > > Time for an I-pipe tracer log, with latency -f. I guess this > pathological jitter should trigger with standard tests as well; if it > does not, well, there might be other regression spots in the APIs.
Actually, 2.4.5 -> 2.4.7 should only introduce maintenance fixes, so no heavy changes that might trigger such blatant regression. Usual suspect in that case is the I-pipe again, due to the 2.6.24 -> 2.6.29 transition, and less likely the Xenomai core. In any case, 125 us is pathological. > > .config would help as well. TIA, > This still applies. > > Already played around with > > different ACPI and SMI settings, but no joy (: > > > > > > Keep well > > Vicki > > > > _______________________________________________ > > Xenomai-help mailing list > > [email protected] > > https://mail.gna.org/listinfo/xenomai-help -- Philippe. _______________________________________________ Xenomai-help mailing list [email protected] https://mail.gna.org/listinfo/xenomai-help
