Matthias Luescher <m.luescher <at> vtxmail.ch> writes: > > > Specifically, my laptop is a Dell Latitude D620. > > We have tried very hard to achieve real time performance with the > Dell Latitude D620 (we have tested different kernels, different configurations, > different bios versions, modified the bios settings, called the Dell customer service, ...). > After all it looks like there is no way to achieve hard real time performance with this > type of device. > > We had more luck (sub 100us latency) with the following notebooks: > - Lenovo T61, with dual core processor T8300, 2 GB RAM > - Asus V1SSeries with dual core processor T7500 > > On both devices we had to disable some power management features. > Please note that pressing some function keys can still result in huge latencies if > the bios implementation is bad enough. > > Desktop PCs usually work without big latencies. > > Best regards > Matthias > > -- > To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in > the body of a message to majordomo <at> vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > > Just wanted to post an update. I build 2.6.24.7 with rt patch and installed on a 10 year old ASUS MEW motherboard with a 366MHz Celeron running Debian 5.0. Cyclictest -a -t -n -p99 reports avg of 29us and max of 74us!!! Wow! OK, now I just need to do the same thing on a ARM 926EJ-S board (once I get one). Thanks to everyone for all the suggestions. I wouldn't have thought that 10 year old desktop hardware could beat the pants off a modern laptop. -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
