On Tue, 2009-03-10 at 14:06 +0000, Brian Hutchinson wrote: > We don't have our target hardware yet so I'm trying to get a jump on some of the > newer 2.6 kernel features using a PC. > What hardware are you testing on? > Compiled a 2.6.26.8 with the 2.6.26.8-rt16 patch applied for a Dell Core Duo > laptop and when I run cyclictest the max latency is up around 800us with the > avg. around 65us. > You should compare to the 2.6.24-RT patch set first of all, I would expect worst-cases to be 25% of what you are seeing. If it does not, then your configuration may have too much debugging turned on (boot log warns about some of these) - or you are indeed getting some SMI interference. > I'm running the CFS scheduler in real time mode. > > Is this the best I'm going to see on a PC? I've been reading everything I can > get my hands on and it looks like SMI and BIOS may hinder me from getting much > below what I'm seeing. > SMIs can be turned off in many cases. Some vendors have warranty/support programs tied to SMI architectures, in these cases you might be able to press them for a custom BIOS (depending on volume and how much hell you want to raise) Cheers, Sven > TIA! > > Regards, > > Brian > > -- > 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 -- 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
