On Mon, Aug 06, 2007 at 10:55:44AM +0200, John Sigler wrote: > John Sigler wrote: > > >I wrote a Linux app where I need high-resolution timers. I went all the > >way and installed the -rt patch, which includes the -hrt patches, as far > >as I understand. > > > >Since I could not afford to change kernels with every new release, I > >decided to track the 2.6.20 branch (arbitrarily). > > > >At this point I'm using 2.6.20.7-rt8 (-rt8 was the last patch to the > >2.6.20 branch). (I see 2.6.20 is already up to .15) > > > >I see a lot of patches going into the -rt patch, but development moved > >on to 2.6.21, then 2.6.22, and now 2.6.23, following mainline. > > > >I'm not a kernel hacker, so I don't claim to understand the patches, but > >the comments sound like a few bugs are fixed here and there. I can't > >tell whether these bugs also exist in previous kernels or only appeared > >in newer kernels. Even if I knew, I probably wouldn't have the expertise > >to back-port the patch. > > > >I'm seeing weird behavior in my app, when it has been running 2-4 days. > >The timers start to act out, and all hell breaks loose. Basically, I > >have no idea what's going on... > > > >My question is: is it possible that there is a bug in 2.6.20-rt8 that > >has been fixed in subsequent -rt patches (there's a 2.6.21.6-rt21 and a > >2.6.22.1-rt9)? In other words, if I give 2.6.21.6-rt8 or 2.6.22.1-rt9 a > >spin, is it possible that my weird behavior disappears? > > > >I'm not saying that it's impossible for the bug to be in my app, but the > >app is small enough that I'm fairly confident there's no problem there. > > Would anyone care to comment? Would you be willing to post your app so people could try to reproduce your bug? Thanx, Paul > Perhaps I could also test a different strategy, such as xenomai? > http://www.xenomai.org/ > > Regards. > - > 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
