Hello Steve, On 10/25/07, Steven Rostedt <rostedt@xxxxxxxxxxx> wrote: > > > Please don't top post. > > -- > > On Thu, 25 Oct 2007, Jaswinder Singh wrote: > > > Hello Daniel and Sven-Thorsten Dietrich, > > > > Can you please let me know the procedure of : > > 1. high resolution timers from userspace > > http://rt.wiki.kernel.org/index.php/Cyclictest > As per http://www.mail-archive.com/linux-rt-users@xxxxxxxxxxxxxxx/msg01487.html According to Thomas Gleixner : cyclictest is not about interrupt latency, it's about the full chain of: timer interrupt scheduler user space execution in the second test you did it's: timer interrupt softirq + signal delivery scheduler user space execution Please let me know from cyclictest How can I get separately :- 1. Interrupt latency numbers 2. Task switching numbers > > 2. ingo's irq latency timing and tracing > > I need to write up some howtos for that. > Thanks. Jaswinder Singh. > > > > I will also try these methods and try to compare the performance numbers. > > > > The cyclictest is fine for comparisons, but the latency trace is only > available with the -rt patch. > > -- Steve > > - 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
