On Fri, 9 Jan 2015 20:19:51 +0530 Vaibhav Shinde <v.bhav.shi...@gmail.com> wrote:
> Hi Peter, > > Thanks for you reply. > > I am interested in scheduling latency, and using ftrace I see for my > application suffering from it, that's why I am digging in preemption/irq > disable time which might cause the latency. > > My app runs on cpu0, while other cpus looks idle; as per my understanding > from your comment owner of the mutex is on the cpu other than cpu0, and > which is causing wait spin on cpu0. > Can this be the reason why latency is caused ? > If so, then I think I need to take care of the mutex lock which is called > from my code. > If you download and install the latest trace-cmd, you may be able to get more information with its new command "profile". # trace-cmd profile -o file workload Then look at the output in file. To limit the running to tracing only the workload: # trace-cmd profile -o file -F -c workload You'll need to use the latest that's in my repo. Use the master branch, as it has all the above features. git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git -- Steve -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
