I am developing a high-performance multi-threaded application on the Linux platform. Ideally it is expected that all similar threads run with the same speed. However, there are some situation which One thread may execute while another is waiting for some other system latency. One example of system latency is timer interrupt handlers (LOC) which periodically runs on all CPU cores.
I am looking for a low overhead way to perform system performance debugging and detect such a situations. More specifically, I need to know WHY the application threads does not run with ideal speed and which system task is responsible for that wait state. I think there are some performance statistics about process scheduling in /proc/PID/sched likenr_wakeups. However, I am more interested to know WHY rather than How Many. I used to run ftrace while my application is running to monitor Linux kernel function activities and detect execution of any unusual tasks or interrupts. That was how I detect timer interrupt handlers put my application threads in wait state. However, this method has very high performance overhead and its hard to interpret the output. Ideally, I can put my application threads to specific CPU cores. Then I need a performance monitoring tool which tells me what other processes has been executed on these CPU cores during the execution of my application. Does Valgrind a tool to help me out ? Thanks ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk _______________________________________________ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
