Hello, I have been seeing a problem in which one of my CPUs goes to sleep for 40ms in the middle of running a user-space program. The problem occurs when I have a function in object file X call another function in object file Y. If I add a gettimeofday right before the function call occurs, and then also right at the beginning of the called function, I see a 40ms delay. This only occurs on the first call to any function in file Y. Once a function in file Y is called, all other calls to functions in this file are immediate.
I have added a kernel profiler to the timer interrupt of this CPU - and find that during this 40ms period, the CPU is in r4k_wait - which looks like cpu_idle is running. It almost seems like file Y is being loaded into memory to be used. The program in question is using pthreads and each thread is on a separate CPU. Each CPU is dedicated to running a single thread and nothing else. The files X and Y are two object files linked into a single ELF binary. The kernel version is 2.6.14 and this is a MIPS based processor. Does anyone have any ideas why this delay might be occurring? Thank you in advance, John - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
