Hi, Current revisions of Cortex-A8 core have a hardware bug in performance monitoring unit, which makes it very unreliable in Oprofile. We discussed this problem offlist with Richard Woodruff some time ago and he suggested to use GPTIMER to get better event samples collection frequency, comparable to the one typically used with the hardware performance counters. The use of GPTIMER instead of a standard oprofile timer based backend makes the process of profiling applications less painful and more precise. Here is my attempt to implement this event monitoring driver. I'm not quite familiar with linux patch submission policy, so might have violated something unintentionally. The code is very simple for now. But tweaking it to work better with power management and frequency scaling may be desired. Best regards, Siarhei Siamashka -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
