I have noticed large interrupt latency when the cpuidle is enabled. e.g. response time for ping goes from avg 10-20ms to 800-1000ms. (I am at HEAD of the 'pm' branch) The IRQs and FIQs are disabled at the beginning of the function omap3_enter_idle() but WFI is executed much later in _omap_sram_idle(). In between, there is only one check for pending IRQs - omap_irq_pending() If any interrupt occurs beyond this point is it considered by the WFI? To reduce this latency, I am planning to do either/both of thse: - Add more checks for pending IRQs - Reduce the time for which the IRQs and FIQs are disabled Benefits will depend upon the behavior of WFI. Best regards, Sanjeev -- 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
