Hi, I'm working with a hardware simulator - Gem5 (http://gem5.org). I have added some functionality to this simulator to modify memory frequency. I would like to add kernel support to manage memory frequency similar to how cpu frequency is currently maintained so that I can study the cost-benefit of memory frequency scaling. I copied all the generic cpufreq sources to a separate folder kernel_source/drivers/memfreq and setup the drivers/Makefile. I have also done the preliminary Kconfig modifications. A few things I don't follow are Where does the kernel actually implement the delay resulting from cpuinfo.transition_latency? Does the kernel stall for the duration of the delay? the per_cpu macro - I don't understand what this does..How can I implement the same for memory - which I'm considering as a shared resource rather than per_cpu. the subsys interface - What does it do and how do I reproduce this for memory? Can I use the existing bus_type memory_subsys? (drivers/base/memory.c) callback - This seems to be specific for CONFIG_HOTPLUG_CPU..do I need to implement this at all for memfreq? sysfs interface - Is there any place I can look to implement a nice sysfs interface similar to cpufreq? Please let me know if there is anything I've missed out that might complicate the process. Regards Guru -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
