On Tue, 2006-09-05 at 11:03 +0200, Pavel Machek wrote: > Hi! > > > > > This patch takes advantage of the infrastructure introduced in the last > > > > patch, and allows the processor idle algorithm to proactively choose a > > > > c-state based on the time the next timer interrupt is expected to occur. > > > > It preserves the residency metric, so the algorithm should, in theory, > > > > remain effective against bursts of activity from other interrupt > > > > sources. > > > > > > > > This patch is mostly intended to be illustrative. There may be some > > > > "#ifdef CONFIG_ACPI" issues, and I would appreciate any advice on > > > > implementing this more cleanly. > > > > Okay, just to get you some feedback: > > > > It seems to change things a _lot_. Power consumption with usb modules > > loaded went from 14315mW to 13800mW -- that is huge > > deal. Unfortunately something strange is going on: with stock kernel, > > power consumption is mostly constant. With your patch, it varies a > > lot, at 2 second timescale. > > > > Power consumption with usb unloaded (only way to get reasonable power > > on x60) went from stable 10450mW to something rapidly changing, and > > probably even worse than original: > > I also noticed that with your patch, bus master activity tends to be constant?! Is this the case even when userspace touches the disk? On my hardware I see a constant flow of short BM activity bursts. Thanks, Adam - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
