On Tue, 2008-01-15 at 22:56 -0500, [EMAIL PROTECTED] wrote: > On Tue, 15 Jan 2008 13:02:26 +0800, Shaohua Li said: > > > In my test, power difference between powersave mode and performance mode > > is about 1.3w in a system with 3 PCIE links. > > Do you have any numbers on what the added latency is for powersave mode, and > a rough idea of how quickly chipsets will drop to low-power? It may affect > usability a lot if it's "adds 10ms latency after 100ms idle" or "adds 100ms > latency after 5 seconds idle" or some other pattern... > > (The chipset in my laptop claims to be an 82801G with 4 PCI-Express ports on > it - I'm trying to get a rough idea what usage I'd get out of that feature..) No, I thought to get the latency impact with ASPM enabled, but haven't found a way to measure it. This is why the default setting of ASPM currently is using BIOS setting.
Thanks, Shaohua -- 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/
