Messages in this thread | | | Date | Thu, 24 Jan 2008 17:22:58 +0000 | From | Pavel Machek <> | Subject | Re: [PATCH]PCIE ASPM support - takes 3 |
| |
Hi!
> v3->v2, fixed the issues Matthew Wilcox raised. > > PCI Express ASPM defines a protocol for PCI Express components in the D0 > state to reduce Link power by placing their Links into a low power state > and instructing the other end of the Link to do likewise. This > capability allows hardware-autonomous, dynamic Link power reduction > beyond what is achievable by software-only controlled power management. > However, The device should be configured by software appropriately. > Enabling ASPM will save power, but will introduce device latency.
How big is the latency? 1msec? 10msec? 100usec?
-- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
| |