We've been accumulating a few power consumption related documents on the wireless wiki for a while now. One which I saw was missing was for actual power consumption and review of new PCI-E features which should be taken into consideration when debugging power consumption or reviewing it. ASPM is something that I can say I found little to no documentation for when looking into it so I've done a brain dump of what I recall from it, the code review of it, and some e-mail exchanges I've had with Jonathan May @ Atheros. I've stashed together all the power consumption docs at: http://wireless.kernel.org/en/users/Documentation/Power-consumption You'll see there some ASPM docs now and some ath9k specific power consumption metrics/ASPM details. Please review and enhance as you see fit. Yanmin, Shaohua, I see CONFIG_PCIEASPM still marked as experimental, I'm curious if this is still really that experimental and if there are plans for it go out of experimental. Also I am little puzzled with some of the aspm.c code, I see we fill the pci device struct with capability stuff via pcie_aspm_cap_init() but I also see ASPM capability stuff exposed on kernels without CONFIG_PCIEASPM (albeit I see it always disabled on my system at home), so are we filling the capability elsewhere? I think there are some boxes without this kernel config enabled and where ASPM capability info is exposed and does show up as enabled, could be wrong. Also curious -- how often are BIOSes buggy enough for ASPM to get disabled by mistake on the modern devices? And for systems that have no Bios (*cough* ChromeOS) how is this handled? Luis -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
