March 13, 20233 yr Im trying to get to higher c-states. I have spent some time going through the BIOS to enable ASPM on as many PCIE items as I can find. But I am struggling with addressing all of them. As you can see the ones with ASPM disabled are root ports 10 and 17 and also the AST1150 PCI-to-PCI bridge. In the BIOS port 10 has the same settings as the rest (ASPM enabled), and port 17 is delegated to USB/SATA and I have no control options. For the PCI bridge, I am unsure what settings to change. In general I enter the BIOS with ctrl+alt+f3, I wonder if this is complicating things by making too many options available. Powertop shows nothing higher that C3 for the package. Note that I have a Vm with blue iris running when this snapshot was taken. If that VM is not running the package C3 percentage can hit ~50%. and it also shows a number of devices at 100% Any assistance would be greatly appreciated. Edited March 15, 20233 yr by tdatta correct model numner for AST1150
March 15, 20233 yr Author Ok, so I went through the bios and disabled a number of things. And then I forcibly set ASPM for all that had is disabled by setting the PCI link control registers manually. This yields the following output: Interestingly this "allowed" me to set L1 for a device which claims it doesnt support ASPM (port #17 above). Yet now when I go through powertop I still dont see any states above C3 for the package Any thoughts on this?
August 25, 20241 yr On 3/15/2023 at 8:58 PM, tdatta said: Ok, so I went through the bios and disabled a number of things. And then I forcibly set ASPM for all that had is disabled by setting the PCI link control registers manually. This yields the following output: Interestingly this "allowed" me to set L1 for a device which claims it doesnt support ASPM (port #17 above). Yet now when I go through powertop I still dont see any states above C3 for the package Any thoughts on this? @tdatta Can I ask you what you disabled to get the ASPEED 1150 get L1? I see it as disabled when using lspci command Edited August 25, 20241 yr by firstTimer
October 13, 20241 yr Have you made any progress on this topic? I have a similar problem using TrueNAS, discussed here: https://forums.truenas.com/t/supermicro-a2sdi-8c-hln4f-not-reaching-higher-c-states/15396
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