Messages in this thread | | | Subject | Re: [PATCH] PCI/LINK: Account for BW notification in vector calculation | From | Alex G <> | Date | Tue, 23 Apr 2019 09:33:53 -0500 |
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On 4/22/19 7:33 PM, Alex Williamson wrote: > On Mon, 22 Apr 2019 19:05:57 -0500 > Alex G <mr.nuke.me@gmail.com> wrote: >> echo 0000:07:00.0:pcie010 | >> sudo tee /sys/bus/pci_express/drivers/pcie_bw_notification/unbind > > That's a bad solution for users, this is meaningless tracking of a > device whose driver is actively managing the link bandwidth for power > purposes.
0.5W savings on a 100+W GPU? I agree it's meaningless.
> There is nothing wrong happening here that needs to fill > logs. I thought maybe if I enabled notification of autonomous > bandwidth changes that it might categorize these as something we could > ignore, but it doesn't. > How can we identify only cases where this is > an erroneous/noteworthy situation? Thanks,
You don't. Ethernet doesn't. USB doesn't. This logging behavior is consistent with every other subsystem that deals with multi-speed links. I realize some people are very resistant to change (and use very ancient kernels). I do not, however, agree that this is a sufficient argument to dis-unify behavior.
Alex
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