[edk2-devel] [PATCH 1/3] UsbNetworkPkg/UsbRndis: Add USB RNDIS devices support
Rebecca Cran
quic_rcran at quicinc.com
Tue Jan 10 05:07:16 UTC 2023
You might still be using the Metronome driver from EmbeddedPkg instead
of MdeModulePkg. That will for example cause gBS->Stall to take much
longer than it should.
--
Rebecca Cran
On 1/8/23 03:41, tinhnguyen via groups.io wrote:
> Hi RichardHo,
>
> This driver has interested me.
> I've ported your driver to tinh_ampere_edk2
> <https://github.com/tinhnampere/edk2/tree/support_usbnet> and
> tinh_ampere_edk2_platform
> <https://github.com/tinhnampere/edk2-platforms/tree/support_usbnet>.
> I'm having the same issue with our USB CDC ECM driver, which we've
> already published here Ampere USB CDC Net
> <https://github.com/AmpereComputing/edk2-platforms/tree/ampere/Platform/Ampere/AmperePlatformPkg/Drivers/UsbCdcEthernetDxe>.
> That is a bug in polling performance; we also have a thread with the
> same issue USB Net for Aarch64 platform
> <https://edk2.groups.io/g/devel/topic/30905775#9791,>
>
> Currently, on the Jade platform (use your USB net driver), performance
> is quite low and the OS cannot be booted.
>
> The root cause is that we spend a long time waiting for USB
> UsbBulkTransfer to complete, but if there is no data to communicate
> -> it will always time out.
>
> I have no idea why the polling time of MNP is 10 ms
> #defineMNP_SYS_POLL_INTERVAL(10 * TICKS_PER_MS)// 10 milliseconds,
> But I don't see why it should be changed; it could have some unexpected
> consequences for other platforms.
>
> I have a workaground for Ampere usb net driver: /I include a function
> like "filter," "slow down," or something similar. If there are a lot of
> transaction timeouts, I reject some income requests from the upper
> layer. I've already tried it on your driver /tinh_ampere_edk2
> <https://github.com/tinhnampere/edk2/tree/support_usbnet>/, and it works ./
> /
> /Anyway, hope you can solve this problem; I think many platforms are
> experiencing the same issue.
>
> Thanks,
> Tinh Nguyen
>
>
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