Performance issues with raspberry pi 2
Hans Petter Selasky
hps at selasky.org
Wed Jul 15 15:56:59 UTC 2015
On 05/18/15 00:02, Daisuke Aoyama wrote:
>
> Previous subset does not work correctly in ratecheck.
> I don't know a reason but same code from ODROID-C1 version works.
> I re-create the patch as dwc_otg-rpi2-20150518.patch.
>
> http://www.peach.ne.jp/archives/rpi/patch/dwc_otg-rpi2-20150518.patch
Hi,
I've finally had time to look at your patch, and it has some clever new
ideas to optimise the DWC OTG performance. I like it and will do some
work to integrate your patches like promised this week. It might be too
late for the coming 10.x release, but will for sure hit 10-stable when
the next 10.x is out. Thank you!
One question though: Are the WMB's and RMB's strictly needed? Isn't the
I/O memory mapped coherently?
Did you consider enabling the TXFIFOEMPTY IRQs instead of spinning?
--HPS
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