On 13/03/2019 15:59, Shameerali Kolothum Thodi wrote:
Hi Shameer,
>> Can you please give the following patch a go? I can't test it, but hopefully
>> you can.
>
> Thanks for your quick response. I just did a quick test on one of our
> platforms
> with VHE+GICv4 and it seems to fix the performance issue we were seeing
> when GICv4 is enabled.
>
> Test setup:
>
> Host connected to a PC over a 10G port.
> Launch Guest with an assigned vf dev.
> Run iperf from Guest,
>
> 5.0 kernel:
> [ ID] Interval Transfer Bandwidth
> [ 3] 0.0-10.0 sec 1.30 GBytes 1.12 Gbits/sec
>
> +Patch:
>
> [ ID] Interval Transfer Bandwidth
> [ 3] 0.0-10.0 sec 10.9 GBytes 9.39 Gbits/sec
Ah, that looks much better! I'll try to write it properly, as I think
what we have today is slightly bizarre (we write ICH_HCR_EL2 from too
many paths, and I need to remember how the whole thing works).
Thanks,
M.
--
Jazz is not dead. It just smells funny...
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