[LTP] [PATCH] busy_poll* : revise poll_cmp

[sunlianwen]

Hi Alexey

   You are right, I think is wrong, I debug this case again,

and find the driver is virtio_net no support busy poll.

Thanks your advise.

Best Regards,

Lianwen Sun.


On 03/19/2018 08:25 PM, Alexey Kodanev wrote:
> On 19.03.2018 11:18, sunlianwen wrote:
>> set low latency busy poll to 50 per socket will
>> spent more time than set low latency busy poll
>> to 0 per socket. that mean the value of res_50
>> is bigger than res_0, so the value of poll_comp
>> always less than zero and  test fail.
> No, if busy poll is enabled, i.e. value set above 0, we should expect
> performance gain in this test.
>
> With what driver and kernel version you have such results?
> Is it really supported by that driver?
>
> Thanks,
> Alexey
>
>
>



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