Re: [PATCH] virtio_blk: set the default scheduler to none

Li Feng
2023-12-28T07:23:50Z

> On Dec 27, 2023, at 18:06, Michael S. Tsirkin <mst@redhat.com> wrote:
>
> On Wed, Dec 27, 2023 at 03:26:30PM +0800, Li Feng wrote:
>>
>>
>>> On Dec 26, 2023, at 23:38, Michael S. Tsirkin <mst@redhat.com> wrote:
>>>
>>> On Tue, Dec 26, 2023 at 05:01:40PM +0800, Li Feng wrote:
>>>> I don't have ideas right now to answer Christoph/Paolo's question.
>>>
>>> Paolo did some testing on this thread and posted some concerns.
>>> Do you disagree with his analysis?
>>
>> Paolo gave a very detailed data analysis. Indeed, in some low queue depth
>> scenarios, the data dropped somewhat. However, I suspect that it may be
>> caused by other problems (such as test fluctuations) rather than the benefits
>> brought by deadline.
>
> Maybe. I think it would be up to you to prove this then.
Ok.

>
>
>> BTW, I think 128 queue depth test is a very important and common performance
>> test item for storage devices.
>>
>> Thanks,
>> Li
>>
>>>
>>> --
>>> MST
>>>
>