[PATCH v4 0/2] Introduce service-time multipath policy and document

[Jens Axboe]

On 11/27/24 1:03 AM, Chaitanya Kulkarni wrote:
> On 11/25/24 02:38, Guixin Liu wrote:
>> Hi,
>>    This patchset introduce a new multipath policy, service-time, and also
>> add a new document to introduce nvme-multipath and all policies supported.
> 
> When we added a new policy last time John has share his setup and 
> performance numbers to justify his change :- 
> https://lists.infradead.org/pipermail/linux-nvme/2024-June/048208.html
> 
> on the same line, sine you are claiming to achieve lower latency and 
> higher throughput in the patch commit log, do you have performance 
> numbers that shows the benefit of this change ? I'm not sure how I'm I 
> supposed to even test this patch perhaps you can share testing 
> methodology and numbers you got.

Agree, especially with now sharing an atomic across all queues that
is incremented and decremented on either side of the IO life time.
That always rings warning bells for me, on being a big scaling
reducer.

-- 
Jens Axboe