Re: [PATCH v7] NVMe: conversion to blk-mq

Keith Busch
2014-06-13T15:17:19Z

On Fri, 13 Jun 2014, Jens Axboe wrote:
> On 06/13/2014 09:05 AM, Keith Busch wrote:
>> Here are the performance drops observed with blk-mq with the existing
>> driver as baseline:
>>
>> CPU : Drop
>> ....:.....
>> 0 : -6%
>> 8 : -36%
>> 16 : -12%
>
> We need the hints back for sure, I'll run some of the same tests and
> verify to be sure. Out of curiousity, what is the topology like on your
> box? Are 0/1 siblings, and 0..7 one node?

0-7 are different cores on node 0, with 16-23 being their thread
siblings. Similiar setup with 8-15 and 24-32 on node 1.