netdev - Re: [PATCH mlx5-next] RDMA/mlx5: Don't use cached IRQ affinity mask

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Date:   Fri, 20 Jul 2018 04:25:32 +0300
From:   Max Gurtovoy <maxg@...lanox.com>
To:     Steve Wise <swise@...ngridcomputing.com>,
        'Sagi Grimberg' <sagi@...mberg.me>,
        'Leon Romanovsky' <leon@...nel.org>
CC:     'Doug Ledford' <dledford@...hat.com>,
        'Jason Gunthorpe' <jgg@...lanox.com>,
        'RDMA mailing list' <linux-rdma@...r.kernel.org>,
        "'Saeed Mahameed'" <saeedm@...lanox.com>,
        'linux-netdev' <netdev@...r.kernel.org>
Subject: Re: [PATCH mlx5-next] RDMA/mlx5: Don't use cached IRQ affinity mask


>>> [ 2032.194376] nvme nvme0: failed to connect queue: 9 ret=-18
>>
>> queue 9 is not mapped (overlap).
>> please try the bellow:
>>
> 
> This seems to work.  Here are three mapping cases:  each vector on its
> own cpu, each vector on 1 cpu within the local numa node, and each
> vector having all cpus in its numa node.  The 2nd mapping looks kinda
> funny, but I think it achieved what you wanted?  And all the cases
> resulted in successful connections.
> 

Thanks for testing this.
I slightly improved the setting of the left CPUs and actually used 
Sagi's initial proposal.

Sagi,
please review the attached patch and let me know if I should add your 
signature on it.
I'll run some perf test early next week on it (meanwhile I run 
login/logout with different num_queues successfully and irq settings).

Steve,
It will be great if you can apply the attached in your system and send 
your findings.

Regards,
Max,

View attachment "0001-blk-mq-fix-RDMA-queue-cpu-mappings-assignments-for-m.patch" of type "text/plain" (4759 bytes)