netdev - Re: [PATCH rfc 0/6] Automatic affinity settings for nvme over rdma

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Message-ID: <09b4dcb4-d0ab-43b7-5f1c-394ecfcce2f0@grimberg.me>
Date:   Thu, 6 Apr 2017 11:34:03 +0300
From:   Sagi Grimberg <sagi@...mberg.me>
To:     Max Gurtovoy <maxg@...lanox.com>, linux-rdma@...r.kernel.org,
        linux-nvme@...ts.infradead.org, linux-block@...r.kernel.org
Cc:     netdev@...r.kernel.org, Saeed Mahameed <saeedm@...lanox.com>,
        Or Gerlitz <ogerlitz@...lanox.com>,
        Christoph Hellwig <hch@....de>
Subject: Re: [PATCH rfc 0/6] Automatic affinity settings for nvme over rdma

> Hi Sagi,

Hey Max,

> the patchset looks good and of course we can add support for more
> drivers in the future.
> have you run some performance testing with the nvmf initiator ?

I'm limited by the target machine in terms of IOPs, but the host shows
~10% cpu usage decrease, and latency improves slightly as well
which is more apparent depending on which cpu I'm running my IO
thread (due to the mismatch in comp_vectors and queue mappings
some queues have irq vectors mapped to a core on a different numa
node.