netdev - Re: [PATCH net-next] net: openvswitch: reorder masks array based on usage

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Message-ID: <b9274778380debaacd8f31d7720df5c48457c0c7.camel@redhat.com>
Date:   Wed, 15 Jul 2020 16:37:41 +0200
From:   Paolo Abeni <pabeni@...hat.com>
To:     Eelco Chaudron <echaudro@...hat.com>, netdev@...r.kernel.org
Cc:     davem@...emloft.net, dev@...nvswitch.org, kuba@...nel.org,
        pshelar@....org
Subject: Re: [PATCH net-next] net: openvswitch: reorder masks array based on
 usage

On Wed, 2020-07-15 at 14:09 +0200, Eelco Chaudron wrote:
> This patch reorders the masks array every 4 seconds based on their
> usage count. This greatly reduces the masks per packet hit, and
> hence the overall performance. Especially in the OVS/OVN case for
> OpenShift.
> 
> Here are some results from the OVS/OVN OpenShift test, which use
> 8 pods, each pod having 512 uperf connections, each connection
> sends a 64-byte request and gets a 1024-byte response (TCP).
> All uperf clients are on 1 worker node while all uperf servers are
> on the other worker node.
> 
> Kernel without this patch     :  7.71 Gbps
> Kernel with this patch applied: 14.52 Gbps
> 
> We also run some tests to verify the rebalance activity does not
> lower the flow insertion rate, which does not.
> 
> Signed-off-by: Eelco Chaudron <echaudro@...hat.com>
> Tested-by: Andrew Theurer <atheurer@...hat.com>

Reviewed-by: Paolo Abeni <pabeni@...hat.com>

/P