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

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Message-Id: <20200717.103711.2273998579805096655.davem@davemloft.net>
Date:   Fri, 17 Jul 2020 10:37:11 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     echaudro@...hat.com
Cc:     netdev@...r.kernel.org, dev@...nvswitch.org, kuba@...nel.org,
        pabeni@...hat.com, pshelar@....org
Subject: Re: [PATCH net-next] net: openvswitch: reorder masks array based
 on usage

From: Eelco Chaudron <echaudro@...hat.com>
Date: Wed, 15 Jul 2020 14:09:28 +0200

> 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>

Applied, thanks.