netdev - Re: [PATCH net-next v1 1/1] net: openvswitch: ovs_packet_cmd_execute put sw

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Date:   Sun, 19 Feb 2023 22:46:41 +0800
From:   Eddy Tao <taoyuan_eddy@...mail.com>
To:     Simon Horman <simon.horman@...igine.com>
Cc:     netdev@...r.kernel.org, Pravin B Shelar <pshelar@....org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, dev@...nvswitch.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v1 1/1] net: openvswitch: ovs_packet_cmd_execute
 put sw_flow mainbody in stack

Hi, Simon:

     Thanks for looking into this.

The revisions i proposed are complementary for the same purpose, and 
also reside in the same code segment.

I named them 2 items to clarify the details. Maybe it would be better to 
name them 2 steps in the same revision to avoid confusion.


And yes, i do have some performance result below

Testing topology

             |-----|
       nic1--|     |--nic1
       nic2--|     |--nic2
VM1(16cpus) | ovs |   VM2(16 cpus)
       nic3--|     |--nic3
       nic4--|     |--nic4
             |-----|
2 netperf client threads on each vnic

netperf -H $peer -p $((port+$i)) -t UDP_RR  -l 60 -- -R 1 -r 8K,8K
netperf -H $peer -p $((port+$i)) -t TCP_RR  -l 60 -- -R 1 -r 120,240
netperf -H $peer -p $((port+$i)) -t TCP_CRR -l 60 -- -R 1 -r 120,240

   Mode Iterations   Variance    Average

UDP_RR         10      %1.33      48472 ==> before the change
UDP_RR         10      %2.13      49130 ==> after  the change

TCP_RR         10      %4.56      79686 ==> before the change
TCP_RR         10      %3.42      79833 ==> after  the change

TCP_CRR        10      %0.16      20596 ==> before the change
TCP_CRR        10      %0.11      21179 ==> after  the change

Thanks

eddy