Re: [ovs-dev] [PATCH RFCv4 0/4] AF_XDP netdev support for OVS

Thu, 18 Apr 2019 01:25:47 -0700 


On 17 Apr 2019, at 19:16, William Tu wrote:


Hi Eelco,
Thanks for trying this patchset!

<SNIP>


In addition you need to do “make install_headers” from kernel 
libbpf

and copy the libbpf_util.h manually.


I was able to do a simple physical port in same physical port out 
test

without crashing, but the numbers seem low:


This probably is due to some log printing.
I have a couple of optimizations, will share it soon.



I do not see any additional logging, and even with all logging disabled, 
I get the same numbers.
Will continue my testing once back from PTO. If you want me to test 
something without sending a new patch set, just let me know what to 
change.




$ ovs-ofctl dump-flows ovs_pvp_br0
  cookie=0x0, duration=210.344s, table=0, n_packets=1784692,
n_bytes=2694884920, in_port=eno1 actions=IN_PORT

"Physical loopback test, L3 flows[port redirect]"
,Packet size
Number of flows,64,128,256,512,768,1024,1514
100,77574,77329,76605,76417,75539,75252,74617

The above is using two cores, but with a single DPDK core I get the
following (on the same machine):

"Physical loopback test, L3 flows[port redirect]"
,Packet size
Number of flows,64,128,256,512,768,1024,1514
100,9527075,8445852,4528935,2349597,1586276,1197304,814854

For the kernel datapath the numbers are:

"Physical loopback test, L3 flows[port redirect]"
,Packet size
Number of flows,64,128,256,512,768,1024,1514
100,4862995,5521870,4528872,2349596,1586277,1197305,814854


But keep in mind it uses roughly 550/610/520/380/180/140/110% of the 
CPU

for the respective packet size.


<SNIP>
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