linux-kernel - Re: [LKP] [lkp] [sctp] a6c2f79287: netperf.Throughput

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Date:	Tue, 16 Aug 2016 16:02:18 +0800
From:	Xin Long <lucien.xin@...il.com>
To:	Aaron Lu <aaron.lu@...el.com>
Cc:	kernel test robot <xiaolong.ye@...el.com>,
	Stephen Rothwell <sfr@...b.auug.org.au>, lkp@...org,
	"David S. Miller" <davem@...emloft.net>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [LKP] [lkp] [sctp] a6c2f79287: netperf.Throughput_Mbps -37.2% regression

>
> I'm testing on Linus' master, can we all use that please?
>

[git] git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

[mechine]
Intel(R) Xeon(R) CPU E5-2690 v2 @ 3.00GHz
mem 62G (66000220K)

[system]
# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.3 Beta (Maipo)

[commit 3684b03]
[root@...dl380pg8-11 lxin]# uname -r
4.8.0-rc2.3684b03
[root@...dl380pg8-11 lxin]# cat test.sh
killall -0 netserver || netserver -4 &
netperf -4 -t SCTP_STREAM_MANY -c -C -l 300 -- -m 10K -H 127.0.0.1
[root@...dl380pg8-11 lxin]# sh test.sh
SCTP 1-TO-MANY STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to
127.0.0.1 () port 0 AF_INET
Recv   Send    Send                          Utilization       Service Demand
Socket Socket  Message  Elapsed              Send     Recv     Send    Recv
Size   Size    Size     Time     Throughput  local    remote   local   remote
bytes  bytes   bytes    secs.    10^6bits/s  % S      % S      us/KB   us/KB

212992 212992  10240    300.00     16914.99   3.28     3.28     0.636   0.636

[commit f959fb4]
[root@...alhost lxin]# uname -r
4.7.0-rc6.f959fb4
[root@...alhost lxin]# cat test.sh
killall -0 netserver || netserver -4 &
netperf -4 -t SCTP_STREAM_MANY -c -C -l 300 -- -m 10K -H 127.0.0.1
[root@...alhost lxin]# sh test.sh
SCTP 1-TO-MANY STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to
127.0.0.1 () port 0 AF_INET
Recv   Send    Send                          Utilization       Service Demand
Socket Socket  Message  Elapsed              Send     Recv     Send    Recv
Size   Size    Size     Time     Throughput  local    remote   local   remote
bytes  bytes   bytes    secs.    10^6bits/s  % S      % S      us/KB   us/KB

212992 212992  10240    300.00     12975.32   3.35     3.35     0.847   0.846


Still, in my env, the latest kernel is better than old one.
Sorry, I'm not sure why it's so different in your env.

Could you do 'netperf' test manually, instead of lkp-tests, then check again.
Pls show you system's distros as well, like rhel, ubuntu or arch ?