Re: [LKP] [lkp] [sctp] a6c2f79287: netperf.Throughput_Mbps -37.2% regression
From: Xin Long
Date: Tue Aug 16 2016 - 04:02:33 EST
>
> 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@hp-dl380pg8-11 lxin]# uname -r
4.8.0-rc2.3684b03
[root@hp-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@hp-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@localhost lxin]# uname -r
4.7.0-rc6.f959fb4
[root@localhost 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@localhost 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 ?