lkml.org 
[lkml]   [2015]   [Nov]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: linux-next network throughput performance regression
From
Date
On Mon, 2015-11-09 at 20:23 +0000, Simon Xiao wrote:
> Thanks Eric to provide the data. I am looping Tom (as I am looking into his recent patches) and Olaf (from Suse).
>
> So, if I understand it correctly, you are running netperf with single
> TCP connection, and you got ~26Gbps initially and got ~30Gbps after
> turning the tx-usecs and tx-frames.
>
> Do you have a baseline on your environment for the best/max/or peak
> throughput?

The peak on my lab pair is about 34Gbits, usually I get this if I pin
the receiving thread on a cpu, otherwise process scheduler can really
hurt too much.

lpaa23:~# DUMP_TCP_INFO=1 ./netperf -H lpaa24 -l 20 -Cc -T ,1
MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to lpaa24.prod.google.com () port 0 AF_INET : cpu bind
tcpi_rto 201000 tcpi_ato 0 tcpi_pmtu 1500 tcpi_rcv_ssthresh 29200
tcpi_rtt 101 tcpi_rttvar 15 tcpi_snd_ssthresh 289 tpci_snd_cwnd 289
tcpi_reordering 3 tcpi_total_retrans 453
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

87380 16384 16384 20.00 33975.99 1.27 3.36 0.147 0.389

Not too bad, I don't recall reaching more than that ever.




\
 
 \ /
  Last update: 2015-11-10 00:21    [W:0.059 / U:0.200 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site