Hi,
I (and msaitoh@n.o) want to enable WM_EVENT_COUNTERS default to troubleshoot
easily. Yes, someone worry about performance degrade. So I measure each
performance with/without WM_EVENT_COUNTERS.
I measure the following benchmark on Atom C2758 system.
- ipgen (https://github.com/iij/ipgen)
- iperf3 client side
- iperf3 server side
# There are the measurement results at the end of this mail.
The difference seems to be within measurement error.
Someone may worry about any other effects, I will add new kernel option
WM_DISABLE_EVENT_COUNTERS, please use it.
Though?
Here is the measurement result.
+ GENERIC (without WM_EVENT_COUNTERS)
- ipgen
====================
rfc2544 tolerable error rate: 0.1000%
rfc2544 trial duration: 30 sec
rfc2544 pps resolution: 0.0010%
framesize|0M 100M 200M 300M 400M 500M 600M 700M 800M 900M 1Gbps
---------+----+----+----+----+----+----+----+----+----+----+
64 |## 39.46Mbps,
77061/1488095pps
128 |#### 70.10Mbps,
68454/ 844594pps
512 |############## 276.68Mbps,
67550/ 234962pps
1024 |############################## 599.21Mbps,
73146/ 119731pps
1280 |##################################### 738.41Mbps,
72110/ 96153pps
1408 |########################################## 822.85Mbps,
73051/ 87535pps
1518 |############################################# 888.32Mbps,
73149/ 81274pps
framesize|0
|100k|200k|300k|400k|500k|600k|700k|800k|900k|1.0m|1.1m|1.2m|1.3m|1.4m|1.5m pps
---------+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
64 |###
77061/1488095pps, 5.18%
128 |###
68454/ 844594pps, 8.10%
512 |###
67550/ 234962pps, 28.75%
1024 |###
73146/ 119731pps, 61.09%
1280 |###
72110/ 96153pps, 75.00%
1408 |###
73051/ 87535pps, 83.45%
1518 |###
73149/ 81274pps, 90.00%
====================
- iperf3 client side
====================
# iperf3 -c 192.168.0.254 -b 1000M
Connecting to host 192.168.0.254, port 5201
[ 4] local 192.168.0.20 port 65530 connected to 192.168.0.254 port 5201
[ ID] Interval Transfer Bandwidth Retr Cwnd
[ 4] 0.00-1.00 sec 93.2 MBytes 781 Mbits/sec 0 525 KBytes
[ 4] 1.00-2.00 sec 111 MBytes 935 Mbits/sec 0 773 KBytes
[ 4] 2.00-3.00 sec 112 MBytes 938 Mbits/sec 0 960 KBytes
[ 4] 3.00-4.00 sec 112 MBytes 938 Mbits/sec 0 1.09 MBytes
[ 4] 4.00-5.00 sec 112 MBytes 937 Mbits/sec 0 1.22 MBytes
[ 4] 5.00-6.00 sec 104 MBytes 870 Mbits/sec 0 1.34 MBytes
[ 4] 6.00-7.00 sec 111 MBytes 934 Mbits/sec 0 1.45 MBytes
[ 4] 7.00-8.00 sec 112 MBytes 936 Mbits/sec 0 1.55 MBytes
[ 4] 8.00-9.00 sec 111 MBytes 929 Mbits/sec 0 1.56 MBytes
[ 4] 9.00-10.00 sec 109 MBytes 919 Mbits/sec 0 1.56 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-10.00 sec 1.06 GBytes 911 Mbits/sec 0 sender
[ 4] 0.00-10.00 sec 1.06 GBytes 911 Mbits/sec receiver
iperf Done.
====================
- iperf3 server side
====================
# iperf3 -s
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 192.168.0.254, port 47242
[ 5] local 192.168.0.20 port 5201 connected to 192.168.0.254 port 47244
[ ID] Interval Transfer Bandwidth
[ 5] 0.00-1.00 sec 67.0 MBytes 561 Mbits/sec
[ 5] 1.00-2.00 sec 88.4 MBytes 740 Mbits/sec
[ 5] 2.00-3.00 sec 98.3 MBytes 826 Mbits/sec
[ 5] 3.00-4.00 sec 103 MBytes 861 Mbits/sec
[ 5] 4.00-5.00 sec 103 MBytes 864 Mbits/sec
[ 5] 5.00-6.00 sec 105 MBytes 881 Mbits/sec
[ 5] 6.00-7.00 sec 104 MBytes 877 Mbits/sec
[ 5] 7.00-8.00 sec 91.3 MBytes 767 Mbits/sec
[ 5] 8.00-9.00 sec 94.0 MBytes 787 Mbits/sec
[ 5] 9.00-10.00 sec 106 MBytes 889 Mbits/sec
[ 5] 10.00-10.04 sec 3.83 MBytes 899 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth
[ 5] 0.00-10.04 sec 0.00 Bytes 0.00 bits/sec sender
[ 5] 0.00-10.04 sec 964 MBytes 806 Mbits/sec receiver
====================
+ GENERIC with WM_EVENT_COUNTERS
- ipgen
====================
rfc2544 tolerable error rate: 0.1000%
rfc2544 trial duration: 30 sec
rfc2544 pps resolution: 0.0010%
framesize|0M 100M 200M 300M 400M 500M 600M 700M 800M 900M 1Gbps
---------+----+----+----+----+----+----+----+----+----+----+
64 |## 39.57Mbps,
77279/1488095pps
128 |#### 67.56Mbps,
65979/ 844594pps
512 |################ 302.83Mbps,
73934/ 234962pps
1024 |############################## 586.94Mbps,
71648/ 119731pps
1280 |###################################### 744.40Mbps,
72695/ 96153pps
1408 |########################################## 832.76Mbps,
73931/ 87535pps
1518 |############################################# 889.38Mbps,
73236/ 81274pps
framesize|0
|100k|200k|300k|400k|500k|600k|700k|800k|900k|1.0m|1.1m|1.2m|1.3m|1.4m|1.5m pps
---------+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
64 |###
77279/1488095pps, 5.19%
128 |###
65979/ 844594pps, 7.81%
512 |###
73934/ 234962pps, 31.47%
1024 |###
71648/ 119731pps, 59.84%
1280 |###
72695/ 96153pps, 75.60%
1408 |###
73931/ 87535pps, 84.46%
1518 |###
73236/ 81274pps, 90.11%
====================
- iperf3 client side
====================
# iperf3 -c 192.168.0.254 -b 1000M
Connecting to host 192.168.0.254, port 5201
[ 4] local 192.168.0.20 port 65534 connected to 192.168.0.254 port 5201
[ ID] Interval Transfer Bandwidth Retr Cwnd
[ 4] 0.00-1.00 sec 98.2 MBytes 823 Mbits/sec 0 2.17 MBytes
[ 4] 1.00-2.00 sec 112 MBytes 937 Mbits/sec 0 3.94 MBytes
[ 4] 2.00-3.00 sec 112 MBytes 938 Mbits/sec 0 4.99 MBytes
[ 4] 3.00-4.00 sec 107 MBytes 894 Mbits/sec 0 451 KBytes
[ 4] 4.00-5.00 sec 111 MBytes 928 Mbits/sec 0 723 KBytes
[ 4] 5.00-6.00 sec 110 MBytes 925 Mbits/sec 0 918 KBytes
[ 4] 6.00-7.00 sec 109 MBytes 911 Mbits/sec 0 1.03 MBytes
[ 4] 7.00-8.00 sec 112 MBytes 936 Mbits/sec 0 1.05 MBytes
[ 4] 8.00-9.00 sec 111 MBytes 932 Mbits/sec 0 1.07 MBytes
[ 4] 9.00-10.00 sec 112 MBytes 936 Mbits/sec 0 1.08 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-10.00 sec 1.07 GBytes 916 Mbits/sec 0 sender
[ 4] 0.00-10.00 sec 1.07 GBytes 916 Mbits/sec receiver
iperf Done.
====================
- iperf3 server side
====================
# iperf3 -s
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 192.168.0.254, port 48470
[ 5] local 192.168.0.20 port 5201 connected to 192.168.0.254 port 48472
[ ID] Interval Transfer Bandwidth
[ 5] 0.00-1.00 sec 65.9 MBytes 553 Mbits/sec
[ 5] 1.00-2.00 sec 91.7 MBytes 769 Mbits/sec
[ 5] 2.00-3.00 sec 97.6 MBytes 819 Mbits/sec
[ 5] 3.00-4.00 sec 102 MBytes 854 Mbits/sec
[ 5] 4.00-5.00 sec 102 MBytes 856 Mbits/sec
[ 5] 5.00-6.00 sec 90.1 MBytes 755 Mbits/sec
[ 5] 6.00-7.00 sec 86.3 MBytes 725 Mbits/sec
[ 5] 7.00-8.00 sec 92.0 MBytes 771 Mbits/sec
[ 5] 8.00-9.00 sec 105 MBytes 881 Mbits/sec
[ 5] 9.00-10.00 sec 105 MBytes 878 Mbits/sec
[ 5] 10.00-10.04 sec 4.00 MBytes 881 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth
[ 5] 0.00-10.04 sec 0.00 Bytes 0.00 bits/sec sender
[ 5] 0.00-10.04 sec 941 MBytes 787 Mbits/sec receiver
====================
Thanks,
--
//////////////////////////////////////////////////////////////////////
Internet Initiative Japan Inc.
Device Engineering Section,
Product Development Department,
Product Division,
Technology Unit
Kengo NAKAHARA <k-nakah...@iij.ad.jp>
