iperf3跑满100G网卡实测记录

环境准备

拓扑

两台服务器 100G网卡对插直连。

ubuntu20.04, 系统设置默认状态

MTU 1500

网卡

Mellonax ConnectX5 100G

root@vnet:~# lspci | grep Mellanox
98:00.0 Ethernet controller: Mellanox Technologies MT27800 Family [ConnectX-5]
98:00.1 Ethernet controller: Mellanox Technologies MT27800 Family [ConnectX-5]

设置为以太网模式

#mlxconfig -d /dev/mst/mt4119_pciconf0 set LINK_TYPE_P1=2
root@vnet:~#  mlxconfig -d /dev/mst/mt4119_pciconf0 q |grep  LINK_TYPE_P
         LINK_TYPE_P1                                ETH(2)          
         LINK_TYPE_P2                                ETH(2) 

测试

服务端

三个窗口分别开3个iperf3 server

iperf3 -s -p 5200
iperf3 -s -p 5201
iperf3 -s -p 5202

客户端

三个窗口分别同时开3个iperf3 client,跑10分钟

iperf3 -c 10.0.0.1 -p 5200 -t 600
iperf3 -c 10.0.0.1 -p 5201 -t 600
iperf3 -c 10.0.0.1 -p 5202 -t 600

iperf3结果

三个iperf3 Client, 合并速率大约 92GB/s

第一个

root@vnet:~# iperf3 -c 10.0.0.1 -p 5200 -t 600
Connecting to host 10.0.0.1, port 5200
[  5] local 10.0.0.2 port 39104 connected to 10.0.0.1 port 5200
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  5.70 GBytes  49.0 Gbits/sec  639   2.82 MBytes       
[  5]   1.00-2.00   sec  3.82 GBytes  32.8 Gbits/sec    0   2.82 MBytes       
[  5]   2.00-3.00   sec  3.65 GBytes  31.4 Gbits/sec    0   2.82 MBytes       
[  5]   3.00-4.00   sec  3.65 GBytes  31.4 Gbits/sec    0   2.82 MBytes       
[  5]   4.00-5.00   sec  3.70 GBytes  31.8 Gbits/sec    0   2.83 MBytes       
[  5]   5.00-6.00   sec  3.71 GBytes  31.8 Gbits/sec    0   2.83 MBytes       
[  5]   6.00-7.00   sec  3.66 GBytes  31.4 Gbits/sec    0   2.83 MBytes       
[  5]   7.00-8.00   sec  3.65 GBytes  31.4 Gbits/sec    0   2.85 MBytes       
[  5]   8.00-9.00   sec  3.65 GBytes  31.4 Gbits/sec    0   2.85 MBytes       
[  5]   9.00-10.00  sec  3.65 GBytes  31.4 Gbits/sec    0   2.89 MBytes       
...
[  5] 594.00-595.00 sec  3.65 GBytes  31.4 Gbits/sec    0   2.81 MBytes       
[  5] 595.00-596.00 sec  3.65 GBytes  31.4 Gbits/sec    0   2.81 MBytes       
[  5] 596.00-597.00 sec  3.65 GBytes  31.4 Gbits/sec    0   2.95 MBytes       
[  5] 597.00-598.00 sec  3.65 GBytes  31.4 Gbits/sec    0   2.95 MBytes       
[  5] 598.00-599.00 sec  3.65 GBytes  31.4 Gbits/sec    0   2.95 MBytes       
[  5] 599.00-600.00 sec  3.65 GBytes  31.4 Gbits/sec    0   2.95 MBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-600.00 sec  2.14 TBytes  31.4 Gbits/sec  7061             sender
[  5]   0.00-600.00 sec  2.14 TBytes  31.4 Gbits/sec                  receiver

第二个

root@vnet:~# iperf3 -c 10.0.0.1 -p 5201 -t 600
Connecting to host 10.0.0.1, port 5201
[  5] local 10.0.0.2 port 42866 connected to 10.0.0.1 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  4.76 GBytes  40.9 Gbits/sec    3   2.72 MBytes       
[  5]   1.00-2.00   sec  3.71 GBytes  31.9 Gbits/sec    0   2.72 MBytes       
[  5]   2.00-3.00   sec  3.65 GBytes  31.4 Gbits/sec    0   2.72 MBytes       
[  5]   3.00-4.00   sec  3.61 GBytes  31.0 Gbits/sec    0   2.72 MBytes       
[  5]   4.00-5.00   sec  3.55 GBytes  30.5 Gbits/sec    0   2.72 MBytes       
[  5]   5.00-6.00   sec  3.59 GBytes  30.8 Gbits/sec    0   2.72 MBytes       
[  5]   6.00-7.00   sec  3.65 GBytes  31.3 Gbits/sec    0   3.21 MBytes       
[  5]   7.00-8.00   sec  3.65 GBytes  31.3 Gbits/sec    0   3.21 MBytes       
[  5]   8.00-9.00   sec  3.65 GBytes  31.3 Gbits/sec    0   3.21 MBytes       
[  5]   9.00-10.00  sec  3.65 GBytes  31.3 Gbits/sec    0   3.21 MBytes       
[  5]  10.00-11.00  sec  3.65 GBytes  31.3 Gbits/sec    0   3.21 MBytes     
...
[  5] 594.00-595.00 sec  3.65 GBytes  31.4 Gbits/sec    0   4.76 MBytes       
[  5] 595.00-596.00 sec  3.65 GBytes  31.4 Gbits/sec    0   4.76 MBytes       
[  5] 596.00-597.00 sec  3.65 GBytes  31.4 Gbits/sec    0   4.76 MBytes       
[  5] 597.00-598.00 sec  3.65 GBytes  31.4 Gbits/sec    0   4.76 MBytes       
[  5] 598.00-599.00 sec  3.65 GBytes  31.4 Gbits/sec    0   4.76 MBytes       
[  5] 599.00-600.00 sec  4.24 GBytes  36.4 Gbits/sec    0   4.76 MBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-600.00 sec  2.14 TBytes  31.4 Gbits/sec  270             sender
[  5]   0.00-600.00 sec  2.14 TBytes  31.4 Gbits/sec                  receiver

第三个

root@vnet:~# iperf3 -c 10.0.0.1 -p 5202 -t 600 
Connecting to host 10.0.0.1, port 5202
[  5] local 10.0.0.2 port 33730 connected to 10.0.0.1 port 5202
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  3.30 GBytes  28.4 Gbits/sec    0   1.76 MBytes       
[  5]   1.00-2.00   sec  3.65 GBytes  31.4 Gbits/sec    0   1.85 MBytes       
[  5]   2.00-3.00   sec  3.65 GBytes  31.4 Gbits/sec    0   1.85 MBytes       
[  5]   3.00-4.00   sec  3.70 GBytes  31.8 Gbits/sec    0   1.85 MBytes       
[  5]   4.00-5.00   sec  3.71 GBytes  31.8 Gbits/sec    0   1.85 MBytes       
[  5]   5.00-6.00   sec  3.66 GBytes  31.5 Gbits/sec    0   1.85 MBytes       
[  5]   6.00-7.00   sec  3.66 GBytes  31.4 Gbits/sec    0   1.85 MBytes       
[  5]   7.00-8.00   sec  3.66 GBytes  31.4 Gbits/sec    0   1.97 MBytes       
[  5]   8.00-9.00   sec  3.66 GBytes  31.4 Gbits/sec    0   1.97 MBytes       
[  5]   9.00-10.00  sec  3.66 GBytes  31.4 Gbits/sec    0   1.97 MBytes       
[  5]  10.00-11.00  sec  3.66 GBytes  31.4 Gbits/sec   50   1.53 MBytes 
...
[  5] 590.00-591.00 sec  3.65 GBytes  31.4 Gbits/sec    0   2.07 MBytes       
[  5] 591.00-592.00 sec  3.65 GBytes  31.4 Gbits/sec    0   2.07 MBytes       
[  5] 592.00-593.00 sec  3.65 GBytes  31.4 Gbits/sec    0   2.07 MBytes       
[  5] 593.00-594.00 sec  3.65 GBytes  31.4 Gbits/sec    0   2.07 MBytes       
[  5] 594.00-595.00 sec  3.65 GBytes  31.4 Gbits/sec    0   2.07 MBytes       
[  5] 595.00-596.00 sec  3.65 GBytes  31.4 Gbits/sec    0   2.07 MBytes       
[  5] 596.00-597.00 sec  3.65 GBytes  31.4 Gbits/sec    0   2.07 MBytes       
[  5] 597.00-598.00 sec  3.65 GBytes  31.4 Gbits/sec    0   2.07 MBytes       
[  5] 598.00-599.00 sec  3.65 GBytes  31.4 Gbits/sec    0   2.07 MBytes       
[  5] 599.00-600.00 sec  6.34 GBytes  54.4 Gbits/sec  715    824 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-600.00 sec  2.15 TBytes  31.5 Gbits/sec  12151             sender
[  5]   0.00-600.00 sec  2.15 TBytes  31.5 Gbits/sec                  receiver

接口速率

iperf3跑满100G网卡实测记录_第1张图片

其中发送速率12016406,基本稳定在1200000 KB/s以上

Trans KB/s Trans Kbps Trans Mbps Trans Gbps
12016406 96131248 96131.248 96.131248

Kpbs 与 KB/s换算关系是 x8。

Kbps Mbps Gbps换算倍数是 1000。

CPU占用

客户端

top - 07:48:53 up 5 min,  6 users,  load average: 0.61, 0.24, 0.10
Tasks: 765 total,   2 running, 763 sleeping,   0 stopped,   0 zombie
%Cpu(s):  0.0 us,  1.5 sy,  0.0 ni, 98.4 id,  0.0 wa,  0.0 hi,  0.1 si,  0.0 st
MiB Mem : 515430.8 total, 250782.5 free, 263932.7 used,    715.5 buff/cache
MiB Swap:   8192.0 total,   8192.0 free,      0.0 used. 249515.3 avail Mem 

    PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND                                                                                     
   3394 root      20   0    5900   3184   2760 R  34.9   0.0   0:06.79 iperf3                                                                                      
   3393 root      20   0    5900   3100   2676 S  33.9   0.0   0:07.63 iperf3                                                                                      
   3392 root      20   0    5900   3188   2764 S  33.2   0.0   0:07.17 iperf3 

服务端

Tasks: 622 total,   3 running, 249 sleeping,   0 stopped,   0 zombie
%Cpu(s):  0.0 us,  2.3 sy,  0.0 ni, 97.1 id,  0.0 wa,  0.0 hi,  0.6 si,  0.0 st
KiB Mem : 52781030+total, 48375638+free, 43817464 used,   236448 buff/cache
KiB Swap:  4194300 total,  4194300 free,        0 used. 48168425+avail Mem 

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND                                                                                        
 3216 root      20   0    9752   2316   2064 R  67.4  0.0   0:32.56 iperf3                                                                                         
 3143 root      20   0    9884   2408   2148 S  59.5  0.0   7:45.59 iperf3                                                                                         
 3176 root      20   0    9884   2352   2096 R  55.8  0.0   6:41.01 iperf3  

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