Linux / Windows – NTttcp

通常在 Linux 環境下會使用 iperf – https://benjr.tw/462 來當作測試網路效能工具,在 Windows 環境下 iperf 也有提供相對應的版本.

不過在 Microsoft 網站提到在 Azure 下建議使用 NTttcp 當作網路頻寬測試工具.
https://docs.microsoft.com/zh-tw/azure/virtual-network/virtual-network-bandwidth-testing

Amazon 的 AWS 文章也是建議使用 NTttcp.
https://aws.amazon.com/tw/premiumsupport/knowledge-center/network-throughput-benchmark-windows-ec2/

來看看這 NTttcp 如何使用.
測試環境 (虛擬機)

• Windows 2012 R2 x86_64 – IP : 192.168.95.149
• Ubuntu 16.04 x86_64 – IP 192.168.95.151

Windows

下載點 https://gallery.technet.microsoft.com/NTttcp-Version-528-Now-f8b12769 安裝就不說明了.

解開後建議存放在 c:\NTttcp” 資料夾,如果有設定 Windows 防火牆,需打開 NTttcp 權限.
下面設定防火牆指令需要有 administrator 權限,可以透過 command prompt (admin).

C:\Windows\system32>netsh advfirewall firewall add rule program=c:\NTttcp\amd64fre\ntttcp.exe name="ntttcp" protocol=any dir=in action=allow enable=yes profile=ANY
Ok.

Linux

NTttcp 屬於 opensource 由 Windows 開發,透過 clone 就可以從 https://github.com 下載.

root@ubuntu:~# apt-get -y install build-essential 
root@ubuntu:~# apt-get -y install git
root@ubuntu:~# git clone https://github.com/Microsoft/ntttcp-for-linux
root@ubuntu:~# cd ntttcp-for-linux/src
root@ubuntu:~/ntttcp-for-linux/src#  make && make install

如果是 CentOS 則需要透過 yum 下載 gcc 與 git 套件才能安裝.

Windows < Linux

Windows (Receiver)

c:\NTttcp\amd64fre>NTttcp.exe -r -m 1,0,192.168.95.149
Copyright Version 5.33

使用參數:

• -r
  當作接收端 (receiver).
• -m <mappings>
  mapping 需要三個參數 1. session count (連線數), 2. processor number(指定使用哪一個處理器來進行封包處理), 3. receiver address or name (接收端的 IP)
  範例: -m 4,0,1.2.3.4 表示為
  • 4 – 表示使用 4 個連線數 (sessions).
  • 0 – 表示使用所有的處理器.
  • 1.2.3.4 – 表示接收端的 IP.

Linux (Sender)

root@ubuntu:~# ntttcp -s -m 1,0,192.168.95.149 -N -t 30
NTTTCP for Linux 1.3.4
---------------------------------------------------------
12:15:49 INFO: main: set cpu affinity
12:15:49 INFO: Starting sender activity (no sync) ...
12:15:49 INFO: 1 threads created
12:16:19 INFO: Test run completed.
12:16:19 INFO: Test cycle finished.
12:16:20 INFO: 1 connections tested
12:16:20 INFO: #####  Totals:  #####
12:16:20 INFO: test duration    :30.01 seconds
12:16:20 INFO: total bytes      :303584
12:16:20 INFO: throughput       :80.93Kbps
12:16:20 INFO: cpu cores        :2
12:16:20 INFO: cpu speed        :2294.870MHz
12:16:20 INFO: user             :0.41%
12:16:20 INFO: system           :0.68%
12:16:20 INFO: idle             :98.89%
12:16:20 INFO: iowait           :0.00%
12:16:20 INFO: softirq          :0.02%
12:16:20 INFO: cycles/byte      :5028.13
12:16:20 INFO: cpu busy (all)   :4.11%
---------------------------------------------------------

使用參數:

• -s
  當作傳送端 (Sender).
• -m <mappings>
  mapping 需要三個參數 1. session count (連線數), 2. processor number(指定使用哪一個處理器來進行封包處理), 3. receiver address or name (接收端的 IP)
• -t <Runtime>
  測試時間(單位為秒)
• -N
  啟用非同步模式, Linux 使用 -N 而 Windows 使用 -ns 參數.

Windows > Linux

和剛剛測試差不多,需要注意的是 IP 變成 Linux (Receiver) , Windows 需要加 -ns (非同步模式).
Linux (Receiver)

root@ubuntu:~# ntttcp -r -m 1,0,192.168.95.151
NTTTCP for Linux 1.3.4
---------------------------------------------------------
16:30:43 INFO: main: set cpu affinity
16:30:43 INFO: 2 threads created

Windows (Sender)

c:\NTttcp\amd64fre>NTttcp.exe -s -m 1,0,192.168.95.151 -ns -t 30
Copyright Version 5.33
Network activity progressing...

Thread  Time(s) Throughput(KB/s) Avg B / Compl
======  ======= ================ =============
     0   30.005        92340.877     65536.000

#####  Totals:  #####

   Bytes(MEG)    realtime(s) Avg Frame Size Throughput(MB/s)
================ =========== ============== ================
     2705.750000      30.005       1456.356           90.177

Throughput(Buffers/s) Cycles/Byte       Buffers
===================== =========== =============
             1442.826      22.975     43292.000

DPCs(count/s) Pkts(num/DPC)   Intr(count/s) Pkts(num/intr)
============= ============= =============== ==============
     2223.829         1.347        3955.174          0.758

Packets Sent Packets Received Retransmits Errors Avg. CPU %
============ ================ =========== ====== ==========
     1948140            89900           0      0     94.620

其他參數:
-l <Length of buffer> [default TCP: 64K, UDP: 128]
-n <Number of buffers> [default: 20K]
-p <port base> [default: 5001]
-sp Synchronize data ports, if used -p must be same on every instance.
-to <timeout> in milliseconds. [default: 600000]
-a <outstanding I/O> [default: 2]
-rb <Receive buffer size> [default: -1]
-sb <Send buffer size> , default: 0 with -a; 8K otherwise
-ndl set TCP_NODELAY socket option
-u UDP send / recv
-w WSARecv / WSASend
-d Verify Flag
-cd <Cool-down> in seconds
-wu <Warm-up> in seconds
-v enable verbose mode
-6 enable IPv6 mode
-wa Sets the WAIT_ALL flag when using recv or WSARecv functions
-nic <NIC IP> Use NIC with <NIC IP> for sending data (sender only).
-xml [filename] save XML output to a file, by default saves to xml.txt