發布日期：2022-05-30 點擊率：258
摘要：NXP iMX8已經正式發布，相較于之前NXP i.MX系列的主力產品iMX6，其性能有了大幅提升，本文就針對網絡接口對NXP iMX8和iMX6兩款ARM處理器進行對比測試。
1). 簡介
NXP iMX8已經正式發布，相較于之前NXP i.MX系列的主力產品iMX6，其性能有了大幅提升，本文就針對網絡接口對NXP iMX8和iMX6兩款ARM處理器進行對比測試。
本文演示所使用的ARM平臺來自Toradex基于NXP iMX8 SoC的Apalis iMX8 ARM核心板和基于NXP iMX6Q SoC的Apalis iMX6 ARM核心板。
2). 準備
a). Apalis iMX8QM ARM核心版配合Apalis evaluation Board載板，Apalis iMX8QM安裝Toradex V3.0b2 Linux demo image，同時連接調試串口UART1（載板X29）到開發主機方便調試。更多關于Apalis iMX8配合Apalis evaluation Board載板的說明請參考Datasheet和開發上手指南。
b). Apalis iMX6Q ARM核心版配合Apalis evaluation Board載板，Apalis iMX6Q安裝Toradex V2.8 Linux demo image，同時連接調試串口UART1（載板X29）到開發主機方便調試。更多關于Apalis iMX6配合Apalis evaluation Board載板的說明請參考Datasheet和開發上手指南。
c). Ubuntu linux PC主機， 用于分別和Apalis iMX8、Apalis iMX6進行收發測試。
d). 測試工具軟件使用 iperf3 工具，Toradex Linux demo image里面已經默認集成，Ubuntu 系統（這里以18.04為例）要通過apt命令來安裝iperf3
----------------------
$ sudo apt update
$ sudo apt install iperf3
----------------------
e). 網絡連接拓撲為Apalis iMX8QM、Apalis iMX6Q以及Ubuntu PC都通過千兆有線網絡連接到同一個局域網。
3). TCP網絡傳輸性能測試對比
a). Apalis iMX6Q/Apalis iMX8QM作為Server端接收，Ubuntu PC作為Client端發送測試
./ Apalis iMX6Q/Apalis iMX8QM Server端運行下面命令
----------------------
$ iperf3 -s
----------------------
./ Apalis iMX6Q
----------------------
$ iperf3 -c [IP of Apalis iMX6Q] -t 60 -i 10 -w 300K
…
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-60.00 sec 4.01 GBytes 574 Mbits/sec 1 sender
[ 4] 0.00-60.00 sec 4.01 GBytes 574 Mbits/sec receiver
----------------------
./ Apalis iMX8QM
----------------------
$ iperf3 -c [IP of Apalis iMX8QM] -t 60 -i 10
…
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-60.00 sec 6.52 GBytes 934 Mbits/sec 0 sender
[ 4] 0.00-60.00 sec 6.52 GBytes 934 Mbits/sec receiver
----------------------
b). Apalis iMX6Q/Apalis iMX8QM作為Client端發送，Ubuntu PC作為Sever端接收測試
./ Ubuntu PC server端運行下面命令
----------------------
$ iperf3 -s
----------------------
./ Apalis iMX6Q Client端連接測試
----------------------
root@apalis-imx6:~# iperf3 -c [IP of Ubuntu PC] -t 60 -i 10
…
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-60.00 sec 2.84 GBytes 406 Mbits/sec 0 sender
[ 5] 0.00-60.00 sec 2.84 GBytes 406 Mbits/sec receiver
----------------------
./ Apalis iMX8QM Client端連接測試
----------------------
root@apalis-imx8:~# iperf3 -c [IP of Ubuntu PC] -t 60 -i 10
…
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-60.00 sec 6.39 GBytes 915 Mbits/sec 0 sender
[ 5] 0.00-60.00 sec 6.39 GBytes 915 Mbits/sec receiver
----------------------
c). 測試結果匯總
項目 | TCP發送測試 | TCP接收測試 |
Apalis iMX6Q | 406 Mb/s | 574 Mb/s |
Apalis iMX8QM | 915 Mb/s | 934 Mb/s |
4). UDP網絡傳輸性能測試對比
a). Apalis iMX6Q/Apalis iMX8QM作為Server端接收，Ubuntu PC作為Client端發送測試
./ Apalis iMX6Q/Apalis iMX8QM Server端運行下面命令
----------------------
$ iperf3 -s
----------------------
./ Apalis iMX6Q
----------------------
$ iperf3 -c [IP of Apalis iMX6Q] -u -b 100M -t 60 -i 10
…
[ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams
[ 4] 0.00-60.00 sec 714 MBytes 99.9 Mbits/sec 0.110 ms 0/91424 (0%)
$ iperf3 -c [IP of Apalis iMX6Q] -u -b 400M -t 60 -i 10
…
[ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams
[ 4] 0.00-60.00 sec 2.79 GBytes 400 Mbits/sec 0.098 ms 4374/365993 (1.2%)
$ iperf3 -c [IP of Apalis iMX6Q] -u -b 1000M -t 60 -i 10
…
[ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams
[ 4] 0.00-60.00 sec 2.98 GBytes 426 Mbits/sec 0.167 ms 2304/390206 (0.59%)
----------------------
./ Apalis iMX8QM
----------------------
$ iperf3 -c [IP of Apalis iMX8QM] -u -b 100M -t 60 -i 10
…
[ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams
[ 4] 0.00-60.00 sec 714 MBytes 99.9 Mbits/sec 0.078 ms 84/91416 (0.092%)
$ iperf3 -c [IP of Apalis iMX8QM] -u -b 400M -t 60 -i 10
…
[ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams
[ 4] 0.00-60.00 sec 2.79 GBytes 400 Mbits/sec 0.092 ms 121/366076 (0.033%)
$ iperf3 -c [IP of Apalis iMX8QM] -u -b 1000M -t 60 -i 10
…
[ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams
[ 4] 0.00-60.00 sec 6.63 GBytes 949 Mbits/sec 0.064 ms 284/868752 (0.033%)
----------------------
b). Apalis iMX6Q/Apalis iMX8QM作為Client端發送，Ubuntu PC作為Sever端接收測試
./ Ubuntu PC server端運行下面命令
----------------------
$ iperf3 -s
----------------------
./ Apalis iMX6Q Client端連接測試
----------------------
root@apalis-imx6:~# iperf3 -c [IP of Ubuntu PC] -u -b 100M -t 60 -i 10
…
[ ID] Interval Transfer Bitrate Jitter Lost/Total Datagrams
[ 5] 0.00-60.00 sec 715 MBytes 100 Mbits/sec 0.000 ms 0/517952 (0%) sender
[ 5] 0.00-60.00 sec 715 MBytes 100 Mbits/sec 0.005 ms 0/517952 (0%) receiver
root@apalis-imx6:~# iperf3 -c [IP of Ubuntu PC] -u -b 400M -t 60 -i 10
…
[ ID] Interval Transfer Bitrate Jitter Lost/Total Datagrams
[ 5] 0.00-60.00 sec 1.91 GBytes 273 Mbits/sec 0.000 ms 0/1413705 (0%) sender
[ 5] 0.00-60.00 sec 1.91 GBytes 273 Mbits/sec 0.021 ms 0/1413705 (0%) receiver
root@apalis-imx6:~# iperf3 -c [IP of Ubuntu PC] -u -b 1000M -t 60 -i 10
…
[ ID] Interval Transfer Bitrate Jitter Lost/Total Datagrams
[ 5] 0.00-60.00 sec 1.92 GBytes 274 Mbits/sec 0.000 ms 0/1421514 (0%) sender
[ 5] 0.00-60.00 sec 1.92 GBytes 274 Mbits/sec 0.057 ms 0/1421509 (0%) receiver
----------------------
./ Apalis iMX8QM Client端連接測試
----------------------
root@apalis-imx8:~# iperf3 -c [IP of Ubuntu PC] -u -b 100M -t 60 -i 10
…
[ ID] Interval Transfer Bitrate Jitter Lost/Total Datagrams
[ 5] 0.00-60.00 sec 715 MBytes 100 Mbits/sec 0.000 ms 0/517950 (0%) sender
[ 5] 0.00-60.00 sec 715 MBytes 100 Mbits/sec 0.035 ms 0/517950 (0%) receiver
root@apalis-imx8:~# iperf3 -c 10.20.1.126 -u -b 400M -t 60 -i 10
…
[ ID] Interval Transfer Bitrate Jitter Lost/Total Datagrams
[ 5] 0.00-60.00 sec 2.79 GBytes 400 Mbits/sec 0.000 ms 0/2071798 (0%) sender
[ 5] 0.00-60.00 sec 2.79 GBytes 400 Mbits/sec 0.026 ms 68/2071798 (0.0033%) receiver
root@apalis-imx8:~# iperf3 -c 10.20.1.126 -u -b 1000M -t 60 -i 10
…
[ ID] Interval Transfer Bitrate Jitter Lost/Total Datagrams
[ 5] 0.00-60.00 sec 4.71 GBytes 674 Mbits/sec 0.000 ms 0/3489592 (0%) sender
[ 5] 0.00-60.00 sec 4.71 GBytes 674 Mbits/sec 0.030 ms 103/3489586 (0.003%) receiver
----------------------
c). 測試結果匯總
UDP發送測試 | UDP接收測試 | |||||
100M帶寬 | 400M帶寬 | 1000M帶寬 | 100M帶寬 | 400M帶寬 | 1000M帶寬 | |
Apalis iMX6Q | 100 Mb/s | 273 Mb/s | 274 Mb/s | 99.9 Mb/s | 400 Mb/s * | 426 Mb/s * |
Apalis iMX8QM | 100 Mb/s | 400 Mb/s | 674 Mb/s | 99.9 Mb/s | 400 Mb/s | 949 Mb/s |
* 注意此時丟包率已經到1%左右
5). 總結
本文對比測試了NXP iMX6和NXP iMX8處理器的網絡性能，對于iMX6，由于這個Eratta的限制，400Mb/s左右的性能也就把符合文檔的描述，iMX8則在大多數情況下能夠接近千兆帶寬。
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