1). 簡介
NXP iMX8已經(jīng)正式發(fā)布，相較于之前NXP i.MX系列的主力產(chǎn)品iMX6，其性能有了大幅提升，本文就針對網(wǎng)絡(luò)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(diào)試串口UART1（載板X29）到開發(fā)主機方便調(diào)試。更多關(guān)于Apalis iMX8配合Apalis evaluation Board載板的說明請參考Datasheet和開發(fā)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(diào)試串口UART1（載板X29）到開發(fā)主機方便調(diào)試。更多關(guān)于Apalis iMX6配合Apalis evaluation Board載板的說明請參考Datasheet和開發(fā)上手指南。
c). Ubuntu linux PC主機， 用于分別和Apalis iMX8、Apalis iMX6進行收發(fā)測試。
d). 測試工具軟件使用 iperf3 工具，Toradex Linux demo image里面已經(jīng)默認集成，Ubuntu 系統(tǒng)（這里以18.04為例）要通過apt命令來安裝iperf3
----------------------
$ sudo apt update
$ sudo apt install iperf3
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e). 網(wǎng)絡(luò)連接拓撲為Apalis iMX8QM、Apalis iMX6Q以及Ubuntu PC都通過千兆有線網(wǎng)絡(luò)連接到同一個局域網(wǎng)。
3). TCP網(wǎng)絡(luò)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(fā)送測試
./ Apalis iMX6Q/Apalis iMX8QM Server端運行下面命令
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$ 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(fā)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(jié)果匯總
項目 | TCP發(fā)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(wǎng)絡(luò)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(fā)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(fā)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(jié)果匯總
| UDP發(fā)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(jīng)到1%左右
5). 總結(jié)
本文對比測試了NXP iMX6和NXP iMX8處理器的網(wǎng)絡(luò)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(shù)情況下能夠接近千兆帶寬。
