寝る前に興味本位でやったのでRaspberry Pi Advent Calendar 2019の19日目です。
Raspberry Pi 3以降、無線LANが内蔵されて便利なりました（反面、認証が通るまでに3ヶ月から1年くらい待たされるようにもなりましたが）。3A+でも無線LANが内蔵されて、USB無線LANドングルに頼り場面は本当に減ってきましたね。なんだかんだでいい時代です。
そんな中引き出しからポロッとUSB3.0接続なGW-900Dが出てきまして、こいつをRaspberry Pi4につないだらどうなるんだろ？と思ったのでiperf3でベンチして比較してみました。GW-900DはRTL8812auなので、久しぶりにGithubからソースを持ってきてビルドして突っ込みました。ちゃんと動いてよかった。
無線LAN環境は色々古めかしく、Aterm WG-1800HP、先述のGW-900Dという感じで、11acはできるけどたぶん今の最新のドングルを使えばもっと早い気はしますが、まああり物でやっていきます。接続はどちらももちろん5GHz環境です。iperf先は有線LAN接続の自作機です。
内蔵無線LAN(5GHz接続)
平均は72Mbpsと、まあこんなもんかという感じでした。
$ iperf3 -c 192.168.29.106 Connecting to host 192.168.29.106, port 5201 [ 5] local 192.168.29.132 port 58020 connected to 192.168.29.106 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.00 sec 8.37 MBytes 70.2 Mbits/sec 0 146 KBytes [ 5] 1.00-2.00 sec 8.64 MBytes 72.5 Mbits/sec 0 160 KBytes [ 5] 2.00-3.00 sec 8.76 MBytes 73.5 Mbits/sec 0 178 KBytes [ 5] 3.00-4.00 sec 8.76 MBytes 73.5 Mbits/sec 0 178 KBytes [ 5] 4.00-5.00 sec 8.70 MBytes 73.0 Mbits/sec 0 178 KBytes [ 5] 5.00-6.00 sec 8.58 MBytes 71.9 Mbits/sec 0 178 KBytes [ 5] 6.00-7.00 sec 8.82 MBytes 74.0 Mbits/sec 0 178 KBytes [ 5] 7.00-8.00 sec 8.58 MBytes 71.9 Mbits/sec 0 178 KBytes [ 5] 8.00-9.00 sec 9.20 MBytes 77.1 Mbits/sec 0 281 KBytes [ 5] 9.00-10.00 sec 8.26 MBytes 69.3 Mbits/sec 0 281 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 86.7 MBytes 72.7 Mbits/sec 0 sender [ 5] 0.00-10.00 sec 86.1 MBytes 72.3 Mbits/sec receiver iperf Done.
GW-900D(USB3.0接続)
平均は240Mbpsと、約3倍となりました。が、USB3.0接続でもこのくらいということは、GW-900D側がボトルネックなんでしょうかね。
$ iperf3 -c 192.168.29.106 Connecting to host 192.168.29.106, port 5201 [ 5] local 192.168.29.139 port 56740 connected to 192.168.29.106 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.00 sec 27.0 MBytes 227 Mbits/sec 0 441 KBytes [ 5] 1.00-2.00 sec 28.5 MBytes 239 Mbits/sec 0 502 KBytes [ 5] 2.00-3.00 sec 27.7 MBytes 232 Mbits/sec 3 399 KBytes [ 5] 3.00-4.00 sec 27.4 MBytes 230 Mbits/sec 0 433 KBytes [ 5] 4.00-5.00 sec 29.1 MBytes 244 Mbits/sec 0 475 KBytes [ 5] 5.00-6.00 sec 29.8 MBytes 250 Mbits/sec 0 475 KBytes [ 5] 6.00-7.00 sec 28.2 MBytes 237 Mbits/sec 0 502 KBytes [ 5] 7.00-8.00 sec 30.2 MBytes 253 Mbits/sec 0 502 KBytes [ 5] 8.00-9.00 sec 28.4 MBytes 238 Mbits/sec 3 385 KBytes [ 5] 9.00-10.00 sec 29.2 MBytes 245 Mbits/sec 0 428 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 286 MBytes 240 Mbits/sec 6 sender [ 5] 0.00-10.00 sec 285 MBytes 239 Mbits/sec receiver iperf Done.
GW-900D(USB2.0接続)
平均247Mbpsになりました。USB2.0でも大体同じになってしまいましたね。
$ iperf3 -c 192.168.29.106 Connecting to host 192.168.29.106, port 5201 [ 5] local 192.168.29.139 port 56756 connected to 192.168.29.106 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.00 sec 29.7 MBytes 249 Mbits/sec 0 436 KBytes [ 5] 1.00-2.00 sec 29.1 MBytes 244 Mbits/sec 0 486 KBytes [ 5] 2.00-3.00 sec 30.3 MBytes 254 Mbits/sec 0 537 KBytes [ 5] 3.00-4.00 sec 29.3 MBytes 246 Mbits/sec 0 537 KBytes [ 5] 4.00-5.00 sec 29.1 MBytes 244 Mbits/sec 0 537 KBytes [ 5] 5.00-6.00 sec 29.5 MBytes 247 Mbits/sec 0 537 KBytes [ 5] 6.00-7.00 sec 29.7 MBytes 249 Mbits/sec 0 566 KBytes [ 5] 7.00-8.00 sec 29.6 MBytes 248 Mbits/sec 0 566 KBytes [ 5] 8.00-9.00 sec 30.2 MBytes 253 Mbits/sec 0 595 KBytes [ 5] 9.00-10.00 sec 28.3 MBytes 238 Mbits/sec 0 595 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 295 MBytes 247 Mbits/sec 0 sender [ 5] 0.00-10.00 sec 294 MBytes 247 Mbits/sec receiver
内蔵無線LAN(2.4GHz接続)
じゃあ2.4GHz接続のドングルとも比較したくなったのでまずは内蔵無線LANから取ってみます。平均53Mbps。
$ iperf3 -c 192.168.29.106 Connecting to host 192.168.29.106, port 5201 [ 5] local 192.168.29.132 port 58044 connected to 192.168.29.106 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.00 sec 5.51 MBytes 46.2 Mbits/sec 0 221 KBytes [ 5] 1.00-2.00 sec 6.40 MBytes 53.7 Mbits/sec 0 327 KBytes [ 5] 2.00-3.00 sec 6.52 MBytes 54.7 Mbits/sec 0 346 KBytes [ 5] 3.00-4.00 sec 6.40 MBytes 53.7 Mbits/sec 0 348 KBytes [ 5] 4.00-5.00 sec 6.40 MBytes 53.7 Mbits/sec 0 348 KBytes [ 5] 5.00-6.00 sec 6.15 MBytes 51.6 Mbits/sec 0 366 KBytes [ 5] 6.00-7.00 sec 6.28 MBytes 52.6 Mbits/sec 0 385 KBytes [ 5] 7.00-8.00 sec 5.84 MBytes 49.0 Mbits/sec 0 385 KBytes [ 5] 8.00-9.00 sec 6.71 MBytes 56.3 Mbits/sec 0 406 KBytes [ 5] 9.00-10.00 sec 6.90 MBytes 57.9 Mbits/sec 0 508 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 63.1 MBytes 52.9 Mbits/sec 0 sender [ 5] 0.00-10.00 sec 61.8 MBytes 51.8 Mbits/sec receiver iperf Done.
バッファロー WLI-UC-GNM(USB3.0接続)
バッファローのめちゃクソ熱くなるやつといえば分かる人もいるかも知れないあいつです。平均は40Mbpsほど。お、思ったより出ないですね。ちなみにドライバーはrt2800usbでRalinkでした。あれ、蟹じゃなかったんだっけ。
$ iperf3 -c 192.168.29.106 Connecting to host 192.168.29.106, port 5201 [ 5] local 192.168.29.121 port 33406 connected to 192.168.29.106 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.00 sec 5.19 MBytes 43.5 Mbits/sec 0 308 KBytes [ 5] 1.00-2.00 sec 5.28 MBytes 44.3 Mbits/sec 0 503 KBytes [ 5] 2.00-3.00 sec 4.16 MBytes 34.9 Mbits/sec 0 679 KBytes [ 5] 3.00-4.00 sec 5.16 MBytes 43.3 Mbits/sec 0 820 KBytes [ 5] 4.00-5.00 sec 5.53 MBytes 46.4 Mbits/sec 0 1.03 MBytes [ 5] 5.00-6.00 sec 4.85 MBytes 40.7 Mbits/sec 0 1.24 MBytes [ 5] 6.00-7.00 sec 3.75 MBytes 31.4 Mbits/sec 0 1.36 MBytes [ 5] 7.00-8.00 sec 3.75 MBytes 31.5 Mbits/sec 0 1.52 MBytes [ 5] 8.00-9.00 sec 5.00 MBytes 42.0 Mbits/sec 0 1.74 MBytes [ 5] 9.00-10.00 sec 5.00 MBytes 41.9 Mbits/sec 0 1.90 MBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 47.7 MBytes 40.0 Mbits/sec 0 sender [ 5] 0.00-10.00 sec 45.5 MBytes 38.2 Mbits/sec receiver iperf Done.
