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標題: RTX 與 Windows 以太網(wǎng)性能分析 [打印本頁(yè)]
作者: trueleven    時(shí)間: 2018-1-11 17:35
標題: RTX 與 Windows 以太網(wǎng)性能分析
RTX 下使用普通網(wǎng)卡即可實(shí)現實(shí)時(shí)以太網(wǎng)的性能。作者對 RTX 與 Windows 下以太網(wǎng)性能進(jìn)行了對比測試來(lái)驗證該觀(guān)點(diǎn)。

1. 測試環(huán)境
       Windows XP 操作系統, RTX 使用Dedicated 模式, 單獨占用一顆 CPU 核, 硬件使用 Core i7, 4 核8 線(xiàn)程, 2.8GHz 主頻, 4GB 內存, 兩塊 Intel 82545GM 千兆網(wǎng)卡點(diǎn)對點(diǎn)互聯(lián)。

2. 測試方法
       RTX 環(huán)境下, 測試方法為兩臺機器分別運行RT Client 和 RT Server 兩個(gè) RTSS 應用程序, RT Client 發(fā)送數據包到 RT Server, RT Server 收到數據包之后發(fā)送回 RT Client。使用 TCP/IP & UDP 協(xié)議, 選擇不同的包長(cháng)度, 每次發(fā)送500 個(gè)數據包, 重復 20 次Windows 環(huán)境下, 兩臺機器分別運行 Client 和 Server 兩個(gè)應用程序, Client 發(fā)送數據包到 Server, Server 收到數據包之后發(fā)送回 Client。使用 TCP/IP & UDP 協(xié)議, 選擇不同的包長(cháng)度, 每次發(fā)送500 個(gè)數據包, 重復 20 次。

3. 測試結果
RTX 環(huán)境, TCP/IP 協(xié)議測試結果Windows 環(huán)境, TCP/IP 協(xié)議測試結果
Packet Size = 1 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 35 us
Maximum Time = 54 us
Errors = 0
Lost Packets = 0		--
Packet Size = 16 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 36 us
Maximum Time = 55 us
Errors = 0
Lost Packets = 0		Packet Size = 16 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 55 us
Maximum Time = 199 us
Errors = 0
Lost Packets = 0
Packet Size = 32 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 37 us
Maximum Time = 54 us
Errors = 0
Lost Packets = 0		Packet Size = 32 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 58 us
Maximum Time = 196 us
Errors = 0
Lost Packets = 0
Packet Size = 64 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 39 us
Maximum Time = 51 us
Errors = 0
Lost Packets = 0
Packet Size = 64 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 58 us
Maximum Time = 3400 us
Errors = 0
Lost Packets = 0
Packet Size = 128 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 42 us
Maximum Time = 59 us
Errors = 0
Lost Packets = 0		Packet Size = 128 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 55 us
Maximum Time = 166 us
Errors = 0
Lost Packets = 0
Packet Size = 256 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 50 us
Maximum Time = 71 us
Errors = 0
Lost Packets = 0		Packet Size = 256 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 79 us
Maximum Time = 653 us
Errors = 0
Lost Packets = 0
Packet Size = 512 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 64 us
Maximum Time = 92 us
Errors = 0
Lost Packets = 0		Packet Size = 512 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 122 us
Maximum Time = 495 us
Errors = 0
Lost Packets = 0
Packet Size = 1024 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 92 us
Maximum Time = 111 us
Errors = 0
Lost Packets = 0		Packet Size = 1024 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 212 us
Maximum Time = 716 us
Errors = 0
Lost Packets = 0
Packet Size = 1462 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 117 us
Maximum Time = 633 us
Errors = 0
Lost Packets = 0		--
Packet Size = 2048 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 124 us
Maximum Time = 632 us
Errors = 0
Lost Packets = 0
Packet Size = 2048 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 165 us
Maximum Time = 709 us
Errors = 0
Lost Packets = 0
Packet Size = 4096 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 188 us
Maximum Time = 695 us
Errors = 0
Lost Packets = 0		Packet Size = 4096 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 232 us
Maximum Time = 565 us
Errors = 0
Lost Packets = 0
Packet Size = 8192 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 289 us
Maximum Time = 1083 us
Errors = 0
Lost Packets = 0		Packet Size = 8192 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 348 us
Maximum Time = 946 us
Errors = 0
Lost Packets = 0
Packet Size = 65535 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 1643 us
Maximum Time = 2707 us
Errors = 0
Lost Packets = 0		Packet Size = 65535 bytes
Connections = 1
Messages / Connection = 10000
Minimum Time = 2244 us
Maximum Time = 2591 us
Errors = 0
Lost Packets = 0

4 測試數據分析
       使用 TCP/IP 協(xié)議, 當傳輸的數據包長(cháng)度低于1460 上限時(shí), RTX 下數據包傳輸的實(shí)時(shí)性明顯優(yōu)于 Windows 。當傳輸數據包長(cháng)度超過(guò) 1460 上限的大包時(shí), RTX 在應用層分包, Windows 下在 IP 層自動(dòng)分包。由于 TCP 協(xié)議數據傳輸的可靠性要求, RTX 下大數據包需要接收多次數據包 ACK 報文, RTX 下數據包傳輸的實(shí)時(shí)性與 Windows 相當。使用 UDP 協(xié)議傳輸時(shí), 由于 UDP 協(xié)議不需要數據包ACK 報文, RTX 實(shí)時(shí)性得以體現, RTX 下數據包傳輸的實(shí)時(shí)性明顯優(yōu)于 Windows 。
5 結論
1）使用 TCP/IP 協(xié)議, 相比于 Windows, RTX 在傳輸小包(數據包長(cháng)度低于 1460) 時(shí)有明顯的實(shí)時(shí)性。
2）使用 UDP 協(xié)議, 相比于 Windows, RTX 在數據包傳輸時(shí)有明顯的實(shí)時(shí)性。





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