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標(biāo)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(biāo)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(xiàn)實(shí)時(shí)以太網(wǎng)的性能。作者對(duì) RTX 與 Windows 下以太網(wǎng)性能進(jìn)行了對(duì)比測(cè)試來(lái)驗(yàn)證該觀點(diǎn)。

1. 測(cè)試環(huán)境
       Windows XP 操作系統(tǒng), RTX 使用Dedicated 模式, 單獨(dú)占用一顆 CPU 核, 硬件使用 Core i7, 4 核8 線程, 2.8GHz 主頻, 4GB 內(nèi)存, 兩塊 Intel 82545GM 千兆網(wǎng)卡點(diǎn)對(duì)點(diǎn)互聯(lián)。

2. 測(cè)試方法
       RTX 環(huán)境下, 測(cè)試方法為兩臺(tái)機(jī)器分別運(yùn)行RT Client 和 RT Server 兩個(gè) RTSS 應(yīng)用程序, RT Client 發(fā)送數(shù)據(jù)包到 RT Server, RT Server 收到數(shù)據(jù)包之后發(fā)送回 RT Client。使用 TCP/IP & UDP 協(xié)議, 選擇不同的包長(zhǎng)度, 每次發(fā)送500 個(gè)數(shù)據(jù)包, 重復(fù) 20 次Windows 環(huán)境下, 兩臺(tái)機(jī)器分別運(yùn)行 Client 和 Server 兩個(gè)應(yīng)用程序, Client 發(fā)送數(shù)據(jù)包到 Server, Server 收到數(shù)據(jù)包之后發(fā)送回 Client。使用 TCP/IP & UDP 協(xié)議, 選擇不同的包長(zhǎng)度, 每次發(fā)送500 個(gè)數(shù)據(jù)包, 重復(fù) 20 次。

3. 測(cè)試結(jié)果
RTX 環(huán)境, TCP/IP 協(xié)議測(cè)試結(jié)果Windows 環(huán)境, TCP/IP 協(xié)議測(cè)試結(jié)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(cè)試數(shù)據(jù)分析
       使用 TCP/IP 協(xié)議, 當(dāng)傳輸?shù)臄?shù)據(jù)包長(zhǎng)度低于1460 上限時(shí), RTX 下數(shù)據(jù)包傳輸?shù)膶?shí)時(shí)性明顯優(yōu)于 Windows 。當(dāng)傳輸數(shù)據(jù)包長(zhǎng)度超過(guò) 1460 上限的大包時(shí), RTX 在應(yīng)用層分包, Windows 下在 IP 層自動(dòng)分包。由于 TCP 協(xié)議數(shù)據(jù)傳輸?shù)目煽啃砸? RTX 下大數(shù)據(jù)包需要接收多次數(shù)據(jù)包 ACK 報(bào)文, RTX 下數(shù)據(jù)包傳輸?shù)膶?shí)時(shí)性與 Windows 相當(dāng)。使用 UDP 協(xié)議傳輸時(shí), 由于 UDP 協(xié)議不需要數(shù)據(jù)包ACK 報(bào)文, RTX 實(shí)時(shí)性得以體現(xiàn), RTX 下數(shù)據(jù)包傳輸?shù)膶?shí)時(shí)性明顯優(yōu)于 Windows 。
5 結(jié)論
1）使用 TCP/IP 協(xié)議, 相比于 Windows, RTX 在傳輸小包(數(shù)據(jù)包長(zhǎng)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(shù)據(jù)包傳輸時(shí)有明顯的實(shí)時(shí)性。





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