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PCDVD數位科技討論區
(https://www.pcdvd.com.tw/index.php)
- 系統組件
(https://www.pcdvd.com.tw/forumdisplay.php?f=19)
- - 最近想買一張GBe的NIC~
(https://www.pcdvd.com.tw/showthread.php?t=643316)
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之前省錢使用3．
結果電腦問題不斷，後來換成1． 什麼網路的怪問題都解決了.. 怪問題 1.突然區網別台無法連進來，但可以連到別人的電腦，有時又正常 2.有時開機不正常 3.區網互連有時速度很慢.. PS:反正我就是跟D-LINK的產品互衝，看別人都用的很正常.. :jolin: |
引用:
鵝來貼個linux下的測試結果好了:p... BTW,測試環境是以約2m的CAT5e直接對接,client是S754的Sempron2500+1GB DDR400+PCI-E 88E8053,server是AM2的Sempron3000+2GB DDRII667+MCP51內建的GbE(PHY也是Marvell的),沒開Jumbo Frame(因為linux不知為何沒辦法開MCP51 GbE的off loading及Jumbo Frame等功能:ase).... 只開一個connection,88E8053 default有開offloading時 root@lab01:~# ethtool -k eth0 Offload parameters for eth0: rx-checksumming: on tx-checksumming: on scatter-gather: on tcp segmentation offload: on root@lab01:~# time iperf -c 192.168.1.115 ------------------------------------------------------------ Client connecting to 192.168.1.115, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 5] local 192.168.1.110 port 56285 connected with 192.168.1.115 port 5001 [ 5] 0.0-10.0 sec 1.09 GBytes 938 Mbits/sec real 0m10.035s user 0m0.064s sys 0m2.008s throughput約938Mbps,CPU loading約20%.... 同上,關閉所有off loading.... root@lab01:~# ethtool -k eth0 Offload parameters for eth0: rx-checksumming: off tx-checksumming: off scatter-gather: off tcp segmentation offload: off root@lab01:~# time iperf -c 192.168.1.115 ------------------------------------------------------------ Client connecting to 192.168.1.115, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 5] local 192.168.1.110 port 56286 connected with 192.168.1.115 port 5001 [ 5] 0.0-10.0 sec 998 MBytes 837 Mbits/sec real 0m10.020s user 0m0.044s sys 0m3.308s throughput下降約10%,CPU loading由20%上升到33%(約60%).... 重新打開所有off loading,開10個connection.... root@lab01:~# ethtool -k eth0 Offload parameters for eth0: rx-checksumming: on tx-checksumming: on scatter-gather: on tcp segmentation offload: on root@lab01:~# time iperf -c 192.168.1.115 -P10 ------------------------------------------------------------ Client connecting to 192.168.1.115, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 5] local 192.168.1.110 port 36511 connected with 192.168.1.115 port 5001 [ 6] local 192.168.1.110 port 36512 connected with 192.168.1.115 port 5001 [ 7] local 192.168.1.110 port 36513 connected with 192.168.1.115 port 5001 [ 8] local 192.168.1.110 port 36514 connected with 192.168.1.115 port 5001 [ 9] local 192.168.1.110 port 36515 connected with 192.168.1.115 port 5001 [ 14] local 192.168.1.110 port 36520 connected with 192.168.1.115 port 5001 [ 10] local 192.168.1.110 port 36516 connected with 192.168.1.115 port 5001 [ 11] local 192.168.1.110 port 36517 connected with 192.168.1.115 port 5001 [ 12] local 192.168.1.110 port 36518 connected with 192.168.1.115 port 5001 [ 13] local 192.168.1.110 port 36519 connected with 192.168.1.115 port 5001 [ 5] 0.0-10.0 sec 113 MBytes 94.8 Mbits/sec [ 6] 0.0-10.0 sec 113 MBytes 94.7 Mbits/sec [ 7] 0.0-10.0 sec 113 MBytes 94.7 Mbits/sec [ 9] 0.0-10.0 sec 112 MBytes 94.3 Mbits/sec [ 10] 0.0-10.0 sec 112 MBytes 93.7 Mbits/sec [ 8] 0.0-10.0 sec 113 MBytes 94.6 Mbits/sec [ 14] 0.0-10.0 sec 112 MBytes 94.0 Mbits/sec [ 11] 0.0-10.0 sec 112 MBytes 93.9 Mbits/sec [ 13] 0.0-10.0 sec 112 MBytes 93.8 Mbits/sec [ 12] 0.0-10.0 sec 112 MBytes 93.8 Mbits/sec [SUM] 0.0-10.0 sec 1.10 GBytes 939 Mbits/sec real 0m10.086s user 0m0.080s sys 0m2.044s CPU loading及throughput都與開一個connection時約略相當.... 同上,關閉所有off loading.... root@lab01:~# ethtool -k eth0 Offload parameters for eth0: rx-checksumming: off tx-checksumming: off scatter-gather: off tcp segmentation offload: off root@lab01:~# time iperf -c 192.168.1.115 -P10 ------------------------------------------------------------ Client connecting to 192.168.1.115, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 14] local 192.168.1.110 port 58168 connected with 192.168.1.115 port 5001 [ 5] local 192.168.1.110 port 58159 connected with 192.168.1.115 port 5001 [ 6] local 192.168.1.110 port 58160 connected with 192.168.1.115 port 5001 [ 7] local 192.168.1.110 port 58161 connected with 192.168.1.115 port 5001 [ 8] local 192.168.1.110 port 58162 connected with 192.168.1.115 port 5001 [ 9] local 192.168.1.110 port 58163 connected with 192.168.1.115 port 5001 [ 10] local 192.168.1.110 port 58164 connected with 192.168.1.115 port 5001 [ 11] local 192.168.1.110 port 58165 connected with 192.168.1.115 port 5001 [ 12] local 192.168.1.110 port 58166 connected with 192.168.1.115 port 5001 [ 13] local 192.168.1.110 port 58167 connected with 192.168.1.115 port 5001 [ 6] 0.0- 7.0 sec 71.8 MBytes 86.0 Mbits/sec [ 9] 0.0- 7.0 sec 71.3 MBytes 85.4 Mbits/sec [ 11] 0.0- 7.0 sec 69.8 MBytes 83.7 Mbits/sec [ 12] 0.0- 7.0 sec 69.8 MBytes 83.6 Mbits/sec [ 5] 0.0- 7.0 sec 71.5 MBytes 85.6 Mbits/sec [ 7] 0.0- 7.0 sec 71.7 MBytes 85.8 Mbits/sec [ 8] 0.0- 7.0 sec 70.2 MBytes 83.9 Mbits/sec [ 10] 0.0- 7.0 sec 71.5 MBytes 85.5 Mbits/sec [ 13] 0.0- 7.0 sec 71.1 MBytes 85.1 Mbits/sec [ 14] 0.0-10.0 sec 372 MBytes 312 Mbits/sec [SUM] 0.0-10.0 sec 1010 MBytes 847 Mbits/sec real 0m13.027s user 0m0.068s sys 0m3.960s throughput約略與只開一個connection關off loading時相當,CPU loading由33%上升至40%(約20%).... 總結看來還不錯(吃CPU沒想像中的兇:p)....BTW,鵝發現iperf在M$ Win中開的buffer(TCP win)有點小---default只有8k,不知是否是iperf win32版binary版本較舊所致,若調大時(i.e. -w 64k)對throughput有不小的助益,測試結果不理想者可以試試:p:p.... |
我是推薦 Marvell 以及 Broadcom 的網路晶片
3Com 3C2000-T (Marvell, 32-bit, 33/66MHz PCI) Broadcom BCM5703 (Single Port GbE, 32/64-bit, 33/66MHz PCI bus) Broadcom BCM5704 (Dual Port GbE, 32/64-bit, 33/66MHz PCI bus) 都很流暢 也很穩 入手價都在NT$1000以下 因為都是 Second Hand Realtek GbE沒用過 不知道流暢度如何 在digit-life/ixbt-labs 的測試上, Marvell晶片在小封包傳輸上表現非常突出, Broadcom晶片在大封包傳輸上獲勝, Intel晶片表現平平 Intel 的網路卡, 82559 (100Mbps) 獨立網卡 以及82540EM (GbE) 不知為何 在我的系統上就是跑不順 感覺 頓頓的 Yahoo Games 幾乎都連不上 Intel/AMD 系統都試過了 也換過驅動程式 就是沒用 |
3C2000-T我之前找說停產了 囧
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引用:
小弟想請教幾個問題,請不吝指教 1)請問Single port 以及Dual port有何明顯的差異?是Dual較高階對嗎? 2)上述幾款NIC若是全新的價位會是多少? 3)除了上述晶片之外 Broadcom 5708,5721 以及 Marvell 88E8053(還是8503?)的等級如何呢? 不好意思,新手上路,需要各位高手幫忙 多謝多謝 |
引用:
鵝多嘴一下,dual port通常是拿來架firewall/router或trunking居多,不過若是接在33MHz PCI上統統是白搭----就算CPU跑得動,一片GbE就快把整個33MHz PCI32塞爆了:stupefy: .... 引用:
鵝印象中server級的PCI-X GbE通常要NT3K起跳,dual port者恐怕沒NT$6-7K起跳是搞不定的,沒特殊須求的話通常是不建議隨便入手的:p.... PS:88E8053是PCI-E的(不過是desktop等級的卡),鵝入手價在NT$12xx左右:p:p... |
引用:
感謝感謝 其實我並不是要買網卡 而是臨時工作上需要這些資訊 並且我之前又不是在這個field 所以才在猛抱佛腳 學海無涯啊~~~~ |
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