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soc:2010:cooldavid:journal:week12 [2010/08/12 22:08] cooldavid |
soc:2010:cooldavid:journal:week12 [2010/08/13 01:31] (current) cooldavid |
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| * Tested it with emulated rtl8139 of KVM, and Native on rtl8139 hardware. | * Tested it with emulated rtl8139 of KVM, and Native on rtl8139 hardware. | ||
| - | ^ Window Size ^ tcpfix2 branch ^^ wscale2 branch ^^ | + | ^ Window Size ^ tcpfix2 branch ^^ wscale2 branch ^^ sackws2 branch ^^ |
| - | ^ ^ KVM TAP/NAT ^ Native ^ KVM TAP/NAT ^ Native ^ | + | ^ ^ KVM TAP/NAT ^ Native ^ KVM TAP/NAT ^ Native ^ KVM TAP/NAT ^ Native ^ |
| - | | 8K| 17KB/s| 16KB/s| | 16KB/s| | + | | 8K| 16KB/s| 16KB/s| 16KB/s| 16KB/s| KB/s| KB/s| |
| - | | 16K| 43KB/s| 43KB/s| | 41KB/s| | + | | 16K| 41KB/s| 41KB/s| 41KB/s| 41KB/s| KB/s| KB/s| |
| - | | 32K| 94KB/s| 93KB/s| | 91KB/s| | + | | 32K| 90KB/s| 90KB/s| 90KB/s| 91KB/s| KB/s| KB/s| |
| - | | 64K| 198KB/s| 192KB/s| | 187KB/s| | + | | 64K| 186KB/s| 186KB/s| 187KB/s| 187KB/s| KB/s| KB/s| |
| - | | 128K| | | | 374KB/s| | + | | 128K| | | 374KB/s| 374KB/s| KB/s| KB/s| |
| - | | 256K| | | | 742KB/s| | + | | 256K| | | 470KB/s| 742KB/s| KB/s| KB/s| |
| - | | 512K| | | | KB/s| | + | | 512K| | | 450KB/s| [1]344KB/s| KB/s| KB/s| |
| - | | 1024K| | | | KB/s| | + | | 1024K| | | 498KB/s| [1]403KB/s| KB/s| KB/s| |
| + | |||
| + | [1]: While TCP rx window is large enough to hit the bandwidth limit(1MB/s), | ||
| + | packets start to drop. According to captured data, the retransmittion is very slow. | ||
| + | The sending host wait a long time for transmit next missing packet required by client. | ||
| + | This issue should be able to fixed with Selective ACK support. | ||
