This is some of the data from the paper on "Dynamics of TCP Traffic over ATM Networks". Figure 2, TCP over plain ATM, 64KB windows, 10 TCPs: Buffer_Size(Bytes) Packet_Size(Bytes) Effective_Throughput(%) PERRXT(pkts) PERDROP(cells) Effective_Throughput(%): bytes/sec of goodput transmitted on link ---------------------------------------- link bandwidth in bytes/sec where "goodput" excludes duplicate cells/packets, and excludes cells that could not be assembled at the end-node into a complete packet, PERRXT(pkts): number of retransmitted packets -------------------------------- total number of packets transmitted, disregarding duplicates PERDROP(cells): number of cells dropped --------------------------- number of cells transmitted 384000 9216 84.2939 23.6 0.0517176 384000 4368 94.5163 5.8 0.0129104 384000 1536 95.1113 1.7 0.00298332 384000 528 95.7870 0.4 0.000930057 240000 9216 74.8271 46.6 0.118945 240000 4368 89.7740 13.9 0.0296435 240000 1536 93.2649 3.2 0.00650229 240000 528 95.7431 0.6 0.00121231 96000 9216 63.9605 90.0 0.264013 96000 4368 72.6924 53.0 0.139045 96000 1536 89.1504 11.8 0.026038 96000 528 93.8759 2.3 0.00487562 48000 9216 52.7603 140.3 0.366222 48000 4368 64.6341 87.5 0.257046 48000 1536 76.4344 37.6 0.0930914 48000 528 90.5878 6.1 0.0147059 12288 4368 33.4953 250.1 0.484667 12288 1536 59.4906 107.0 0.311274 12288 528 74.3288 43.9 0.122874 (figure3.64000.dat1, s_atm7.com) Figure 3, Packet TCP over non-ATM networks: Buffer_Size(Bytes) Packet_Size(Bytes) Effective_Throughput(%) Fairness PerRxt 12288 512 0.978805 1.000 10.573 12288 1500 0.977594 0.999 23.055 12288 4352 0.956369 0.993 34.958 12288 9180 0.924142 0.865 36.893 48000 512 0.989535 0.999 1.966 48000 1500 0.980399 0.998 8.050 48000 4352 0.978312 0.992 20.779 48000 9180 0.97999 0.982 29.987 96000 512 0.993452 0.998 0.669 96000 1500 0.986224 0.997 3.330 96000 4352 0.978772 0.999 12.094 96000 9180 0.982521 0.987 21.978 240000 512 0.995188 0.995 0.139 240000 1500 0.993319 0.990 0.813 240000 4352 0.986299 0.999 3.886 240000 9180 0.987617 0.994 8.905 528000 512 0.995907 0.968 0.020 528000 1500 0.996203 0.959 0.115 528000 4352 0.996615 0.970 0.627 528000 9180 0.997601 0.996 1.526 (figure5.64000.dat1, s_atm2.com) Figure 4, Partial Packet Discard: Buffer_Size(Bytes) Packet_Size(Bytes) Effective_Throughput(%) PERRXT(pkts) PERDROP(cells) 384000 9216 95.7897 7.2 0.0327487 384000 4368 97.8791 2.8 0.012625 384000 1536 96.9881 0.7 0.002937 384000 528 96.3631 0.2 0.000873958 240000 9216 91.5334 17.0 0.0779296 240000 4368 96.2724 6.1 0.0289784 240000 1536 96.5948 1.4 0.00614023 240000 528 96.4510 0.3 0.00126957 96000 9216 80.4482 52.1 0.224217 96000 4368 89.4575 22.5 0.104157 96000 1536 94.7966 5.0 0.0244548 96000 528 96.0299 1.1 0.00529825 48000 9216 70.1302 98.8 0.371615 48000 4368 81.0483 48.9 0.21092 48000 1536 91.0362 13.9 0.0674531 48000 528 95.2305 2.9 0.0153459 12288 9216 49.7318 231.8 0.608627 12288 4368 58.9536 167.9 0.513289 12288 1536 75.8060 67.4 0.285107 12288 528 88.3144 19.7 0.0998288 (figure6.64000.dat1, s_atm7.com) Figure 5, Early Packet Discard: Buffer_Size(Bytes) Packet_Size(Bytes) Effective_Throughput(%) PERRXT(pkts) PERDROP(cells) 384000 9216 98.3547 14.3 0.1156 384000 4368 99.0463 5.4 0.0474376 384000 1536 97.2747 1.3 0.0108134 384000 528 96.5425 0.2 0.00176622 240000 9216 98.1937 24.2 0.186272 240000 4368 98.6919 10.5 0.0876987 240000 1536 97.0439 2.5 0.021749 240000 528 96.4597 0.6 0.00408604 96000 9216 97.8716 47.2 0.313142 96000 4368 98.2338 28.1 0.211109 96000 1536 96.3993 8.6 0.0717707 96000 528 96.1725 2.1 0.0168592 48000 9216 88.9839 81.3 0.413463 48000 4368 98.4991 45.8 0.309338 48000 1536 96.0190 20.1 0.158258 48000 528 95.7145 5.3 0.0435945 12288 9216 55.7284 237.2 0.636398 12288 4368 73.8849 141.6 0.525854 12288 1536 94.4727 56.2 0.348616 12288 528 95.2788 22.5 0.176736 (figure7.64000.dat1, s_atm7.com)