Re: [multipathtcp] Observed low throughput when combined High Speed and Low Speed
Christoph Paasch <cpaasch@apple.com> Tue, 06 March 2018 05:55 UTC
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From: Christoph Paasch <cpaasch@apple.com>
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Date: Mon, 05 Mar 2018 21:55:14 -0800
Cc: mptcp-dev Mailing List <mptcp-dev@listes.uclouvain.be>
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To: Gangadhar Akula <gangadhar402@gmail.com>
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Subject: Re: [multipathtcp] Observed low throughput when combined High Speed and Low Speed
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(moving the IETF-group to BCC as this is a Linux issue) Hello Gangadhar, > On Mar 1, 2018, at 5:54 AM, Gangadhar Akula <gangadhar402@gmail.com> wrote: > > Hello Team, > > I have run a couple of tests with MPTCP for performance benchmarking. > I found that when we combine two different speeds, High speed, and Low speed, > the resultant is speed is lower than a high-speed link. > Is there any configuration that I can make to ensure that it will not happen at all? in principle, the scheduler should make sure that you get at least the throughput of the highest speed link. Which release of MPTCP are you using? Can you provide a packet-trace of such a scenario? Thanks, Christoph > > Setting low-speed path as the backup path is not my intention, as at times the low-speed paths have good speed and give better results. > > 20 Times Speed Difference 5 Times Speed Difference 2 Times Speed Difference > Test No. Speed A MPTCP OFF Speed B MPTCP OFF Speed A+B MPTCP ON Speed A MPTCP OFF Speed B MPTCP OFF Speed A+B MPTCP ON Speed A MPTCP OFF Speed B MPTCP OFF Speed A+B MPTCP ON > 1 450 43 158 18 202 301 507 202 373 > 2 539 21 161 29 261 262 460 261 542 > 3 496 19 105 39 156 151 501 156 758 > 4 661 145 25 170 139 693 170 502 > 5 378 180 32 104 145 492 104 642 > 6 376 127 97 176 106 659 176 416 > 7 277 92 72 263 149 475 263 617 > 8 384 125 63 233 162 448 233 431 > 9 286 159 56 236 273 316 236 483 > 10 438 193 86 337 304 479 337 465 > Speed- KBPS 428.5 27.66666667 144.5 51.7 213.8 199.2 503 213.8 522.9 > Mbps 3.34765625 0.216145833 1.12890625 0.40390625 1.6703125 1.55625 3.9296875 1.6703125 4.08515625 > 11 419 18 215 79 584 541 313 240 529 > 12 457 22 223 58 538 634 273 259 455 > 13 312 20 348 50 578 564 293 276 234 > 14 373 317 52 700 597 231 292 320 > 15 440 326 63 612 516 377 155 446 > 16 781 348 40 770 731 380 207 381 > 17 641 286 35 604 438 642 202 334 > 18 298 228 51 420 392 600 292 427 > 19 573 296 26 571 600 247 427 717 > 20 532 304 73 350 708 492 241 417 > Speed- KBPS 482.6 20 289.1 52.7 572.7 572.1 384.8 259.1 426 > Mbps 3.7703125 0.15625 2.25859375 0.41171875 4.47421875 4.46953125 3.00625 2.02421875 3.328125 > > > Best Regards, > Gangadhar Akula > <MPTCP_Performance with various speed differences.png><MPTCP_Performance with various speed differences.xlsx>
- Re: [multipathtcp] Observed low throughput when c… Christoph Paasch