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Mini Shell
Mini Shell
Demonstrations of tcpcong, the Linux eBPF/bcc version.
This tool traces linux kernel's tcp congestion control status change functions,
then calculate duration of every status and record it, at last prints it as
tables or histogram, which can be used for evaluating the tcp congestion
algorithm's performance.
For example:
./tcpcong
Tracing tcp congestion control status duration... Hit Ctrl-C to end.
^C
LAddrPort RAddrPort Open_ms Dod_ms Rcov_ms Cwr_ms Los_ms Chgs
192.168.219.3/34968 192.168.219.4/19230 884 12 102 507 0 2721
192.168.219.3/34976 192.168.219.4/19230 869 12 133 490 0 2737
192.168.219.3/34982 192.168.219.4/19230 807 0 0 699 0 3158
192.168.219.3/34988 192.168.219.4/19230 892 16 88 508 0 2540
192.168.219.3/38946 192.168.219.4/19229 894 13 97 500 0 2697
192.168.219.3/38950 192.168.219.4/19229 840 10 73 579 1 1840
192.168.219.3/38970 192.168.219.4/19229 862 17 91 534 0 2339
192.168.219.3/38982 192.168.219.4/19229 812 13 92 587 0 2102
192.168.219.3/39070 192.168.219.1/19225 855 7 61 580 0 2826
192.168.219.3/39098 192.168.219.1/19225 880 8 47 568 0 2557
192.168.219.3/39112 192.168.219.1/19225 674 2 10 819 0 2867
192.168.219.3/39120 192.168.219.1/19225 757 1 11 736 0 2978
192.168.219.3/41146 192.168.219.1/19227 736 1 10 758 0 2972
192.168.219.3/41162 192.168.219.1/19227 662 2 10 830 0 2889
192.168.219.3/41178 192.168.219.1/19227 646 2 11 846 0 2858
192.168.219.3/41192 192.168.219.1/19227 812 9 67 615 0 2204
192.168.219.3/43856 192.168.219.2/19225 745 1 5 754 0 3067
192.168.219.3/43858 192.168.219.2/19225 827 4 36 636 0 2130
192.168.219.3/43872 192.168.219.2/19225 739 0 2 764 0 3035
192.168.219.3/43880 192.168.219.2/19225 747 0 3 756 0 3144
192.168.219.3/47230 192.168.219.2/19227 830 4 38 632 0 2554
192.168.219.3/47242 192.168.219.2/19227 782 3 32 687 0 2136
192.168.219.3/47272 192.168.219.2/19227 611 1 3 889 0 2629
192.168.219.3/47294 192.168.219.2/19227 832 3 38 630 0 2631
192.168.219.3/49716 192.168.219.2/19226 846 4 44 610 0 2562
192.168.219.3/49746 192.168.219.2/19226 765 0 4 736 0 2998
192.168.219.3/49760 192.168.219.2/19226 812 2 47 644 0 2273
192.168.219.3/49766 192.168.219.2/19226 724 0 2 779 0 3106
192.168.219.3/54076 192.168.219.1/19226 690 1 9 804 0 2939
192.168.219.3/54096 192.168.219.1/19226 715 2 10 778 0 2974
192.168.219.3/54114 192.168.219.1/19226 878 6 61 558 0 2742
192.168.219.3/54120 192.168.219.1/19226 738 0 9 757 0 2959
192.168.219.3/60926 192.168.219.4/19228 711 11 80 702 0 1870
192.168.219.3/60930 192.168.219.4/19228 785 0 0 720 0 3325
192.168.219.3/60942 192.168.219.4/19228 762 0 1 743 0 3342
192.168.219.3/60948 192.168.219.4/19228 877 11 102 514 0 2654
The example shows all tcp socket's congestion status duration for milliseconds,
open_ms column is the duration of tcp connection in open status whose cwnd can
increase; dod_ms column is the duration of tcp connection in disorder status
who receives disordered packet; rcov_ms column is the duration of tcp
connection in recovery status who receives 3 duplicated acks; cwr_ms column
is the duration of tcp connection who receives explicitly congest notifier and
two acks to reduce the cwnd. the last column chgs prints total status change
number of the socket.
An interval can be provided, and also optionally a count. Eg, printing output
every 1 second, and including timestamps (-T):
./tcpcong -T 1 3
Tracing tcp congestion control status duration... Hit Ctrl-C to end.
07:37:55
LAddrPort RAddrPort Open_ms Dod_ms Rcov_ms Cwr_ms Los_ms Chgs
192.168.219.3/34968 192.168.219.4/19230 742 15 82 311 0 1678
192.168.219.3/34976 192.168.219.4/19230 700 12 98 340 0 1965
192.168.219.3/34982 192.168.219.4/19230 634 0 1 516 0 2471
192.168.219.3/34988 192.168.219.4/19230 692 12 94 354 0 1941
192.168.219.3/38946 192.168.219.4/19229 722 12 90 323 0 2006
192.168.219.3/38950 192.168.219.4/19229 420 7 264 439 1 951
192.168.219.3/38970 192.168.219.4/19229 724 14 90 323 0 1986
192.168.219.3/38982 192.168.219.4/19229 686 13 87 365 0 1675
192.168.219.3/39070 192.168.219.1/19225 653 5 46 446 0 1998
192.168.219.3/39098 192.168.219.1/19225 667 4 38 440 0 2098
192.168.219.3/39112 192.168.219.1/19225 606 0 1 543 0 2146
192.168.219.3/39120 192.168.219.1/19225 492 0 205 453 0 1916
192.168.219.3/41146 192.168.219.1/19227 583 0 3 564 0 2332
192.168.219.3/41162 192.168.219.1/19227 536 0 1 613 0 2192
192.168.219.3/41178 192.168.219.1/19227 499 0 2 649 0 2064
192.168.219.3/41192 192.168.219.1/19227 622 6 34 488 0 1660
192.168.219.3/43856 192.168.219.2/19225 555 0 1 593 0 2359
192.168.219.3/43858 192.168.219.2/19225 618 3 28 502 0 1773
192.168.219.3/43872 192.168.219.2/19225 558 0 0 592 0 2318
192.168.219.3/43880 192.168.219.2/19225 580 0 1 569 0 2303
192.168.219.3/47230 192.168.219.2/19227 646 1 18 485 0 1776
192.168.219.3/47242 192.168.219.2/19227 634 0 20 495 0 1582
192.168.219.3/47272 192.168.219.2/19227 463 0 1 687 0 1854
192.168.219.3/47294 192.168.219.2/19227 636 2 27 486 0 1901
192.168.219.3/49716 192.168.219.2/19226 646 2 28 475 0 1832
192.168.219.3/49746 192.168.219.2/19226 583 0 0 567 0 2333
192.168.219.3/49760 192.168.219.2/19226 628 2 26 495 0 1755
192.168.219.3/49766 192.168.219.2/19226 558 0 0 592 0 2412
192.168.219.3/54076 192.168.219.1/19226 581 0 2 567 0 2042
192.168.219.3/54096 192.168.219.1/19226 554 0 2 594 0 2239
192.168.219.3/54114 192.168.219.1/19226 685 4 33 427 0 1859
192.168.219.3/54120 192.168.219.1/19226 611 0 3 537 0 2322
192.168.219.3/60926 192.168.219.4/19228 681 20 101 347 0 1636
192.168.219.3/60930 192.168.219.4/19228 616 0 1 532 0 2310
192.168.219.3/60942 192.168.219.4/19228 607 0 1 543 0 2433
192.168.219.3/60948 192.168.219.4/19228 597 11 76 293 0 1641
07:37:57
LAddrPort RAddrPort Open_ms Dod_ms Rcov_ms Cwr_ms Los_ms Chgs
192.168.219.3/34968 192.168.219.4/19230 469 9 255 265 0 1305
192.168.219.3/34976 192.168.219.4/19230 580 11 91 316 0 1916
192.168.219.3/34982 192.168.219.4/19230 566 0 0 433 0 2092
192.168.219.3/34988 192.168.219.4/19230 583 9 63 345 0 1871
192.168.219.3/38946 192.168.219.4/19229 449 16 69 464 0 1425
192.168.219.3/38950 192.168.219.4/19229 569 10 68 349 0 1848
192.168.219.3/38970 192.168.219.4/19229 573 20 66 339 0 1839
192.168.219.3/38982 192.168.219.4/19229 553 9 60 378 0 1483
192.168.219.3/39070 192.168.219.1/19225 471 3 243 280 0 1279
192.168.219.3/39098 192.168.219.1/19225 598 4 37 355 0 1717
192.168.219.3/39112 192.168.219.1/19225 522 0 1 476 0 1816
192.168.219.3/39120 192.168.219.1/19225 518 0 1 480 0 2031
192.168.219.3/41146 192.168.219.1/19227 500 0 3 497 0 1996
192.168.219.3/41162 192.168.219.1/19227 448 0 2 548 0 1849
192.168.219.3/41178 192.168.219.1/19227 441 0 4 554 0 1693
192.168.219.3/41192 192.168.219.1/19227 555 4 34 405 0 1341
192.168.219.3/43856 192.168.219.2/19225 471 0 3 525 0 2118
192.168.219.3/43858 192.168.219.2/19225 541 1 25 430 0 1446
192.168.219.3/43872 192.168.219.2/19225 483 0 1 516 0 2044
192.168.219.3/43880 192.168.219.2/19225 492 0 0 507 0 2073
192.168.219.3/47230 192.168.219.2/19227 581 3 29 385 0 1453
192.168.219.3/47242 192.168.219.2/19227 571 2 22 403 0 1292
192.168.219.3/47272 192.168.219.2/19227 393 0 0 604 0 1516
192.168.219.3/47294 192.168.219.2/19227 575 2 27 393 0 1660
192.168.219.3/49716 192.168.219.2/19226 584 1 25 389 0 1582
192.168.219.3/49746 192.168.219.2/19226 513 0 0 486 0 2017
192.168.219.3/49760 192.168.219.2/19226 560 1 24 412 0 1370
192.168.219.3/49766 192.168.219.2/19226 474 0 0 525 0 2121
192.168.219.3/54076 192.168.219.1/19226 504 0 1 494 0 1724
192.168.219.3/54096 192.168.219.1/19226 490 0 2 507 0 1906
192.168.219.3/54114 192.168.219.1/19226 611 3 25 360 0 1560
192.168.219.3/54120 192.168.219.1/19226 520 0 1 479 0 2010
192.168.219.3/60926 192.168.219.4/19228 527 9 53 408 0 1473
192.168.219.3/60930 192.168.219.4/19228 551 0 0 448 0 1951
192.168.219.3/60942 192.168.219.4/19228 538 0 0 461 0 2038
192.168.219.3/60948 192.168.219.4/19228 511 9 68 295 1 1701
07:37:58
LAddrPort RAddrPort Open_ms Dod_ms Rcov_ms Cwr_ms Los_ms Chgs
192.168.219.3/34968 192.168.219.4/19230 293 1 226 211 0 755
192.168.219.3/34976 192.168.219.4/19230 424 4 36 354 0 1489
192.168.219.3/34982 192.168.219.4/19230 552 0 0 446 0 2249
192.168.219.3/34988 192.168.219.4/19230 493 4 42 327 0 1715
192.168.219.3/38946 192.168.219.4/19229 425 4 37 340 41 1478
192.168.219.3/38950 192.168.219.4/19229 465 5 45 335 0 1586
192.168.219.3/38970 192.168.219.4/19229 531 5 41 420 0 1863
192.168.219.3/38982 192.168.219.4/19229 525 5 41 427 0 1625
192.168.219.3/39070 192.168.219.1/19225 576 4 44 374 0 1787
192.168.219.3/39098 192.168.219.1/19225 596 6 41 355 0 1782
192.168.219.3/39112 192.168.219.1/19225 501 0 3 494 0 1887
192.168.219.3/39120 192.168.219.1/19225 511 0 4 483 0 2070
192.168.219.3/41146 192.168.219.1/19227 503 0 3 492 0 2068
192.168.219.3/41162 192.168.219.1/19227 449 1 3 545 0 1962
192.168.219.3/41178 192.168.219.1/19227 445 0 5 546 0 1907
192.168.219.3/41192 192.168.219.1/19227 436 4 248 309 0 1208
192.168.219.3/43856 192.168.219.2/19225 480 0 0 519 0 2108
192.168.219.3/43858 192.168.219.2/19225 534 3 24 437 0 1644
192.168.219.3/43872 192.168.219.2/19225 480 0 0 519 0 2068
192.168.219.3/43880 192.168.219.2/19225 490 0 0 508 0 2083
192.168.219.3/47230 192.168.219.2/19227 561 3 22 411 0 1556
192.168.219.3/47242 192.168.219.2/19227 550 2 22 424 0 1485
192.168.219.3/47272 192.168.219.2/19227 398 0 0 601 0 1537
192.168.219.3/47294 192.168.219.2/19227 551 1 19 427 0 1712
192.168.219.3/49716 192.168.219.2/19226 570 1 20 405 0 1712
192.168.219.3/49746 192.168.219.2/19226 494 0 0 503 0 2052
192.168.219.3/49760 192.168.219.2/19226 547 1 18 431 0 1673
192.168.219.3/49766 192.168.219.2/19226 497 0 0 501 0 1983
192.168.219.3/54076 192.168.219.1/19226 495 0 4 499 0 1849
192.168.219.3/54096 192.168.219.1/19226 485 0 4 508 0 2037
192.168.219.3/54114 192.168.219.1/19226 603 5 37 354 0 1671
192.168.219.3/54120 192.168.219.1/19226 516 0 1 482 0 2047
192.168.219.3/60926 192.168.219.4/19228 543 5 39 412 0 1708
192.168.219.3/60930 192.168.219.4/19228 530 0 0 469 0 2096
192.168.219.3/60942 192.168.219.4/19228 510 0 0 489 0 2234
192.168.219.3/60948 192.168.219.4/19228 565 4 61 367 0 1956
An local port and remote port can be specified, and also optionally a count.
Eg printing output every 1 second, and including timestamps (-T) for local
ports 30000-40000 and remote ports 19225-19227:
./tcpcong -T -L 30000-40000 -R 19225-19227 1 3
Tracing tcp congestion control status duration... Hit Ctrl-C to end.
07:39:11
LAddrPort RAddrPort Open_ms Dod_ms Rcov_ms Cwr_ms Los_ms Chgs
192.168.219.3/39070 192.168.219.1/19225 668 4 32 455 0 1706
192.168.219.3/39098 192.168.219.1/19225 692 4 38 424 0 2110
192.168.219.3/39112 192.168.219.1/19225 564 0 2 593 0 2291
192.168.219.3/39120 192.168.219.1/19225 599 0 4 555 0 2387
07:39:12
LAddrPort RAddrPort Open_ms Dod_ms Rcov_ms Cwr_ms Los_ms Chgs
192.168.219.3/39070 192.168.219.1/19225 576 3 27 391 0 1525
192.168.219.3/39098 192.168.219.1/19225 580 3 36 379 0 1893
192.168.219.3/39112 192.168.219.1/19225 474 1 10 512 0 2009
192.168.219.3/39120 192.168.219.1/19225 505 1 9 483 0 2022
07:39:13
LAddrPort RAddrPort Open_ms Dod_ms Rcov_ms Cwr_ms Los_ms Chgs
192.168.219.3/39070 192.168.219.1/19225 546 6 27 418 0 1659
192.168.219.3/39098 192.168.219.1/19225 564 4 40 390 0 1937
192.168.219.3/39112 192.168.219.1/19225 479 0 3 514 0 2008
192.168.219.3/39120 192.168.219.1/19225 515 0 4 479 0 1982
The (-u) option can be specified for recording the duration as miroseconds.
Eg printing output every 1 second, and including timestamps (-T) and
microseconds (-u) for local ports 30000-40000 and remote ports 19225-19227:
./tcpcong -T -u -L 30000-40000 -R 19225-19227 1 3
Tracing tcp congestion control status duration... Hit Ctrl-C to end.
07:39:44
LAddrPort RAddrPort Open_us Dod_us Rcov_us Cwr_us Los_us Chgs
192.168.219.3/39070 192.168.219.1/19225 600971 3232 38601 509796 0 1843
192.168.219.3/39098 192.168.219.1/19225 667184 5585 26285 453575 0 1969
192.168.219.3/39112 192.168.219.1/19225 580982 22 1502 569479 0 2210
192.168.219.3/39120 192.168.219.1/19225 600280 201 955 550752 0 2327
07:39:45
LAddrPort RAddrPort Open_us Dod_us Rcov_us Cwr_us Los_us Chgs
192.168.219.3/39070 192.168.219.1/19225 567189 2029 25966 404698 0 1612
192.168.219.3/39098 192.168.219.1/19225 597201 2263 24073 376454 0 1578
192.168.219.3/39112 192.168.219.1/19225 500792 846 9297 489264 0 1850
192.168.219.3/39120 192.168.219.1/19225 518700 94 749 480171 0 1967
07:39:46
LAddrPort RAddrPort Open_us Dod_us Rcov_us Cwr_us Los_us Chgs
192.168.219.3/39070 192.168.219.1/19225 587340 5324 37035 370066 0 1602
192.168.219.3/39098 192.168.219.1/19225 532986 5630 31624 345336 0 1319
192.168.219.3/39112 192.168.219.1/19225 481936 1129 6244 510235 0 1909
192.168.219.3/39120 192.168.219.1/19225 507196 316 6200 485737 0 1957
the ipv6 example with (-u) option can be shown.
Eg printing output every 1 second, and including timestamps (-T) and
microseconds (-u) for local ports 30000-40000 and remote ports 19225-19227:
./tcpcong.py -T -u -L 30000-40000 -R 19225-19227 1 3
Tracing tcp congestion control status duration... Hit Ctrl-C to end.
11:31:55
LAddrPort6 RAddrPort6 Open_us Dod_us Rcov_us Cwr_us Los_us Chgs
fe80::bace:f6ff:fe14:d21c/32810 fe80::bace:f6ff:fe43:fe96/19226 876328 0 0 137957 0 235
fe80::bace:f6ff:fe14:d21c/32812 fe80::bace:f6ff:fe43:fe96/19226 757739 0 0 283114 0 590
fe80::bace:f6ff:fe14:d21c/32814 fe80::bace:f6ff:fe43:fe96/19226 855426 0 0 136134 0 231
fe80::bace:f6ff:fe14:d21c/32816 fe80::bace:f6ff:fe43:fe96/19226 695271 0 0 345443 0 606
11:31:56
LAddrPort6 RAddrPort6 Open_us Dod_us Rcov_us Cwr_us Los_us Chgs
fe80::bace:f6ff:fe14:d21c/32810 fe80::bace:f6ff:fe43:fe96/19226 913925 0 0 81995 0 92
fe80::bace:f6ff:fe14:d21c/32812 fe80::bace:f6ff:fe43:fe96/19226 785024 0 0 202819 0 777
fe80::bace:f6ff:fe14:d21c/32814 fe80::bace:f6ff:fe43:fe96/19226 920963 0 0 80715 0 111
fe80::bace:f6ff:fe14:d21c/32816 fe80::bace:f6ff:fe43:fe96/19226 765172 0 0 222897 0 734
11:31:57
LAddrPort6 RAddrPort6 Open_us Dod_us Rcov_us Cwr_us Los_us Chgs
fe80::bace:f6ff:fe14:d21c/32810 fe80::bace:f6ff:fe43:fe96/19226 839563 0 0 98313 0 149
fe80::bace:f6ff:fe14:d21c/32812 fe80::bace:f6ff:fe43:fe96/19226 534816 0 0 329683 0 495
fe80::bace:f6ff:fe14:d21c/32814 fe80::bace:f6ff:fe43:fe96/19226 841706 103 2404 91273 0 132
fe80::bace:f6ff:fe14:d21c/32816 fe80::bace:f6ff:fe43:fe96/19226 633320 0 0 286584 0 565
The distribution of congestion status duration can be printed as a histogram
with the -d option and also optionally a count. Eg printing output every
1 second for microseconds, and including timestamps (-T):
./tcpcong.py -d -u -T 1 2
Tracing tcp congestion control status duration... Hit Ctrl-C to end.
07:40:12
tcp_congest_state = cwr
usecs : count distribution
0 -> 1 : 0 | |
2 -> 3 : 0 | |
4 -> 7 : 11 | |
8 -> 15 : 10 | |
16 -> 31 : 25 | |
32 -> 63 : 58 | |
64 -> 127 : 117 | |
128 -> 255 : 2924 |******* |
256 -> 511 : 16249 |****************************************|
512 -> 1023 : 15340 |************************************* |
1024 -> 2047 : 786 |* |
2048 -> 4095 : 24 | |
4096 -> 8191 : 7 | |
8192 -> 16383 : 0 | |
16384 -> 32767 : 0 | |
32768 -> 65535 : 1 | |
65536 -> 131071 : 0 | |
131072 -> 262143 : 1 | |
tcp_congest_state = recovery
usecs : count distribution
0 -> 1 : 0 | |
2 -> 3 : 0 | |
4 -> 7 : 1 | |
8 -> 15 : 0 | |
16 -> 31 : 2 | |
32 -> 63 : 9 | |
64 -> 127 : 28 | |
128 -> 255 : 895 |****************************** |
256 -> 511 : 1190 |****************************************|
512 -> 1023 : 384 |************ |
1024 -> 2047 : 66 |** |
2048 -> 4095 : 2 | |
4096 -> 8191 : 4 | |
8192 -> 16383 : 2 | |
16384 -> 32767 : 0 | |
32768 -> 65535 : 0 | |
65536 -> 131071 : 0 | |
131072 -> 262143 : 2 | |
tcp_congest_state = disorder
usecs : count distribution
0 -> 1 : 0 | |
2 -> 3 : 0 | |
4 -> 7 : 21 |** |
8 -> 15 : 59 |***** |
16 -> 31 : 102 |********* |
32 -> 63 : 256 |************************* |
64 -> 127 : 409 |****************************************|
128 -> 255 : 255 |************************ |
256 -> 511 : 104 |********** |
512 -> 1023 : 8 | |
tcp_congest_state = open
usecs : count distribution
0 -> 1 : 0 | |
2 -> 3 : 11 | |
4 -> 7 : 266 | |
8 -> 15 : 319 | |
16 -> 31 : 396 |* |
32 -> 63 : 488 |* |
64 -> 127 : 695 |** |
128 -> 255 : 4395 |************* |
256 -> 511 : 13329 |****************************************|
512 -> 1023 : 12727 |************************************** |
1024 -> 2047 : 3327 |********* |
2048 -> 4095 : 601 |* |
4096 -> 8191 : 45 | |
8192 -> 16383 : 3 | |
16384 -> 32767 : 1 | |
32768 -> 65535 : 1 | |
tcp_congest_state = loss
usecs : count distribution
0 -> 1 : 0 | |
2 -> 3 : 0 | |
4 -> 7 : 0 | |
8 -> 15 : 0 | |
16 -> 31 : 0 | |
32 -> 63 : 0 | |
64 -> 127 : 0 | |
128 -> 255 : 1 |****************************************|
256 -> 511 : 1 |****************************************|
512 -> 1023 : 0 | |
1024 -> 2047 : 0 | |
2048 -> 4095 : 0 | |
4096 -> 8191 : 0 | |
8192 -> 16383 : 0 | |
16384 -> 32767 : 0 | |
32768 -> 65535 : 1 |****************************************|
07:40:14
tcp_congest_state = cwr
usecs : count distribution
0 -> 1 : 0 | |
2 -> 3 : 7 | |
4 -> 7 : 162 | |
8 -> 15 : 591 |* |
16 -> 31 : 462 | |
32 -> 63 : 351 | |
64 -> 127 : 441 | |
128 -> 255 : 4073 |******** |
256 -> 511 : 19188 |****************************************|
512 -> 1023 : 16127 |********************************* |
1024 -> 2047 : 725 |* |
2048 -> 4095 : 23 | |
4096 -> 8191 : 3 | |
8192 -> 16383 : 2 | |
16384 -> 32767 : 0 | |
32768 -> 65535 : 4 | |
65536 -> 131071 : 0 | |
131072 -> 262143 : 2 | |
tcp_congest_state = recovery
usecs : count distribution
0 -> 1 : 0 | |
2 -> 3 : 0 | |
4 -> 7 : 3 | |
8 -> 15 : 16 | |
16 -> 31 : 22 | |
32 -> 63 : 37 |* |
64 -> 127 : 75 |** |
128 -> 255 : 1082 |******************************* |
256 -> 511 : 1364 |****************************************|
512 -> 1023 : 369 |********** |
1024 -> 2047 : 67 |* |
2048 -> 4095 : 0 | |
4096 -> 8191 : 2 | |
8192 -> 16383 : 0 | |
16384 -> 32767 : 0 | |
32768 -> 65535 : 0 | |
65536 -> 131071 : 0 | |
131072 -> 262143 : 5 | |
tcp_congest_state = disorder
usecs : count distribution
0 -> 1 : 0 | |
2 -> 3 : 4 | |
4 -> 7 : 43 |**** |
8 -> 15 : 107 |*********** |
16 -> 31 : 145 |*************** |
32 -> 63 : 312 |********************************* |
64 -> 127 : 370 |****************************************|
128 -> 255 : 256 |*************************** |
256 -> 511 : 101 |********** |
512 -> 1023 : 8 | |
tcp_congest_state = open
usecs : count distribution
0 -> 1 : 0 | |
2 -> 3 : 21 | |
4 -> 7 : 359 | |
8 -> 15 : 516 |* |
16 -> 31 : 484 |* |
32 -> 63 : 522 |* |
64 -> 127 : 818 |** |
128 -> 255 : 5081 |************* |
256 -> 511 : 14852 |****************************************|
512 -> 1023 : 13753 |************************************* |
1024 -> 2047 : 3224 |******** |
2048 -> 4095 : 598 |* |
4096 -> 8191 : 41 | |
8192 -> 16383 : 0 | |
16384 -> 32767 : 1 | |
32768 -> 65535 : 0 | |
65536 -> 131071 : 0 | |
131072 -> 262143 : 1 | |
tcp_congest_state = loss
usecs : count distribution
0 -> 1 : 0 | |
2 -> 3 : 0 | |
4 -> 7 : 0 | |
8 -> 15 : 0 | |
16 -> 31 : 0 | |
32 -> 63 : 0 | |
64 -> 127 : 1 |****** |
128 -> 255 : 0 | |
256 -> 511 : 2 |************* |
512 -> 1023 : 6 |****************************************|
1024 -> 2047 : 0 | |
2048 -> 4095 : 0 | |
4096 -> 8191 : 0 | |
8192 -> 16383 : 0 | |
16384 -> 32767 : 0 | |
32768 -> 65535 : 1 |****** |
USAGE:
./tcpcong -h
usage: tcpcong [-h] [-L LOCALPORT] [-R REMOTEPORT] [-T] [-d] [-u]
[interval] [outputs]
Summarize tcp socket congestion control status duration
positional arguments:
interval output interval, in seconds
outputs number of outputs
optional arguments:
-h, --help show this help message and exit
-L LOCALPORT, --localport LOCALPORT
trace local ports only
-R REMOTEPORT, --remoteport REMOTEPORT
trace the dest ports only
-T, --timestamp include timestamp on output
-d, --dist show distributions as histograms
-u, --microseconds output in microseconds
examples:
./tcpcong # show tcp congestion status duration
./tcpcong 1 10 # show 1 second summaries, 10 times
./tcpcong -L 3000-3006 1 # 1s summaries, local port 3000-3006
./tcpcong -R 5000-5005 1 # 1s summaries, remote port 5000-5005
./tcpcong -uT 1 # 1s summaries, microseconds, and timestamps
./tcpcong -d # show the duration as histograms
Zerion Mini Shell 1.0