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Linux Test Project (mailing list: https://lists.linux.it/listinfo/ltp)
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Why are these threads in D state？ #938

Closed haidong-yao closed 2 years ago

haidong-yao commented 2 years ago

./runltp -c 2 -i 200

the thread 1458 is D.

root 1444 0.0 0.0 2644 544 ttyS2 S 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --cpu 2 root 1445 0.0 0.0 2644 512 ttyS2 S 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 root 1451 0.0 0.0 2644 240 ttyS2 S 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 root 1452 0.0 0.0 2644 88 ttyS2 S 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --cpu 2 root 1454 0.0 0.0 2644 88 ttyS2 D 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 root 1455 99.8 0.0 2644 88 ttyS2 R 19:03 19:21 /ota/ltp20220121/opt/ltp/testcases/bin/genload --cpu 2 root 1456 0.0 0.0 2644 88 ttyS2 D 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 root 1457 99.8 0.0 2644 88 ttyS2 R 19:03 19:21 /ota/ltp20220121/opt/ltp/testcases/bin/genload --cpu 2 root 1458 0.0 0.0 2644 88 ttyS2 D 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 root 1459 0.0 0.0 2644 88 ttyS2 D 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 root 1460 0.0 0.0 2644 88 ttyS2 D 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 root 1461 0.0 0.0 2644 88 ttyS2 D 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 root 1462 0.0 0.0 2644 88 ttyS2 D 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 root 1463 0.0 0.0 2644 88 ttyS2 D 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 root 1464 0.0 0.0 2644 88 ttyS2 D 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 root 1465 0.0 0.0 2644 88 ttyS2 D 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 root 1466 0.0 0.0 2644 88 ttyS2 D 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 root 1467 0.0 0.0 2644 88 ttyS2 D 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 root 1469 0.0 0.0 2644 88 ttyS2 D 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 root 1470 0.0 0.0 2644 88 ttyS2 D 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 root 1471 0.0 0.0 2644 88 ttyS2 D 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 root 1472 0.0 0.0 2644 88 ttyS2 D 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 root 1473 0.0 0.0 2644 88 ttyS2 D 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 root 1474 0.0 0.0 2644 88 ttyS2 D 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 root 1475 0.0 0.0 2644 88 ttyS2 D 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 root 1476 0.0 0.0 2644 88 ttyS2 D 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 root 1477 0.0 0.0 2644 88 ttyS2 D 19:03 0:00 /ota/ltp20220121/opt/ltp/testcases/bin/genload --io 200 .......

metan-ucw commented 2 years ago

Because they are waiting for I/O. It's normal to have processes in D state when there is heavy I/O happening.