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2026-05-07 - 13:12

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Click here to display the system's profile data or here to proceed to next system.
Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack0slot4s.osadl.org (updated Thu May 07, 2026 00:46:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21729592371351,13sleep50-21swapper/519:07:1611
21728802365326,13sleep40-21swapper/419:06:1010
21731022364345,12sleep60-21swapper/619:09:0912
21729392355315,13sleep80-21swapper/819:07:0214
21729052355318,13sleep100-21swapper/1019:06:312
21729152354333,14sleep30-21swapper/319:06:409
21731212353332,14sleep70-21swapper/719:09:2713
21728672353332,14sleep140-21swapper/1419:06:046
21730922351330,14sleep20-21swapper/219:09:048
21730862351330,14sleep130-21swapper/1319:09:005
21729102350330,13sleep150-21swapper/1519:06:367
21731442349330,12sleep120-21swapper/1219:09:484
21729132348328,13sleep10-21swapper/119:06:381
21730842346326,13sleep110-21swapper/1119:08:583
21730822346326,13sleep90-21swapper/919:08:5515
21729312344324,13sleep00-21swapper/019:06:550
21735549912163,28cyclictest0-21swapper/320:10:009
2173549999840,30cyclictest0-21swapper/220:10:018
2173544999722,75cyclictest0-21swapper/020:10:000
2173575999434,30cyclictest0-21swapper/1020:10:012
2173546999134,30cyclictest0-21swapper/120:10:001
217356799829,44cyclictest0-21swapper/820:10:0014
2173582997113,30cyclictest0-21swapper/1320:10:025
2173561995411,42cyclictest0-21swapper/620:10:0212
2173559995023,27cyclictest0-21swapper/520:10:0211
217358699459,11cyclictest0-21swapper/1420:14:386
217358699448,11cyclictest0-21swapper/1421:31:316
217358699437,11cyclictest0-21swapper/1421:09:336
2173570994140,1cyclictest3318-21Xorg20:10:0115
2173577993837,1cyclictest3318-21Xorg20:10:003
217358999370,23cyclictest0-21swapper/1520:10:017
2173586993510,25cyclictest0-21swapper/1422:59:236
2173586993510,25cyclictest0-21swapper/1422:59:226
2173586993510,25cyclictest0-21swapper/1422:37:256
2173586993510,25cyclictest0-21swapper/1422:04:286
2173586993510,25cyclictest0-21swapper/1421:42:306
2173586993510,25cyclictest0-21swapper/1421:20:326
2173586993510,25cyclictest0-21swapper/1420:47:356
2173586993510,25cyclictest0-21swapper/1419:52:406
2173586993510,25cyclictest0-21swapper/1419:52:396
2173586993510,25cyclictest0-21swapper/1419:19:436
2173586993510,0cyclictest0-21swapper/1419:41:416
217358699349,25cyclictest0-21swapper/1422:15:276
217358699349,25cyclictest0-21swapper/1420:25:366
217358699349,25cyclictest0-21swapper/1420:03:396
217358699349,0cyclictest0-21swapper/1423:54:186
217358699349,0cyclictest0-21swapper/1421:53:296
217358699349,0cyclictest0-21swapper/1420:58:346
2173586993433,1cyclictest2395285-21kworker/u32:5+events_unbound22:50:176
2173586993433,1cyclictest2395285-21kworker/u32:5+events_unbound22:50:176
2173586993333,0cyclictest0-21swapper/1421:56:266
2173586993332,1cyclictest1491rcuc/1423:13:296
217357599330,32cyclictest0-21swapper/1021:33:352
217354699330,30cyclictest0-21swapper/119:56:391
217354699330,30cyclictest0-21swapper/119:56:381
217358699328,11cyclictest0-21swapper/1400:27:156
217358699327,25cyclictest0-21swapper/1419:30:416
217358699327,0cyclictest0-21swapper/1422:26:266
217358699326,26cyclictest0-21swapper/1421:17:096
2173586993232,0cyclictest0-21swapper/1419:23:596
2173586993232,0cyclictest0-21swapper/1400:23:036
217358099320,30cyclictest0-21swapper/1220:10:004
217356799320,32cyclictest0-21swapper/820:15:1514
217355699320,32cyclictest681-21jbd2/nvme0n1p2-823:50:1710
217354999320,29cyclictest0-21swapper/222:55:058
217354999320,29cyclictest0-21swapper/222:55:058
217354999320,29cyclictest0-21swapper/220:27:568
2173586993131,0cyclictest0-21swapper/1423:35:336
2173580993130,1cyclictest1774-21snmpd21:13:114
217358099310,30cyclictest0-21swapper/1222:16:224
217357799310,30cyclictest0-21swapper/1119:17:113
217357799310,30cyclictest0-21swapper/1100:07:103
2173575993130,1cyclictest2339513-21kworker/10:1+events22:58:572
2173575993130,1cyclictest2339513-21kworker/10:1+events22:58:572
2173575993129,1cyclictest2449292-21kworker/10:1+events23:52:522
2173575993129,1cyclictest2449292-21kworker/10:1+events23:43:272
2173575993129,1cyclictest2449292-21kworker/10:1+events23:31:272
2173575993129,1cyclictest2449292-21kworker/10:1+events23:29:152
2173575993129,1cyclictest2449292-21kworker/10:1+events00:34:392
2173575993129,1cyclictest2422069-21kworker/10:0+events23:20:412
2173575993129,1cyclictest2422069-21kworker/10:0+events23:11:392
2173575993129,1cyclictest2422069-21kworker/10:0+events23:06:472
2173575993129,1cyclictest2339513-21kworker/10:1+events22:41:412
2173575993129,1cyclictest2303443-21kworker/10:0+events21:43:212
2173575993128,3cyclictest0-21swapper/1021:48:092
217357099310,30cyclictest0-21swapper/922:40:1415
217356799310,30cyclictest0-21swapper/823:13:4514
217356799310,30cyclictest0-21swapper/821:30:0514
217356599310,30cyclictest0-21swapper/723:05:1613
2173559993130,1cyclictest1774-21snmpd00:04:4611
217355699310,31cyclictest0-21swapper/420:09:5910
217355499310,30cyclictest0-21swapper/319:19:349
217354999310,30cyclictest0-21swapper/223:31:538
217354999310,30cyclictest0-21swapper/219:27:428
217354999310,28cyclictest0-21swapper/219:55:368
217354999310,28cyclictest0-21swapper/219:55:368
2173546993128,3cyclictest0-21swapper/122:57:261
2173546993128,3cyclictest0-21swapper/122:57:261
2173546993127,4cyclictest1774-21snmpd00:07:311
217354699310,30cyclictest0-21swapper/122:47:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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