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2026-08-19 - 10:51

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, slot #6

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 rack8slot6s.osadl.org (updated Wed Aug 19, 2026 00:43:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304929910491048,1cyclictest22669-21kworker/0:0+events23:25:330
304929910421041,1cyclictest14718-21kworker/0:1+events20:22:560
305069910391037,2cyclictest8896-21turbostat20:59:553
305069910371036,1cyclictest4365-21kworker/3:1+events23:54:483
304979910321031,1cyclictest3722-21kworker/1:2+events19:22:361
304979910301029,1cyclictest22920-21kworker/1:1+events20:12:331
304929910291026,3cyclictest31928-21turbostat23:09:550
304929910291026,3cyclictest31928-21turbostat23:09:550
305029910281027,1cyclictest26076-21kworker/2:1+events19:55:512
305069910241023,1cyclictest28238-21kworker/3:0+events22:48:493
304929910231022,1cyclictest10884-21kworker/0:0+events21:00:440
305069910221019,3cyclictest8814-21turbostat00:24:543
305069910211020,1cyclictest4365-21kworker/3:1+events23:30:223
304979910201019,1cyclictest3722-21kworker/1:2+events19:49:161
304929910201018,2cyclictest14718-21kworker/0:1+events20:27:110
304929910181015,3cyclictest19903-21turbostat21:19:550
304929910141012,2cyclictest7409-21turbostat22:44:560
305069910131012,1cyclictest10101-21kworker/3:0+events21:54:343
305029910101009,1cyclictest3093-21kworker/2:0+events20:41:272
305029910081007,1cyclictest5404-21kworker/2:1+events00:03:262
305029910071005,2cyclictest22839-21turbostat21:54:562
305029910041003,1cyclictest3093-21kworker/2:0+events20:50:212
305069910011000,1cyclictest11189-21kworker/3:0+events23:19:003
30492991001998,1cyclictest5627-21kworker/0:1+events22:56:510
3050299998997,1cyclictest5404-21kworker/2:1+events00:10:432
3050299998995,1cyclictest5404-21kworker/2:1+events00:07:102
3050699997996,1cyclictest4910-21kworker/3:1+events21:59:063
3050699997996,1cyclictest10137-21kworker/3:2+events22:10:423
3050699997996,1cyclictest10101-21kworker/3:0+events21:49:253
3050699997996,1cyclictest10101-21kworker/3:0+events21:38:413
3050299997996,1cyclictest5404-21kworker/2:1+events00:24:042
3050699996994,2cyclictest32750-21turbostat22:04:553
3050699995994,1cyclictest8990-21kworker/3:0+events23:47:083
3050699995994,1cyclictest3905-21kworker/3:2+events23:43:163
3049799995994,1cyclictest3722-21kworker/1:2+events20:06:491
3050699994993,1cyclictest18617-21kworker/3:2+events21:28:153
3050299993992,1cyclictest14845-21kworker/2:2+events19:54:542
3050699992991,1cyclictest28238-21kworker/3:0+events22:32:453
3050299992991,1cyclictest14845-21kworker/2:2+events20:46:282
3049799992990,2cyclictest819-21turbostat20:39:551
3049299992991,1cyclictest408-21kworker/0:2+events21:14:330
3049299992991,1cyclictest19919-21kworker/0:2+events00:26:480
3050699991990,1cyclictest4365-21kworker/3:1+events23:39:443
3050299991989,2cyclictest5404-21kworker/2:1+events00:16:042
3050699990990,0cyclictest18617-21kworker/3:2+events21:30:443
3049299990989,1cyclictest22379-21kworker/0:0+events22:06:460
3050699989989,0cyclictest10137-21kworker/3:2+events22:19:203
3050699989988,1cyclictest4365-21kworker/3:1+events23:20:553
3050699989987,2cyclictest14950-21turbostat21:14:553
3049799989988,1cyclictest12371-21kworker/1:0+events19:42:521
3049299987986,1cyclictest19919-21kworker/0:2+events00:39:210
3050699986985,1cyclictest8990-21kworker/3:0+events23:58:333
3050699985984,1cyclictest4910-21kworker/3:1+events22:24:243
3050699985982,2cyclictest17177-21turbostat22:54:553
3049299984983,1cyclictest408-21kworker/0:2+events21:07:570
3049299984983,1cyclictest24679-21kworker/0:2+events20:19:230
3050699983982,1cyclictest4910-21kworker/3:1+events21:41:273
3049299983982,1cyclictest5627-21kworker/0:1+events22:36:080
3049299983981,1cyclictest2536-21kworker/0:1+events20:36:580
3050699982981,1cyclictest4365-21kworker/3:1+events23:13:363
3050699982981,1cyclictest18617-21kworker/3:2+events21:20:553
3050699981980,1cyclictest28238-21kworker/3:0+events22:28:403
3049299981980,1cyclictest19919-21kworker/0:2+events00:31:060
3050299979978,1cyclictest14845-21kworker/2:2+events20:55:222
3050699975974,1cyclictest4357-21kworker/3:0+events20:00:203
3049299974973,1cyclictest30401-21kworker/0:0+events20:33:500
3049799973972,1cyclictest5773-21kworker/1:0+events19:34:321
3049799973971,2cyclictest5301-21turbostat22:09:551
3050699948947,1cyclictest12609-21turbostat19:49:553
3049299934932,2cyclictest4448-21turbostat23:14:560
3049799924924,0cyclictest26906-21kworker/1:1+events19:19:021
3049799921920,1cyclictest5773-21kworker/1:0+events19:36:041
3049799920919,1cyclictest27259-21kworker/1:2+events23:08:291
3049799920919,1cyclictest27259-21kworker/1:2+events23:08:281
3049799917916,1cyclictest10476-21kworker/1:0+events19:14:031
3049799915914,1cyclictest20651-21kworker/1:0+events23:03:141
3049799910909,1cyclictest3722-21kworker/1:2+events19:28:211
3050699908906,2cyclictest21999-21turbostat22:59:563
3049299908906,2cyclictest16624-21turbostat19:59:550
3050299898895,3cyclictest14325-21turbostat23:24:552
3050699891889,2cyclictest22693-21turbostat20:14:553
3049799872867,3cyclictest29428-21turbostat23:39:551
3049299679677,2cyclictest29951-21turbostat22:34:550
3050699663660,3cyclictest16624-21turbostat19:59:563
3049299647645,2cyclictest22693-21turbostat20:14:550
3050299623620,3cyclictest819-21turbostat20:39:552
3049799600596,4cyclictest21999-21turbostat22:59:561
3049299594592,2cyclictest8896-21turbostat20:59:550
3050699592590,2cyclictest5301-21turbostat22:09:563
3050699582580,2cyclictest31928-21turbostat23:09:563
3050699582580,2cyclictest31928-21turbostat23:09:553
3049299575574,1cyclictest8814-21turbostat00:24:540
3050699570569,1cyclictest19903-21turbostat21:19:563
3050699567566,1cyclictest7409-21turbostat22:44:563
3049799566563,3cyclictest18639-21turbostat20:04:561
3049299550549,1cyclictest32750-21turbostat22:04:550
3050699544543,1cyclictest19250-21turbostat23:29:563
3049299538537,1cyclictest17177-21turbostat22:54:550
3049299516513,3cyclictest14325-21turbostat23:24:550
3050299515513,2cyclictest12609-21turbostat19:49:552
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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