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2026-09-17 - 22:01

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, 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 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
Compare latency of primary with shadow system
Characteristics of the highest latencies:
System rack3slot6s.osadl.org (updated Thu Sep 17, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8399211099,6sleep30-21swapper/307:07:203
8330211099,6sleep10-21swapper/107:06:271
7900210985,18sleep00-21swapper/007:05:580
8490210584,16sleep20-21swapper/207:08:312
135692780,0sleep20-21swapper/211:47:392
214602750,0sleep10-21swapper/112:30:151
43782730,1sleep0101ktimersoftd/010:30:130
205822730,1sleep20-21swapper/212:30:002
296392720,0sleep10-21swapper/110:22:091
296392720,0sleep10-21swapper/110:22:091
108582710,1sleep1221ktimersoftd/107:15:101
143192660,0sleep00-21swapper/009:31:370
8635993920,18cyclictest18766-21copy07:35:011
8634993616,18cyclictest0-21swapper/008:20:140
863499360,18cyclictest0-21swapper/010:10:120
8636993330,2cyclictest12220-21kworker/u8:010:18:042
8636993330,2cyclictest12220-21kworker/u8:010:07:042
8637993127,2cyclictest25157-21kworker/u8:009:18:043
863799310,18cyclictest0-21swapper/312:18:013
8636993128,2cyclictest9908-21kworker/u8:012:19:042
8636993128,2cyclictest24202-21kworker/u8:012:39:042
8636993128,2cyclictest17170-21kworker/u8:110:13:042
8636993027,2cyclictest20661-21kworker/u8:011:30:022
8636993027,2cyclictest1715-21kworker/u8:110:02:052
8636993027,2cyclictest1715-21kworker/u8:109:54:052
863699300,18cyclictest0-21swapper/210:34:042
8637992926,2cyclictest5175-21kworker/u8:109:28:043
8637992926,2cyclictest25157-21kworker/u8:009:31:053
8637992926,2cyclictest1715-21kworker/u8:110:04:043
8637992926,2cyclictest15408-21ssh10:07:043
8637992925,2cyclictest15192-21kworker/u8:110:42:013
8636992926,2cyclictest4784-21kworker/u8:211:18:012
8636992926,2cyclictest26245-21kworker/u8:012:08:052
8636992926,2cyclictest24400-21kworker/u8:210:29:042
8637992825,2cyclictest20661-21kworker/u8:011:24:043
8637992825,2cyclictest17170-21kworker/u8:110:11:043
8636992825,2cyclictest9113-21kworker/u8:210:39:042
8636992825,2cyclictest27119-21kworker/u8:011:01:042
8636992825,2cyclictest26514-21kworker/u8:112:00:042
8636992825,2cyclictest14724-21kworker/u8:008:58:042
863699280,18cyclictest0-21swapper/209:48:042
8637992724,2cyclictest320-21kworker/u8:211:40:043
8637992724,2cyclictest24400-21kworker/u8:210:28:053
8637992724,2cyclictest16073-21kworker/u8:212:27:043
8637992724,2cyclictest12220-21kworker/u8:010:19:043
863799270,15cyclictest0-21swapper/311:00:103
8636992724,2cyclictest735-21kworker/u8:207:41:052
8636992724,2cyclictest5175-21kworker/u8:109:24:042
8636992724,2cyclictest3508-21kworker/u8:010:47:042
8636992724,2cyclictest10793-21kworker/u8:209:33:042
863699270,18cyclictest0-21swapper/211:27:042
8637992623,2cyclictest26245-21kworker/u8:012:07:043
8637992623,2cyclictest12981-21kworker/u8:211:56:053
8637992623,2cyclictest10793-21kworker/u8:209:37:043
8636992623,2cyclictest8945-21kworker/u8:107:17:042
8636992623,2cyclictest735-21kworker/u8:207:50:042
8636992623,2cyclictest735-21kworker/u8:207:35:042
8636992623,2cyclictest26514-21kworker/u8:112:10:012
8636992623,2cyclictest12552-21kworker/u8:007:24:012
863699260,18cyclictest0-21swapper/210:50:042
863499265,19cyclictest1048-21ssh11:35:110
8637992522,2cyclictest735-21kworker/u8:207:44:043
8637992522,2cyclictest4784-21kworker/u8:211:11:043
8637992522,2cyclictest26245-21kworker/u8:012:03:043
8637992522,2cyclictest25157-21kworker/u8:009:49:043
8637992522,2cyclictest24400-21kworker/u8:210:21:043
8637992522,2cyclictest24400-21kworker/u8:210:21:043
8637992522,2cyclictest15192-21kworker/u8:110:54:043
8637992522,2cyclictest12981-21kworker/u8:211:49:043
8637992520,3cyclictest735-21kworker/u8:207:46:043
863799250,18cyclictest0-21swapper/310:59:043
863799250,15cyclictest0-21swapper/309:55:043
8636992522,2cyclictest9113-21kworker/u8:210:40:042
863699250,18cyclictest0-21swapper/209:40:042
8637992421,2cyclictest25157-21kworker/u8:009:20:043
8637992421,2cyclictest20661-21kworker/u8:011:32:043
8636992421,2cyclictest735-21kworker/u8:208:04:042
8636992421,2cyclictest29296-21kworker/u8:108:15:042
8636992421,2cyclictest29296-21kworker/u8:108:06:062
8636992421,2cyclictest21270-21kworker/u8:007:58:042
8636992421,2cyclictest16073-21kworker/u8:212:31:042
8637992320,2cyclictest735-21kworker/u8:207:54:043
8637992320,2cyclictest4784-21kworker/u8:211:16:043
8637992320,2cyclictest21658-21kworker/u8:109:41:043
8637992320,2cyclictest12552-21kworker/u8:007:25:043
8636992320,2cyclictest7067-21kworker/u8:108:45:042
8636992320,2cyclictest14724-21kworker/u8:008:51:042
863699230,8cyclictest0-21swapper/211:14:042
863499230,22cyclictest0-21swapper/012:15:120
118382230,2sleep011-21rcuc/011:45:260
8637992219,2cyclictest4634-21kworker/u8:208:19:043
8637992219,2cyclictest29079-21kworker/u8:209:50:043
863799220,18cyclictest0-21swapper/311:37:043
8636992219,2cyclictest8945-21kworker/u8:107:12:042
8636992219,2cyclictest4634-21kworker/u8:208:20:012
863699220,18cyclictest0-21swapper/209:11:042
863699220,18cyclictest0-21swapper/209:05:042
8637992118,2cyclictest14724-21kworker/u8:008:55:043
8637992118,2cyclictest12552-21kworker/u8:007:23:043
863799210,18cyclictest0-21swapper/312:22:043
8636992118,2cyclictest735-21kworker/u8:207:31:042
8636992118,2cyclictest29296-21kworker/u8:108:11:042
863599210,2cyclictest0-21swapper/111:55:091
8634992117,2cyclictest0-21swapper/007:50:090
239892210,1sleep00-21swapper/011:25:020
8637992017,2cyclictest735-21kworker/u8:207:32:043
8637992017,2cyclictest7067-21kworker/u8:108:39:043
8637992017,2cyclictest21270-21kworker/u8:007:59:043
8637992017,2cyclictest17167-21kworker/u8:209:02:043
8637992017,2cyclictest14724-21kworker/u8:008:47:043
863799200,15cyclictest0-21swapper/307:18:053
863599200,18cyclictest0-21swapper/111:40:111
863599200,18cyclictest0-21swapper/108:50:121
8634992017,2cyclictest0-21swapper/007:40:090
8637991916,2cyclictest7067-21kworker/u8:108:41:043
8637991916,2cyclictest7067-21kworker/u8:108:29:043
8637991916,2cyclictest4634-21kworker/u8:208:32:013
8637991916,2cyclictest26245-21kworker/u8:012:11:043
863799190,2cyclictest0-21swapper/312:38:043
863799190,2cyclictest0-21swapper/311:25:043
863799190,2cyclictest0-21swapper/311:05:043
863799190,2cyclictest0-21swapper/310:45:043
863799190,2cyclictest0-21swapper/310:35:043
863799190,2cyclictest0-21swapper/310:33:043
863799190,2cyclictest0-21swapper/309:10:043
863699190,2cyclictest0-21swapper/211:50:042
863699190,2cyclictest0-21swapper/211:21:042
863699190,2cyclictest0-21swapper/210:57:042
863699190,2cyclictest0-21swapper/209:35:042
863699190,2cyclictest0-21swapper/208:36:042
8637991815,2cyclictest735-21kworker/u8:208:01:043
8637991815,2cyclictest735-21kworker/u8:207:39:043
8637991815,2cyclictest29296-21kworker/u8:108:10:043
8637991815,2cyclictest14724-21kworker/u8:008:50:013
863699180,2cyclictest0-21swapper/208:43:042
235142170,0sleep10-21swapper/110:15:311
121372170,1sleep00-21swapper/012:20:160
8637991611,3cyclictest5552-21fschecks_time08:20:163
863799160,15cyclictest0-21swapper/309:09:043
8636991611,3cyclictest27027-21ssh10:20:102
8636991611,3cyclictest27027-21ssh10:20:102
863699160,2cyclictest0-21swapper/208:25:042
863599161,3cyclictest0-21swapper/112:20:001
863699152,7cyclictest0-21swapper/207:50:002
8636991512,2cyclictest4634-21kworker/u8:208:32:062
8635991510,3cyclictest24937-21diskmemload09:46:051
863599150,3cyclictest21757-21fschecks_time07:40:121
863599150,13cyclictest0-21swapper/111:10:111
863599150,13cyclictest0-21swapper/109:25:131
199712151,2sleep024937-21diskmemload11:55:080
863799140,2cyclictest0-21swapper/312:30:053
863799140,2cyclictest0-21swapper/307:13:043
863699142,6cyclictest0-21swapper/211:10:022
863699141,11cyclictest22188-21ssh11:56:242
863699140,2cyclictest0-21swapper/211:41:502
863699140,12cyclictest0-21swapper/209:01:002
863599149,3cyclictest4170-21munin-node1
8635991411,2cyclictest207150irq/24-eth109:36:171
8635991411,2cyclictest0-21swapper/109:10:491
863599141,11cyclictest0-21swapper/111:34:301
863599140,2cyclictest0-21swapper/111:45:491
863599140,2cyclictest0-21swapper/110:11:041
863599140,13cyclictest0-21swapper/111:25:291
863599140,12cyclictest0-21swapper/112:20:171
863599140,12cyclictest0-21swapper/110:55:111
8634991411,2cyclictest0-21swapper/008:40:200
82622140,2sleep00-21swapper/011:41:370
8637991310,2cyclictest0-21swapper/311:54:283
863699130,12cyclictest0-21swapper/207:25:392
863599136,5cyclictest27383-21sed12:36:041
863599132,5cyclictest0-21swapper/110:45:011
863599131,9cyclictest0-21swapper/107:55:171
863599131,2cyclictest207150irq/24-eth111:05:211
863599131,10cyclictest0-21swapper/109:51:011
8635991310,2cyclictest0-21swapper/111:50:201
8635991310,2cyclictest0-21swapper/111:20:591
8635991310,2cyclictest0-21swapper/111:15:151
8635991310,2cyclictest0-21swapper/110:31:391
8635991310,2cyclictest0-21swapper/109:00:181
863599130,2cyclictest0-21swapper/112:11:261
863599130,2cyclictest0-21swapper/110:50:051
863599130,2cyclictest0-21swapper/108:00:181
863599130,1cyclictest0-21swapper/109:22:001
863599130,12cyclictest0-21swapper/111:37:591
863599130,12cyclictest0-21swapper/110:06:191
863599130,12cyclictest0-21swapper/110:01:391
863599130,12cyclictest0-21swapper/109:15:591
863599130,11cyclictest0-21swapper/107:10:501
863499132,8cyclictest4556-21metacity12:33:590
8634991310,2cyclictest0-21swapper/007:55:170
863499130,3cyclictest32545-21latency10:25:150
863499130,11cyclictest0-21swapper/012:25:120
276662130,2sleep00-21swapper/012:02:500
245242130,2sleep00-21swapper/011:25:140
863799129,2cyclictest0-21swapper/308:06:143
863699129,2cyclictest0-21swapper/209:16:562
863699128,2cyclictest0-21swapper/209:55:422
863699120,2cyclictest0-21swapper/211:35:152
863699120,11cyclictest0-21swapper/212:20:162
863699120,11cyclictest0-21swapper/209:26:032
863599129,2cyclictest0-21swapper/112:06:451
863599127,3cyclictest3728-21runrttasks08:25:161
863599127,3cyclictest0-21swapper/109:32:121
863599123,5cyclictest0-21swapper/108:37:571
863599121,9cyclictest0-21swapper/108:10:131
863599120,2cyclictest0-21swapper/112:00:081
863599120,2cyclictest0-21swapper/110:45:411
863599120,2cyclictest0-21swapper/108:45:181
863599120,2cyclictest0-21swapper/107:35:191
863599120,11cyclictest0-21swapper/112:25:301
863599120,11cyclictest0-21swapper/110:25:171
863599120,11cyclictest0-21swapper/108:20:151
863599120,10cyclictest24937-21diskmemload09:40:561
863599120,10cyclictest0-21swapper/111:00:351
863599120,10cyclictest0-21swapper/108:15:401
863499129,2cyclictest0-21swapper/012:35:200
863499129,2cyclictest0-21swapper/009:35:190
863499122,7cyclictest0-21swapper/008:14:580
863499120,2cyclictest0-21swapper/008:50:130
863499120,11cyclictest0-21swapper/008:36:040
130452120,2sleep10-21swapper/110:39:331
110472120,1sleep00-21swapper/010:02:400
863599111,3cyclictest0-21swapper/107:25:141
863599110,9cyclictest0-21swapper/107:20:181
863599110,3cyclictest0-21swapper/108:31:011
863499118,2cyclictest0-21swapper/011:00:140
863499118,2cyclictest0-21swapper/009:16:570
863499117,2cyclictest30977-21ssh09:50:110
863499116,3cyclictest14962-21sh10:40:390
863499115,2cyclictest0-21swapper/008:31:040
863499112,6cyclictest4562-21gdm-simple-gree07:38:580
863499112,5cyclictest0-21swapper/010:23:180
863499112,5cyclictest0-21swapper/010:23:180
863499111,8cyclictest9797-21ssh10:35:200
863499111,3cyclictest23961-21latency07:45:160
863499110,9cyclictest29296-21kworker/u8:108:06:010
863499110,9cyclictest21017-21kworker/u8:210:55:040
863499110,9cyclictest0-21swapper/008:25:110
863499110,3cyclictest18927-21latency_hist07:35:020
863499110,10cyclictest17167-21kworker/u8:209:22:050
863499110,10cyclictest0-21swapper/011:51:300
863499110,10cyclictest0-21swapper/011:32:590
863499110,10cyclictest0-21swapper/011:19:100
74952110,2sleep00-21swapper/011:06:380
60542110,1sleep00-21swapper/012:14:480
244972110,1sleep00-21swapper/010:50:420
863599107,2cyclictest0-21swapper/108:55:131
863599107,2cyclictest0-21swapper/107:50:141
863599106,2cyclictest0-21swapper/108:05:111
863599101,7cyclictest23142-21munin-node1
863599101,3cyclictest23699-21fschecks_time07:45:141
863599100,2cyclictest0-21swapper/108:40:131
863499105,3cyclictest14335-21head07:21:040
863499103,6cyclictest0-21swapper/009:06:020
863499101,7cyclictest29446-21aten2.4_r3power12:05:120
863499101,5cyclictest0-21swapper/009:58:140
863499101,5cyclictest0-21swapper/009:15:000
863499100,9cyclictest0-21swapper/010:46:350
863499100,9cyclictest0-21swapper/009:46:320
863499100,9cyclictest0-21swapper/008:03:490
863499100,8cyclictest0-21swapper/010:15:160
863499100,8cyclictest0-21swapper/009:25:540
863499100,8cyclictest0-21swapper/008:55:110
863499100,7cyclictest0-21swapper/009:41:580
863499100,7cyclictest0-21swapper/008:46:590
863499100,7cyclictest0-21swapper/007:11:010
140722100,7sleep00-21swapper/010:05:370
86349996,2cyclictest0-21swapper/011:10:390
86349994,3cyclictest3182-21lldpd09:04:400
86349990,3cyclictest11299-21fschecks_count07:15:130
86349990,2cyclictest0-21swapper/008:15:130
86349990,2cyclictest0-21swapper/007:26:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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