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2026-09-20 - 17:56

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 Sun Sep 20, 2026 12:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
177892111100,6sleep30-21swapper/307:06:203
18032211087,18sleep00-21swapper/007:09:250
16285210998,6sleep20-21swapper/207:05:062
17354210683,17sleep10-21swapper/107:05:541
124182850,0sleep00-21swapper/009:54:580
278852800,0sleep20-21swapper/208:51:032
144532760,0sleep00-21swapper/011:39:070
245672750,1sleep30-21swapper/311:50:013
165552720,0sleep30-21swapper/309:25:073
325552710,0sleep30-21swapper/311:57:503
205442700,1sleep1221ktimersoftd/112:20:011
186472700,0sleep10-21swapper/108:30:151
31312610,1sleep20-21swapper/209:45:102
18104993128,2cyclictest14845-21kworker/u8:110:08:042
18102992926,2cyclictest27817-21kworker/u8:011:53:040
18102992825,2cyclictest14845-21kworker/u8:110:10:040
18104992724,2cyclictest21163-21kworker/u8:210:44:012
18104992623,2cyclictest8269-21kworker/u8:012:09:042
18104992623,2cyclictest4466-21kworker/u8:209:19:042
18104992623,2cyclictest26280-21kworker/u8:009:42:052
18104992623,2cyclictest15242-21kworker/u8:112:16:042
18104992623,2cyclictest14845-21kworker/u8:110:02:042
18104992623,2cyclictest14845-21kworker/u8:109:50:052
18104992620,5cyclictest28597-21munin-node2
18104992522,2cyclictest8269-21kworker/u8:012:10:042
18104992522,2cyclictest26280-21kworker/u8:009:39:042
18104992421,2cyclictest7156-21kworker/u8:110:36:012
18104992421,2cyclictest6861-21kworker/u8:211:41:042
18104992421,2cyclictest4466-21kworker/u8:209:28:052
18104992421,2cyclictest32112-21kworker/u8:011:27:042
18104992421,2cyclictest13404-21kworker/u8:010:32:012
18102992421,2cyclictest21163-21kworker/u8:210:47:040
18104992320,2cyclictest28516-21kworker/u8:007:54:012
18104992320,2cyclictest22184-21kworker/u8:311:58:012
18104992320,2cyclictest22184-21kworker/u8:311:49:042
18104992319,2cyclictest30271-21kworker/u8:112:31:042
1810499230,18cyclictest0-21swapper/210:47:042
18102992320,2cyclictest26280-21kworker/u8:009:43:040
18102992320,2cyclictest22184-21kworker/u8:311:47:040
62482220,1sleep2301ktimersoftd/210:55:402
18104992219,2cyclictest7156-21kworker/u8:110:25:042
18104992219,2cyclictest7156-21kworker/u8:110:24:042
18104992219,2cyclictest31777-21kworker/u8:011:00:042
18104992219,2cyclictest26059-21kworker/u8:111:14:042
18104992219,2cyclictest26059-21kworker/u8:111:05:042
18104992219,2cyclictest15242-21kworker/u8:112:20:052
18102992219,2cyclictest24012-21kworker/u8:207:34:040
18102992219,2cyclictest14845-21kworker/u8:109:38:010
1810299220,18cyclictest0-21swapper/010:08:040
18104992118,2cyclictest32112-21kworker/u8:011:30:042
18104992118,2cyclictest29557-21kworker/u8:107:44:042
18104992118,2cyclictest26059-21kworker/u8:110:53:042
18104992118,2cyclictest12520-21kworker/u8:108:17:042
1810499210,18cyclictest0-21swapper/207:34:042
18102992118,2cyclictest6861-21kworker/u8:211:34:040
18102992118,2cyclictest4466-21kworker/u8:209:27:040
18102992118,2cyclictest13404-21kworker/u8:010:32:050
18104992017,2cyclictest28760-21kworker/u8:109:09:042
18104992017,2cyclictest17558-21kworker/u8:210:11:042
18102992017,2cyclictest8269-21kworker/u8:012:08:050
18102992017,2cyclictest26059-21kworker/u8:111:20:040
18102992017,2cyclictest22184-21kworker/u8:312:27:040
18102992017,2cyclictest17558-21kworker/u8:210:29:040
18104991916,2cyclictest26500-21kworker/u8:007:16:042
1810499190,2cyclictest0-21swapper/212:27:042
1810499190,2cyclictest0-21swapper/211:20:042
18102991916,2cyclictest23859-21kworker/u8:012:37:040
18102991916,2cyclictest15242-21kworker/u8:112:19:040
18102991916,2cyclictest14845-21kworker/u8:110:01:040
18102991916,2cyclictest13318-21kworker/u8:011:40:040
18104991815,2cyclictest8502-21kworker/u8:208:25:042
18104991815,2cyclictest28516-21kworker/u8:007:39:042
18104991815,2cyclictest26059-21kworker/u8:111:35:042
18104991815,2cyclictest22611-21kworker/u8:208:47:042
1810499180,5cyclictest0-21swapper/212:35:042
1810499180,2cyclictest0-21swapper/208:36:052
18102991815,2cyclictest22184-21kworker/u8:311:56:040
18102991815,2cyclictest18070-21kworker/u8:008:36:050
18102991815,2cyclictest14845-21kworker/u8:109:49:040
18102991815,2cyclictest12520-21kworker/u8:108:41:040
18104991714,2cyclictest5894-21kworker/u8:107:58:042
18104991714,2cyclictest29557-21kworker/u8:107:20:042
18102991714,2cyclictest8502-21kworker/u8:208:21:040
1810299170,16cyclictest0-21swapper/012:10:040
1810499160,13cyclictest0-21swapper/211:53:042
1810399161,3cyclictest2293-21munin-node1
1810399161,3cyclictest0-21swapper/108:40:161
1810399161,13cyclictest292062sleep109:37:551
1810399160,14cyclictest791-21awk09:05:151
18102991613,2cyclictest26059-21kworker/u8:110:54:050
18102991613,2cyclictest23859-21kworker/u8:012:24:040
18102991613,2cyclictest11219-21kworker/u8:211:06:040
1810299160,2cyclictest0-21swapper/009:19:040
1810299160,15cyclictest0-21swapper/011:27:040
18105991511,2cyclictest0-21swapper/311:14:073
1810599150,13cyclictest1994-21diskmemload11:35:153
18104991512,2cyclictest26106-21kworker/u8:009:01:042
1810399151,2cyclictest0-21swapper/109:41:351
1810399151,12cyclictest8248-21munin-node1
1810399151,12cyclictest4985-21ssh10:20:171
1810399151,12cyclictest22460-21sendmail-mta11:16:311
1810399150,13cyclictest0-21swapper/109:25:451
18102991512,2cyclictest26106-21kworker/u8:009:05:040
18102991512,2cyclictest24012-21kworker/u8:207:35:040
18102991512,2cyclictest24012-21kworker/u8:207:24:040
1810299150,2cyclictest0-21swapper/010:36:010
1810299150,13cyclictest0-21swapper/007:44:560
18105991411,2cyclictest0-21swapper/310:05:133
1810599140,12cyclictest1994-21diskmemload09:23:443
1810599140,12cyclictest0-21swapper/308:15:143
18104991410,2cyclictest17203-21date10:00:002
1810499140,12cyclictest27378-21ssh11:18:402
1810399149,3cyclictest24354-21apt-get11:50:061
1810399141,12cyclictest18101-21cyclictest12:25:561
18103991411,2cyclictest0-21swapper/111:03:351
18103991411,2cyclictest0-21swapper/109:00:161
18103991411,2cyclictest0-21swapper/108:20:121
1810399141,11cyclictest3649-21snmpd11:47:581
1810399141,11cyclictest0-21swapper/108:00:401
1810399140,3cyclictest32037-21ssh11:23:301
1810399140,3cyclictest15010-21cut10:30:511
1810399140,3cyclictest0-21swapper/111:34:511
1810399140,2cyclictest274-21jbd2/sda1-810:15:391
1810399140,2cyclictest0-21swapper/112:33:461
1810399140,2cyclictest0-21swapper/110:13:351
1810399140,2cyclictest0-21swapper/109:46:021
1810399140,13cyclictest0-21swapper/111:06:451
1810399140,13cyclictest0-21swapper/109:50:151
1810399140,12cyclictest207150irq/24-eth110:27:051
1810399140,12cyclictest1994-21diskmemload10:55:231
1810399140,12cyclictest0-21swapper/108:10:131
18102991411,2cyclictest26106-21kworker/u8:008:55:040
18102991411,2cyclictest26106-21kworker/u8:008:54:040
1810299141,12cyclictest25587-1kworker/0:2H10:24:030
18102991410,2cyclictest31899-21timerandwakeup12:31:040
1810299140,2cyclictest0-21swapper/010:44:050
1810299140,12cyclictest0-21swapper/011:11:020
245882130,3sleep00-21swapper/009:33:100
18105991310,2cyclictest0-21swapper/312:34:073
18105991310,2cyclictest0-21swapper/312:16:083
18105991310,2cyclictest0-21swapper/312:14:223
18105991310,2cyclictest0-21swapper/311:54:583
18105991310,2cyclictest0-21swapper/311:40:123
18105991310,2cyclictest0-21swapper/311:24:203
18105991310,2cyclictest0-21swapper/310:51:013
18105991310,2cyclictest0-21swapper/309:33:493
18105991310,2cyclictest0-21swapper/309:15:393
1810599130,2cyclictest0-21swapper/308:55:133
1810599130,12cyclictest10003-21ssh09:51:033
1810599130,12cyclictest0-21swapper/311:33:303
1810599130,12cyclictest0-21swapper/310:46:043
1810599130,12cyclictest0-21swapper/310:03:283
1810599130,12cyclictest0-21swapper/309:45:073
1810599130,11cyclictest0-21swapper/311:03:183
18104991310,2cyclictest29557-21kworker/u8:107:12:012
18104991310,2cyclictest0-21swapper/210:15:412
18104991310,2cyclictest0-21swapper/209:10:292
18104991310,2cyclictest0-21swapper/208:30:172
1810499130,2cyclictest0-21swapper/209:34:472
1810499130,2cyclictest0-21swapper/209:20:172
1810499130,2cyclictest0-21swapper/207:48:042
1810399138,3cyclictest0-21swapper/111:12:191
1810399132,3cyclictest0-21swapper/112:00:121
18103991310,2cyclictest11773-21ssh11:35:321
18103991310,2cyclictest0-21swapper/112:35:001
18103991310,2cyclictest0-21swapper/112:10:221
18103991310,2cyclictest0-21swapper/111:55:261
18103991310,2cyclictest0-21swapper/110:06:051
18103991310,2cyclictest0-21swapper/110:00:121
18103991310,2cyclictest0-21swapper/109:22:251
18103991310,2cyclictest0-21swapper/108:55:151
1810399130,2cyclictest0-21swapper/111:41:551
1810399130,2cyclictest0-21swapper/111:25:101
1810399130,2cyclictest0-21swapper/109:11:101
1810399130,2cyclictest0-21swapper/108:45:201
1810399130,12cyclictest0-21swapper/112:20:361
1810399130,12cyclictest0-21swapper/110:54:341
1810399130,12cyclictest0-21swapper/110:41:551
1810399130,12cyclictest0-21swapper/109:34:441
1810399130,12cyclictest0-21swapper/109:16:541
1810399130,12cyclictest0-21swapper/108:35:141
1810399130,12cyclictest0-21swapper/107:11:051
18102991310,2cyclictest28516-21kworker/u8:008:06:040
18102991310,2cyclictest28516-21kworker/u8:007:48:040
18102991310,2cyclictest12520-21kworker/u8:108:26:040
18102991310,2cyclictest0-21swapper/012:01:460
18102991310,2cyclictest0-21swapper/011:16:510
18102991310,2cyclictest0-21swapper/007:26:030
1810299130,2cyclictest0-21swapper/011:00:040
1810299130,2cyclictest0-21swapper/009:13:450
1810299130,12cyclictest0-21swapper/010:55:360
1810299130,12cyclictest0-21swapper/009:55:240
1810299130,12cyclictest0-21swapper/009:21:020
1810599129,2cyclictest26235-21latency_hist07:30:003
1810599129,2cyclictest0-21swapper/311:25:123
1810599129,2cyclictest0-21swapper/310:43:443
1810599129,2cyclictest0-21swapper/310:36:403
1810599129,2cyclictest0-21swapper/309:37:013
1810599129,2cyclictest0-21swapper/309:11:193
1810599129,2cyclictest0-21swapper/307:15:123
1810599120,2cyclictest27992-21ssh12:26:593
1810599120,2cyclictest0-21swapper/312:07:243
1810599120,2cyclictest0-21swapper/312:01:183
1810599120,2cyclictest0-21swapper/310:21:003
1810599120,2cyclictest0-21swapper/310:16:383
1810599120,11cyclictest0-21swapper/312:24:273
1810599120,11cyclictest0-21swapper/311:15:103
1810599120,11cyclictest0-21swapper/311:05:303
1810599120,11cyclictest0-21swapper/310:55:443
1810599120,11cyclictest0-21swapper/310:29:573
1810599120,11cyclictest0-21swapper/309:55:303
1810599120,11cyclictest0-21swapper/309:43:403
1810599120,10cyclictest3649-21snmpd08:34:273
1810499120,2cyclictest0-21swapper/208:06:042
1810499120,11cyclictest0-21swapper/212:00:062
1810399129,2cyclictest0-21swapper/110:47:561
1810399129,2cyclictest0-21swapper/110:35:111
1810399127,3cyclictest0-21swapper/107:30:151
1810399121,9cyclictest0-21swapper/107:40:131
1810399121,3cyclictest14287-21munin-run08:20:001
1810399120,2cyclictest0-21swapper/109:55:431
1810399120,1cyclictest0-21swapper/107:20:151
1810399120,11cyclictest0-21swapper/107:45:141
1810299129,2cyclictest5894-21kworker/u8:108:01:040
1810299129,2cyclictest29557-21kworker/u8:107:11:040
1810299129,2cyclictest0-21swapper/009:00:130
1810299129,2cyclictest0-21swapper/007:56:010
1810299120,2cyclictest0-21swapper/007:50:010
1810299120,11cyclictest0-21swapper/010:16:340
1810299120,11cyclictest0-21swapper/008:30:320
258202111,6sleep30-21swapper/308:46:043
1810599118,2cyclictest31146-21ethtool07:40:153
1810599118,2cyclictest26432-21apt-get07:30:133
1810599118,2cyclictest21321-21memory08:35:173
1810599118,2cyclictest0-21swapper/312:36:023
1810599110,10cyclictest0-21swapper/308:04:593
1810499110,2cyclictest0-21swapper/208:01:042
1810399118,2cyclictest0-21swapper/108:25:241
1810399118,2cyclictest0-21swapper/108:06:551
1810399118,2cyclictest0-21swapper/107:25:171
1810399111,8cyclictest0-21swapper/107:55:161
1810399110,9cyclictest0-21swapper/108:50:151
1810399110,3cyclictest0-21swapper/107:15:181
1810399110,2cyclictest0-21swapper/107:35:021
1810299118,2cyclictest22611-21kworker/u8:208:49:040
1810299110,10cyclictest0-21swapper/007:16:040
164762110,2sleep30-21swapper/310:32:423
1810599107,2cyclictest0-21swapper/309:04:583
1810599107,2cyclictest0-21swapper/308:51:023
1810599107,2cyclictest0-21swapper/308:23:213
1810599107,2cyclictest0-21swapper/307:50:003
1810599103,5cyclictest3688-21Xorg08:09:593
1810599100,9cyclictest0-21swapper/310:11:383
1810599100,9cyclictest0-21swapper/307:36:283
1810599100,2cyclictest0-21swapper/307:14:073
1810499107,2cyclictest0-21swapper/208:43:402
1810499100,9cyclictest0-21swapper/208:13:402
1810299100,3cyclictest13326-21grep08:15:180
181059996,2cyclictest0-21swapper/308:10:253
181059996,2cyclictest0-21swapper/307:52:593
181049990,8cyclictest0-21swapper/208:24:062
181059985,2cyclictest0-21swapper/309:05:083
181059984,2cyclictest22543-21telnet07:20:133
181059981,3cyclictest17194-21iostat_ios08:25:173
181059980,7cyclictest0-21swapper/308:40:253
181059980,6cyclictest4690-21cpuspeed_turbos07:55:153
181049981,5cyclictest24672-21grep07:25:132
181029974,2cyclictest10475-21munin-node0
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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