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2026-09-23 - 21:45

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 Wed Sep 23, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17724212096,19sleep00-21swapper/007:08:370
16357212097,15sleep10-21swapper/107:05:141
17659211493,15sleep30-21swapper/307:07:483
17558211494,15sleep20-21swapper/207:06:312
149202840,0sleep00-21swapper/009:23:040
72642790,1sleep2301ktimersoftd/212:09:132
160932740,0sleep20-21swapper/211:08:122
4972660,0sleep30-21swapper/310:51:053
17861993633,2cyclictest25842-21kworker/u8:211:19:042
17862993531,3cyclictest30077-21kworker/u8:112:38:043
17861993532,2cyclictest25842-21kworker/u8:211:20:042
17862993428,5cyclictest14259-21ssh09:22:013
17861993431,2cyclictest25081-21kworker/u8:012:33:042
17860993431,2cyclictest18105-21kworker/u8:309:38:041
17862993330,2cyclictest9592-21kworker/u8:112:12:043
17862993330,2cyclictest6229-21kworker/u8:210:23:043
17862993330,2cyclictest23317-21kworker/u8:110:42:053
17862993330,2cyclictest20266-21kworker/u8:112:28:043
17861993330,2cyclictest9592-21kworker/u8:112:13:042
17861993330,2cyclictest8616-21kworker/u8:010:38:012
17861993330,2cyclictest6229-21kworker/u8:210:28:042
17861993330,2cyclictest28689-21kworker/u8:112:03:042
17861993330,2cyclictest28689-21kworker/u8:111:59:042
17861993330,2cyclictest18105-21kworker/u8:309:28:042
17861993330,2cyclictest15618-21kworker/u8:209:32:042
1785999330,18cyclictest0-21swapper/008:25:110
17862993229,2cyclictest8616-21kworker/u8:009:58:053
1786299320,17cyclictest0-21swapper/309:38:043
17861993229,2cyclictest8423-21kworker/u8:211:12:052
17861993229,2cyclictest8423-21kworker/u8:211:02:042
17861993229,2cyclictest29194-21kworker/u8:010:53:042
17861993229,2cyclictest29194-21kworker/u8:010:48:012
17861993229,2cyclictest25842-21kworker/u8:211:49:042
17861993229,2cyclictest25842-21kworker/u8:211:34:042
17861993229,2cyclictest25842-21kworker/u8:211:29:042
17861993229,2cyclictest23317-21kworker/u8:110:43:042
17861993229,2cyclictest21959-21kworker/u8:012:19:042
17861993229,2cyclictest15998-21kworker/u8:111:43:042
17861993229,2cyclictest14449-21kworker/u8:212:24:002
17862993128,2cyclictest25842-21kworker/u8:211:52:053
17862993128,2cyclictest21717-21kworker/u8:210:13:043
17861993128,2cyclictest8616-21kworker/u8:010:31:042
17861993128,2cyclictest8616-21kworker/u8:010:18:042
17861993128,2cyclictest6229-21kworker/u8:210:24:042
17861993128,2cyclictest23317-21kworker/u8:110:57:042
17861993128,2cyclictest21717-21kworker/u8:210:11:042
17861993128,2cyclictest1457-21kworker/u8:009:20:042
17860993128,2cyclictest14702-21kworker/u8:110:05:041
250132300,0sleep20-21swapper/211:53:012
17862993027,2cyclictest5365-21kworker/u8:312:09:043
17862993027,2cyclictest29194-21kworker/u8:011:03:043
17862993027,2cyclictest28689-21kworker/u8:111:58:043
17862993027,2cyclictest23317-21kworker/u8:110:59:043
17862993027,2cyclictest21959-21kworker/u8:012:22:043
17861993027,2cyclictest32503-21kworker/u8:109:42:042
17862992926,2cyclictest8616-21kworker/u8:010:32:043
17862992926,2cyclictest5271-21kworker/u8:209:18:043
17862992926,2cyclictest29194-21kworker/u8:011:18:043
17862992926,2cyclictest29194-21kworker/u8:011:08:043
17862992926,2cyclictest25842-21kworker/u8:211:40:013
17861992926,2cyclictest17685-21kworker/u8:207:37:042
17861992926,2cyclictest17685-21kworker/u8:207:37:042
17861992926,2cyclictest1457-21kworker/u8:009:10:052
1786199290,14cyclictest0-21swapper/210:03:042
17862992825,2cyclictest8616-21kworker/u8:010:19:043
17862992825,2cyclictest8616-21kworker/u8:010:04:013
17862992825,2cyclictest29194-21kworker/u8:011:24:013
17862992825,2cyclictest21717-21kworker/u8:210:07:043
17862992825,2cyclictest18105-21kworker/u8:309:50:043
17862992825,2cyclictest15618-21kworker/u8:209:34:043
17862992825,2cyclictest15618-21kworker/u8:209:27:043
1786199289,18cyclictest0-21swapper/208:05:132
17861992825,2cyclictest17685-21kworker/u8:207:15:042
17861992825,2cyclictest15888-21kworker/u8:008:34:042
17860992825,2cyclictest29194-21kworker/u8:010:49:041
17860992825,2cyclictest21959-21kworker/u8:012:02:041
17860992825,2cyclictest15998-21kworker/u8:111:44:011
17862992724,2cyclictest30377-21kworker/u8:109:12:053
17862992724,2cyclictest25842-21kworker/u8:211:47:043
17861992724,2cyclictest8295-21kworker/u8:208:47:042
17861992724,2cyclictest8295-21kworker/u8:208:26:042
17861992724,2cyclictest8295-21kworker/u8:208:19:042
17861992724,2cyclictest5271-21kworker/u8:209:16:042
17861992724,2cyclictest1457-21kworker/u8:009:07:042
1786199270,18cyclictest0-21swapper/210:08:042
17860992724,2cyclictest6229-21kworker/u8:210:29:041
17860992724,2cyclictest29194-21kworker/u8:011:28:051
17860992724,2cyclictest29194-21kworker/u8:011:06:041
17862992623,2cyclictest32503-21kworker/u8:109:45:043
17861992623,2cyclictest30322-21kworker/u8:007:51:042
17860992623,2cyclictest8616-21kworker/u8:010:37:041
17860992623,2cyclictest8616-21kworker/u8:010:33:041
17860992623,2cyclictest8616-21kworker/u8:009:54:051
17860992623,2cyclictest29194-21kworker/u8:011:21:041
17860992623,2cyclictest29194-21kworker/u8:011:17:041
17860992623,2cyclictest21717-21kworker/u8:210:10:041
17860992623,2cyclictest20266-21kworker/u8:112:27:041
17860992623,2cyclictest18105-21kworker/u8:309:48:041
17862992522,2cyclictest17685-21kworker/u8:207:47:043
17862992521,3cyclictest4058-21kworker/u8:108:01:043
17861992522,2cyclictest8295-21kworker/u8:208:55:042
17861992522,2cyclictest8295-21kworker/u8:208:37:042
17861992522,2cyclictest4058-21kworker/u8:108:13:042
17861992522,2cyclictest17685-21kworker/u8:207:46:052
17860992522,2cyclictest5365-21kworker/u8:312:07:041
17860992522,2cyclictest25842-21kworker/u8:211:48:041
17860992522,2cyclictest15618-21kworker/u8:209:30:041
17860992522,2cyclictest14702-21kworker/u8:109:57:041
17860992522,2cyclictest14449-21kworker/u8:212:39:041
17862992421,2cyclictest8295-21kworker/u8:208:59:043
17862992421,2cyclictest8295-21kworker/u8:208:46:013
17862992421,2cyclictest29194-21kworker/u8:011:27:043
17862992421,2cyclictest25842-21kworker/u8:211:31:043
17862992421,2cyclictest13604-21kworker/u8:107:17:043
17860992421,2cyclictest8423-21kworker/u8:211:12:011
17860992421,2cyclictest25842-21kworker/u8:211:33:041
17860992421,2cyclictest17685-21kworker/u8:207:26:041
100712240,0sleep00-21swapper/011:36:040
17862992320,2cyclictest30322-21kworker/u8:007:52:043
1786199233,2cyclictest3152-21nscd09:53:042
17861992320,2cyclictest8295-21kworker/u8:208:41:042
17861992320,2cyclictest17685-21kworker/u8:207:14:042
17860992320,2cyclictest8616-21kworker/u8:010:02:041
17860992320,2cyclictest32503-21kworker/u8:109:44:041
17860992320,2cyclictest25081-21kworker/u8:012:31:041
17862992219,2cyclictest8295-21kworker/u8:208:08:043
17862992219,2cyclictest4058-21kworker/u8:107:56:043
17862992219,2cyclictest30377-21kworker/u8:109:04:043
17862992219,2cyclictest24216-21kworker/u8:007:32:043
17862992219,2cyclictest23345-21kworker/u8:108:44:013
17862992219,2cyclictest17685-21kworker/u8:207:27:043
1786199221,19cyclictest0-21swapper/207:20:122
1786199220,18cyclictest0-21swapper/209:46:042
17860992219,2cyclictest8295-21kworker/u8:208:46:051
17860992219,2cyclictest4058-21kworker/u8:107:57:041
17860992219,2cyclictest30848-21kworker/u8:110:16:041
17860992219,2cyclictest29194-21kworker/u8:011:36:051
17860992219,2cyclictest29194-21kworker/u8:011:04:041
17860992219,2cyclictest17685-21kworker/u8:207:46:011
17860992219,2cyclictest15888-21kworker/u8:008:35:041
17860992219,2cyclictest14449-21kworker/u8:212:24:051
17862992118,2cyclictest8295-21kworker/u8:208:50:043
17862992118,2cyclictest8295-21kworker/u8:208:38:013
17862992118,2cyclictest8295-21kworker/u8:208:29:043
17862992118,2cyclictest4058-21kworker/u8:108:23:043
17862992118,2cyclictest4058-21kworker/u8:108:11:043
17862992118,2cyclictest30322-21kworker/u8:007:43:043
17862992118,2cyclictest30322-21kworker/u8:007:43:043
17862992118,2cyclictest25842-21kworker/u8:211:35:043
17862992118,2cyclictest13604-21kworker/u8:107:24:043
1786299211,18cyclictest0-21swapper/310:36:043
1786299210,18cyclictest0-21swapper/312:31:043
1786299210,18cyclictest0-21swapper/310:49:043
1786299210,11cyclictest0-21swapper/309:44:043
17860992118,2cyclictest5271-21kworker/u8:209:13:041
17860992118,2cyclictest4058-21kworker/u8:108:05:041
17860992118,2cyclictest1457-21kworker/u8:009:08:041
17862992017,2cyclictest17685-21kworker/u8:207:12:013
17861992017,2cyclictest0-21swapper/207:40:112
17861992017,2cyclictest0-21swapper/207:40:112
1786199200,3cyclictest0-21swapper/209:56:042
1786199200,18cyclictest0-21swapper/209:02:042
17860992017,2cyclictest8295-21kworker/u8:208:10:011
17860992017,2cyclictest30322-21kworker/u8:007:41:041
17860992017,2cyclictest30322-21kworker/u8:007:41:041
1786099200,3cyclictest0-21swapper/112:12:041
1786099200,18cyclictest0-21swapper/111:50:041
17859992017,2cyclictest0-21swapper/008:05:130
17862991916,2cyclictest15888-21kworker/u8:008:33:043
1786299190,2cyclictest0-21swapper/312:00:043
1786299190,2cyclictest0-21swapper/311:12:013
1786299190,2cyclictest0-21swapper/310:29:043
1786199190,2cyclictest0-21swapper/212:37:042
1786199190,2cyclictest0-21swapper/211:37:042
1786199190,2cyclictest0-21swapper/209:36:042
1786199190,2cyclictest0-21swapper/207:58:042
1786199190,2cyclictest0-21swapper/207:25:042
17860991916,2cyclictest8295-21kworker/u8:208:27:041
17860991916,2cyclictest4058-21kworker/u8:108:22:041
17860991916,2cyclictest4058-21kworker/u8:108:04:011
17860991916,2cyclictest24216-21kworker/u8:007:33:041
1786099190,2cyclictest0-21swapper/111:55:041
1786099190,2cyclictest0-21swapper/110:42:051
1786099190,2cyclictest0-21swapper/110:23:041
1786099190,2cyclictest0-21swapper/109:26:041
1786099190,2cyclictest0-21swapper/109:19:041
1786099190,17cyclictest0-21swapper/110:50:041
17860991815,2cyclictest8295-21kworker/u8:208:54:041
17860991815,2cyclictest27856-21kworker/u8:107:39:041
17860991815,2cyclictest27856-21kworker/u8:107:39:041
17860991815,2cyclictest25995-21kworker/u8:008:57:041
17860991815,2cyclictest13604-21kworker/u8:107:20:011
1786299170,2cyclictest0-21swapper/309:09:043
1786099170,2cyclictest0-21swapper/107:19:041
17861991510,3cyclictest26771-21fschecks_count08:50:152
1786099150,2cyclictest0-21swapper/107:52:041
1785999150,3cyclictest31197-21ps07:40:180
1785999150,3cyclictest31197-21ps07:40:180
1785999150,3cyclictest27858-21ssh10:11:050
211532140,2sleep00-21swapper/010:04:540
1786299140,2cyclictest0-21swapper/307:36:043
1786299140,2cyclictest0-21swapper/307:36:043
1786299140,13cyclictest0-21swapper/312:15:183
17861991411,2cyclictest0-21swapper/212:26:092
1786099140,2cyclictest0-21swapper/108:44:011
17859991411,2cyclictest0-21swapper/010:20:520
1785999141,11cyclictest12484-21apt-get12:15:120
17859991410,2cyclictest12211-21apt-get08:15:120
1785999140,3cyclictest6343-21ssh11:32:200
1785999140,3cyclictest20770-21grep08:35:140
1785999140,2cyclictest0-21swapper/009:51:420
1785999140,2cyclictest0-21swapper/009:44:420
1785999140,13cyclictest0-21swapper/012:06:220
1785999140,13cyclictest0-21swapper/012:01:020
1785999140,13cyclictest0-21swapper/011:07:030
1785999140,13cyclictest0-21swapper/009:46:120
1785999140,12cyclictest22691-21sed11:50:210
1785999140,12cyclictest14943-21munin-node0
1785999140,12cyclictest0-21swapper/011:41:180
1785999140,12cyclictest0-21swapper/011:04:250
1785999140,12cyclictest0-21swapper/010:57:240
1785999140,12cyclictest0-21swapper/009:29:150
17861991310,2cyclictest0-21swapper/207:30:192
17860991310,2cyclictest30377-21kworker/u8:109:01:041
17860991310,2cyclictest0-21swapper/109:21:231
1786099130,2cyclictest0-21swapper/110:59:041
17859991310,2cyclictest1720-21diskmemload11:14:160
17859991310,2cyclictest0-21swapper/012:25:240
17859991310,2cyclictest0-21swapper/012:20:290
17859991310,2cyclictest0-21swapper/012:11:370
17859991310,2cyclictest0-21swapper/011:21:260
17859991310,2cyclictest0-21swapper/010:25:470
17859991310,2cyclictest0-21swapper/009:58:120
17859991310,2cyclictest0-21swapper/009:34:380
17859991310,2cyclictest0-21swapper/009:13:550
1785999130,2cyclictest0-21swapper/011:55:580
1785999130,2cyclictest0-21swapper/011:19:020
1785999130,12cyclictest13604-21kworker/u8:107:25:040
1785999130,12cyclictest13604-21kworker/u8:107:16:040
1785999130,12cyclictest0-21swapper/012:32:050
1785999130,12cyclictest0-21swapper/010:45:120
1785999130,12cyclictest0-21swapper/010:40:020
1785999130,12cyclictest0-21swapper/010:35:420
1785999130,12cyclictest0-21swapper/010:30:160
1785999130,11cyclictest1720-21diskmemload10:50:070
1785999130,11cyclictest0-21swapper/012:35:030
1785999130,11cyclictest0-21swapper/009:15:100
1786199129,2cyclictest0-21swapper/208:00:112
1786199120,11cyclictest0-21swapper/208:24:562
1786099120,2cyclictest0-21swapper/112:17:231
1786099120,11cyclictest0-21swapper/108:33:041
1785999129,2cyclictest0-21swapper/011:25:150
1785999129,2cyclictest0-21swapper/010:06:020
1785999129,2cyclictest0-21swapper/008:31:060
1785999129,2cyclictest0-21swapper/007:56:010
1785999120,11cyclictest0-21swapper/011:46:560
1785999120,11cyclictest0-21swapper/010:15:150
1785999120,11cyclictest0-21swapper/009:35:030
1785999120,11cyclictest0-21swapper/009:06:020
1785999120,11cyclictest0-21swapper/007:10:170
1786299113,3cyclictest27450jbd2/sda1-808:15:193
1786099118,2cyclictest0-21swapper/108:15:041
1786099110,3cyclictest18072-21munin-node1
1785999118,2cyclictest0-21swapper/009:00:130
1785999112,6cyclictest0-21swapper/008:01:590
1785999111,3cyclictest32679-21fschecks_count07:45:140
1785999110,2cyclictest0-21swapper/008:54:540
1785999110,10cyclictest0-21swapper/008:46:040
1785999107,2cyclictest0-21swapper/008:40:140
1785999102,7cyclictest0-21swapper/007:37:020
1785999102,7cyclictest0-21swapper/007:37:010
1785999102,2cyclictest0-21swapper/007:30:040
1785999101,6cyclictest0-21swapper/008:13:370
178599996,2cyclictest0-21swapper/008:55:520
178599996,2cyclictest0-21swapper/007:20:170
178599995,2cyclictest0-21swapper/007:55:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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