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2026-08-21 - 23:03

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 Fri Aug 21, 2026 12:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28604210998,6sleep00-21swapper/007:05:510
28584210998,6sleep30-21swapper/307:05:423
29229210887,16sleep20-21swapper/207:08:502
29076210886,17sleep10-21swapper/107:06:521
198012830,1sleep00-21swapper/012:34:050
314332690,0sleep10-21swapper/110:00:181
283892530,1sleep20-21swapper/209:25:122
29352992925,2cyclictest21131-21kworker/u8:010:34:023
29350992825,2cyclictest8693-21kworker/u8:212:26:051
29352992724,2cyclictest26684-21kworker/u8:111:08:053
29350992724,2cyclictest30931-21kworker/u8:109:28:061
29349992724,2cyclictest14301-21kworker/u8:111:22:050
29352992623,2cyclictest11031-21kworker/u8:009:24:043
29351992623,2cyclictest24214-21kworker/u8:011:48:052
29351992623,2cyclictest20047-21kworker/u8:312:29:042
29350992623,2cyclictest2231-21kworker/u8:210:46:051
29349992623,2cyclictest14771-21kworker/u8:009:54:040
29352992522,2cyclictest4247-21kworker/u8:209:42:043
29352992522,2cyclictest23568-21kworker/u8:012:39:053
29352992522,2cyclictest2231-21kworker/u8:210:49:043
29352992522,2cyclictest19903-21kworker/u8:310:13:053
29352992521,3cyclictest2146-21kworker/u8:011:24:023
29351992522,2cyclictest24881-21kworker/u8:109:58:042
29351992522,2cyclictest23568-21kworker/u8:012:38:062
29351992522,2cyclictest21131-21kworker/u8:010:30:052
29351992522,2cyclictest18184-21kworker/u8:311:36:042
29351992522,2cyclictest15477-21kworker/u8:110:29:042
29351992522,2cyclictest14771-21kworker/u8:009:51:052
29350992522,2cyclictest2231-21kworker/u8:211:03:031
29350992522,2cyclictest15477-21kworker/u8:110:18:021
29350992522,2cyclictest11031-21kworker/u8:009:16:061
29349992522,2cyclictest9263-21kworker/u8:109:47:040
29349992522,2cyclictest26684-21kworker/u8:111:02:040
29349992522,2cyclictest15477-21kworker/u8:110:18:060
29352992421,2cyclictest19903-21kworker/u8:310:20:043
29352992421,2cyclictest11031-21kworker/u8:009:32:053
29352992419,3cyclictest30377-21kworker/u8:010:08:063
29351992421,2cyclictest11031-21kworker/u8:009:20:022
29350992421,2cyclictest8217-21kworker/u8:211:19:051
29350992421,2cyclictest2231-21kworker/u8:210:37:041
29350992421,2cyclictest19903-21kworker/u8:310:07:051
29349992421,2cyclictest9263-21kworker/u8:109:41:050
29349992421,2cyclictest2146-21kworker/u8:011:16:050
29352992320,2cyclictest3120-21kworker/u8:111:53:053
29352992320,2cyclictest2146-21kworker/u8:011:12:043
29352992320,2cyclictest21131-21kworker/u8:010:35:043
29352992320,2cyclictest20047-21kworker/u8:312:08:053
29352992320,2cyclictest14275-21kworker/u8:012:30:063
29351992320,2cyclictest8217-21kworker/u8:211:30:052
29351992320,2cyclictest30377-21kworker/u8:010:09:052
29351992320,2cyclictest30377-21kworker/u8:010:04:052
29351992320,2cyclictest26684-21kworker/u8:111:11:032
29351992320,2cyclictest20047-21kworker/u8:312:31:052
29351992320,2cyclictest19903-21kworker/u8:310:12:052
29351992320,2cyclictest14771-21kworker/u8:009:48:062
29350992320,2cyclictest16299-21kworker/u8:010:55:041
29350992320,2cyclictest15477-21kworker/u8:110:27:051
29350992320,2cyclictest14771-21kworker/u8:009:50:041
29349992320,2cyclictest3120-21kworker/u8:111:54:040
29349992320,2cyclictest2231-21kworker/u8:210:44:050
29349992320,2cyclictest11031-21kworker/u8:009:19:040
29352992219,2cyclictest9263-21kworker/u8:109:49:053
29352992219,2cyclictest3612-21kworker/u8:112:21:053
29352992219,2cyclictest30377-21kworker/u8:010:16:053
29352992219,2cyclictest24214-21kworker/u8:011:33:053
29352992219,2cyclictest2231-21kworker/u8:210:58:053
29352992219,2cyclictest16299-21kworker/u8:011:01:053
29352992219,2cyclictest14771-21kworker/u8:009:52:053
29352992219,2cyclictest11031-21kworker/u8:009:27:053
29352992218,3cyclictest13769-21kworker/u8:209:15:053
29351992219,2cyclictest19903-21kworker/u8:310:21:042
29351992219,2cyclictest11031-21kworker/u8:009:36:062
29350992219,2cyclictest4247-21kworker/u8:209:37:051
29350992219,2cyclictest27233-21kworker/u8:007:15:041
29350992219,2cyclictest24214-21kworker/u8:011:37:051
29350992219,2cyclictest18159-21kworker/u8:012:15:041
29350992219,2cyclictest16299-21kworker/u8:010:53:041
2935099220,18cyclictest0-21swapper/112:39:051
29349992219,2cyclictest3612-21kworker/u8:112:19:040
29349992219,2cyclictest2231-21kworker/u8:210:48:050
29349992219,2cyclictest21131-21kworker/u8:010:34:060
29349992219,2cyclictest20047-21kworker/u8:312:12:050
29349992219,2cyclictest18159-21kworker/u8:012:07:050
29349992219,2cyclictest15477-21kworker/u8:110:22:010
29349992219,2cyclictest12529-21kworker/u8:211:59:050
29349992219,2cyclictest11031-21kworker/u8:009:26:010
29349992219,2cyclictest11031-21kworker/u8:009:22:050
29352992118,2cyclictest24881-21kworker/u8:109:57:033
29352992118,2cyclictest24214-21kworker/u8:011:46:023
29352992118,2cyclictest20047-21kworker/u8:312:16:053
29352992118,2cyclictest20047-21kworker/u8:312:11:053
29352992118,2cyclictest20047-21kworker/u8:312:03:043
29351992118,2cyclictest8217-21kworker/u8:211:29:052
29351992118,2cyclictest2231-21kworker/u8:210:45:042
29351992118,2cyclictest12529-21kworker/u8:211:56:022
2935199210,18cyclictest0-21swapper/210:18:062
2935099212,17cyclictest22747-21kworker/1:012:21:051
29350992118,2cyclictest3120-21kworker/u8:111:47:041
29350992118,2cyclictest24214-21kworker/u8:011:50:011
29350992118,2cyclictest21131-21kworker/u8:010:42:051
29350992118,2cyclictest20047-21kworker/u8:312:02:051
29350992118,2cyclictest19903-21kworker/u8:310:11:031
29350992118,2cyclictest11031-21kworker/u8:009:34:041
29349992118,2cyclictest30931-21kworker/u8:109:30:040
29349992118,2cyclictest24214-21kworker/u8:011:34:050
29349992118,2cyclictest2231-21kworker/u8:211:06:050
29349992118,2cyclictest2146-21kworker/u8:011:14:050
29349992118,2cyclictest16299-21kworker/u8:010:56:050
29349992118,2cyclictest14301-21kworker/u8:111:25:040
2934999210,18cyclictest0-21swapper/012:29:050
2934999210,18cyclictest0-21swapper/011:48:050
77072200,0sleep20-21swapper/211:15:142
29352992017,2cyclictest9263-21kworker/u8:109:39:053
29352992017,2cyclictest7476-21kworker/u8:007:45:043
29352992017,2cyclictest30543-21kworker/u8:211:41:053
29352992017,2cyclictest29879-21kworker/u8:111:38:013
29352992017,2cyclictest2231-21kworker/u8:210:41:053
29352992017,2cyclictest18184-21kworker/u8:311:28:053
29352992017,2cyclictest12529-21kworker/u8:211:57:053
29351992017,2cyclictest29558-21kworker/u8:107:34:042
29351992017,2cyclictest21131-21kworker/u8:010:40:052
29351992017,2cyclictest16990-21kworker/u8:208:31:042
2935199200,14cyclictest0-21swapper/209:41:052
29350992017,2cyclictest8217-21kworker/u8:211:20:021
29350992017,2cyclictest14771-21kworker/u8:009:44:041
2935099200,18cyclictest0-21swapper/111:12:051
29349992017,2cyclictest24214-21kworker/u8:011:44:060
29349992017,2cyclictest20047-21kworker/u8:312:20:050
29349992017,2cyclictest18159-21kworker/u8:012:04:050
29349992017,2cyclictest14924-21kworker/u8:108:01:040
29352991916,2cyclictest11306-21kworker/u8:110:50:023
29352991916,2cyclictest11031-21kworker/u8:009:14:043
29351991916,2cyclictest7476-21kworker/u8:007:43:042
29351991916,2cyclictest20047-21kworker/u8:312:17:052
29351991916,2cyclictest16990-21kworker/u8:208:05:052
29351991916,2cyclictest16990-21kworker/u8:208:02:042
29351991916,2cyclictest16990-21kworker/u8:207:57:052
2935199190,2cyclictest13324-21diskmemload12:12:052
2935199190,2cyclictest0-21swapper/212:07:052
2935199190,2cyclictest0-21swapper/211:08:052
2935199190,2cyclictest0-21swapper/210:35:042
2935199190,2cyclictest0-21swapper/209:32:052
29350991916,2cyclictest7594-21kworker/u8:209:01:051
29350991916,2cyclictest18607-21kworker/u8:112:33:051
29350991916,2cyclictest16990-21kworker/u8:208:08:011
2935099190,6cyclictest0-21swapper/112:08:051
2935099190,2cyclictest30890-21sendmail-mta10:34:021
2935099190,2cyclictest13324-21diskmemload11:08:051
2935099190,2cyclictest0-21swapper/110:20:051
2935099190,2cyclictest0-21swapper/109:20:051
2934999190,2cyclictest0-21swapper/012:38:060
2934999190,2cyclictest0-21swapper/010:35:030
29352991815,2cyclictest7594-21kworker/u8:208:58:043
29352991815,2cyclictest24881-21kworker/u8:110:00:053
29352991815,2cyclictest14924-21kworker/u8:107:56:033
29351991815,2cyclictest16990-21kworker/u8:208:38:042
29351991815,2cyclictest16990-21kworker/u8:208:38:042
29351991815,2cyclictest11031-21kworker/u8:009:02:042
2935199180,2cyclictest0-21swapper/211:53:052
2935199180,2cyclictest0-21swapper/209:17:052
29350991815,2cyclictest7476-21kworker/u8:007:44:041
29350991815,2cyclictest5187-21kworker/u8:108:55:041
29350991815,2cyclictest29558-21kworker/u8:107:25:041
29350991815,2cyclictest16990-21kworker/u8:208:35:051
29350991815,2cyclictest16990-21kworker/u8:208:35:041
29350991815,2cyclictest14924-21kworker/u8:108:26:041
29350991815,2cyclictest14924-21kworker/u8:107:54:041
2935099180,2cyclictest0-21swapper/112:11:051
2935099180,2cyclictest0-21swapper/111:59:051
2935099180,2cyclictest0-21swapper/111:30:051
2935099180,2cyclictest0-21swapper/109:48:051
2935099180,16cyclictest0-21swapper/109:14:041
29349991815,2cyclictest5187-21kworker/u8:109:06:060
29349991815,2cyclictest29558-21kworker/u8:107:33:040
29349991815,2cyclictest27233-21kworker/u8:007:11:030
2934999180,2cyclictest0-21swapper/010:04:050
2934999180,16cyclictest0-21swapper/009:36:060
29352991714,2cyclictest29558-21kworker/u8:107:35:043
29352991714,2cyclictest29558-21kworker/u8:107:31:033
29352991714,2cyclictest27233-21kworker/u8:007:18:013
29352991714,2cyclictest14924-21kworker/u8:108:27:053
29352991714,2cyclictest14924-21kworker/u8:108:21:033
2935299170,2cyclictest0-21swapper/310:27:053
29351991714,2cyclictest27233-21kworker/u8:007:19:042
29351991714,2cyclictest16990-21kworker/u8:208:12:032
29351991714,2cyclictest14924-21kworker/u8:108:25:052
2935199171,3cyclictest0-21swapper/208:50:182
2935199170,2cyclictest0-21swapper/212:04:042
2935199170,2cyclictest0-21swapper/211:23:052
2935199170,2cyclictest0-21swapper/211:01:052
29350991714,2cyclictest29558-21kworker/u8:107:32:041
29350991714,2cyclictest18184-21kworker/u8:311:26:041
29350991714,2cyclictest16990-21kworker/u8:208:41:051
29350991714,2cyclictest16990-21kworker/u8:208:11:041
29350991714,2cyclictest11603-21kworker/u8:207:49:031
2935099170,2cyclictest0-21swapper/111:44:061
29352991613,2cyclictest29558-21kworker/u8:107:28:043
29352991613,2cyclictest27233-21kworker/u8:007:10:043
2935299160,2cyclictest0-21swapper/312:25:043
29351991613,2cyclictest16990-21kworker/u8:208:43:042
2935199160,2cyclictest0-21swapper/211:44:062
29350991613,2cyclictest27233-21kworker/u8:007:21:031
29350991613,2cyclictest16990-21kworker/u8:208:34:041
29350991613,2cyclictest16990-21kworker/u8:208:04:041
29350991613,2cyclictest11031-21kworker/u8:009:05:051
29349991613,2cyclictest7476-21kworker/u8:007:38:000
29349991613,2cyclictest27233-21kworker/u8:007:16:040
29349991613,2cyclictest16990-21kworker/u8:208:39:050
29349991613,2cyclictest16990-21kworker/u8:208:39:050
29349991613,2cyclictest16990-21kworker/u8:208:09:040
29349991613,2cyclictest16990-21kworker/u8:207:59:040
29349991613,2cyclictest14924-21kworker/u8:108:28:030
2934999160,2cyclictest0-21swapper/010:26:050
2934999160,2cyclictest0-21swapper/010:06:050
2934999160,14cyclictest0-21swapper/007:43:040
29352991512,2cyclictest7476-21kworker/u8:007:40:043
29352991512,2cyclictest5187-21kworker/u8:109:06:003
29352991512,2cyclictest5187-21kworker/u8:108:50:043
29351991512,2cyclictest5187-21kworker/u8:109:09:032
29351991512,2cyclictest14924-21kworker/u8:108:19:042
2935199150,2cyclictest0-21swapper/212:20:052
29350991512,2cyclictest16990-21kworker/u8:208:45:051
29350991512,2cyclictest14924-21kworker/u8:108:22:041
2935099150,2cyclictest0-21swapper/109:57:041
2935099150,2cyclictest0-21swapper/107:11:041
29349991512,2cyclictest7594-21kworker/u8:208:59:030
29349991512,2cyclictest16990-21kworker/u8:208:42:010
29349991512,2cyclictest14924-21kworker/u8:108:18:040
29349991512,2cyclictest0-21swapper/011:35:130
2934999150,3cyclictest6263-21memory08:50:180
2934999150,2cyclictest0-21swapper/010:14:040
2934999150,2cyclictest0-21swapper/009:58:050
2934999150,2cyclictest0-21swapper/008:31:040
29352991411,2cyclictest7594-21kworker/u8:209:00:043
29352991411,2cyclictest0-21swapper/308:11:013
2935299140,2cyclictest0-21swapper/311:15:053
2935299140,2cyclictest0-21swapper/308:31:043
2935299140,2cyclictest0-21swapper/308:03:043
29351991411,2cyclictest14924-21kworker/u8:108:20:042
2935199140,2cyclictest0-21swapper/207:11:042
29349991411,2cyclictest5187-21kworker/u8:109:10:040
29349991411,2cyclictest11603-21kworker/u8:207:46:010
29351991310,2cyclictest20859-21ssh10:55:242
29351991310,2cyclictest14812-21ssh09:10:252
29351991310,2cyclictest0-21swapper/210:54:062
29351991310,2cyclictest0-21swapper/208:55:162
2935199130,2cyclictest0-21swapper/208:45:132
2935199130,12cyclictest3184-21munin-node2
2935099131,2cyclictest16976-21apt-get07:56:381
2935099131,10cyclictest5916-21grep08:50:151
2934999130,3cyclictest0-21swapper/010:50:060
2935299129,2cyclictest27233-21kworker/u8:007:22:043
2935299129,2cyclictest16990-21kworker/u8:208:47:043
2935299129,2cyclictest16990-21kworker/u8:208:44:033
2935299129,2cyclictest0-21swapper/308:15:013
2935299120,2cyclictest0-21swapper/308:38:043
2935299120,2cyclictest0-21swapper/308:38:043
2935299120,2cyclictest0-21swapper/308:05:133
2935199129,2cyclictest7849-21fschecks_count07:35:152
2935199129,2cyclictest14924-21kworker/u8:107:52:042
2935199129,2cyclictest0-21swapper/207:46:052
2935199129,2cyclictest0-21swapper/207:23:132
2935099121,3cyclictest0-21swapper/107:35:171
2934999129,2cyclictest0-21swapper/008:20:140
2934999120,2cyclictest0-21swapper/008:12:040
2934999120,11cyclictest0-21swapper/008:45:140
2934999118,2cyclictest27233-21kworker/u8:007:20:050
2934999118,2cyclictest0-21swapper/009:04:540
2934999110,1cyclictest0-21swapper/007:28:040
2935099100,9cyclictest0-21swapper/108:15:051
151392100,2sleep00-21swapper/007:53:510
293529980,6cyclictest13452-21taskset07:50:103
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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