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2026-05-19 - 07:23

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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 rack5slot3s.osadl.org (updated Tue May 19, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2618423270,15sleep10-21swapper/119:05:111
275562242166,25sleep20-21swapper/219:06:062
278572235162,24sleep00-21swapper/019:09:580
276022202164,25sleep30-21swapper/319:06:433
27959997068,1cyclictest0-21swapper/223:41:012
251302630,3sleep10-21swapper/123:55:121
27959996158,2cyclictest0-21swapper/222:46:492
35252590,4sleep32796599cyclictest20:40:023
27959995956,2cyclictest0-21swapper/220:08:472
27959994541,3cyclictest0-21swapper/222:44:262
27959994541,3cyclictest0-21swapper/222:32:432
71632360,1sleep00-21swapper/020:45:240
2794899349,12cyclictest30132-21awk19:15:010
2795399331,26cyclictest0-21swapper/123:42:211
2796599321,6cyclictest0-21swapper/323:31:233
2794899327,12cyclictest32668-21munin-run23:00:010
108862320,4sleep30-21swapper/300:35:193
108862320,4sleep30-21swapper/300:35:183
2796599311,10cyclictest11727-21cstates23:25:123
2796599311,10cyclictest11727-21cstates23:25:123
2794899302,20cyclictest6885-21kworker/0:223:16:500
2794899302,20cyclictest32660-21kworker/0:219:19:100
2794899302,20cyclictest11858-21kworker/0:020:00:020
2794899302,13cyclictest7247-21munin-run19:35:010
2794899301,21cyclictest10250-21kworker/0:023:43:540
2795399291,6cyclictest25809-40dnf22:41:591
2794899292,20cyclictest8078-21kworker/0:221:00:260
2794899292,20cyclictest32550-21kworker/0:123:09:250
2794899292,20cyclictest16754-21kworker/0:122:39:100
2794899292,19cyclictest5997-21kworker/0:022:22:140
2794899292,19cyclictest3183-21kworker/0:120:50:110
2794899292,19cyclictest22274-21kworker/0:123:51:500
2794899292,16cyclictest28498-21kworker/0:020:29:280
2794899291,21cyclictest4780-21kworker/0:319:46:460
2794899291,21cyclictest4780-21kworker/0:319:27:060
2794899291,20cyclictest31078-21kworker/0:200:10:340
2796599287,3cyclictest0-21swapper/319:46:003
2795999281,16cyclictest0-21swapper/223:26:582
2795999281,16cyclictest0-21swapper/223:26:582
27953992812,8cyclictest5340-21crond00:25:011
2795399281,17cyclictest0-21swapper/121:13:161
2794899282,19cyclictest7338-21kworker/0:100:28:180
2794899282,19cyclictest28755-21kworker/0:000:05:340
2794899282,18cyclictest2787-21kworker/0:000:21:500
2794899281,20cyclictest32550-21kworker/0:123:11:210
2794899281,20cyclictest16754-21kworker/0:122:41:140
2794899281,20cyclictest1533-21kworker/0:121:55:220
2794899281,19cyclictest21522-21kworker/0:222:34:260
86122270,3sleep00-21swapper/019:35:260
2796599276,3cyclictest0-21swapper/319:38:083
2795399271,19cyclictest87550irq/128-enp1s0-23:45:181
2795399271,18cyclictest7175-21hddtemp_smartct22:00:171
2794899272,19cyclictest16439-21kworker/0:221:11:540
2794899272,18cyclictest28055-21kworker/0:222:52:220
2794899272,18cyclictest25339-21kworker/0:321:43:020
2794899272,18cyclictest22274-21kworker/0:100:02:580
2794899272,18cyclictest17776-21kworker/0:223:45:140
2794899272,17cyclictest10250-21kworker/0:023:30:580
2794899271,19cyclictest28498-21kworker/0:020:22:100
2794899271,19cyclictest2787-21kworker/0:000:17:420
2794899271,11cyclictest31065-21kworker/0:220:38:310
2794899270,17cyclictest11888-21kworker/0:021:08:060
2794899270,17cyclictest11888-21kworker/0:021:08:060
2796599262,21cyclictest22517-21/usr/sbin/munin23:50:203
2796599262,12cyclictest9335-21/usr/sbin/munin23:20:153
2796599261,7cyclictest0-21swapper/322:50:553
2796599260,20cyclictest0-21swapper/300:10:483
2795399262,3cyclictest87450irq/127-enp1s0-20:10:381
27953992621,2cyclictest10305-21df00:35:141
27953992621,2cyclictest10305-21df00:35:141
2795399261,6cyclictest0-21swapper/123:28:361
2795399261,6cyclictest0-21swapper/123:28:361
2795399261,18cyclictest0-21swapper/121:20:291
2795399261,17cyclictest29713-21kworker/u8:122:25:451
2795399261,17cyclictest0-21swapper/122:12:191
27953992610,8cyclictest10731-21ntpq19:40:221
2794899267,6cyclictest5997-21kworker/0:022:05:280
2794899262,15cyclictest5997-21kworker/0:022:12:400
2794899262,14cyclictest7454-21kworker/0:300:38:480
2794899262,14cyclictest7454-21kworker/0:300:38:480
27948992612,6cyclictest8078-21kworker/0:220:55:230
2794899261,19cyclictest12803-21kworker/0:222:16:420
2794899261,19cyclictest12803-21kworker/0:222:16:420
2794899261,18cyclictest29808-21kworker/0:021:50:260
2794899261,18cyclictest25830-21kworker/0:023:02:090
2794899261,18cyclictest22274-21kworker/0:123:56:180
2794899261,17cyclictest16754-21kworker/0:122:28:500
2794899260,11cyclictest24747-21kworker/0:120:18:100
2796599257,3cyclictest0-21swapper/320:01:123
2796599251,9cyclictest0-21swapper/323:39:403
27959992518,5cyclictest13919-21/usr/sbin/munin22:15:192
27959992518,5cyclictest13919-21/usr/sbin/munin22:15:192
2795399258,9cyclictest0-21swapper/121:27:221
2795399251,9cyclictest0-21swapper/123:00:401
27953992519,3cyclictest30165-21munin-node19:15:021
2795399251,17cyclictest0-21swapper/121:02:261
2795399251,16cyclictest15056-21cat22:19:561
2795399251,16cyclictest15056-21cat22:19:561
2795399251,16cyclictest0-21swapper/123:10:501
2794899252,9cyclictest2787-21kworker/0:000:31:540
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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