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2025-12-10 - 03:26

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #4

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 rack9slot4s (updated Wed Dec 10, 2025 00:59:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
251399911671150,14cyclictest0-21swapper/119:25:111
248962652607,30sleep00-21swapper/019:23:050
248962652607,30sleep00-21swapper/019:23:050
250592492446,31sleep10-21swapper/119:24:491
250592492446,31sleep10-21swapper/119:24:491
25138992321,227cyclictest0-21swapper/019:25:110
2877421330,8sleep02513899cyclictest22:45:250
2513899131125,3cyclictest0-21swapper/019:45:300
182692970,9sleep02513899cyclictest22:00:330
101252830,8sleep02513899cyclictest21:19:460
281192790,3sleep028117-21ssh23:18:500
2513999641,14cyclictest18998-21sh22:01:371
2513999615,5cyclictest0-21swapper/123:32:101
2513999575,46cyclictest0-21swapper/122:16:361
2513999572,11cyclictest0-21swapper/121:32:191
25139995720,6cyclictest1009-21grep21:10:131
2513999563,22cyclictest0-21swapper/100:00:501
2513999561,22cyclictest7223-21ssh22:23:301
2513999555,23cyclictest0-21swapper/122:31:331
2513999553,9cyclictest29562-21diskstats23:20:161
2513999552,8cyclictest29674-21ssh22:46:061
2513999552,13cyclictest0-21swapper/100:05:071
2513999543,20cyclictest0-21swapper/123:36:551
2513999542,19cyclictest19033-21ssh23:09:391
25139995421,6cyclictest15751-21ssh21:58:561
2513999542,12cyclictest0-21swapper/123:18:481
2513999541,12cyclictest0-21swapper/122:38:171
2513999539,4cyclictest0-21swapper/100:21:311
2513999537,5cyclictest0-21swapper/100:25:561
2513999534,4cyclictest0-21swapper/121:25:241
2513999533,21cyclictest0-21swapper/122:29:311
2513999532,9cyclictest0-21swapper/123:28:461
25139995310,4cyclictest0-21swapper/123:42:171
25139995310,3cyclictest0-21swapper/122:57:311
25139995217,6cyclictest19787-21watchsnmpd20:35:001
2513999521,11cyclictest21380-21ssh00:52:261
2513999518,4cyclictest0-21swapper/122:53:461
2513999518,15cyclictest0-21swapper/123:46:271
2513999512,15cyclictest0-21swapper/121:25:011
320392500,9sleep02513899cyclictest21:05:240
2513999509,15cyclictest0-21swapper/100:33:511
2513999508,16cyclictest0-21swapper/123:55:381
2513999508,16cyclictest0-21swapper/123:55:381
2513999508,15cyclictest0-21swapper/121:48:421
2513999504,23cyclictest0-21swapper/100:36:181
2513999502,16cyclictest10531-21/usr/sbin/munin20:10:351
25139995010,12cyclictest0-21swapper/121:42:581
2513999498,15cyclictest0-21swapper/122:42:001
2513999497,15cyclictest0-21swapper/100:41:181
2513999497,15cyclictest0-21swapper/100:18:491
2513999492,10cyclictest17010-21ntp_states20:25:261
2513999489,5cyclictest40950irq/93-i91520:00:321
2513999489,5cyclictest40950irq/93-i91520:00:311
2513999488,16cyclictest0-21swapper/100:48:031
2513999485,12cyclictest40950irq/93-i91522:12:031
2513999485,10cyclictest26257-21switchtime21:35:301
2513999483,20cyclictest0-21swapper/120:52:181
2513999482,20cyclictest0-21swapper/123:10:411
2513999478,15cyclictest0-21swapper/121:18:161
2513999471,8cyclictest10263-21ssh23:00:161
25139994717,6cyclictest22-21ksoftirqd/120:16:421
25139994617,5cyclictest26140-21turbostat.cron22:10:001
2513999459,14cyclictest0-21swapper/121:50:261
2513999442,8cyclictest14594-21df_inode20:20:151
25138994213,13cyclictest16397-21ntp_states21:25:280
25138994021,4cyclictest40950irq/93-i91523:35:130
82782380,8sleep02513899cyclictest00:05:180
2513899381,10cyclictest81rcu_preempt19:59:500
2513899373,21cyclictest3020-21runrttasks22:35:230
2513899371,28cyclictest40950irq/93-i91522:07:020
275592361,30sleep027570-21ssh23:51:000
2513899364,5cyclictest81rcu_preempt23:58:260
2513899364,5cyclictest81rcu_preempt23:58:260
2513899361,23cyclictest14106-21/usr/sbin/munin00:45:270
29522351,3sleep00-21swapper/021:11:230
2513899358,13cyclictest12751-21cat21:55:240
2513899356,4cyclictest81rcu_preempt23:00:250
2513899355,5cyclictest81rcu_preempt00:30:180
2513899355,4cyclictest81rcu_preempt00:40:180
2513899354,4cyclictest81rcu_preempt21:21:370
2513899353,20cyclictest0-21swapper/000:51:330
2513899353,15cyclictest0-21swapper/021:46:370
46992341,4sleep04725-21munin-run19:55:000
2513899349,5cyclictest81rcu_preempt00:25:010
2513899347,4cyclictest81rcu_preempt00:35:120
2513899346,5cyclictest81rcu_preempt22:59:030
2513899344,5cyclictest81rcu_preempt23:21:430
2513899341,7cyclictest26179-21ssh22:43:020
25138993410,4cyclictest81rcu_preempt00:17:260
194982341,3sleep00-21swapper/023:43:160
319172331,28sleep032010-21memory22:15:220
2513899334,4cyclictest81rcu_preempt22:33:230
2513899333,4cyclictest81rcu_preempt22:53:410
2513899331,4cyclictest81rcu_preempt22:21:240
25138993312,6cyclictest27540-21ssh22:10:270
2513899331,20cyclictest23375-21sh21:33:000
2513899331,19cyclictest20662-21sh23:10:290
2513899331,13cyclictest3165-21users23:25:320
247332331,28sleep024843-21ls20:45:300
2513999327,21cyclictest0-21swapper/100:13:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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