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2025-12-06 - 08:25

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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 rack7slot7s.osadl.org (updated Sat Dec 06, 2025 00:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
508929977,16sleep10-21swapper/119:05:181
618229884,9sleep30-21swapper/319:07:213
604728167,9sleep00-21swapper/019:05:370
425927867,6sleep20-21swapper/219:05:112
647499270,1cyclictest14705-21cat00:30:182
194322260,0sleep00-21swapper/022:31:060
647499231,3cyclictest0-21swapper/221:25:162
646599230,1cyclictest0-21swapper/021:13:460
647499220,22cyclictest0-21swapper/222:19:592
647499220,1cyclictest0-21swapper/221:50:142
647199220,1cyclictest0-21swapper/100:10:181
6478992119,1cyclictest3327-21/usr/sbin/munin21:35:223
6474992119,1cyclictest32-21ksoftirqd/200:37:362
6465992119,2cyclictest8622-21kworker/u8:222:24:230
6478992017,2cyclictest25979-21/usr/sbin/munin23:25:243
647499204,5cyclictest32164-21/usr/sbin/munin22:40:272
6474992017,3cyclictest37850irq/131-snd_hda21:35:562
6471992017,2cyclictest5081-21/usr/sbin/munin22:45:131
6465992019,1cyclictest13-21ksoftirqd/000:36:340
6465992016,3cyclictest13-21ksoftirqd/021:45:560
646599200,1cyclictest0-21swapper/021:28:030
177132200,0sleep10-21swapper/123:42:271
647199198,9cyclictest10672-21ssh21:40:111
6465991917,1cyclictest13-21ksoftirqd/021:38:460
646599190,18cyclictest0-21swapper/022:46:310
647499180,18cyclictest31532-21diskmemload23:33:062
647499180,13cyclictest0-21swapper/222:45:122
646599182,1cyclictest141rcu_preempt22:26:030
6465991816,2cyclictest13-21ksoftirqd/023:05:010
646599180,1cyclictest141rcu_preempt00:06:460
647899170,14cyclictest6711-21apt-get19:10:143
646599175,7cyclictest26053-21ssh23:25:170
646599171,0cyclictest141rcu_preempt00:20:380
646599170,14cyclictest0-21swapper/000:14:340
647499169,3cyclictest291irq_work/200:18:022
647499162,7cyclictest0-21swapper/221:45:172
6474991615,1cyclictest0-21swapper/223:00:222
6474991615,1cyclictest0-21swapper/221:10:132
647499160,3cyclictest0-21swapper/219:25:122
647499160,1cyclictest0-21swapper/223:14:392
647499160,16cyclictest0-21swapper/200:11:102
647499160,15cyclictest0-21swapper/223:54:222
647199161,14cyclictest19428-21ssh23:20:161
647199160,15cyclictest0-21swapper/100:21:271
646599162,13cyclictest12788-21apt-get23:15:160
6465991614,1cyclictest13-21ksoftirqd/021:15:130
6465991613,2cyclictest13-21ksoftirqd/023:55:190
646599160,1cyclictest0-21swapper/023:46:090
647899156,4cyclictest224-21systemd-journal00:09:583
6478991510,3cyclictest22768-21ls19:40:253
647499159,5cyclictest27215-21tail23:25:232
647499152,1cyclictest224-21systemd-journal23:25:002
6474991512,3cyclictest0-21swapper/222:23:122
6474991511,3cyclictest13795-21apt-config19:25:002
647499150,3cyclictest31532-21diskmemload21:42:412
647499150,2cyclictest0-21swapper/222:37:332
6471991513,1cyclictest31929-21/usr/sbin/munin21:10:201
646599153,7cyclictest19286-21df22:55:170
646599152,10cyclictest15368-21/usr/sbin/munin00:30:230
646599150,3cyclictest0-21swapper/019:25:120
646599150,1cyclictest141rcu_preempt22:06:120
646599150,1cyclictest0-21swapper/021:54:490
647899143,2cyclictest224-21systemd-journal00:11:113
6478991410,3cyclictest25278-21tune2fs20:55:173
6478991410,3cyclictest19143-21grep20:40:273
6478991410,2cyclictest7014-21grep22:45:263
6478991410,2cyclictest6975-21sort22:00:003
647899140,1cyclictest0-21swapper/323:19:513
6474991413,1cyclictest26834-21smartctl19:50:182
6474991413,1cyclictest26834-21smartctl19:50:172
6474991411,3cyclictest18944-21kworker/u8:121:24:472
647499140,5cyclictest32-21ksoftirqd/222:25:192
647199143,4cyclictest28498-21ssh21:30:131
6471991410,3cyclictest10885-21sed00:25:311
646599149,1cyclictest13-21ksoftirqd/019:15:010
647899139,3cyclictest32017-21grep23:05:153
647899139,3cyclictest32017-21grep23:05:143
647899139,3cyclictest24450-21cron00:40:003
647899139,3cyclictest15081-21sh00:05:003
647899139,3cyclictest1502-21head20:05:153
647899137,2cyclictest400-21grep23:30:163
6478991310,2cyclictest7013-21sed23:10:213
6478991310,2cyclictest321-21ssh21:10:173
6478991310,2cyclictest26095-21head21:50:163
6478991310,2cyclictest25049-21wc23:00:003
6478991310,2cyclictest19075-21ssh21:45:203
6478991310,2cyclictest13377-21wc22:50:223
647899130,12cyclictest29113-21tr00:15:153
647899130,12cyclictest11959-21grep20:25:303
647499139,3cyclictest7581-21cat21:15:202
647499135,8cyclictest0-21swapper/223:06:252
647499135,8cyclictest0-21swapper/223:06:252
6474991312,1cyclictest3848-21kworker/u8:020:02:242
647499131,1cyclictest31532-21diskmemload21:59:142
6474991311,2cyclictest311rcuc/200:10:002
6474991311,1cyclictest32-21ksoftirqd/220:20:002
647499130,8cyclictest0-21swapper/223:40:142
647499130,3cyclictest0-21swapper/222:00:252
647499130,0cyclictest0-21swapper/222:12:372
647199139,3cyclictest9179-21grep22:00:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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