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2026-04-17 - 05:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #8

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 rackbslot8s (updated Fri Apr 17, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1518112211988,9sleep40-21swapper/419:07:294
1518112211988,9sleep40-21swapper/419:07:284
15182632118103,10sleep70-21swapper/719:09:407
15182632118103,10sleep70-21swapper/719:09:397
15182772117103,9sleep30-21swapper/319:09:513
15182772117103,9sleep30-21swapper/319:09:513
15180982115101,9sleep10-21swapper/119:07:161
15180982115101,9sleep10-21swapper/119:07:161
15180462114100,9sleep50-21swapper/519:06:335
15180462114100,9sleep50-21swapper/519:06:325
1518043211399,9sleep20-21swapper/219:06:292
1518043211399,9sleep20-21swapper/219:06:292
1518162211282,10sleep00-21swapper/019:08:120
1518162211282,10sleep00-21swapper/019:08:120
1518179210894,9sleep60-21swapper/619:08:276
1518179210894,9sleep60-21swapper/619:08:276
1518676991052,101cyclictest31-21ksoftirqd/223:38:582
151867699105103,0cyclictest31-21ksoftirqd/222:00:482
1518676991041,100cyclictest31-21ksoftirqd/222:17:002
1518676991040,101cyclictest141rcu_preempt00:13:382
1518676991040,100cyclictest141rcu_preempt22:27:392
15186909910393,10cyclictest0-21swapper/521:35:155
1518684991030,100cyclictest0-21swapper/422:16:494
1518676991033,0cyclictest31-21ksoftirqd/223:57:262
1518676991031,102cyclictest31-21ksoftirqd/223:10:442
151867699103100,0cyclictest141rcu_preempt23:27:282
1518676991030,1cyclictest141rcu_preempt22:57:562
1518676991030,101cyclictest141rcu_preempt00:20:062
1518676991030,0cyclictest141rcu_preempt23:02:402
1518676991030,0cyclictest141rcu_preempt00:01:442
15186909910299,3cyclictest553-21snmpd21:56:215
15186909910298,4cyclictest1551493-21cat20:10:115
1518684991020,99cyclictest0-21swapper/400:05:144
1518684991020,102cyclictest0-21swapper/421:35:154
1518676991022,100cyclictest31-21ksoftirqd/221:22:102
1518676991021,100cyclictest1730922-21kworker/2:023:50:262
1518676991021,0cyclictest31-21ksoftirqd/222:10:042
151867699102100,0cyclictest31-21ksoftirqd/221:44:262
1518676991020,102cyclictest31-21ksoftirqd/221:50:582
1518676991020,101cyclictest1730922-21kworker/2:023:42:372
1518676991020,101cyclictest1730922-21kworker/2:023:33:442
1518676991020,0cyclictest141rcu_preempt00:26:522
15186679910299,3cyclictest553-21snmpd21:30:080
1518667991020,101cyclictest1580542-21diskmemload22:55:440
1518700991010,99cyclictest0-21swapper/721:25:057
1518700991010,101cyclictest0-21swapper/722:40:177
1518700991010,101cyclictest0-21swapper/719:41:147
1518700991010,100cyclictest0-21swapper/723:03:587
1518700991010,100cyclictest0-21swapper/720:50:477
1518700991010,100cyclictest0-21swapper/720:25:247
1518700991010,0cyclictest0-21swapper/721:20:207
1518700991010,0cyclictest0-21swapper/720:30:527
151869499101101,0cyclictest1642018-21kworker/6:022:40:286
1518694991010,100cyclictest0-21swapper/620:54:046
15186909910199,2cyclictest553-21snmpd00:09:175
1518690991010,100cyclictest0-21swapper/519:51:375
1518690991010,100cyclictest0-21swapper/500:16:125
1518690991010,0cyclictest0-21swapper/519:34:055
15186849910199,2cyclictest553-21snmpd22:38:114
15186849910198,3cyclictest553-21snmpd22:28:114
15186849910196,5cyclictest553-21snmpd22:40:144
151868499101100,1cyclictest553-21snmpd00:00:594
1518684991010,101cyclictest0-21swapper/400:10:124
1518684991010,100cyclictest0-21swapper/400:18:394
15186819910199,2cyclictest553-21snmpd22:39:263
15186819910199,1cyclictest553-21snmpd19:39:383
151868199101100,1cyclictest553-21snmpd23:17:343
151868199101100,1cyclictest553-21snmpd22:59:423
15186769910199,2cyclictest553-21snmpd21:25:212
1518676991012,1cyclictest31-21ksoftirqd/200:35:342
1518676991011,1cyclictest31-21ksoftirqd/221:17:182
1518676991011,1cyclictest1580699-21kworker/2:222:43:562
1518676991011,1cyclictest1580699-21kworker/2:222:38:122
1518676991011,100cyclictest1580699-21kworker/2:222:30:122
1518676991011,100cyclictest1580699-21kworker/2:221:35:162
151867699101100,1cyclictest31-21ksoftirqd/220:36:372
151867699101100,1cyclictest1730922-21kworker/2:000:05:432
151867699101100,1cyclictest0-21swapper/222:51:112
1518676991010,101cyclictest1580699-21kworker/2:223:06:282
1518676991010,100cyclictest1580699-21kworker/2:222:20:372
1518676991010,100cyclictest1580699-21kworker/2:221:55:012
1518676991010,100cyclictest1570521-21kworker/2:121:05:142
1518676991010,100cyclictest1040635-21kworker/2:020:00:122
1518676991010,0cyclictest141rcu_preempt21:12:062
15186729910199,2cyclictest553-21snmpd23:29:011
15186729910199,2cyclictest553-21snmpd22:06:311
15186729910199,2cyclictest553-21snmpd21:43:001
1518672991010,100cyclictest0-21swapper/123:20:271
1518672991010,100cyclictest0-21swapper/100:02:241
15186679910199,2cyclictest553-21snmpd20:58:530
15186679910199,2cyclictest553-21snmpd00:35:300
15186679910199,2cyclictest553-21snmpd00:18:450
15186679910197,4cyclictest553-21snmpd22:24:350
15186679910197,4cyclictest553-21snmpd21:59:150
15186679910197,1cyclictest553-21snmpd21:10:410
1518667991010,99cyclictest0-21swapper/021:20:540
1518667991010,100cyclictest0-21swapper/022:50:290
1518667991010,100cyclictest0-21swapper/022:00:480
1518700991000,99cyclictest0-21swapper/719:49:417
1518700991000,99cyclictest0-21swapper/719:16:347
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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