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2025-12-12 - 09:35

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 Fri Dec 12, 2025 00:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
67339911161090,22cyclictest11681-21fschecks_time19:35:161
67339910871073,9cyclictest0-21swapper/119:25:081
64642678631,32sleep00-21swapper/019:22:500
63912459371,72sleep10-21swapper/119:22:021
6732992701,5cyclictest0-21swapper/019:25:090
1944221440,7sleep0673299cyclictest21:47:520
11292900,5sleep041ktimersoftd/021:29:320
11292900,5sleep041ktimersoftd/021:29:310
74522880,9sleep0673299cyclictest00:22:490
16012820,5sleep11599-21ssh00:50:281
20702800,7sleep0673299cyclictest21:30:150
6732997265,4cyclictest30944-21snmpd19:35:150
180162510,3sleep00-21swapper/000:00:210
6732994619,6cyclictest3-21ksoftirqd/000:11:450
276172460,4sleep1211ktimersoftd/100:10:211
129882430,7sleep1673399cyclictest23:55:181
6732994124,6cyclictest3-21ksoftirqd/022:45:350
6732994124,6cyclictest3-21ksoftirqd/022:03:230
6732994124,6cyclictest3-21ksoftirqd/000:29:190
6732994024,6cyclictest3-21ksoftirqd/020:18:210
6732994024,5cyclictest3-21ksoftirqd/022:26:220
6732994022,6cyclictest3-21ksoftirqd/019:57:200
673299394,18cyclictest12133-21ntp_states23:20:300
6732993923,6cyclictest3-21ksoftirqd/023:08:080
6732993922,6cyclictest3-21ksoftirqd/022:58:080
673299391,16cyclictest0-21swapper/000:45:440
4752391,34sleep1489-21ssh21:28:361
4752391,34sleep1489-21ssh21:28:361
6732993821,6cyclictest3-21ksoftirqd/022:51:100
6732993821,6cyclictest3-21ksoftirqd/022:10:590
6732993821,6cyclictest3-21ksoftirqd/000:17:460
6732993813,4cyclictest0-21swapper/021:10:340
6732993722,5cyclictest3-21ksoftirqd/023:29:120
6732993722,5cyclictest3-21ksoftirqd/022:35:490
6732993721,6cyclictest3-21ksoftirqd/023:18:220
6732993721,6cyclictest3-21ksoftirqd/023:18:210
6732993721,6cyclictest3-21ksoftirqd/022:34:120
6732993721,5cyclictest3-21ksoftirqd/023:02:480
6732993715,4cyclictest111rcuc/022:40:140
6732993715,4cyclictest111rcuc/022:40:140
42732371,32sleep14284-21ssh21:31:561
133072371,3sleep10-21swapper/123:21:361
6732993621,5cyclictest3-21ksoftirqd/021:09:460
6732993620,6cyclictest3-21ksoftirqd/023:38:100
6732993620,5cyclictest3-21ksoftirqd/000:33:450
6732993619,6cyclictest3-21ksoftirqd/000:53:410
6732993619,5cyclictest3-21ksoftirqd/020:38:400
6732993619,4cyclictest24155-21ssh00:06:110
6733993511,5cyclictest49922grep22:40:141
6733993511,5cyclictest49922grep22:40:141
673299352,19cyclictest17559-21awk22:20:000
6732993520,5cyclictest3-21ksoftirqd/020:22:560
6732993519,6cyclictest3-21ksoftirqd/020:45:430
6732993519,6cyclictest3-21ksoftirqd/020:14:250
6732993519,5cyclictest3-21ksoftirqd/023:12:590
6732993518,6cyclictest3-21ksoftirqd/021:25:000
6732993518,6cyclictest3-21ksoftirqd/019:31:130
6732993513,5cyclictest12229-21users21:00:330
673299351,22cyclictest19829-21wget21:15:140
50652351,4sleep15079-21ssh23:13:411
7262341,29sleep1740-21ssh22:01:481
673399341,6cyclictest81rcu_preempt23:00:521
6733993416,5cyclictest22-21ksoftirqd/123:53:161
673399341,14cyclictest0-21swapper/121:19:211
6732993419,5cyclictest3-21ksoftirqd/019:49:440
6732993419,5cyclictest3-21ksoftirqd/019:43:430
6732993418,6cyclictest3-21ksoftirqd/021:40:090
6732993418,6cyclictest3-21ksoftirqd/020:27:490
6732993418,5cyclictest3-21ksoftirqd/020:57:480
6732993418,5cyclictest3-21ksoftirqd/020:01:440
673299341,11cyclictest19337-21fschecks_count00:35:200
215642341,6sleep10-21swapper/123:30:241
673399337,5cyclictest40950irq/93-i91522:23:101
673399336,5cyclictest180172idleruntime00:00:211
673399333,5cyclictest81rcu_preempt21:39:181
6733993316,13cyclictest22-21ksoftirqd/122:18:191
673399331,5cyclictest81rcu_preempt20:33:291
6733993310,19cyclictest0-21swapper/100:42:291
6732993318,5cyclictest3-21ksoftirqd/022:21:320
6732993317,6cyclictest3-21ksoftirqd/020:34:080
6732993317,5cyclictest3-21ksoftirqd/023:47:180
64712330,5sleep1201rcuc/123:15:121
64712330,5sleep1201rcuc/123:15:121
326192331,28sleep132632-21diskstats22:35:151
673399322,5cyclictest0-21swapper/122:49:191
673399321,4cyclictest81rcu_preempt23:25:591
673299329,8cyclictest3-21ksoftirqd/021:39:180
6732993216,5cyclictest3-21ksoftirqd/021:54:140
299012320,29sleep129911-21ssh22:31:551
111152320,4sleep0111rcuc/023:53:190
673399319,5cyclictest40950irq/93-i91521:45:321
673399318,19cyclictest0-21swapper/123:39:171
673399315,12cyclictest0-21swapper/121:56:201
673399314,23cyclictest0-21swapper/122:09:001
6733993115,10cyclictest22-21ksoftirqd/121:41:141
673399311,3cyclictest0-21swapper/120:15:121
6732993116,4cyclictest3-21ksoftirqd/019:52:140
6732993110,11cyclictest30944-21snmpd20:50:300
299402311,5sleep00-21swapper/021:59:070
673399304,11cyclictest0-21swapper/121:12:541
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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