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2026-03-25 - 11:14

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 highest latencies:
System rack9slot4s (updated Wed Mar 25, 2026 00:59:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
168829910961065,17cyclictest0-21swapper/019:26:130
168839910951084,8cyclictest0-21swapper/119:26:351
166702693614,41sleep10-21swapper/119:23:221
168172578531,33sleep00-21swapper/019:24:530
219002910,7sleep11688399cyclictest00:26:451
134302840,3sleep1211ktimersoftd/100:18:301
248352760,4sleep041ktimersoftd/021:42:550
140792760,6sleep014082-21sort20:40:170
16883995916,6cyclictest22-21ksoftirqd/122:30:091
16883995914,6cyclictest22-21ksoftirqd/122:02:491
16883995914,6cyclictest22-21ksoftirqd/122:02:491
16883995713,6cyclictest22-21ksoftirqd/121:58:131
16883995618,6cyclictest22-21ksoftirqd/120:05:231
16883995618,6cyclictest22-21ksoftirqd/100:05:131
16883995618,6cyclictest22-21ksoftirqd/100:00:251
16883995617,8cyclictest22-21ksoftirqd/119:50:281
16883995617,6cyclictest22-21ksoftirqd/122:50:311
16883995617,6cyclictest22-21ksoftirqd/122:45:181
16883995616,6cyclictest22-21ksoftirqd/100:42:421
16883995614,6cyclictest22-21ksoftirqd/122:40:411
16883995614,6cyclictest22-21ksoftirqd/122:40:401
1688399559,9cyclictest22-21ksoftirqd/123:03:251
1688399559,6cyclictest22-21ksoftirqd/123:14:391
16883995517,6cyclictest22-21ksoftirqd/120:40:281
16883995516,6cyclictest22-21ksoftirqd/121:45:121
1688399548,6cyclictest22-21ksoftirqd/121:33:331
1688399548,6cyclictest22-21ksoftirqd/121:22:081
16883995417,6cyclictest22-21ksoftirqd/122:26:001
16883995416,6cyclictest22-21ksoftirqd/123:25:221
16883995416,6cyclictest22-21ksoftirqd/122:10:151
16883995416,6cyclictest22-21ksoftirqd/121:00:261
16883995415,6cyclictest22-21ksoftirqd/100:10:281
1688399539,5cyclictest22-21ksoftirqd/123:52:021
1688399539,5cyclictest22-21ksoftirqd/122:35:591
1688399538,6cyclictest22-21ksoftirqd/123:40:501
1688399537,6cyclictest22-21ksoftirqd/121:42:481
1688399537,5cyclictest22-21ksoftirqd/100:33:581
16883995320,4cyclictest22-21ksoftirqd/123:06:451
16883995317,6cyclictest22-21ksoftirqd/122:05:281
16883995316,6cyclictest22-21ksoftirqd/123:30:111
16883995316,6cyclictest22-21ksoftirqd/120:50:221
16883995315,15cyclictest22-21ksoftirqd/121:10:231
1688399527,6cyclictest22-21ksoftirqd/123:35:551
16883995217,6cyclictest22-21ksoftirqd/119:45:121
16883995216,10cyclictest22-21ksoftirqd/122:55:221
16883995214,6cyclictest22-21ksoftirqd/121:05:181
16883995124,5cyclictest22-21ksoftirqd/122:21:401
16883995116,5cyclictest22-21ksoftirqd/120:45:161
16883995116,5cyclictest22-21ksoftirqd/120:45:161
16883995115,6cyclictest22-21ksoftirqd/123:46:271
16883995114,10cyclictest22-21ksoftirqd/121:53:171
16883995114,10cyclictest22-21ksoftirqd/121:35:291
1688399506,5cyclictest22-21ksoftirqd/100:20:381
16883995019,5cyclictest22-21ksoftirqd/100:38:051
16883995015,6cyclictest22-21ksoftirqd/100:50:121
16883995014,6cyclictest22-21ksoftirqd/123:55:111
16883995014,13cyclictest22-21ksoftirqd/100:45:111
16883995013,6cyclictest22-21ksoftirqd/121:27:031
16883994912,5cyclictest22-21ksoftirqd/123:15:131
16883994815,5cyclictest22-21ksoftirqd/120:15:121
16883994813,6cyclictest22-21ksoftirqd/123:22:401
16883994812,6cyclictest22-21ksoftirqd/120:00:121
16883994812,6cyclictest22-21ksoftirqd/120:00:121
16883994811,5cyclictest22-21ksoftirqd/119:55:101
1688399479,6cyclictest22-21ksoftirqd/120:35:241
1688399479,5cyclictest22-21ksoftirqd/120:55:211
16883994623,12cyclictest22-21ksoftirqd/119:30:191
16883994615,10cyclictest22-21ksoftirqd/121:17:441
16883994610,6cyclictest22-21ksoftirqd/122:19:171
16883994524,10cyclictest22-21ksoftirqd/120:20:171
16883994521,4cyclictest22-21ksoftirqd/120:25:271
16883994422,4cyclictest22-21ksoftirqd/119:35:231
237252430,5sleep123726-21fschecks_time19:40:161
16883994312,6cyclictest22-21ksoftirqd/120:10:151
47582420,7sleep01688299cyclictest21:21:510
1688399429,5cyclictest22-21ksoftirqd/120:30:121
1688299414,33cyclictest0-21swapper/021:45:150
1688299391,9cyclictest0-21swapper/023:12:550
1688299381,34cyclictest0-21swapper/022:36:350
16882993810,14cyclictest0-21swapper/022:15:130
1688299379,15cyclictest3302-21runrttasks19:36:040
87932360,3sleep00-21swapper/022:33:180
1688299366,13cyclictest30497-21gdbus20:08:200
1688299362,30cyclictest0-21swapper/023:37:160
1688299362,22cyclictest0-21swapper/021:25:340
1688299361,22cyclictest4453-21rm00:42:190
16882993611,13cyclictest24073-21/usr/sbin/munin19:40:220
323732351,30sleep032473-21mailstats21:50:270
253542351,4sleep025364-21ntp_states00:30:250
191142351,30sleep02645-21snmpd23:17:030
1688299357,17cyclictest7356-21ssh00:11:410
1688299356,25cyclictest19932-21diskstats00:25:160
1688299355,4cyclictest81rcu_preempt23:24:450
1688299354,4cyclictest81rcu_preempt23:50:410
16882993517,6cyclictest3-21ksoftirqd/000:03:390
16882993512,6cyclictest2871-21memory23:00:220
1688299351,11cyclictest14273-21taskset00:53:590
1688299345,4cyclictest81rcu_preempt21:20:010
1688299345,26cyclictest1684-21cron23:00:000
1688299344,4cyclictest81rcu_preempt21:33:220
1688299343,4cyclictest81rcu_preempt22:20:110
1688299342,18cyclictest17130-21ssh22:08:350
16882993420,4cyclictest3-21ksoftirqd/023:29:020
1688299341,5cyclictest81rcu_preempt21:55:220
1688299341,5cyclictest2403-21irqbalance22:01:560
1688299341,5cyclictest2403-21irqbalance22:01:560
1688299341,5cyclictest2368-21ssh00:06:350
1688299341,5cyclictest10410-21ssh23:41:150
1688299341,30cyclictest0-21swapper/000:46:350
16882993412,7cyclictest17824-21ntpq21:35:250
1688299341,21cyclictest26833-21ssh22:51:250
16882993410,11cyclictest0-21swapper/022:25:140
1688299334,4cyclictest81rcu_preempt23:32:400
1688299333,4cyclictest81rcu_preempt00:35:240
1688299332,28cyclictest0-21swapper/023:46:350
1688299332,28cyclictest0-21swapper/023:08:350
1688299332,15cyclictest10896-21ntpq00:15:270
16882993316,4cyclictest3-21ksoftirqd/022:40:310
16882993316,4cyclictest3-21ksoftirqd/022:40:300
1688299326,4cyclictest23591-21ssh22:48:430
1688299324,3cyclictest0-21swapper/020:50:160
1688299321,5cyclictest81rcu_preempt23:58:440
1688299321,4cyclictest81rcu_preempt00:22:130
1688299321,29cyclictest0-21swapper/020:10:360
1688299321,29cyclictest0-21swapper/019:55:360
1688299321,28cyclictest0-21swapper/021:00:360
1688299321,28cyclictest0-21swapper/020:32:160
1688299318,12cyclictest2206-21dbus-daemon20:01:420
1688299318,12cyclictest2206-21dbus-daemon20:01:410
1688299317,5cyclictest81rcu_preempt21:10:140
1688299316,13cyclictest3302-21runrttasks20:28:020
1688299313,15cyclictest26011-21ntp_states19:45:240
16882993112,5cyclictest21275-21idleruntime-cro19:35:000
1688299311,18cyclictest19086-21irqstats22:10:220
207902301,5sleep00-21swapper/020:58:540
16882993021,5cyclictest27679-21uname19:50:200
169382291,5sleep00-21swapper/020:47:520
169382291,5sleep00-21swapper/020:47:520
1688299292,14cyclictest23978-21/usr/sbin/munin21:05:290
1688299292,13cyclictest6634-21irqstats20:20:210
16882992911,5cyclictest4819-21memory20:15:190
1688299281,15cyclictest11851-21tr20:35:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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