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2026-04-01 - 15:43

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 Apr 01, 2026 12:59:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
262129912171208,6cyclictest0-21swapper/007:25:440
262129912171208,6cyclictest0-21swapper/007:25:430
257932563517,31sleep00-21swapper/007:21:090
257672464418,31sleep10-21swapper/107:20:561
2871621060,24sleep10-21swapper/108:55:021
137612890,9sleep02621299cyclictest12:08:590
3922830,9sleep12621399cyclictest09:05:141
287722700,6sleep00-21swapper/010:44:210
187752700,4sleep0111rcuc/012:47:320
202882550,7sleep12621399cyclictest12:50:001
26213995046,2cyclictest0-21swapper/107:25:441
26213995046,2cyclictest0-21swapper/107:25:441
66552450,8sleep02621299cyclictest12:35:120
26212994427,5cyclictest3-21ksoftirqd/011:20:260
281022430,3sleep1201rcuc/109:35:461
26212994110,15cyclictest2206-21dbus-daemon12:26:470
2621399406,5cyclictest0-21swapper/112:08:151
126122400,8sleep02621299cyclictest11:00:230
2621399392,32cyclictest31109-21df_inode07:35:161
26212993914,15cyclictest3-21ksoftirqd/011:55:510
61232381,3sleep16131-21ssh09:14:021
26212993821,6cyclictest3-21ksoftirqd/010:15:270
2621399377,4cyclictest1828-21diskmemload10:13:551
2621299377,10cyclictest18373-21aten_r4power_po10:00:110
26212993717,5cyclictest3-21ksoftirqd/010:11:090
26212993711,14cyclictest22120-21/usr/sbin/munin09:30:160
236342371,4sleep123645-21ssh10:38:581
2621399369,23cyclictest0-21swapper/111:32:151
2621399366,4cyclictest1828-21diskmemload11:26:171
26213993627,5cyclictest2645-21snmpd08:23:461
26213993627,5cyclictest2645-21snmpd08:23:461
2621399362,30cyclictest0-21swapper/109:17:351
2621399361,6cyclictest2035-21cut12:30:151
2621299363,29cyclictest0-21swapper/012:15:150
2621299363,29cyclictest0-21swapper/009:36:360
26212993616,5cyclictest3-21ksoftirqd/010:55:470
26212993615,5cyclictest3-21ksoftirqd/009:26:200
289542352,4sleep029098-21cut07:30:130
2621399357,4cyclictest81rcu_preempt09:55:131
2621399355,4cyclictest1828-21diskmemload11:17:001
26213993526,5cyclictest24171-21ssh12:54:161
2621299352,19cyclictest0-21swapper/011:40:010
2621299352,10cyclictest81rcu_preempt11:49:310
26212993519,5cyclictest3-21ksoftirqd/010:37:470
26212993517,8cyclictest3-21ksoftirqd/009:46:570
26212993515,5cyclictest3-21ksoftirqd/010:32:300
26212993515,5cyclictest3-21ksoftirqd/010:25:020
224532351,30sleep122463-21ssh10:04:271
2621399345,5cyclictest81rcu_preempt12:36:291
2621399345,4cyclictest81rcu_preempt07:52:351
2621399343,5cyclictest0-21swapper/107:32:151
26213993426,5cyclictest0-21swapper/110:28:151
26213993416,15cyclictest22-21ksoftirqd/110:18:491
2621399341,5cyclictest25467-21kworker/1:509:40:151
2621399341,29cyclictest10852-21ssh09:51:361
2621299346,4cyclictest81rcu_preempt10:05:290
2621299344,4cyclictest81rcu_preempt11:05:240
2621299342,29cyclictest0-21swapper/010:23:550
26212993418,5cyclictest3-21ksoftirqd/011:41:500
26212993418,5cyclictest3-21ksoftirqd/010:47:400
2621299341,7cyclictest4745-21ssh12:32:420
26212993415,5cyclictest3-21ksoftirqd/009:22:200
26212993414,5cyclictest3-21ksoftirqd/011:19:150
2621299341,30cyclictest0-21swapper/012:40:360
2621299341,30cyclictest0-21swapper/012:40:350
2621299341,29cyclictest10352-21ssh11:31:150
2621299341,21cyclictest11868-21aten_r4power_cu08:10:100
2621299341,20cyclictest30045-21users08:55:310
22682341,4sleep130496-21packagekitd11:23:431
136802340,4sleep113131-21kworker/1:311:01:191
2621399335,4cyclictest81rcu_preempt12:02:311
2621399334,4cyclictest81rcu_preempt12:42:231
2621399334,4cyclictest81rcu_preempt12:42:231
2621399334,4cyclictest81rcu_preempt12:18:161
2621399333,4cyclictest81rcu_preempt12:11:151
2621399333,28cyclictest0-21swapper/108:38:561
2621399331,4cyclictest1828-21diskmemload11:39:351
2621399331,30cyclictest0-21swapper/110:09:351
2621299333,4cyclictest81rcu_preempt11:50:360
26212993317,5cyclictest3-21ksoftirqd/012:11:440
26212993316,5cyclictest3-21ksoftirqd/010:54:160
2621299331,30cyclictest0-21swapper/012:00:350
2621299331,30cyclictest0-21swapper/009:43:160
2621299331,30cyclictest0-21swapper/008:20:360
2621299331,30cyclictest0-21swapper/008:20:360
2621299331,29cyclictest2403-21irqbalance09:55:160
2621299331,20cyclictest6229-21ssh11:27:170
73852321,3sleep07401-21diskstats09:15:140
71862321,4sleep17348-21perl10:55:171
49842320,4sleep0111rcuc/007:50:260
2621399326,4cyclictest81rcu_preempt10:46:311
2621399326,22cyclictest0-21swapper/111:53:331
2621399324,4cyclictest81rcu_preempt12:23:021
2621399324,11cyclictest3302-21runrttasks08:31:081
2621399323,4cyclictest81rcu_preempt11:12:581
26213993225,4cyclictest22-21ksoftirqd/111:47:061
2621299328,12cyclictest24373-21grep08:40:270
2621299323,4cyclictest81rcu_preempt12:24:540
26212993216,5cyclictest21039-21/usr/sbin/munin12:50:150
2621299321,29cyclictest0-21swapper/009:04:150
2621299321,29cyclictest0-21swapper/007:45:350
2621399317,13cyclictest40550irq/92-i91510:50:551
2621399313,4cyclictest81rcu_preempt11:05:451
2621399313,4cyclictest81rcu_preempt09:47:441
2621399312,5cyclictest81rcu_preempt10:40:151
26213993123,6cyclictest0-21swapper/108:13:161
2621399312,16cyclictest26095-21/usr/sbin/munin08:45:291
26213993116,4cyclictest22-21ksoftirqd/110:23:191
26213993114,13cyclictest15070-21aten_r4power_vo10:30:111
2621399311,27cyclictest0-21swapper/107:56:161
2621299313,4cyclictest81rcu_preempt11:14:400
26212993116,5cyclictest3-21ksoftirqd/009:10:020
26212993114,6cyclictest3-21ksoftirqd/007:37:160
26212993113,7cyclictest19663-21df08:30:140
26212993113,5cyclictest9329-21iostat_ios09:50:200
2621299311,27cyclictest0-21swapper/007:56:350
26212993112,6cyclictest9368-21users08:00:290
26212993112,6cyclictest18303-21ntpq08:25:240
2621299311,19cyclictest1570-21runrttasks09:07:300
2621399307,6cyclictest81rcu_preempt09:32:361
2621399302,4cyclictest81rcu_preempt07:49:441
2621399301,5cyclictest0-21swapper/108:28:561
26213993015,12cyclictest22-21ksoftirqd/109:20:141
2621399301,4cyclictest81rcu_preempt12:28:341
2621399301,20cyclictest0-21swapper/108:07:071
2621299308,4cyclictest22133-21ps08:35:260
2621299301,4cyclictest81rcu_preempt08:08:550
26212993013,6cyclictest3-21ksoftirqd/007:42:160
26212993011,6cyclictest27495-21iostat08:50:180
26213992921,5cyclictest0-21swapper/111:55:361
2621299293,12cyclictest0-21swapper/008:46:120
323012281,5sleep10-21swapper/109:04:061
2621399288,16cyclictest0-21swapper/109:25:231
196562281,5sleep10-21swapper/111:40:451
2621399274,13cyclictest0-21swapper/108:04:151
26213992717,6cyclictest30007-21unixbench_singl08:55:291
2621299272,13cyclictest14412-21/usr/sbin/munin08:15:220
2621399261,9cyclictest683-21fschecks_time07:40:151
2621399261,9cyclictest3302-21runrttasks08:15:331
2621399261,9cyclictest24380-21grep08:40:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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