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2026-04-01 - 03:23

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #3

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 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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot3s.osadl.org (updated Wed Apr 01, 2026 00:45:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3753153998618,58cyclictest16850irq/134-800000021:30:490
3753153998514,33cyclictest16850irq/134-800000000:30:180
3753153998514,33cyclictest16850irq/134-800000000:30:170
3753153998327,12cyclictest3766972-21ssh21:27:220
3753153998116,19cyclictest16850irq/134-800000023:55:280
3753153997712,33cyclictest16850irq/134-800000023:20:060
3753153997617,54cyclictest16850irq/134-800000021:54:150
3753153997615,35cyclictest16850irq/134-800000023:37:270
3753160997524,14cyclictest3768661-21ssh21:31:082
3753153997519,51cyclictest16850irq/134-800000021:22:430
3753153997516,54cyclictest16850irq/134-800000023:02:030
3753160997417,17cyclictest3779423-21ssh21:56:092
3753153997417,34cyclictest16850irq/134-800000023:10:570
3753153997415,34cyclictest16850irq/134-800000000:04:350
3753153997413,31cyclictest16850irq/134-800000000:27:090
3753160997323,16cyclictest3822307-21ssh23:35:202
3753153997324,33cyclictest12-21ksoftirqd/022:29:090
3753153997324,33cyclictest12-21ksoftirqd/022:29:080
3753153997316,33cyclictest16850irq/134-800000022:52:240
3753153997215,33cyclictest16850irq/134-800000023:40:070
3753153997215,33cyclictest16850irq/134-800000021:37:050
3753153997212,30cyclictest16850irq/134-800000023:28:280
3753153997116,32cyclictest16850irq/134-800000023:54:140
3753153997116,32cyclictest16850irq/134-800000022:38:510
3753153997115,33cyclictest16850irq/134-800000022:45:480
3753153997115,33cyclictest16850irq/134-800000022:45:470
3753153997113,6cyclictest16850irq/134-800000022:05:440
3753153997111,5cyclictest16850irq/134-800000000:11:370
3753163997031,35cyclictest37-21ksoftirqd/320:25:003
3753163997031,35cyclictest37-21ksoftirqd/320:25:003
375316399702,14cyclictest3778500-21ssh21:54:193
3753153997018,33cyclictest16850irq/134-800000022:14:440
3753153997016,36cyclictest16850irq/134-800000000:23:100
3753153997014,33cyclictest16850irq/134-800000021:56:220
3753153997013,34cyclictest16850irq/134-800000022:19:530
3753163996929,36cyclictest3846262-21sh00:31:023
3753163996929,36cyclictest3846262-21sh00:31:023
3753163996927,37cyclictest275-21dbus-daemon23:15:003
3753160996921,15cyclictest3467602-21systemd-journal00:16:132
3753163996829,35cyclictest3783993-21sh22:06:523
3753160996817,16cyclictest3753605-21munin-run19:20:002
3753153996819,43cyclictest16850irq/134-800000022:57:510
3753153996819,43cyclictest16850irq/134-800000022:57:510
3753160996723,14cyclictest3785385-21cat22:10:022
375315399677,31cyclictest16850irq/134-800000023:45:070
375315399677,31cyclictest16850irq/134-800000023:45:060
3753153996715,32cyclictest16850irq/134-800000023:30:480
375316399661,17cyclictest3816031-21ssh23:20:513
3753160996620,14cyclictest1-21systemd20:20:012
375316399652,16cyclictest3821978-21munin-run23:35:013
3753160996522,12cyclictest3849307-21ssh00:38:112
375315399658,31cyclictest16850irq/134-800000021:49:450
3753160996419,14cyclictest3846270-21ssh00:31:032
3753160996419,14cyclictest3846270-21ssh00:31:022
3753153996415,33cyclictest16850irq/134-800000022:33:480
375316399631,15cyclictest3756184-21cron20:10:003
3753160996327,5cyclictest3757254-21munin-run20:30:012
3753160996314,14cyclictest3837509-21ssh00:10:402
375316399622,8cyclictest3798132-21cron22:40:003
375316399622,15cyclictest3765253-21rm21:23:293
375316399622,13cyclictest3756420-21sshd20:11:283
375316399621,16cyclictest3783121-21munin-run22:05:013
375316399621,16cyclictest3780983-21munin-run22:00:013
3753160996243,15cyclictest3825378-21ssh23:42:422
3753160996218,14cyclictest3759320-21diskmemload21:51:472
3753160996218,12cyclictest0-21swapper/222:00:312
375316399618,4cyclictest0-21swapper/321:36:083
375316399612,18cyclictest3757480-21cron20:35:013
375316399612,15cyclictest3822222-21ssh23:35:073
375316399612,13cyclictest48-21kcompactd022:55:053
375316399612,13cyclictest48-21kcompactd022:55:053
375316399612,13cyclictest364-21snmpd19:55:383
375316399611,13cyclictest3759077-21munin-run21:05:013
3753160996124,6cyclictest3835431-21ssh00:06:002
3753160996124,6cyclictest3835431-21ssh00:05:592
3753163996027,29cyclictest3758161-21latency_hist20:45:023
375316399602,14cyclictest364-21snmpd23:57:303
375316399601,7cyclictest3827569-21ssh23:47:533
375316399601,7cyclictest3827569-21ssh23:47:533
3753160996019,13cyclictest3764416-21ssh21:21:142
3753160996019,11cyclictest0-21swapper/223:21:542
3753160996016,13cyclictest3771351-21ssh21:37:312
3753160996011,15cyclictest3831542-21ssh23:57:072
3753163995933,23cyclictest3754378-21munin-plugin-st19:35:003
3753163995920,34cyclictest3791451-21sh22:24:173
3753160995939,16cyclictest3792904-21ssh22:27:292
3753160995939,16cyclictest3792904-21ssh22:27:292
3753160995929,5cyclictest3795775-21ssh22:34:252
3753160995916,12cyclictest0-21swapper/221:26:182
375316399582,11cyclictest48-21kcompactd022:15:343
3753163995819,33cyclictest3794078-21cat22:30:023
3753163995819,33cyclictest3794078-21cat22:30:023
3753163995813,7cyclictest3769750-21ssh21:33:543
3753160995845,10cyclictest3791039-21ssh22:23:192
3753160995845,10cyclictest3774301-21ssh21:44:352
3753160995823,32cyclictest3828381-21modprobe23:50:002
3753160995823,32cyclictest3828381-21modprobe23:50:002
3753160995819,7cyclictest3821641-21ssh23:34:162
3753160995817,13cyclictest364-21snmpd00:01:512
3753160995813,14cyclictest3844336-21ssh00:26:392
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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