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2026-06-19 - 09:18

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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 rack2slot7s.osadl.org (updated Fri Jun 19, 2026 00:43:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2736577997263,5cyclictest2885269-21grep00:10:242
2736576995143,4cyclictest0-21swapper/100:00:011
2736576994941,5cyclictest2759094-21systemd-run20:25:011
2736577994638,5cyclictest2813700-21ssh22:15:212
2736577994539,3cyclictest0-21swapper/200:20:232
2736577994537,7cyclictest0-21swapper/223:20:282
2736577994537,5cyclictest2850312-21idleruntime-cro23:15:012
2736577994437,3cyclictest0-21swapper/221:20:012
2736575994420,19cyclictest151ktimers/020:05:290
2736577994337,3cyclictest0-21swapper/220:20:012
2736577994335,5cyclictest0-21swapper/219:20:002
2736577994335,5cyclictest0-21swapper/219:20:002
2736575994315,23cyclictest2879198-21ssh00:00:320
2736577994233,6cyclictest421-21dbus-daemon23:40:022
2736576994233,6cyclictest2792291-21needreboot21:40:271
273657599426,30cyclictest421-21dbus-daemon23:50:350
2736577994133,5cyclictest2751598-21latency_hist20:00:022
2736577994124,11cyclictest567-21gdbus00:35:302
2736576994132,6cyclictest2884561-21latency_hist00:10:021
2736576994130,6cyclictest2776751-21ssh21:15:301
273657599411,30cyclictest2888538-21ssh00:15:290
2736577994032,6cyclictest351ktimers/219:30:292
2736577994031,6cyclictest2878571-21aten_r2power_fr00:00:182
2736577994030,6cyclictest2781984-21systemd-run21:25:022
2736576994032,5cyclictest2810009-21systemd-run22:10:021
2736576994030,5cyclictest0-21swapper/100:30:281
273657799393,29cyclictest2826589-21ssh22:35:322
273657799393,29cyclictest2826589-21ssh22:35:322
2736577993932,4cyclictest0-21swapper/223:55:022
2736577993930,6cyclictest420-21avahi-daemon21:36:002
273657799391,32cyclictest2817235-21ssh22:20:282
2736575993931,5cyclictest151ktimers/000:25:300
2736575993914,17cyclictest12650irq/32-eth023:35:320
273657799383,26cyclictest2882362-21ssh00:05:322
2736577993829,5cyclictest2858468-21sh23:26:342
2736577993829,5cyclictest2801098-21aten_r2power_po21:55:182
2736577993826,8cyclictest420-21avahi-daemon21:10:322
2736576993829,5cyclictest2800675-21ssh21:55:021
2736576993829,4cyclictest0-21swapper/100:10:281
273657699381,32cyclictest2848240-21ssh23:10:281
2736575993831,4cyclictest0-21swapper/000:40:010
2736575993825,7cyclictest151ktimers/019:40:350
273657599382,33cyclictest2854433-21ssh23:20:270
2736577993729,5cyclictest2894382-21gltestperf00:25:232
2736577993728,6cyclictest420-21avahi-daemon21:00:022
273657799372,26cyclictest2811029-21ssh22:10:292
273657799372,25cyclictest2792340-21ssh21:40:282
2736576993730,4cyclictest2834831-21systemd22:50:011
2736576993729,5cyclictest1-21systemd19:45:021
2736576993729,4cyclictest0-21swapper/121:55:361
2736575993731,4cyclictest2775724-21ssh21:15:020
2736575993731,4cyclictest2758216-21sshd20:20:220
2736575993730,4cyclictest1003-21mta-sts-daemon22:49:180
273657799363,25cyclictest2795545-21ssh21:45:312
2736577993626,4cyclictest0-21swapper/222:57:452
2736577993617,13cyclictest351ktimers/223:30:262
2736576993630,3cyclictest0-21swapper/123:50:021
2736576993629,4cyclictest2788832-21fschecks_time21:35:211
2736576993629,3cyclictest0-21swapper/122:20:251
2736576993628,5cyclictest2813111-21systemd-run22:15:021
2736575993630,4cyclictest1002-21mta-sts-daemon00:34:490
2736575993627,7cyclictest421-21dbus-daemon23:55:430
2736575993626,4cyclictest0-21swapper/021:50:290
2736577993529,3cyclictest0-21swapper/200:20:012
2736577993528,4cyclictest0-21swapper/221:25:252
2736577993527,5cyclictest2844232-21latency_hist23:05:022
2736577993511,17cyclictest420-21avahi-daemon20:50:352
273657699355,24cyclictest2863763-21ssh23:35:301
2736576993528,4cyclictest2889094-21unixbench_multi00:15:411
2736576993527,5cyclictest2828607-21ssh22:40:001
2736576993527,5cyclictest2828607-21ssh22:40:001
2736576993526,7cyclictest2757559-21sendmail20:20:011
273657699352,28cyclictest2773548-21ssh21:10:271
2736575993530,3cyclictest0-21swapper/020:20:010
2736575993529,4cyclictest1-21systemd23:20:020
2736575993529,2cyclictest0-21swapper/021:55:280
2736575993527,4cyclictest2823026-21fschecks_count22:30:210
2736575993518,10cyclictest12650irq/32-eth022:05:280
273657799346,5cyclictest171rcu_preempt23:05:302
2736577993427,4cyclictest2847238-21kworker/u8:4-xprtiod00:00:012
2736577993425,6cyclictest1-21systemd20:45:022
2736577993424,5cyclictest0-21swapper/222:02:252
2736577993424,4cyclictest0-21swapper/223:15:322
273657799342,20cyclictest2786214-21ssh21:30:342
2736577993419,9cyclictest351ktimers/219:40:292
2736576993427,4cyclictest2841003-21cron23:00:011
2736576993426,3cyclictest0-21swapper/123:05:301
273657699341,29cyclictest2879144-21ssh00:00:271
2736575993428,4cyclictest2744330-21aten_r2power_cu19:35:170
2736575993424,4cyclictest12750irq/33-eth020:00:300
2736575993423,8cyclictest2796029-21unixbench_multi21:45:400
273657799335,19cyclictest2866863-21ssh23:40:382
273657799333,22cyclictest2823487-21ssh22:30:312
2736577993325,5cyclictest2820511-21processes22:25:342
273657799332,4cyclictest171rcu_preempt22:50:302
2736576993328,2cyclictest0-21swapper/121:10:011
2736576993326,4cyclictest0-21swapper/123:50:351
2736576993325,5cyclictest2837896-21cron22:55:001
2736576993325,5cyclictest2831804-21latency_hist22:45:021
2736576993325,5cyclictest2786525-21grep21:30:411
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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