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2026-05-04 - 04:05

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 50 highest latencies:
System rack2slot7s.osadl.org (updated Mon May 04, 2026 00:43:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3130329997663,9cyclictest0-21swapper/000:20:380
3130329997663,9cyclictest0-21swapper/000:20:380
3130331997163,5cyclictest3239471-21grep22:40:012
3130331996355,5cyclictest3243543-21cut22:45:012
3130330995143,5cyclictest516-21in:imuxsock21:30:011
3130329994924,19cyclictest12350irq/32-eth022:10:460
313033099482,34cyclictest3228552-21ssh22:25:461
3130331994643,2cyclictest0-21swapper/223:00:492
3130331994643,2cyclictest0-21swapper/223:00:492
3130329994636,6cyclictest3261215-21ntpq23:05:520
3130331994536,6cyclictest3301062-21aten_r2power_po23:55:382
3130329994534,8cyclictest0-21swapper/021:20:510
3130331994433,7cyclictest3276069-21munin-run23:25:012
3130330994436,5cyclictest3304421-21systemd23:59:591
3130330994436,5cyclictest3281982-21tail23:30:581
3130330994436,5cyclictest3276071-21cut23:25:011
3130331994335,5cyclictest3176356-21tail21:20:582
313033199433,33cyclictest3224425-21ssh22:20:442
313033099435,31cyclictest3232563-21ssh22:30:461
3130330994335,5cyclictest3219744-21aten_r2power_cu22:15:351
3130330994335,5cyclictest3219744-21aten_r2power_cu22:15:351
313032999433,9cyclictest171rcu_preempt23:10:500
3130329994336,4cyclictest3130340-21systemd-run19:10:020
3130331994233,6cyclictest3294039-21timerandwakeup23:45:582
3130330994234,5cyclictest3174470-21idleruntime-cro21:20:011
3130331994136,2cyclictest0-21swapper/220:20:002
3130331994133,5cyclictest3286102-21unixbench_singl23:36:002
3130331994133,5cyclictest3247630-21ssh22:50:012
3130331994132,6cyclictest3304446-21cups-browsed00:10:482
313032999412,33cyclictest3313939-21sh00:10:510
3130331994031,6cyclictest3195611-21aten_r2power_vo21:45:372
3130331994031,5cyclictest420-21avahi-daemon00:29:452
3130330994032,5cyclictest421-21dbus-daemon00:20:021
3130330994032,5cyclictest0-21swapper/121:00:011
3130331993931,5cyclictest3203019-21cron21:55:002
3130331993930,4cyclictest0-21swapper/222:30:482
3130331993929,6cyclictest3333492-21aten_r2power_cu00:35:372
3130330993933,3cyclictest0-21swapper/122:45:011
3130329993932,4cyclictest3257695-21unixbench_singl23:00:590
3130329993932,4cyclictest3257695-21unixbench_singl23:00:590
313033199383,25cyclictest3192111-21ssh21:40:472
313033199383,25cyclictest3192111-21ssh21:40:472
3130331993831,4cyclictest3268052-21latency_hist23:15:022
3130331993831,3cyclictest3222497-21kworker/u8:13-xprtiod22:20:002
3130331993831,3cyclictest3222497-21kworker/u8:13-xprtiod22:20:002
3130331993830,5cyclictest3269756-21sh23:15:592
313033099385,26cyclictest3321377-21aten_r2power_po00:20:371
313033099385,26cyclictest3321377-21aten_r2power_po00:20:371
3130330993830,5cyclictest3151343-21systemd-run20:20:011
3130330993830,5cyclictest0-21swapper/100:40:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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