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2026-07-06 - 05:15

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 Mon Jul 06, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1230137996858,6cyclictest1001-21mta-sts-daemon21:25:382
1230135995134,11cyclictest0-21swapper/023:20:390
1230135995134,11cyclictest0-21swapper/023:20:390
1230137994738,6cyclictest1258651-21systemd-run20:45:012
1230137994636,6cyclictest1360881-21munin-plugin-st23:45:012
1230135994634,9cyclictest1330392-21idleruntime-cro22:55:010
1230137994536,6cyclictest0-21swapper/220:20:012
123013699457,8cyclictest171rcu_preempt00:25:371
123013699457,8cyclictest171rcu_preempt00:25:371
1230135994527,9cyclictest12650irq/32-eth000:05:390
1230136994439,2cyclictest0-21swapper/100:15:371
1230136994439,2cyclictest0-21swapper/100:15:371
123013699443,33cyclictest1349739-21rm23:25:361
123013699443,33cyclictest1349739-21rm23:25:361
1230135994438,4cyclictest1357814-21munin-run23:40:010
123013599443,35cyclictest1377267-21diskmemload00:10:390
1230137994317,17cyclictest420-21avahi-daemon22:10:382
1230136994337,3cyclictest0-21swapper/123:10:461
1230136994334,6cyclictest1296984-21latency_hist22:00:021
1230136994333,7cyclictest1261630-21systemd-run20:55:011
1230135994336,4cyclictest1313774-21unixbench_singl22:25:510
1230137994234,5cyclictest1296774-21idleruntime-cro22:00:002
1230137994231,7cyclictest420-21avahi-daemon00:14:242
123013799422,33cyclictest1291744-21ssh21:50:372
123013799422,33cyclictest1291744-21ssh21:50:372
1230136994235,3cyclictest0-21swapper/121:30:351
1230136994233,6cyclictest421-21dbus-daemon23:10:011
1230136994233,6cyclictest1282145-21fschecks_time21:35:291
1230136994229,10cyclictest1313780-21unixbench_singl22:25:511
1230137994132,4cyclictest0-21swapper/223:05:352
1230136994128,5cyclictest1002-21mta-sts-daemon23:51:461
1230136994121,14cyclictest271ktimers/122:11:331
1230135994132,6cyclictest12650irq/32-eth022:05:420
1230136994032,5cyclictest1321933-21fschecks_time22:40:301
1230135994032,6cyclictest1266121-21diskmemload21:20:010
1230135994026,2cyclictest171rcu_preempt20:35:410
1230135994026,2cyclictest171rcu_preempt20:35:410
1230137993932,3cyclictest0-21swapper/200:30:002
1230137993932,3cyclictest0-21swapper/200:30:002
1230137993931,4cyclictest0-21swapper/221:15:022
1230137993929,6cyclictest1003-21mta-sts-daemon21:40:412
1230137993929,6cyclictest1003-21mta-sts-daemon21:40:412
1230137993929,5cyclictest0-21swapper/200:10:012
1230136993931,5cyclictest1325953-21unixbench_singl22:45:481
1230136993930,6cyclictest1233212-21latency_hist19:20:021
1230135993932,4cyclictest1296806-21systemd-run22:00:010
1230135993932,4cyclictest1236147-21systemd-run19:30:010
1230137993831,4cyclictest1373110-21munin-plugin-st00:05:012
1230137993831,4cyclictest1354789-21systemd-run23:35:012
1230137993831,4cyclictest1354789-21systemd-run23:35:012
1230137993830,5cyclictest1365147-21proc_pri23:50:422
1230136993831,4cyclictest1394419-21idleruntime-cro00:40:011
1230136993825,10cyclictest1389183-21latency00:30:321
1230135993830,5cyclictest1283019-21timerwakeupswit21:35:480
1230135993828,3cyclictest1000-21mta-sts-daemon22:55:490
1230135993827,8cyclictest1380172-21needreboot00:15:340
1230135993827,8cyclictest1380172-21needreboot00:15:340
1230137993729,5cyclictest1392025-21fschecks_count00:35:302
1230137993729,5cyclictest1243613-21sh19:55:012
1230137993728,6cyclictest0-21swapper/222:55:392
123013799372,29cyclictest1282568-21sh21:35:382
123013799370,6cyclictest171rcu_preempt22:45:342
1230135993731,4cyclictest1290670-21cron21:50:000
1230135993731,4cyclictest1290670-21cron21:50:000
1230135993730,4cyclictest1373129-21systemd-run00:05:020
1230135993730,4cyclictest1339601-21latency_hist23:10:010
1230135993730,4cyclictest1291580-21missed_timers21:50:330
1230135993730,4cyclictest1291580-21missed_timers21:50:330
1230135993729,5cyclictest1353176-21awk23:30:490
1230135993729,5cyclictest1353176-21awk23:30:490
1230135993728,6cyclictest3694966-21cups-browsed23:29:470
1230135993728,6cyclictest3694966-21cups-browsed23:29:470
1230135993723,3cyclictest171rcu_preempt23:45:010
123013599371,12cyclictest14-21ksoftirqd/020:00:380
1230137993630,3cyclictest0-21swapper/200:00:012
1230137993629,3cyclictest0-21swapper/221:10:012
1230137993628,5cyclictest1245148-21systemd-run20:00:012
1230137993623,9cyclictest1-21systemd00:20:282
1230137993623,9cyclictest1-21systemd00:20:282
1230137993614,17cyclictest3694966-21cups-browsed19:10:362
1230136993629,3cyclictest0-21swapper/122:30:421
1230136993628,5cyclictest1360877-21awk23:45:011
1230136993628,5cyclictest1-21systemd19:50:011
1230135993630,4cyclictest1278443-21latency_hist21:30:020
1230135993611,21cyclictest1386434-21ssh00:25:420
1230135993611,21cyclictest1386434-21ssh00:25:420
1230137993527,5cyclictest1239123-21systemctl19:40:002
1230137993527,5cyclictest1239123-21systemctl19:40:002
1230137993526,5cyclictest1249638-21systemd-run20:15:012
1230137993525,7cyclictest1272289-21idleruntime-cro21:20:012
123013799351,26cyclictest1319314-21ssh22:35:372
1230136993529,4cyclictest1376170-21sh00:10:011
1230136993529,3cyclictest1255587-21kworker/u8:2-xprtiod21:05:261
1230136993529,3cyclictest0-21swapper/100:00:011
1230136993528,4cyclictest1363936-21systemd-run23:50:011
1230136993528,4cyclictest1003-21mta-sts-daemon22:00:361
1230136993527,5cyclictest1335100-21grep23:00:501
1230136993527,5cyclictest1335100-21grep23:00:501
1230136993527,5cyclictest1287635-21munin-plugin-st21:45:011
1230136993527,5cyclictest1287635-21munin-plugin-st21:45:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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