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2026-04-14 - 06:31

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 Tue Apr 14, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1382615997058,5cyclictest0-21swapper/223:32:012
1382614996350,9cyclictest420-21avahi-daemon22:05:251
1382613996133,25cyclictest1489059-21munin-plugin-st22:40:010
1382613996133,25cyclictest1489059-21munin-plugin-st22:40:010
1382615995847,6cyclictest0-21swapper/222:40:012
1382615995847,6cyclictest0-21swapper/222:40:012
1382614995629,7cyclictest171rcu_preempt22:10:391
1382615995544,7cyclictest3615537-21cups-browsed21:42:392
1382613995543,9cyclictest1501942-21proc_pri22:55:420
1382613995543,9cyclictest1501942-21proc_pri22:55:420
1382615995426,24cyclictest1523895-21latency_hist23:25:022
1382614995443,7cyclictest439-21systemd-logind21:30:011
1382614995342,7cyclictest1508382-21cron23:05:001
1382615995217,4cyclictest0-21swapper/219:56:092
1382615995128,20cyclictest1418624-21sh21:10:012
1382615995127,21cyclictest1581052-21idleruntime-cro00:40:012
1382615995127,21cyclictest1581052-21idleruntime-cro00:40:012
1382614995145,3cyclictest0-21swapper/100:20:011
1382613995036,6cyclictest1424111-21sendmail_mailqu21:16:070
1382615994941,5cyclictest1550373-21cron00:00:002
138261599483,9cyclictest1490187-21ssh22:40:352
1382615994832,12cyclictest0-21swapper/200:15:382
1382614994838,4cyclictest0-21swapper/122:00:391
1382613994825,20cyclictest3615537-21cups-browsed22:00:380
1382615994719,5cyclictest1424326-21timerandwakeup21:16:112
1382615994719,4cyclictest0-21swapper/222:04:112
138261499470,18cyclictest28-21ksoftirqd/120:15:431
1382613994741,4cyclictest151ktimers/022:45:380
1382613994737,7cyclictest151ktimers/020:25:430
138261599464,13cyclictest1501882-21ssh22:55:412
138261599464,13cyclictest1501882-21ssh22:55:412
1382615994639,4cyclictest1434514-21grep21:30:002
1382615994636,6cyclictest420-21avahi-daemon21:10:332
138261399461,39cyclictest1574777-21ps00:30:440
138261599452,17cyclictest1439754-21ssh21:35:382
1382615994519,3cyclictest0-21swapper/200:30:412
1382614994538,4cyclictest0-21swapper/121:20:431
1382614994538,4cyclictest0-21swapper/121:20:431
1382614994521,6cyclictest0-21swapper/120:25:421
138261399452,26cyclictest1532637-21ntpq23:35:390
1382615994436,5cyclictest0-21swapper/219:10:422
138261599443,19cyclictest1505712-21ssh23:00:382
1382614994436,5cyclictest1394617-21systemd-run19:50:011
1382614994434,7cyclictest1547416-21if_wlan023:55:301
1382614994434,7cyclictest1523695-21idleruntime-cro23:25:011
1382613994429,12cyclictest1396160-21latency_hist19:55:020
138261399441,38cyclictest0-21swapper/019:10:380
138261399441,15cyclictest1418044-21ntpq21:05:380
138261399441,11cyclictest1388064-21ntpq19:25:380
1382615994334,6cyclictest1450396-21systemd-run21:50:012
1382614994336,4cyclictest0-21swapper/123:10:451
1382614994335,5cyclictest1482212-21gltestperf22:30:341
1382614994335,5cyclictest1397635-21latency_hist20:00:021
1382613994336,4cyclictest1473777-21systemd-run22:20:010
138261399433,31cyclictest1528803-21ssh23:30:410
1382613994313,28cyclictest1558500-21/usr/sbin/munin00:10:300
138261399431,11cyclictest1404461-21ntpq20:20:380
138261399430,12cyclictest1435645-21ntpq21:30:360
1382615994234,5cyclictest1473741-21munin-run22:20:012
138261599423,21cyclictest1513369-21ssh23:10:382
1382615994219,6cyclictest1418597-21diskmemload22:45:422
1382614994236,3cyclictest0-21swapper/123:35:491
138261399423,34cyclictest1397068-21ntpq19:55:400
1382613994231,5cyclictest12350irq/32-eth022:50:400
138261399422,35cyclictest1416460-21ntpq21:00:350
138261399422,35cyclictest1400045-21ntpq20:05:380
138261399421,38cyclictest1393962-21ntpq19:45:360
138261599413,17cyclictest1567093-21rm00:20:422
1382615994125,12cyclictest1435549-21missed_timers21:30:342
1382615994120,3cyclictest0-21swapper/222:10:012
138261499419,28cyclictest1478828-21ssh22:25:381
1382614994133,4cyclictest0-21swapper/123:00:011
1382614994133,4cyclictest0-21swapper/123:00:011
1382614994132,6cyclictest1442515-21munin-plugin-st21:40:001
138261399416,32cyclictest1509090-21/usr/sbin/munin23:05:300
138261399416,32cyclictest1475815-21ssh22:21:170
138261399414,35cyclictest1452808-21ssh21:52:020
1382613994135,4cyclictest1439125-21aten_r2power_vo21:35:260
1382613994133,6cyclictest151ktimers/019:15:400
1382613994132,5cyclictest1517549-21switchtime23:15:490
138261399412,36cyclictest1455556-21ntpq21:55:400
138261399412,35cyclictest1409014-21ntpq20:35:390
138261399412,35cyclictest1409014-21ntpq20:35:390
1382613994118,20cyclictest420-21avahi-daemon19:35:010
138261399411,6cyclictest1563039-21ntpq00:15:340
138261399411,5cyclictest1544081-21ntpq23:50:410
138261399411,12cyclictest1422471-21ssh21:14:560
138261399411,12cyclictest1410460-21ntpq20:40:350
138261399411,10cyclictest1447638-21ntpq21:45:340
138261399410,4cyclictest1514730-21ssh23:12:160
138261399410,4cyclictest1466367-21ssh22:10:230
138261399410,39cyclictest1433933-21ssh21:28:520
138261399410,38cyclictest1568317-21ssh00:22:150
138261399410,14cyclictest1462339-21ssh22:05:040
138261599403,11cyclictest3615533-21cupsd19:30:412
1382615994027,8cyclictest0-21swapper/223:50:272
138261599402,18cyclictest1455577-21ntpq21:55:412
1382614994033,3cyclictest0-21swapper/122:15:411
1382614994018,4cyclictest171rcu_preempt22:40:341
138261399409,28cyclictest1537634-21ssh23:42:060
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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