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2026-05-01 - 03:50

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 Fri May 01, 2026 00:43:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1433848996134,22cyclictest1542236-21latency_hist22:40:021
1433848995932,23cyclictest420-21avahi-daemon22:00:021
1433848995932,23cyclictest420-21avahi-daemon22:00:021
1433848995448,3cyclictest0-21swapper/122:45:011
1433848995448,3cyclictest0-21swapper/122:45:011
1433848995430,21cyclictest1498053-21ssh21:45:021
1433849995243,6cyclictest1594333-21cron23:45:002
1433848995133,14cyclictest0-21swapper/100:21:071
1433848995125,22cyclictest0-21swapper/121:55:011
1433848995123,25cyclictest1625746-21aten_r2power_po00:25:391
143384899496,6cyclictest1551394-21ssh22:50:441
1433848994940,6cyclictest1558264-21systemd-run23:00:011
1433848994939,7cyclictest538-21wpa_supplicant22:25:501
1433848994928,18cyclictest1587451-21needreboot23:35:421
1433848994928,18cyclictest1587451-21needreboot23:35:421
1433848994918,7cyclictest0-21swapper/123:15:571
1433847994941,5cyclictest1546144-21idleruntime-cro22:45:010
1433847994941,5cyclictest1546144-21idleruntime-cro22:45:010
1433847994928,12cyclictest12350irq/32-eth023:40:460
143384999484,37cyclictest1551440-21ssh22:50:452
1433848994838,7cyclictest3838849-21cups-browsed20:00:501
1433848994822,3cyclictest0-21swapper/121:30:461
1433848994815,8cyclictest1479257-21sh21:20:441
1433848994815,8cyclictest1479257-21sh21:20:441
1433848994737,6cyclictest1633165-21latency_hist00:35:031
1433848994723,3cyclictest0-21swapper/100:20:011
1433848994715,7cyclictest0-21swapper/120:10:551
143384799473,35cyclictest1515422-21ssh22:05:500
1433848994623,3cyclictest0-21swapper/122:45:571
1433848994623,3cyclictest0-21swapper/122:45:571
1433848994620,5cyclictest1562264-21grep23:05:011
1433849994535,4cyclictest0-21swapper/223:25:452
1433848994525,3cyclictest0-21swapper/121:16:221
1433848994525,3cyclictest0-21swapper/121:16:221
1433848994520,5cyclictest1608285-21ssh00:01:011
1433849994436,5cyclictest1482105-21systemd-run21:25:012
1433849994436,5cyclictest1482105-21systemd-run21:25:012
143384899442,20cyclictest1523360-21awk22:15:481
1433847994415,21cyclictest1563649-21ssh23:05:520
1433847994413,26cyclictest1599645-21ssh23:50:470
1433848994335,6cyclictest0-21swapper/121:40:011
1433848994333,6cyclictest1442921-21systemd-run19:40:011
1433848994319,4cyclictest1579110-21fschecks_count23:25:371
1433847994335,5cyclictest1613418-21latency_hist00:10:020
143384999424,35cyclictest3838849-21cups-browsed21:45:432
143384899426,13cyclictest1634212-21ssh00:35:441
143384899425,16cyclictest428-21mta-sts-daemon19:55:441
1433847994234,5cyclictest1478010-21ls21:20:010
1433847994234,5cyclictest1478010-21ls21:20:010
1433847994230,9cyclictest1606418-21munin-plugin-st00:00:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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