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2026-06-25 - 06:51

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 Thu Jun 25, 2026 00:43:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
151270499514,38cyclictest1549812-21ssh21:10:342
151270499514,38cyclictest1549812-21ssh21:10:342
1512702995137,11cyclictest1548710-21systemd-run21:10:010
1512702995137,11cyclictest1548710-21systemd-run21:10:010
1512702994933,8cyclictest1576575-21ssh21:55:010
1512703994839,6cyclictest1548683-21diskmemload22:35:301
1512703994838,6cyclictest1-21systemd21:40:011
1512702994828,15cyclictest12650irq/32-eth023:30:370
1512702994828,14cyclictest151ktimers/000:15:340
1512704994738,5cyclictest1553078-21mailstats21:15:442
1512703994638,5cyclictest1-21systemd23:40:011
1512703994635,4cyclictest1000-21mta-sts-daemon21:25:291
1512704994536,6cyclictest1657426-21if_eth000:05:252
1512704994536,5cyclictest3953742-21cups-browsed23:48:372
1512702994438,4cyclictest1678036-21munin-run00:40:010
1512703994333,6cyclictest420-21avahi-daemon23:20:321
1512702994335,5cyclictest0-21swapper/000:00:390
151270299433,33cyclictest1617708-21ssh23:00:320
151270299433,33cyclictest1593051-21ssh22:20:310
1512704994228,10cyclictest1605134-21latency22:40:252
151270399425,33cyclictest1633157-21ssh23:25:311
1512702994231,9cyclictest1648110-21sh23:50:250
1512704994133,5cyclictest1675029-21latency_hist00:35:022
1512703994134,4cyclictest1638259-21munin-plugin-st23:35:011
1512703994130,7cyclictest421-21dbus-daemon00:30:411
1512702994135,4cyclictest1554891-21munin-run21:20:010
1512702994135,4cyclictest1538202-21systemd-run20:35:010
151270299413,33cyclictest1562193-21ssh21:30:320
1512702994119,13cyclictest151ktimers/020:25:280
1512702994114,21cyclictest1568386-21ssh21:40:300
151270499403,30cyclictest421-21dbus-daemon19:55:292
1512704994022,11cyclictest1574606-21ssh21:50:342
1512703994033,4cyclictest1585850-21cron22:10:011
151270499394,27cyclictest1642370-21ssh23:40:302
1512704993931,5cyclictest1619827-21latency_hist23:05:022
1512703993931,5cyclictest1599457-21mailstats22:30:391
1512703993930,6cyclictest1514210-21systemd-run19:15:021
1512703993928,7cyclictest3953742-21cups-browsed22:49:211
1512703993921,3cyclictest171rcu_preempt23:59:351
1512702993933,4cyclictest1604328-21sendmail22:40:010
1512702993924,8cyclictest12650irq/32-eth000:10:320
151270499383,29cyclictest1667018-21ssh00:20:362
1512704993830,5cyclictest1662799-21cron00:15:012
1512704993829,6cyclictest420-21avahi-daemon22:04:372
1512704993829,5cyclictest1641369-21sendmail23:40:012
1512704993828,6cyclictest1607872-21aten_r2power_po22:45:202
1512704993820,10cyclictest0-21swapper/222:35:312
151270399387,23cyclictest1657783-21ssh00:05:321
151270399383,30cyclictest1623950-21ssh23:10:341
151270399383,27cyclictest1605308-21rm22:40:281
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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