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2026-06-14 - 04:37

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 Sun Jun 14, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1720113996035,21cyclictest1885045-21grep00:35:012
1720111995939,14cyclictest12650irq/32-eth023:00:280
1720113995725,29cyclictest1748612-21sh20:45:012
172011299557,34cyclictest1835911-21ssh23:15:301
1720113995342,8cyclictest1797210-21ssh22:15:022
172011199521,45cyclictest0-21swapper/019:20:250
1720113995026,5cyclictest1888326-21latency_hist00:40:022
172011199502,41cyclictest1867352-21ntpq00:05:320
172011199491,44cyclictest0-21swapper/022:20:330
1720113994838,6cyclictest1831683-21latency_hist23:10:022
172011399482,24cyclictest4189336-21cupsd21:00:282
172011399481,19cyclictest1810763-21sh22:35:282
1720111994839,6cyclictest1739603-21systemd-run20:15:010
1720113994738,6cyclictest1730615-21systemd-run19:45:012
1720111994731,14cyclictest1839182-21wc23:20:370
1720113994635,4cyclictest0-21swapper/221:35:302
172011199464,36cyclictest1740547-21ntpq20:15:310
1720111994637,6cyclictest265-21systemd-journal22:01:270
1720113994538,4cyclictest1841155-21latency_hist23:25:022
1720113994534,8cyclictest1798479-21mailstats22:15:352
172011399453,21cyclictest1726992-21sshd19:30:262
172011399453,14cyclictest428-21mta-sts-daemon23:40:302
172011299452,36cyclictest1842088-21ssh23:25:261
1720112994522,12cyclictest0-21swapper/120:30:301
1720111994514,27cyclictest1817200-21ssh22:45:330
1720112994438,4cyclictest0-21swapper/122:55:241
1720112994438,4cyclictest0-21swapper/122:55:241
172011299443,36cyclictest1782413-21ssh21:50:251
1720112994427,12cyclictest1826208-21missed_timers23:00:231
1720111994436,5cyclictest12650irq/32-eth023:50:240
1720111994433,7cyclictest151ktimers/020:30:230
172011199442,36cyclictest1743525-21ntpq20:25:280
172011199441,40cyclictest1734493-21ntpq19:55:260
172011199441,40cyclictest1734493-21ntpq19:55:260
172011199441,39cyclictest1886120-21ntpq00:35:290
172011199441,38cyclictest1728449-21ntpq19:35:250
172011399433,32cyclictest421-21dbus-daemon19:20:252
1720112994335,5cyclictest1863087-21ssh00:00:021
1720112994335,5cyclictest1863087-21ssh00:00:021
1720112994332,6cyclictest1769897-21ssh21:30:281
1720112994310,6cyclictest171rcu_preempt00:15:291
172011199435,31cyclictest1863043-21munin-run00:00:010
172011199435,31cyclictest1863043-21munin-run00:00:010
172011199431,38cyclictest1722442-21ntpq19:15:230
172011199431,37cyclictest1845230-21ntpq23:30:250
1720113994234,5cyclictest1788771-21sshd22:00:262
1720112994232,5cyclictest0-21swapper/121:25:271
172011199427,32cyclictest1752437-21ntpq20:55:240
172011199421,38cyclictest1779303-21modprobe21:45:250
172011199421,37cyclictest1747968-21ntpq20:40:260
172011199421,36cyclictest1763562-21ntpq21:20:290
172011199421,35cyclictest1864217-21ntpq00:00:330
172011199420,38cyclictest1776158-21ntpq21:40:260
1720113994130,7cyclictest4189339-21cups-browsed20:30:022
172011399412,33cyclictest1776295-21ssh21:40:312
1720112994132,6cyclictest439-21systemd-logind00:40:021
172011199412,34cyclictest1813918-21ntpq22:40:270
172011199411,37cyclictest1782415-21ntpq21:50:250
172011199411,37cyclictest1769796-21ntpq21:30:250
172011199411,37cyclictest1721061-21ntpq19:10:290
172011199411,36cyclictest1811401-21ssh22:35:420
172011199411,36cyclictest1798237-21ntpq22:15:270
172011199411,36cyclictest1729953-21ntpq19:40:240
172011199411,30cyclictest1760375-21ntp_states21:15:300
1720113994031,5cyclictest0-21swapper/221:20:272
172011199402,34cyclictest1832616-21ntpq23:10:220
172011199402,34cyclictest1786858-21apt-get21:57:280
172011199402,34cyclictest1737574-21ntpq20:05:350
172011199402,34cyclictest1726976-21ntpq19:30:250
172011199402,26cyclictest1851514-21ntpq23:40:280
172011199401,36cyclictest1835778-21ntpq23:15:250
172011199401,36cyclictest1757105-21ntpq21:10:260
172011199401,36cyclictest1746548-21ntpq20:35:300
172011199401,35cyclictest1795014-21ntpq22:10:220
172011199401,35cyclictest1753944-21ntpq21:00:250
172011199401,35cyclictest1741986-21ntpq20:20:270
172011199401,34cyclictest1879859-21ntpq00:25:280
172011199401,34cyclictest1804496-21ntpq22:25:270
172011199401,34cyclictest1791954-21ntpq22:05:270
172011199401,34cyclictest1731575-21ntpq19:45:310
172011199401,28cyclictest1848426-21ntpq23:35:290
1720111994012,22cyclictest1876653-21sshd00:20:270
1720113993933,3cyclictest1856794-21kworker/u8:6+xprtiod00:00:012
1720113993933,3cyclictest1856794-21kworker/u8:6+xprtiod00:00:012
172011299393,12cyclictest1883007-21ntpq00:30:301
172011199391,35cyclictest1808607-21ssh22:31:450
172011199391,35cyclictest1754819-21munin-node21:05:150
172011199391,35cyclictest1735941-21ntpq20:00:250
172011199391,35cyclictest1735941-21ntpq20:00:250
172011199391,35cyclictest1732822-21memory19:50:230
172011199391,34cyclictest1750934-21ntpq20:50:250
172011199391,34cyclictest1749451-21ntpq20:45:230
172011199390,34cyclictest1825243-21ssh22:59:460
172011199390,34cyclictest1825243-21ssh22:59:460
1720113993831,4cyclictest1825348-21idleruntime-cro23:00:002
1720113993831,4cyclictest1825348-21idleruntime-cro23:00:002
1720113993826,8cyclictest1855133-21timerwakeupswit23:45:382
172011399382,27cyclictest1779367-21ssh21:45:272
1720112993828,5cyclictest0-21swapper/121:45:261
1720112993826,5cyclictest0-21swapper/120:45:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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