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2025-12-08 - 09:00

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Default latency plot of shadow in rack #c, 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 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 rackcslot7s.osadl.org (updated Mon Dec 08, 2025 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
278655827959,14sleep20-21swapper/219:08:562
28784522780,7sleep31753-21gnome-shell23:30:023
278638227548,17sleep30-21swapper/319:06:433
278660927140,25sleep10-21swapper/119:09:361
28545922660,24sleep30-21swapper/322:20:233
27965712660,7sleep20-21swapper/219:35:192
278635926543,15sleep00-21swapper/019:06:250
162399640,9rtkit-daemon1622-21rtkit-daemon22:37:030
162399640,8rtkit-daemon1622-21rtkit-daemon00:36:241
162399640,8rtkit-daemon1622-21rtkit-daemon00:36:241
162399610,8rtkit-daemon1622-21rtkit-daemon20:34:201
162399610,8rtkit-daemon1622-21rtkit-daemon20:34:191
28801672600,10chrt2880154-21perf23:35:002
2786775996017,10cyclictest2789322-21ls19:15:160
162399600,8rtkit-daemon1622-21rtkit-daemon22:45:401
162399600,8rtkit-daemon1622-21rtkit-daemon20:50:421
162399590,8rtkit-daemon1622-21rtkit-daemon19:33:551
162399590,8rtkit-daemon1622-21rtkit-daemon19:18:131
27961752580,20sleep342-21ksoftirqd/319:35:133
162399580,8rtkit-daemon1622-21rtkit-daemon21:16:041
28373922570,4sleep00-21swapper/021:30:330
278677599572,8cyclictest1753-21gnome-shell22:06:540
162399550,8rtkit-daemon1622-21rtkit-daemon22:39:451
2786775995423,8cyclictest1753-21gnome-shell20:29:010
162399530,8rtkit-daemon1622-21rtkit-daemon00:00:361
2786775995218,12cyclictest854-21avahi-daemon00:00:050
278677599520,47cyclictest1622-21rtkit-daemon00:39:290
278677599520,47cyclictest1622-21rtkit-daemon00:39:280
28811362510,6sleep32197014-21PK-Backend23:35:253
28780002500,3sleep10-21swapper/123:25:321
28047412490,7chrt0-21swapper/120:00:021
28933202470,6sleep01753-21gnome-shell00:10:230
2786779994719,12cyclictest2894053-21/usr/sbin/munin00:15:001
2786775994715,10cyclictest1753-21gnome-shell21:28:110
278677599470,42cyclictest1622-21rtkit-daemon19:33:280
28561332460,7sleep1251rcuc/122:25:151
278678499459,10cyclictest42-21ksoftirqd/321:33:233
2786784994517,23cyclictest42-21ksoftirqd/320:05:203
2786784994517,10cyclictest1753-21gnome-shell19:16:453
278678499451,39cyclictest1-21systemd23:00:013
2786781994534,7cyclictest1069-21runrttasks22:13:562
2786781994529,12cyclictest2885365-21munin-run23:50:012
2786781994529,12cyclictest2885365-21munin-run23:50:002
2786781994514,8cyclictest28933312ntp_states00:10:252
2786775994536,6cyclictest181irq_work/021:48:450
162399450,33rtkit-daemon0-21swapper/319:10:473
28246472440,5sleep00-21swapper/020:55:220
28073342440,6sleep22786769-21cyclictest20:05:262
278678499449,16cyclictest1753-21gnome-shell19:55:463
29010622430,7chrt0-21swapper/200:35:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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