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2025-12-24 - 05:47

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #8

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 rackcslot8s.osadl.org (updated Wed Dec 24, 2025 00:46:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1920626333,16sleep70-21swapper/719:05:037
111391620,5ptp4l0-21swapper/519:07:485
111391600,6ptp4l0-21swapper/119:06:501
111391600,5ptp4l0-21swapper/019:08:550
111391570,5ptp4l0-21swapper/419:08:564
2096925232,6sleep30-21swapper/319:08:033
2081825242,6sleep20-21swapper/219:06:112
2076624939,6sleep60-21swapper/619:05:266
21395994410,11cyclictest0-21swapper/121:35:111
111391320,0ptp4l0-21swapper/000:20:000
111391310,0ptp4l0-21swapper/521:40:195
111391300,0ptp4l0-21swapper/120:40:151
111391300,0ptp4l0-21swapper/119:42:091
111391280,1ptp4l8052-21missed_timers00:30:165
111391280,0ptp4l0-21swapper/122:50:161
111391260,0ptp4l0-21swapper/120:10:201
111391260,0ptp4l0-21swapper/120:10:191
111391250,6ptp4l0-21swapper/521:11:025
111391250,1ptp4l21569-21latency_hist20:20:015
111391250,1ptp4l21569-21latency_hist20:20:005
111391250,1ptp4l19671-21df21:25:124
111391250,1ptp4l19561-21irqstats23:45:181
111391250,0ptp4l0-21swapper/523:30:135
111391250,0ptp4l0-21swapper/523:25:115
111391250,0ptp4l0-21swapper/523:05:155
111391250,0ptp4l0-21swapper/519:30:145
111391250,0ptp4l0-21swapper/422:35:144
111391250,0ptp4l0-21swapper/420:39:174
111391250,0ptp4l0-21swapper/122:19:101
111391250,0ptp4l0-21swapper/120:20:171
111391250,0ptp4l0-21swapper/120:00:141
111391250,0ptp4l0-21swapper/119:50:211
111391240,7ptp4l0-21swapper/121:16:541
111391240,5ptp4l7366-21kworker/1:223:27:481
111391240,1ptp4l32178-21sed19:30:160
111391240,1ptp4l2965-21smartctl00:20:141
111391240,1ptp4l29364-21fw_forwarded_lo19:25:141
111391240,1ptp4l18277-21strings20:10:205
111391240,1ptp4l18277-21strings20:10:205
111391240,1ptp4l16579-21latency_hist22:30:015
111391240,1ptp4l1440-21irqstats21:55:151
111391240,0ptp4l0-21swapper/522:40:135
111391240,0ptp4l0-21swapper/521:56:535
111391240,0ptp4l0-21swapper/519:50:005
111391240,0ptp4l0-21swapper/519:15:005
111391240,0ptp4l0-21swapper/423:55:174
111391240,0ptp4l0-21swapper/422:55:184
111391240,0ptp4l0-21swapper/422:55:174
111391240,0ptp4l0-21swapper/122:45:201
111391240,0ptp4l0-21swapper/122:25:121
111391240,0ptp4l0-21swapper/121:45:191
111391240,0ptp4l0-21swapper/120:55:131
111391240,0ptp4l0-21swapper/120:30:011
111391240,0ptp4l0-21swapper/100:28:211
111391230,1ptp4l32419-21cut19:30:184
111391230,1ptp4l3172-21cpu22:00:110
111391230,1ptp4l30708-21fw_conntrack00:10:141
111391230,1ptp4l17570-21if_err_virbr0-n21:20:144
111391230,1ptp4l15358-21fw_forwarded_lo20:05:121
111391230,1ptp4l12835-21cut22:20:145
111391230,1ptp4l12391-21munin-run20:00:003
111391230,1ptp4l10942-21if_virbr019:55:151
111391230,0ptp4l31242-21sed00:10:175
111391230,0ptp4l0-21swapper/523:50:105
111391230,0ptp4l0-21swapper/523:40:205
111391230,0ptp4l0-21swapper/523:15:205
111391230,0ptp4l0-21swapper/523:00:165
111391230,0ptp4l0-21swapper/522:55:185
111391230,0ptp4l0-21swapper/522:55:185
111391230,0ptp4l0-21swapper/522:10:195
111391230,0ptp4l0-21swapper/522:05:225
111391230,0ptp4l0-21swapper/521:50:015
111391230,0ptp4l0-21swapper/521:25:005
111391230,0ptp4l0-21swapper/521:09:555
111391230,0ptp4l0-21swapper/520:55:105
111391230,0ptp4l0-21swapper/520:50:195
111391230,0ptp4l0-21swapper/520:48:425
111391230,0ptp4l0-21swapper/520:05:135
111391230,0ptp4l0-21swapper/519:55:165
111391230,0ptp4l0-21swapper/519:50:145
111391230,0ptp4l0-21swapper/519:37:185
111391230,0ptp4l0-21swapper/519:25:095
111391230,0ptp4l0-21swapper/519:20:125
111391230,0ptp4l0-21swapper/500:35:155
111391230,0ptp4l0-21swapper/500:25:125
111391230,0ptp4l0-21swapper/500:15:115
111391230,0ptp4l0-21swapper/500:00:125
111391230,0ptp4l0-21swapper/423:40:134
111391230,0ptp4l0-21swapper/423:20:194
111391230,0ptp4l0-21swapper/421:50:164
111391230,0ptp4l0-21swapper/420:00:154
111391230,0ptp4l0-21swapper/400:05:174
111391230,0ptp4l0-21swapper/123:50:121
111391230,0ptp4l0-21swapper/123:40:191
111391230,0ptp4l0-21swapper/123:35:131
111391230,0ptp4l0-21swapper/123:30:141
111391230,0ptp4l0-21swapper/123:15:131
111391230,0ptp4l0-21swapper/122:09:371
111391230,0ptp4l0-21swapper/122:03:421
111391230,0ptp4l0-21swapper/121:50:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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