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2025-12-10 - 06:17

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 10, 2025 00:46:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
46992970,0sleep70-21swapper/721:53:097
242612690,0sleep70-21swapper/723:05:207
242612690,0sleep70-21swapper/723:05:207
33962620,0sleep40-21swapper/421:05:014
1392426151,6sleep60-21swapper/619:05:466
114091600,29ptp4l0-21swapper/119:05:201
114091590,5ptp4l0-21swapper/519:07:125
263912570,1sleep6631rcuc/621:38:116
209862560,0sleep50-21swapper/523:46:285
1419325645,6sleep30-21swapper/319:09:043
175892550,0sleep30-21swapper/323:41:453
2120915332,7phc2sys0-21swapper/419:06:314
1422425343,6sleep70-21swapper/719:09:317
1401925040,6sleep20-21swapper/219:06:542
1412524635,7sleep00-21swapper/019:08:120
114091310,0ptp4l0-21swapper/621:30:196
114091310,0ptp4l0-21swapper/123:50:421
114091310,0ptp4l0-21swapper/123:25:131
114091310,0ptp4l0-21swapper/023:30:130
114091300,0ptp4l0-21swapper/200:25:232
114091290,0ptp4l0-21swapper/521:18:105
114091290,0ptp4l0-21swapper/421:10:124
114091290,0ptp4l0-21swapper/122:06:401
114091280,0ptp4l0-21swapper/621:20:176
114091280,0ptp4l0-21swapper/423:38:284
114091280,0ptp4l0-21swapper/221:26:052
114091270,0ptp4l0-21swapper/523:18:235
114091270,0ptp4l0-21swapper/523:13:005
114091270,0ptp4l0-21swapper/400:04:154
114091270,0ptp4l0-21swapper/123:31:451
114091270,0ptp4l0-21swapper/122:53:501
114091270,0ptp4l0-21swapper/122:04:591
114091270,0ptp4l0-21swapper/119:50:171
114091270,0ptp4l0-21swapper/100:35:021
114091270,0ptp4l0-21swapper/023:50:160
114091270,0ptp4l0-21swapper/021:54:450
1456099268,14cyclictest0-21swapper/520:18:235
114091260,0ptp4l0-21swapper/523:59:255
114091260,0ptp4l0-21swapper/522:47:335
114091260,0ptp4l0-21swapper/522:30:445
114091260,0ptp4l0-21swapper/423:55:234
114091260,0ptp4l0-21swapper/423:47:584
114091260,0ptp4l0-21swapper/400:21:294
114091260,0ptp4l0-21swapper/223:45:162
114091260,0ptp4l0-21swapper/223:43:462
114091260,0ptp4l0-21swapper/122:10:181
114091260,0ptp4l0-21swapper/121:41:371
114091260,0ptp4l0-21swapper/121:05:131
114091260,0ptp4l0-21swapper/023:35:170
114091260,0ptp4l0-21swapper/023:09:210
114091260,0ptp4l0-21swapper/023:09:200
114091260,0ptp4l0-21swapper/022:27:080
114091260,0ptp4l0-21swapper/021:49:470
114091250,3ptp4l0-21swapper/422:50:464
114091250,2ptp4l24062-21sort20:40:015
114091250,0ptp4l0-21swapper/623:44:556
114091250,0ptp4l0-21swapper/600:25:036
114091250,0ptp4l0-21swapper/600:16:106
114091250,0ptp4l0-21swapper/523:36:315
114091250,0ptp4l0-21swapper/522:08:035
114091250,0ptp4l0-21swapper/521:55:005
114091250,0ptp4l0-21swapper/521:34:525
114091250,0ptp4l0-21swapper/519:50:175
114091250,0ptp4l0-21swapper/321:53:063
114091250,0ptp4l0-21swapper/222:34:482
114091250,0ptp4l0-21swapper/222:14:012
114091250,0ptp4l0-21swapper/221:35:512
114091250,0ptp4l0-21swapper/200:30:382
114091250,0ptp4l0-21swapper/123:36:491
114091250,0ptp4l0-21swapper/123:11:151
114091250,0ptp4l0-21swapper/121:55:321
114091250,0ptp4l0-21swapper/121:10:161
114091250,0ptp4l0-21swapper/120:40:161
114091250,0ptp4l0-21swapper/023:15:180
114091250,0ptp4l0-21swapper/022:51:400
114091250,0ptp4l0-21swapper/021:28:070
114091250,0ptp4l0-21swapper/019:45:160
114091250,0ptp4l0-21swapper/000:03:110
114091240,1ptp4l24746-21sed21:35:171
114091240,1ptp4l23286-21latency_hist22:20:004
114091240,1ptp4l19724-21irqstats23:45:166
114091240,1ptp4l17633-21grep22:10:185
114091240,1ptp4l16268-21users19:10:211
114091240,1ptp4l13108-21df20:15:174
114091240,1ptp4l1093-21runrttasks21:34:551
114091240,0ptp4l0-21swapper/622:08:306
114091240,0ptp4l0-21swapper/621:54:126
114091240,0ptp4l0-21swapper/621:12:106
114091240,0ptp4l0-21swapper/620:55:216
114091240,0ptp4l0-21swapper/600:23:276
114091240,0ptp4l0-21swapper/600:06:016
114091240,0ptp4l0-21swapper/523:40:195
114091240,0ptp4l0-21swapper/522:43:515
114091240,0ptp4l0-21swapper/522:40:015
114091240,0ptp4l0-21swapper/522:25:265
114091240,0ptp4l0-21swapper/521:45:155
114091240,0ptp4l0-21swapper/521:40:155
114091240,0ptp4l0-21swapper/521:10:195
114091240,0ptp4l0-21swapper/519:15:185
114091240,0ptp4l0-21swapper/500:35:445
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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