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2026-06-30 - 09:07

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #6

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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  Intel
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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack1slot6s.osadl.org (updated Tue Jun 30, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
283322730,6sleep028335-21df_abs20:50:070
2794199694,57cyclictest0-21swapper/020:55:070
219499690,5rtkit-daemon2193-21rtkit-daemon23:07:563
2794199685,12cyclictest0-21swapper/023:19:230
2794199684,13cyclictest0-21swapper/023:29:550
2794199674,55cyclictest0-21swapper/021:35:070
2794699664,54cyclictest0-21swapper/221:00:242
2794699664,53cyclictest0-21swapper/222:20:092
2794699655,52cyclictest0-21swapper/223:45:002
2794699655,52cyclictest0-21swapper/221:05:052
2794699655,52cyclictest0-21swapper/221:05:052
2794699653,55cyclictest23292-21taskset23:53:242
2794699653,55cyclictest23292-21taskset23:53:242
27945996538,20cyclictest0-21swapper/123:15:091
2794199654,53cyclictest0-21swapper/021:49:580
2794199654,52cyclictest0-21swapper/023:45:160
2794199654,13cyclictest0-21swapper/021:23:380
2794199654,13cyclictest0-21swapper/019:25:100
236822654,54sleep00-21swapper/023:54:440
236822654,54sleep00-21swapper/023:54:440
27972643,10sleep00-21swapper/018:54:550
2794199644,13cyclictest0-21swapper/021:15:050
27941996411,28cyclictest0-21swapper/022:27:280
2794699634,52cyclictest0-21swapper/223:40:182
2794699634,51cyclictest0-21swapper/220:34:512
2794699634,51cyclictest0-21swapper/220:34:512
2794699633,52cyclictest0-21swapper/221:20:222
2794699633,51cyclictest0-21swapper/221:10:232
27945996342,13cyclictest0-21swapper/123:20:161
2794199635,48cyclictest27350-21df_abs19:45:060
2794199635,48cyclictest27350-21df_abs19:45:060
2794199634,52cyclictest0-21swapper/022:44:580
27947996245,12cyclictest0-21swapper/322:39:473
2794699624,50cyclictest0-21swapper/200:04:582
2794699623,53cyclictest0-21swapper/223:29:572
2794699623,51cyclictest26909-21latency23:10:072
2794699623,51cyclictest26909-21latency23:10:072
2794699623,51cyclictest0-21swapper/222:15:012
2794699623,51cyclictest0-21swapper/221:15:052
2794699623,51cyclictest0-21swapper/220:49:502
2794199625,39cyclictest0-21swapper/020:42:260
219499620,5rtkit-daemon2193-21rtkit-daemon00:03:323
108032623,9sleep310869-21proc_pri21:10:183
2794699614,49cyclictest0-21swapper/222:55:092
2794699613,51cyclictest0-21swapper/223:05:082
2794199615,48cyclictest0-21swapper/021:33:330
2794199614,13cyclictest0-21swapper/023:05:060
274672613,12sleep30-21swapper/321:35:143
2794699607,45cyclictest0-21swapper/223:58:432
2794699605,48cyclictest0-21swapper/223:20:092
2794699604,49cyclictest0-21swapper/222:50:152
2794699603,51cyclictest0-21swapper/219:38:432
2794699603,50cyclictest0-21swapper/222:29:592
2794699603,50cyclictest0-21swapper/222:29:592
2794699603,50cyclictest0-21swapper/221:55:122
2794199607,10cyclictest10788-21ntp_offset21:10:170
2794199604,39cyclictest0-21swapper/022:58:100
2794199604,13cyclictest0-21swapper/023:00:060
2794199603,11cyclictest24591-21aten_r1power_en19:40:040
219499600,5rtkit-daemon2193-21rtkit-daemon23:21:563
219499600,5rtkit-daemon2193-21rtkit-daemon20:23:553
203822603,11sleep20-21swapper/223:00:112
27947995944,11cyclictest0-21swapper/321:00:003
27947995942,12cyclictest0-21swapper/322:45:103
2794699594,48cyclictest27661-21tr23:59:572
2794699593,48cyclictest20683-21diskmemload22:00:182
2794699593,48cyclictest0-21swapper/222:10:182
2794699593,13cyclictest0-21swapper/221:35:252
2794199594,48cyclictest0-21swapper/022:52:100
2794199594,13cyclictest21673-21sort22:15:040
2794199594,13cyclictest0-21swapper/022:00:160
27941995939,12cyclictest10825-21tr23:35:030
27941995920,22cyclictest0-21swapper/019:22:160
219499590,4rtkit-daemon2193-21rtkit-daemon20:13:483
2794699585,46cyclictest0-21swapper/223:35:042
2794699584,47cyclictest0-21swapper/222:26:172
2794699583,47cyclictest0-21swapper/220:25:272
27945995839,13cyclictest0-21swapper/120:51:501
2794199585,46cyclictest0-21swapper/022:38:090
2794199584,36cyclictest0-21swapper/021:26:340
2794199583,12cyclictest0-21swapper/000:00:070
27947995740,9cyclictest17947-21rm22:56:403
27947995725,11cyclictest0-21swapper/323:12:193
27947995725,11cyclictest0-21swapper/323:12:193
27947995724,27cyclictest23158-21sshd20:42:203
27947995714,25cyclictest0-21swapper/320:55:203
27947995712,10cyclictest17994-21fschecks_time23:45:003
2794699576,44cyclictest0-21swapper/221:46:062
2794699576,44cyclictest0-21swapper/221:46:062
2794699574,45cyclictest0-21swapper/221:25:052
2794699573,47cyclictest0-21swapper/222:04:592
2794599574,33cyclictest0-21swapper/119:50:301
2794199575,47cyclictest0-21swapper/021:02:040
27941995723,29cyclictest15-21rcuc/021:55:100
219499570,4rtkit-daemon2193-21rtkit-daemon23:25:263
206332574,13sleep00-21swapper/022:14:250
128082574,46sleep10-21swapper/122:00:281
54642564,12sleep20-21swapper/220:05:192
2794799565,32cyclictest0-21swapper/321:30:223
2794799565,30cyclictest25230-21ssh22:20:083
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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