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2025-11-27 - 07:23

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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 rack0slot8s.osadl.org (updated Thu Nov 27, 2025 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
275991910,81ptp4l0-21swapper/119:06:061
1239126655,9sleep110-21swapper/1119:05:483
1265926554,9sleep00-21swapper/019:09:390
1237426553,10sleep70-21swapper/719:05:339
1237226554,9sleep50-21swapper/519:05:317
942126452,9sleep100-21swapper/1019:05:112
1257026352,9sleep40-21swapper/419:08:196
228172610,0sleep50-21swapper/522:15:167
1246426150,9sleep60-21swapper/619:06:448
306122560,0sleep70-21swapper/723:50:169
299162550,0sleep40-21swapper/421:00:186
13029994133,8cyclictest0-21swapper/1023:30:212
1299699232,15cyclictest0-21swapper/422:05:006
1299699212,15cyclictest0-21swapper/421:40:016
1299699192,14cyclictest0-21swapper/422:50:016
1299699192,14cyclictest0-21swapper/422:50:006
1299699191,14cyclictest0-21swapper/422:00:016
1302199182,10cyclictest0-21swapper/920:50:0111
1297899183,8cyclictest0-21swapper/023:00:000
94980170,2rtkit-daemon0-21swapper/319:08:075
275991170,1ptp4l21-21ksoftirqd/123:10:141
1302199172,9cyclictest0-21swapper/923:55:0011
1300699170,10cyclictest0-21swapper/619:40:008
65842160,0sleep70-21swapper/723:20:009
275991160,1ptp4l21-21ksoftirqd/122:45:151
275991160,1ptp4l21-21ksoftirqd/122:45:151
275991160,1ptp4l21-21ksoftirqd/122:00:161
1301299163,9cyclictest14221-21kworker/u24:223:50:019
1300699163,8cyclictest0-21swapper/620:24:598
1299199163,8cyclictest0-21swapper/319:55:005
275991150,1ptp4l21-21ksoftirqd/119:40:251
275991150,0ptp4l0-21swapper/120:05:151
275991150,0ptp4l0-21swapper/100:15:231
275991150,0ptp4l0-21swapper/100:10:111
259182150,0sleep50-21swapper/521:35:237
1302199153,8cyclictest0-21swapper/919:15:0011
1301299152,9cyclictest0-21swapper/723:20:019
1301299152,8cyclictest0-21swapper/721:30:019
1300699152,8cyclictest0-21swapper/600:10:018
1300199153,8cyclictest0-21swapper/520:00:007
1300199152,9cyclictest0-21swapper/520:30:017
1299699152,8cyclictest0-21swapper/419:50:246
1299199152,9cyclictest0-21swapper/323:15:015
1299199152,8cyclictest0-21swapper/322:15:005
1298199153,8cyclictest0-21swapper/119:50:001
1298199152,8cyclictest0-21swapper/100:00:011
1297899152,8cyclictest0-21swapper/020:25:010
125072157,6sleep80-21swapper/819:07:2310
275991140,2ptp4l0-21swapper/122:13:121
275991140,0ptp4l0-21swapper/123:15:191
275991140,0ptp4l0-21swapper/121:20:131
275991140,0ptp4l0-21swapper/121:10:201
275991140,0ptp4l0-21swapper/120:50:131
275991140,0ptp4l0-21swapper/119:55:241
275991140,0ptp4l0-21swapper/119:30:161
1303499142,7cyclictest0-21swapper/1120:05:013
1303499141,9cyclictest0-21swapper/1123:15:013
1301299143,7cyclictest0-21swapper/722:15:019
1301299143,6cyclictest0-21swapper/723:30:019
1301299142,7cyclictest0-21swapper/700:20:009
1301299141,8cyclictest0-21swapper/700:30:019
1300699143,7cyclictest0-21swapper/622:45:258
1300699143,7cyclictest0-21swapper/622:45:248
1300699143,7cyclictest0-21swapper/622:35:008
1300699143,7cyclictest0-21swapper/622:35:008
1300699142,7cyclictest0-21swapper/621:30:238
1300699141,12cyclictest14221-21kworker/u24:221:50:018
1299199143,7cyclictest0-21swapper/300:10:005
1299199142,7cyclictest0-21swapper/323:30:245
1299199142,7cyclictest0-21swapper/321:00:015
1299199142,7cyclictest0-21swapper/319:20:265
1298199142,7cyclictest14221-21kworker/u24:223:25:011
1297899142,8cyclictest0-21swapper/022:25:010
1297899142,8cyclictest0-21swapper/022:25:000
1297899142,7cyclictest0-21swapper/022:55:000
1297899142,7cyclictest0-21swapper/021:15:010
301012130,0sleep40-21swapper/400:30:186
275991130,1ptp4l21-21ksoftirqd/123:42:101
275991130,1ptp4l21-21ksoftirqd/122:17:481
275991130,1ptp4l21-21ksoftirqd/100:21:491
275991130,1ptp4l11413-21awk22:40:221
275991130,0ptp4l0-21swapper/121:50:241
275991130,0ptp4l0-21swapper/120:41:331
275991130,0ptp4l0-21swapper/119:15:181
1301299132,7cyclictest0-21swapper/720:35:019
1301299130,8cyclictest0-21swapper/721:45:009
1300199133,6cyclictest0-21swapper/519:25:007
1299199135,4cyclictest31775-21sed19:30:195
1299199130,7cyclictest0-21swapper/321:15:435
1298199132,7cyclictest0-21swapper/122:35:011
1298199132,7cyclictest0-21swapper/122:35:001
1298199132,7cyclictest0-21swapper/120:05:001
1297899131,7cyclictest0-21swapper/020:55:010
275991120,1ptp4l21-21ksoftirqd/122:05:221
275991120,1ptp4l21-21ksoftirqd/121:00:011
275991120,1ptp4l21-21ksoftirqd/100:30:141
275991120,1ptp4l21-21ksoftirqd/100:05:121
275991120,0ptp4l0-21swapper/122:25:151
275991120,0ptp4l0-21swapper/122:25:141
275991120,0ptp4l0-21swapper/121:55:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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