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2025-11-20 - 06:29

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 20, 2025 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2759911040,94ptp4l0-21swapper/119:06:471
94980940,89rtkit-daemon0-21swapper/019:07:080
78326856,10sleep50-21swapper/519:06:157
106326654,10sleep70-21swapper/719:09:429
101226655,9sleep110-21swapper/1119:08:593
3019126354,7sleep40-21swapper/419:05:146
166952630,0sleep100-21swapper/1023:30:142
82926150,9sleep60-21swapper/619:06:528
54182610,0sleep10-21swapper/121:10:011
127912590,0sleep50-21swapper/522:40:277
152182580,1sleep11801rcuc/1119:57:263
65912570,0sleep40-21swapper/423:15:176
244492560,0sleep90-21swapper/922:15:1611
99525544,9sleep100-21swapper/1019:08:462
147499243,7cyclictest0-21swapper/422:34:596
145899246,11cyclictest0-21swapper/122:20:011
146499233,12cyclictest0-21swapper/223:04:594
147499202,13cyclictest0-21swapper/422:00:006
146999192,10cyclictest0-21swapper/322:10:015
146499193,10cyclictest0-21swapper/221:20:004
275991180,1ptp4l0-21swapper/120:50:171
206642180,0sleep60-21swapper/622:10:128
149299183,9cyclictest0-21swapper/820:45:0010
146999184,8cyclictest0-21swapper/320:30:005
146499183,8cyclictest0-21swapper/222:50:004
146499183,10cyclictest0-21swapper/222:40:274
146499183,10cyclictest0-21swapper/220:35:004
145899180,16cyclictest0-21swapper/120:00:191
8312177,8sleep80-21swapper/819:06:5410
275991170,0ptp4l0-21swapper/120:40:161
146499174,8cyclictest0-21swapper/220:05:014
52372160,2sleep1181-21ksoftirqd/1123:15:133
275991160,1ptp4l21-21ksoftirqd/121:45:131
275991160,1ptp4l21-21ksoftirqd/121:10:261
275991160,1ptp4l21-21ksoftirqd/119:50:011
275991160,0ptp4l0-21swapper/122:50:181
275991160,0ptp4l0-21swapper/120:15:261
231242160,0sleep80-21swapper/820:05:2510
150299161,3cyclictest0-21swapper/1020:05:172
149699162,8cyclictest0-21swapper/920:45:0011
149699161,14cyclictest0-21swapper/923:30:1711
146999163,7cyclictest0-21swapper/321:30:015
146999162,2cyclictest0-21swapper/320:15:195
146499163,9cyclictest0-21swapper/223:49:594
146499163,9cyclictest0-21swapper/223:10:014
146499163,9cyclictest0-21swapper/222:15:014
146499163,8cyclictest0-21swapper/220:05:244
145899162,9cyclictest0-21swapper/122:35:001
275991150,1ptp4l27551-21hddtemp_smartct20:55:131
275991150,0ptp4l0-21swapper/121:19:381
150699150,14cyclictest0-21swapper/1100:15:153
149699153,7cyclictest0-21swapper/923:29:5911
149699153,7cyclictest0-21swapper/923:25:0011
149699153,7cyclictest0-21swapper/921:30:0111
149699152,9cyclictest18356-21kworker/u24:020:10:0111
149699152,8cyclictest18356-21kworker/u24:020:10:0011
149699152,7cyclictest0-21swapper/920:50:0111
149299153,8cyclictest0-21swapper/823:45:2810
149299153,7cyclictest0-21swapper/819:25:0110
149299153,7cyclictest0-21swapper/819:25:0110
1487991510,4cyclictest0-21swapper/720:45:009
146499154,7cyclictest0-21swapper/221:25:014
146499153,8cyclictest0-21swapper/222:20:004
145899153,8cyclictest0-21swapper/120:35:011
275991140,0ptp4l0-21swapper/122:45:181
150699140,2cyclictest5924-21latency_hist22:35:003
149699143,7cyclictest0-21swapper/921:05:2511
149699142,7cyclictest0-21swapper/922:45:2311
149299143,7cyclictest0-21swapper/800:20:0110
149299142,7cyclictest0-21swapper/819:35:0110
149299142,7cyclictest0-21swapper/819:35:0010
149299140,8cyclictest0-21swapper/800:05:0110
147499143,7cyclictest0-21swapper/420:20:016
147499142,7cyclictest0-21swapper/423:55:236
146999143,7cyclictest0-21swapper/322:54:595
146999143,7cyclictest0-21swapper/300:30:015
146499142,7cyclictest0-21swapper/219:10:014
275991130,1ptp4l21-21ksoftirqd/123:15:201
275991130,1ptp4l21-21ksoftirqd/122:19:101
275991130,0ptp4l0-21swapper/123:30:241
275991130,0ptp4l0-21swapper/122:10:171
275991130,0ptp4l0-21swapper/120:45:151
149299132,7cyclictest0-21swapper/821:25:2610
148799132,6cyclictest0-21swapper/700:40:009
148799130,8cyclictest0-21swapper/722:14:089
147899132,5cyclictest0-21swapper/519:15:017
147899132,5cyclictest0-21swapper/519:15:007
146999133,6cyclictest0-21swapper/322:10:205
146999132,6cyclictest0-21swapper/321:20:005
146999130,2cyclictest0-21swapper/320:50:195
146499130,9cyclictest0-21swapper/220:35:234
145899132,7cyclictest0-21swapper/123:15:001
145899132,7cyclictest0-21swapper/121:35:231
145899131,7cyclictest0-21swapper/121:40:221
1453991310,2cyclictest28878-21turbostat23:05:000
275991120,4ptp4l21-21ksoftirqd/100:35:161
275991120,1ptp4l21-21ksoftirqd/120:29:221
275991120,1ptp4l21-21ksoftirqd/100:25:251
275991120,0ptp4l0-21swapper/122:40:181
275991120,0ptp4l0-21swapper/120:22:181
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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