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2025-09-13 - 22:11

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 Sat Sep 13, 2025 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
275991880,78ptp4l0-21swapper/107:08:191
3267026857,9sleep00-21swapper/007:07:440
3265326756,9sleep110-21swapper/1107:07:313
34326653,11sleep50-21swapper/507:09:497
3271626554,9sleep70-21swapper/707:08:279
3257226553,10sleep100-21swapper/1007:06:182
3274126453,9sleep40-21swapper/407:08:476
3264826351,10sleep60-21swapper/607:07:268
288482630,0sleep50-21swapper/509:05:257
194182600,0sleep110-21swapper/1108:55:183
147412560,0sleep110-21swapper/1108:05:243
76999550,18cyclictest0-21swapper/1012:25:222
46002540,0sleep10-21swapper/107:55:011
76999450,1cyclictest0-21swapper/1011:00:282
76999220,1cyclictest0-21swapper/1010:30:262
769992019,1cyclictest0-21swapper/1010:55:272
74699192,12cyclictest28756-21kworker/u24:012:40:017
74199192,7cyclictest0-21swapper/410:40:006
74699182,10cyclictest0-21swapper/509:05:007
275991180,0ptp4l0-21swapper/111:25:241
263522180,0sleep90-21swapper/908:20:2311
74699170,15cyclictest0-21swapper/509:40:207
275991170,0ptp4l0-21swapper/112:35:251
75999163,8cyclictest0-21swapper/810:50:0010
275991160,0ptp4l0-21swapper/108:05:231
275991160,0ptp4l0-21swapper/107:30:151
275991160,0ptp4l0-21swapper/107:10:221
75599153,7cyclictest0-21swapper/708:40:009
74699153,7cyclictest0-21swapper/509:30:007
73299153,9cyclictest0-21swapper/210:15:004
73299153,8cyclictest0-21swapper/212:20:014
73299153,7cyclictest0-21swapper/211:25:004
73299151,10cyclictest0-21swapper/209:05:004
73299150,9cyclictest0-21swapper/210:04:594
72399152,8cyclictest0-21swapper/011:55:010
72399152,8cyclictest0-21swapper/011:55:010
72399151,6cyclictest0-21swapper/011:05:010
275991150,1ptp4l21-21ksoftirqd/112:10:171
275991150,0ptp4l0-21swapper/109:25:291
77499142,8cyclictest0-21swapper/1107:50:013
73299143,7cyclictest0-21swapper/207:45:264
73299142,8cyclictest0-21swapper/210:40:244
73299142,8cyclictest0-21swapper/210:30:014
72899143,9cyclictest0-21swapper/108:15:001
72399143,6cyclictest0-21swapper/012:10:010
72399143,6cyclictest0-21swapper/012:10:000
77499132,7cyclictest0-21swapper/1110:04:593
77499130,7cyclictest0-21swapper/1110:19:553
76599130,12cyclictest26473-21cut10:29:5911
74699132,7cyclictest0-21swapper/508:05:007
74699132,6cyclictest0-21swapper/511:10:017
74199132,8cyclictest0-21swapper/411:50:256
74199132,8cyclictest0-21swapper/411:50:246
74199132,7cyclictest0-21swapper/411:25:266
73299132,9cyclictest0-21swapper/211:30:014
73299130,12cyclictest0-21swapper/209:15:004
72899132,8cyclictest0-21swapper/111:00:011
72899132,8cyclictest0-21swapper/109:45:001
72899132,7cyclictest0-21swapper/108:55:271
275991130,0ptp4l0-21swapper/111:30:241
275991130,0ptp4l0-21swapper/110:05:161
275991130,0ptp4l0-21swapper/109:38:261
275991130,0ptp4l0-21swapper/108:25:261
275991130,0ptp4l0-21swapper/107:35:141
243482130,0sleep121-21ksoftirqd/112:30:201
77499122,6cyclictest0-21swapper/1110:45:003
77499120,11cyclictest0-21swapper/1111:45:003
77499120,11cyclictest0-21swapper/1111:44:593
769991211,1cyclictest741rcuc/1011:55:142
769991211,1cyclictest741rcuc/1011:55:132
75999122,6cyclictest0-21swapper/807:40:2510
75999120,11cyclictest0-21swapper/812:10:2010
75599122,6cyclictest0-21swapper/709:15:009
74199122,6cyclictest0-21swapper/409:05:166
72899123,8cyclictest0-21swapper/109:25:001
72899122,7cyclictest0-21swapper/110:35:011
72899122,7cyclictest0-21swapper/108:04:591
72899122,7cyclictest0-21swapper/108:00:001
72399123,5cyclictest0-21swapper/012:25:010
275991120,0ptp4l0-21swapper/112:05:261
275991120,0ptp4l0-21swapper/112:05:251
275991120,0ptp4l0-21swapper/111:54:051
275991120,0ptp4l0-21swapper/111:54:051
275991120,0ptp4l0-21swapper/111:42:041
275991120,0ptp4l0-21swapper/111:42:041
275991120,0ptp4l0-21swapper/111:16:371
275991120,0ptp4l0-21swapper/110:20:171
275991120,0ptp4l0-21swapper/109:05:191
275991120,0ptp4l0-21swapper/109:02:341
275991120,0ptp4l0-21swapper/108:22:531
191591120,0getstats0-21swapper/208:35:164
769991110,1cyclictest741rcuc/1007:50:142
76599110,3cyclictest6741-21hddtemp_smartct09:20:1711
75999117,4cyclictest0-21swapper/810:25:1510
75999110,7cyclictest0-21swapper/808:10:3710
75999110,6cyclictest0-21swapper/809:14:5510
75999110,1cyclictest0-21swapper/810:21:2310
75599112,6cyclictest0-21swapper/710:10:009
75099113,7cyclictest0-21swapper/609:45:288
74699112,6cyclictest0-21swapper/508:50:007
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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