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2026-04-17 - 23:57

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 Fri Apr 17, 2026 12:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
289392640,0sleep60-21swapper/608:25:166
1881916439,6phc2sys0-21swapper/407:05:224
33892610,1sleep665-21ksoftirqd/607:30:136
2312725544,6sleep70-21swapper/707:05:087
111391550,6ptp4l0-21swapper/007:08:540
2501725343,6sleep20-21swapper/207:09:452
2480125140,7sleep10-21swapper/107:07:021
2488824938,6sleep60-21swapper/607:08:116
2501124736,6sleep50-21swapper/507:09:405
2475024735,7sleep30-21swapper/307:06:243
315712450,0sleep30-21swapper/311:46:113
111391350,0ptp4l0-21swapper/408:00:004
111391300,4ptp4l0-21swapper/410:28:364
111391300,0ptp4l0-21swapper/712:29:457
111391300,0ptp4l0-21swapper/412:13:074
111391300,0ptp4l0-21swapper/411:56:314
111391300,0ptp4l0-21swapper/408:20:004
111391290,0ptp4l0-21swapper/508:25:195
111391290,0ptp4l0-21swapper/410:34:504
111391280,4ptp4l0-21swapper/412:15:534
111391280,2ptp4l0-21swapper/410:04:164
111391280,0ptp4l0-21swapper/412:23:214
111391280,0ptp4l0-21swapper/410:52:444
111391280,0ptp4l0-21swapper/410:20:124
111391280,0ptp4l0-21swapper/409:51:424
111391280,0ptp4l0-21swapper/311:07:083
111391280,0ptp4l0-21swapper/111:38:261
111391280,0ptp4l0-21swapper/011:26:260
111391270,3ptp4l0-21swapper/011:50:590
111391270,2ptp4l0-21swapper/511:03:305
111391270,2ptp4l0-21swapper/010:49:160
111391270,2ptp4l0-21swapper/010:49:160
111391270,1ptp4l0-21swapper/510:50:265
111391270,0ptp4l0-21swapper/712:39:277
111391270,0ptp4l0-21swapper/709:16:087
111391270,0ptp4l0-21swapper/409:14:074
111391270,0ptp4l0-21swapper/312:25:173
111391270,0ptp4l0-21swapper/012:37:360
111391270,0ptp4l0-21swapper/011:47:010
111391270,0ptp4l0-21swapper/009:34:510
111391260,3ptp4l721ktimersoftd/711:26:377
111391260,1ptp4l561ktimersoftd/509:30:055
111391260,0ptp4l0-21swapper/709:12:257
111391260,0ptp4l0-21swapper/511:37:455
111391260,0ptp4l0-21swapper/411:50:364
111391260,0ptp4l0-21swapper/411:48:314
111391260,0ptp4l0-21swapper/411:28:174
111391260,0ptp4l0-21swapper/411:16:534
111391260,0ptp4l0-21swapper/410:15:514
111391260,0ptp4l0-21swapper/409:28:264
111391260,0ptp4l0-21swapper/409:21:164
111391260,0ptp4l0-21swapper/310:00:113
111391260,0ptp4l0-21swapper/009:52:110
111391260,0ptp4l0-21swapper/008:15:190
111391250,0ptp4l0-21swapper/709:59:557
111391250,0ptp4l0-21swapper/412:08:494
111391250,0ptp4l0-21swapper/412:01:474
111391250,0ptp4l0-21swapper/410:41:264
111391250,0ptp4l0-21swapper/410:15:014
111391250,0ptp4l0-21swapper/409:58:444
111391250,0ptp4l0-21swapper/408:42:464
111391250,0ptp4l0-21swapper/407:30:104
111391250,0ptp4l0-21swapper/312:36:013
111391250,0ptp4l0-21swapper/211:26:302
111391250,0ptp4l0-21swapper/208:10:172
111391250,0ptp4l0-21swapper/208:10:162
111391250,0ptp4l0-21swapper/112:17:041
111391250,0ptp4l0-21swapper/109:55:191
111391250,0ptp4l0-21swapper/012:15:170
111391250,0ptp4l0-21swapper/011:30:130
111391250,0ptp4l0-21swapper/009:40:180
111391250,0ptp4l0-21swapper/007:40:110
111391250,0ptp4l0-21swapper/007:15:010
111391240,2ptp4l481ktimersoftd/412:37:134
111391240,2ptp4l0-21swapper/010:13:400
111391240,1ptp4l8370-21smart_sda08:50:150
111391240,1ptp4l5516-21hddtemp_smartct07:35:121
111391240,1ptp4l28859-21users10:10:191
111391240,1ptp4l25807-21fw_forwarded_lo07:10:130
111391240,1ptp4l23981-21df10:05:110
111391240,1ptp4l1736-21missed_timers11:50:161
111391240,1ptp4l12370-21diskstats07:50:111
111391240,0ptp4l0-21swapper/712:30:127
111391240,0ptp4l0-21swapper/707:15:177
111391240,0ptp4l0-21swapper/507:55:165
111391240,0ptp4l0-21swapper/507:35:115
111391240,0ptp4l0-21swapper/412:31:234
111391240,0ptp4l0-21swapper/411:41:104
111391240,0ptp4l0-21swapper/410:55:234
111391240,0ptp4l0-21swapper/410:47:204
111391240,0ptp4l0-21swapper/410:47:194
111391240,0ptp4l0-21swapper/410:05:474
111391240,0ptp4l0-21swapper/408:40:004
111391240,0ptp4l0-21swapper/407:40:194
111391240,0ptp4l0-21swapper/407:20:114
111391240,0ptp4l0-21swapper/311:59:513
111391240,0ptp4l0-21swapper/111:27:571
111391240,0ptp4l0-21swapper/012:10:130
111391240,0ptp4l0-21swapper/010:30:360
111391240,0ptp4l0-21swapper/010:21:550
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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