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2026-05-19 - 01:13

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 Mon May 18, 2026 12:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
111391680,5ptp4l0-21swapper/007:09:540
111391680,5ptp4l0-21swapper/007:09:530
111391620,5ptp4l0-21swapper/107:08:321
111391620,5ptp4l0-21swapper/107:08:321
2352026151,6sleep70-21swapper/707:06:517
2352026151,6sleep70-21swapper/707:06:507
1881916037,6phc2sys0-21swapper/407:05:074
1881916037,6phc2sys0-21swapper/407:05:064
111391560,5ptp4l0-21swapper/507:08:335
111391560,5ptp4l0-21swapper/507:08:335
2367925141,6sleep20-21swapper/207:08:542
2367925141,6sleep20-21swapper/207:08:532
111391490,2ptp4l0-21swapper/307:05:163
111391490,2ptp4l0-21swapper/307:05:163
142592460,0sleep70-21swapper/712:01:517
2362924535,6sleep60-21swapper/607:08:106
2362924535,6sleep60-21swapper/607:08:096
111391350,0ptp4l0-21swapper/011:10:180
111391340,0ptp4l0-21swapper/011:20:160
111391330,0ptp4l18504-21memory08:05:160
111391330,0ptp4l0-21swapper/310:06:393
111391330,0ptp4l0-21swapper/210:26:132
111391330,0ptp4l0-21swapper/009:28:590
111391320,0ptp4l0-21swapper/011:45:140
111391320,0ptp4l0-21swapper/009:41:560
111391320,0ptp4l0-21swapper/009:41:560
111391320,0ptp4l0-21swapper/009:10:530
111391310,0ptp4l0-21swapper/310:31:323
111391310,0ptp4l0-21swapper/012:35:350
111391310,0ptp4l0-21swapper/010:54:460
111391310,0ptp4l0-21swapper/010:28:250
111391300,1ptp4l17108-21ssh09:10:591
111391300,0ptp4l0-21swapper/409:26:044
111391300,0ptp4l0-21swapper/111:51:361
111391300,0ptp4l0-21swapper/009:36:590
111391300,0ptp4l0-21swapper/009:32:580
111391300,0ptp4l0-21swapper/009:15:120
111391300,0ptp4l0-21swapper/008:29:550
111391290,2ptp4l0-21swapper/010:43:170
111391290,0ptp4l0-21swapper/411:43:124
111391290,0ptp4l0-21swapper/312:37:563
111391290,0ptp4l0-21swapper/111:57:081
111391290,0ptp4l0-21swapper/111:38:461
111391290,0ptp4l0-21swapper/109:20:181
111391290,0ptp4l0-21swapper/010:49:100
111391290,0ptp4l0-21swapper/010:16:450
111391280,0ptp4l0-21swapper/012:11:560
111391280,0ptp4l0-21swapper/011:54:090
111391280,0ptp4l0-21swapper/009:52:380
111391270,0ptp4l0-21swapper/407:35:154
111391270,0ptp4l0-21swapper/110:16:291
111391270,0ptp4l0-21swapper/012:06:090
111391270,0ptp4l0-21swapper/011:15:020
111391270,0ptp4l0-21swapper/009:24:210
111391260,5ptp4l24723-21kworker/0:211:27:550
111391260,0ptp4l0-21swapper/411:35:354
111391260,0ptp4l0-21swapper/411:30:374
111391260,0ptp4l0-21swapper/411:15:114
111391260,0ptp4l0-21swapper/411:12:574
111391260,0ptp4l0-21swapper/410:21:134
111391260,0ptp4l0-21swapper/409:46:064
111391260,0ptp4l0-21swapper/408:00:144
111391260,0ptp4l0-21swapper/010:04:060
111391260,0ptp4l0-21swapper/009:57:490
111391260,0ptp4l0-21swapper/009:09:260
111391250,3ptp4l0-21swapper/009:01:400
111391250,2ptp4l0-21swapper/109:27:251
111391250,1ptp4l27174-21df12:20:155
111391250,1ptp4l27174-21df12:20:145
111391250,1ptp4l17289-21cat09:55:146
111391250,1ptp4l15722-21hddtemp_smartct08:00:130
111391250,0ptp4l0-21swapper/607:45:146
111391250,0ptp4l0-21swapper/411:50:344
111391250,0ptp4l0-21swapper/410:39:494
111391250,0ptp4l0-21swapper/409:41:174
111391250,0ptp4l0-21swapper/409:41:164
111391250,0ptp4l0-21swapper/409:10:424
111391250,0ptp4l0-21swapper/407:15:124
111391250,0ptp4l0-21swapper/112:30:151
111391250,0ptp4l0-21swapper/110:52:551
111391250,0ptp4l0-21swapper/012:33:080
111391250,0ptp4l0-21swapper/012:15:080
111391250,0ptp4l0-21swapper/010:20:310
111391250,0ptp4l0-21swapper/009:47:210
111391250,0ptp4l0-21swapper/008:30:160
111391240,1ptp4l32361-21irqstats07:25:164
111391240,1ptp4l20885-21diskstats10:00:124
111391240,1ptp4l15170-21latency_hist09:10:004
111391240,0ptp4l0-21swapper/707:50:177
111391240,0ptp4l0-21swapper/609:25:406
111391240,0ptp4l0-21swapper/608:50:106
111391240,0ptp4l0-21swapper/412:11:584
111391240,0ptp4l0-21swapper/412:03:254
111391240,0ptp4l0-21swapper/411:25:004
111391240,0ptp4l0-21swapper/411:21:154
111391240,0ptp4l0-21swapper/411:05:144
111391240,0ptp4l0-21swapper/410:25:124
111391240,0ptp4l0-21swapper/410:15:114
111391240,0ptp4l0-21swapper/409:35:174
111391240,0ptp4l0-21swapper/408:25:154
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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