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2026-07-18 - 09:45

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

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 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 rackcslot7s.osadl.org (updated Sat Jul 18, 2026 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
164015821330,3sleep00-21swapper/019:30:210
171375721190,3sleep33056-21PK-Backend23:00:123
170336421100,4sleep23056-21PK-Backend22:30:122
170692421050,2sleep00-21swapper/022:40:120
168734721000,4sleep33056-21PK-Backend21:45:143
139099930,60rtkit-daemon0-21swapper/219:08:522
162987828047,23sleep00-21swapper/019:05:110
163030826443,13sleep30-21swapper/319:05:193
163125926344,13sleep10-21swapper/119:08:501
16446322460,2sleep00-21swapper/019:45:130
16912452380,4sleep00-21swapper/021:55:170
16890162300,3sleep20-21swapper/221:50:142
1631491992814,12cyclictest1663688-21unin-run20:40:002
1631485992816,9cyclictest1715000-21unin-run23:05:000
1631487992613,11cyclictest1683238-21dump-pmu-power21:35:011
1631495992419,3cyclictest436-20systemd-journal19:34:563
163149599241,18cyclictest0-21swapper/319:35:113
1631485992420,3cyclictest1095-21runrttasks20:18:380
1631485992416,6cyclictest1672306-21cron21:05:000
1631485992416,6cyclictest1641705-21python319:35:190
1631495992321,1cyclictest0-21swapper/323:24:143
1631491992320,2cyclictest0-21swapper/200:09:542
163148799234,4cyclictest26-21ksoftirqd/121:50:001
163148799233,17cyclictest436-20systemd-journal22:59:591
1631487992316,3cyclictest26-21ksoftirqd/120:30:001
1631487992314,7cyclictest1648528-21ntp_states19:55:211
1631487992313,8cyclictest1676075-21unin-run21:15:001
1631487992311,10cyclictest26-21ksoftirqd/120:15:001
1631485992321,1cyclictest0-21swapper/022:36:280
1631485992321,1cyclictest0-21swapper/022:21:260
139099230,16rtkit-daemon3056-21PK-Backend20:17:493
139099230,15rtkit-daemon3056-21PK-Backend21:20:132
139099230,15rtkit-daemon3056-21PK-Backend19:53:343
16781802220,7sleep342-21ksoftirqd/321:20:113
1631495992220,1cyclictest0-21swapper/323:15:353
1631495992220,1cyclictest0-21swapper/300:39:313
1631495992219,2cyclictest3056-21PK-Backend20:30:153
163149599220,20cyclictest3056-21PK-Backend21:43:163
163149599220,20cyclictest0-21swapper/323:40:573
1631491992220,1cyclictest0-21swapper/223:47:512
1631491992220,1cyclictest0-21swapper/222:55:522
1631491992220,1cyclictest0-21swapper/221:38:262
1631491992220,1cyclictest0-21swapper/220:21:332
1631491992220,1cyclictest0-21swapper/220:10:452
1631491992219,2cyclictest0-21swapper/219:26:382
1631491992216,4cyclictest1718419-21cron23:15:002
1631491992216,4cyclictest1718419-21cron23:15:002
163149199220,21cyclictest0-21swapper/222:47:072
1631487992220,1cyclictest0-21swapper/123:03:521
1631487992219,2cyclictest3056-21PK-Backend20:35:011
163148599220,21cyclictest0-21swapper/022:50:260
163148599220,21cyclictest0-21swapper/022:07:130
163148599220,21cyclictest0-21swapper/021:53:480
139099220,7rtkit-daemon0-21swapper/222:16:392
139099220,15rtkit-daemon3056-21PK-Backend21:39:093
1631495992119,1cyclictest3056-21PK-Backend19:24:243
1631495992119,1cyclictest0-21swapper/321:34:303
1631495992119,1cyclictest0-21swapper/300:16:333
1631495992118,2cyclictest3056-21PK-Backend23:07:113
1631495992118,2cyclictest3056-21PK-Backend21:04:223
1631495992118,2cyclictest3056-21PK-Backend20:02:113
1631495992113,6cyclictest436-20systemd-journal23:14:553
1631495992113,6cyclictest436-20systemd-journal23:14:553
163149599210,20cyclictest0-21swapper/323:48:143
163149599210,20cyclictest0-21swapper/323:26:243
163149599210,19cyclictest3056-21PK-Backend19:47:023
1631491992119,1cyclictest0-21swapper/223:53:452
1631491992119,1cyclictest0-21swapper/223:36:482
1631491992119,1cyclictest0-21swapper/223:19:182
1631491992119,1cyclictest0-21swapper/222:11:112
1631491992119,1cyclictest0-21swapper/222:11:112
1631491992119,1cyclictest0-21swapper/222:08:412
1631491992119,1cyclictest0-21swapper/221:08:382
1631491992119,1cyclictest0-21swapper/221:03:172
1631491992119,1cyclictest0-21swapper/220:31:272
1631491992119,1cyclictest0-21swapper/220:26:472
1631491992119,1cyclictest0-21swapper/219:50:442
1631491992119,1cyclictest0-21swapper/219:44:222
163149199210,20cyclictest0-21swapper/223:56:422
163149199210,20cyclictest0-21swapper/222:44:232
163149199210,20cyclictest0-21swapper/200:38:132
163149199210,20cyclictest0-21swapper/200:26:302
163149199210,20cyclictest0-21swapper/200:23:192
1631487992119,1cyclictest0-21swapper/122:42:561
1631487992119,1cyclictest0-21swapper/121:50:511
1631487992119,1cyclictest0-21swapper/121:42:401
1631487992119,1cyclictest0-21swapper/119:47:291
1631487992119,1cyclictest0-21swapper/119:39:581
1631487992119,1cyclictest0-21swapper/119:18:231
1631487992119,1cyclictest0-21swapper/119:18:231
1631487992119,1cyclictest0-21swapper/100:09:561
1631487992115,4cyclictest26-21ksoftirqd/122:30:011
1631487992113,6cyclictest1736097-21fwupdmgr00:02:301
163148799210,20cyclictest0-21swapper/123:38:531
163148799210,20cyclictest0-21swapper/100:19:291
163148799210,19cyclictest3056-21PK-Backend23:31:161
1631485992119,1cyclictest0-21swapper/000:05:290
163148599210,20cyclictest0-21swapper/021:44:150
163148599210,20cyclictest0-21swapper/021:27:180
163148599210,20cyclictest0-21swapper/020:54:400
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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