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2026-06-10 - 15:23

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #6

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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  Intel
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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack1slot6s.osadl.org (updated Wed Jun 10, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
690421180,4sleep26906-21sa112:18:022
797499966,69cyclictest0-21swapper/111:51:181
797499966,69cyclictest0-21swapper/111:51:181
7976999543,12cyclictest29740-21needreboot09:38:333
797499955,13cyclictest0-21swapper/110:58:321
797499954,14cyclictest0-21swapper/110:36:521
797499944,16cyclictest28381-21unixbench_singl10:23:411
797499935,69cyclictest0-21swapper/110:03:371
797499924,13cyclictest0-21swapper/112:27:541
7974999221,49cyclictest20107-21unixbench_singl09:23:421
7974999219,66cyclictest4017-21latency_hist09:03:101
797499914,66cyclictest0-21swapper/111:58:281
797499914,14cyclictest0-21swapper/110:22:091
797499914,13cyclictest0-21swapper/112:08:301
797499914,13cyclictest0-21swapper/111:37:431
7974999127,54cyclictest0-21swapper/111:29:481
7974999115,7cyclictest107550irq/46-eth011:38:231
797499909,9cyclictest0-21swapper/109:33:311
797499905,65cyclictest0-21swapper/110:41:571
797499905,65cyclictest0-21swapper/109:03:251
797499904,68cyclictest0-21swapper/111:21:481
797499904,15cyclictest0-21swapper/109:58:221
7974999020,52cyclictest0-21swapper/110:50:131
114712900,7sleep211470-21gltestperf12:23:222
7975998921,59cyclictest0-21swapper/209:20:392
797499895,14cyclictest0-21swapper/109:28:301
797499894,65cyclictest0-21swapper/108:28:411
797499894,13cyclictest0-21swapper/108:49:111
797499894,11cyclictest9078-21yum12:18:401
7974998917,10cyclictest2610-21cpuspeed11:23:181
797499885,13cyclictest0-21swapper/109:43:191
797499884,74cyclictest24365-21runrttasks07:29:251
797499884,12cyclictest0-21swapper/107:58:401
7975998728,38cyclictest1547-21nscd11:32:382
797499874,67cyclictest0-21swapper/109:50:281
797499874,23cyclictest0-21swapper/111:53:271
797499874,14cyclictest0-21swapper/110:17:321
797499869,56cyclictest0-21swapper/111:14:331
797499869,56cyclictest0-21swapper/111:14:331
797499864,66cyclictest0-21swapper/112:06:571
7974998631,47cyclictest0-21swapper/109:18:421
797499863,74cyclictest24533-21gltestperf08:38:291
7974998615,8cyclictest107550irq/46-eth010:12:131
797499854,73cyclictest0-21swapper/109:53:441
797499854,63cyclictest0-21swapper/110:45:281
797499854,61cyclictest0-21swapper/109:16:581
797499854,59cyclictest0-21swapper/110:57:531
797499854,22cyclictest0-21swapper/111:04:161
797499854,21cyclictest0-21swapper/110:28:271
7974998514,12cyclictest0-21swapper/109:10:441
7974998514,12cyclictest0-21swapper/109:10:441
7975998432,43cyclictest4131-21grep11:23:382
797499845,56cyclictest0-21swapper/111:12:281
797499845,15cyclictest0-21swapper/111:47:251
797499845,14cyclictest0-21swapper/108:18:381
797499844,70cyclictest0-21swapper/112:13:331
7975998325,52cyclictest30915-21ssh10:28:282
7974998316,10cyclictest0-21swapper/109:38:471
7974998313,11cyclictest0-21swapper/108:17:071
7975998232,33cyclictest22052-21cpuspeed_turbos09:28:222
7975998222,35cyclictest8808-21sed12:18:362
797499825,67cyclictest0-21swapper/107:03:321
797499824,70cyclictest0-21swapper/107:13:351
797499824,13cyclictest0-21swapper/108:43:421
7974998228,47cyclictest2531-21cpuspeed_turbos07:53:271
7974998224,49cyclictest27608-21tr07:38:261
7974998216,46cyclictest0-21swapper/108:53:311
7974998212,10cyclictest107550irq/46-eth007:08:331
797499814,16cyclictest0-21swapper/108:03:331
7975998022,42cyclictest0-21swapper/211:33:302
797499804,67cyclictest0-21swapper/108:23:241
797499804,67cyclictest0-21swapper/108:23:241
7974998033,39cyclictest18936-21needreboot07:18:381
7974998026,46cyclictest9530-21proc_pri06:58:421
7974998026,46cyclictest9530-21proc_pri06:58:421
7974998026,44cyclictest11091-21unixbench_singl08:08:461
7975997932,26cyclictest23016-21head08:33:462
7975997927,34cyclictest0-21swapper/212:03:352
7975997922,49cyclictest0-21swapper/210:51:202
7975997920,51cyclictest0-21swapper/210:56:242
797499798,60cyclictest0-21swapper/106:58:161
797499794,12cyclictest29728-21aten2.4-expect07:43:241
797499794,12cyclictest29728-21aten2.4-expect07:43:241
7973997919,52cyclictest5773-21ps10:38:350
7973997913,58cyclictest0-21swapper/010:08:180
7975997832,13cyclictest18741-21sed10:58:242
7975997831,39cyclictest341-21ssh11:18:362
7975997821,37cyclictest0-21swapper/211:38:152
797499783,20cyclictest20122-21munin-node07:23:341
7975997729,40cyclictest1124-21snmpd11:58:382
7975997729,32cyclictest4182-21grep09:48:332
7975997725,33cyclictest0-21swapper/210:33:292
7975997723,46cyclictest0-21swapper/210:46:572
7975997722,47cyclictest0-21swapper/209:37:082
7975997721,50cyclictest0-21swapper/209:03:242
7975997720,50cyclictest0-21swapper/211:03:192
7975997717,34cyclictest0-21swapper/209:23:482
797499774,56cyclictest0-21swapper/108:33:241
7974997729,41cyclictest32424-21tr07:48:271
7973997718,51cyclictest30490-21grep07:43:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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