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2026-03-11 - 03:05

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 Mar 11, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
209719910510,27cyclictest19311-21cpuspeed_turbos23:07:310
209729910112,13cyclictest0-21swapper/121:02:521
209729910112,13cyclictest0-21swapper/121:02:521
209719910028,12cyclictest0-21swapper/020:37:460
1705521000,9sleep12097299cyclictest23:02:461
1705521000,9sleep12097299cyclictest23:02:461
20971999716,18cyclictest0-21swapper/021:01:050
2097299934,20cyclictest0-21swapper/117:47:301
2097199938,29cyclictest0-21swapper/018:12:410
2097299913,24cyclictest0-21swapper/119:49:081
2097199914,28cyclictest0-21swapper/021:07:220
2097199914,28cyclictest0-21swapper/021:07:220
2097299894,24cyclictest4902-21tune2fs21:57:371
2097299893,67cyclictest0-21swapper/121:17:221
20971998922,30cyclictest0-21swapper/019:50:570
20972998821,8cyclictest1287-21snmpd22:44:451
2097299873,77cyclictest0-21swapper/120:03:191
2097299853,74cyclictest3177-21cpuspeed_turbos21:07:351
20972998518,8cyclictest13494-21diskmemload22:11:101
2097299847,13cyclictest0-21swapper/121:46:541
2097299847,13cyclictest0-21swapper/121:46:541
2097299844,71cyclictest2817-21gltestperf20:17:431
2097299844,13cyclictest0-21swapper/122:48:191
20972998423,54cyclictest14478-21unixbench_multi18:38:011
20972998422,55cyclictest11247-21gltestperf18:32:471
2097299835,23cyclictest0-21swapper/123:00:411
2097299834,13cyclictest0-21swapper/120:42:421
2097299833,7cyclictest121850irq/46-eth020:40:371
2097299833,23cyclictest0-21swapper/120:07:591
20972998322,7cyclictest13678-21rm20:33:431
20972998319,42cyclictest0-21swapper/118:12:521
20972998317,8cyclictest1287-21snmpd21:56:371
20972998317,50cyclictest0-21swapper/122:37:341
20972998312,11cyclictest0-21swapper/122:30:411
2097299829,18cyclictest0-21swapper/123:12:461
2097299824,71cyclictest31599-21sed21:47:541
2097299824,24cyclictest0-21swapper/122:23:381
2097299824,24cyclictest0-21swapper/122:23:381
2097299824,24cyclictest0-21swapper/120:50:261
2097299824,21cyclictest18233-21diskstats22:17:351
2097299824,19cyclictest0-21swapper/118:49:551
2097299824,11cyclictest0-21swapper/121:19:171
2097299823,72cyclictest0-21swapper/122:55:291
2097299823,72cyclictest0-21swapper/122:12:311
2097299823,23cyclictest15347-21nscd23:07:351
20972998222,54cyclictest8438-21gltestperf22:02:391
20972998212,12cyclictest0-21swapper/122:32:321
2097299814,24cyclictest0-21swapper/121:40:531
2097299813,70cyclictest0-21swapper/121:34:401
2097299813,57cyclictest0-21swapper/120:22:521
20972998126,49cyclictest2631-21gltestperf19:22:451
20972998116,12cyclictest0-21swapper/120:12:451
2097299804,69cyclictest0-21swapper/121:22:401
2097299804,15cyclictest0-21swapper/118:24:281
2097299804,14cyclictest0-21swapper/120:27:341
20972998025,48cyclictest16236-21rm21:27:231
20972998023,50cyclictest8326-21cpuspeed_turbos18:27:421
20972998023,50cyclictest25352-21munin-node20:52:371
2097299794,67cyclictest25729-21munin-run17:57:291
2097299793,69cyclictest0-21swapper/120:57:481
20972997915,56cyclictest0-21swapper/118:12:291
2097299788,12cyclictest0-21swapper/119:54:381
2097299784,66cyclictest0-21swapper/120:02:101
2097299783,19cyclictest1419-21runrttasks18:06:581
20972997823,48cyclictest1419-21runrttasks19:18:071
2097299774,65cyclictest0-21swapper/118:17:501
2097299774,65cyclictest0-21swapper/118:17:501
2097299772,69cyclictest22391-21grep17:47:551
20972997713,12cyclictest0-21swapper/117:58:031
2097299763,67cyclictest0-21swapper/119:12:391
20972997624,46cyclictest28084-21if_err_eth019:07:481
20972997620,8cyclictest20570-21fschecks_count18:52:461
20972997613,12cyclictest0-21swapper/119:02:441
248599750,6rtkit-daemon2484-21rtkit-daemon18:29:563
2097299753,65cyclictest0-21swapper/119:37:481
20972997521,47cyclictest0-21swapper/119:42:361
20972997521,47cyclictest0-21swapper/119:42:361
20972997322,45cyclictest1419-21runrttasks18:57:321
20972997322,45cyclictest1419-21runrttasks18:57:321
2097299724,13cyclictest0-21swapper/119:32:361
20972997220,8cyclictest4805-21sshd19:27:441
20972997121,9cyclictest15247-21aten_r1power_fr18:42:391
248599700,5rtkit-daemon2484-21rtkit-daemon22:36:392
248342693,58sleep30-21swapper/323:15:153
61602677,53sleep00-21swapper/021:58:170
2097499655,53cyclictest0-21swapper/320:32:473
20974996519,25cyclictest0-21swapper/323:12:183
190792655,16sleep319230-21sed17:42:443
2097499644,53cyclictest0-21swapper/322:32:533
20973996433,14cyclictest0-21swapper/222:37:412
20973996423,22cyclictest1419-21runrttasks19:04:002
2097499635,51cyclictest9779-21grep19:37:433
2097499635,50cyclictest0-21swapper/322:37:313
2097499634,52cyclictest0-21swapper/320:12:403
2097499633,53cyclictest8173-21sh20:27:233
2097499633,52cyclictest30097-21fschecks_count19:12:443
20973996349,8cyclictest32650-21grep20:13:042
20971996330,12cyclictest0-21swapper/021:57:210
126412633,52sleep30-21swapper/322:57:333
109932630,14sleep02097199cyclictest18:32:440
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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