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2026-08-26 - 18:20

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 Aug 26, 2026 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
13510999519,12cyclictest0-21swapper/108:26:051
13510999318,12cyclictest0-21swapper/107:45:581
1351299924,69cyclictest20611-21perl08:06:053
1351299924,68cyclictest0-21swapper/309:11:033
1351299923,67cyclictest26240-21unixbench_multi09:51:173
13510999220,8cyclictest17782-21sed08:51:001
1351299914,79cyclictest0-21swapper/308:57:093
1351299914,73cyclictest0-21swapper/308:19:443
1351299904,69cyclictest0-21swapper/310:16:123
1351299894,69cyclictest0-21swapper/310:29:323
1351299894,64cyclictest11858-21diskstats09:30:593
1351299884,76cyclictest0-21swapper/308:32:313
1351299884,65cyclictest0-21swapper/310:31:123
1351299883,48cyclictest0-21swapper/308:24:283
1351299875,59cyclictest2410-21ssh10:05:553
1351299875,59cyclictest2410-21ssh10:05:553
1351299874,65cyclictest0-21swapper/308:45:583
1351299874,64cyclictest0-21swapper/309:49:293
1351299873,76cyclictest9915-21cpuspeed07:51:003
1351299873,76cyclictest14134-21irqstats07:56:113
1351299864,74cyclictest1124-21snmpd08:27:453
1351299864,74cyclictest0-21swapper/308:51:023
1351299864,64cyclictest0-21swapper/311:01:533
1351299854,74cyclictest0-21swapper/309:45:143
1351299854,62cyclictest0-21swapper/309:40:443
1351299853,74cyclictest27812-21crond06:15:513
1351099855,27cyclictest0-21swapper/107:56:211
1351099854,73cyclictest0-21swapper/111:05:501
1351299844,72cyclictest15101-21ssh11:14:033
1351299844,71cyclictest0-21swapper/310:55:473
1351099844,73cyclictest0-21swapper/108:01:161
1351099844,73cyclictest0-21swapper/108:01:161
1351099844,30cyclictest0-21swapper/110:27:411
1351099844,27cyclictest0-21swapper/110:19:161
1351099844,12cyclictest0-21swapper/108:11:581
1351299837,58cyclictest0-21swapper/308:11:083
1351299835,71cyclictest0-21swapper/310:21:423
1351299835,62cyclictest0-21swapper/310:40:553
1351299834,71cyclictest2436-21iostat_ios09:16:043
1351299834,61cyclictest0-21swapper/310:13:123
1351299834,56cyclictest0-21swapper/308:45:443
1351299834,56cyclictest0-21swapper/308:45:443
1351299834,53cyclictest0-21swapper/310:01:233
1351299834,53cyclictest0-21swapper/309:04:543
13512998314,51cyclictest0-21swapper/309:21:213
13512998314,51cyclictest0-21swapper/309:21:213
13512998313,47cyclictest0-21swapper/306:33:593
1351099838,21cyclictest0-21swapper/109:23:141
1351099838,21cyclictest0-21swapper/109:23:141
1351099835,22cyclictest0-21swapper/110:51:031
1351099834,71cyclictest0-21swapper/108:30:581
1351099833,24cyclictest0-21swapper/110:33:021
13510998320,10cyclictest10288-21sort07:51:041
13510998315,9cyclictest26131-21grep09:51:161
1351299825,62cyclictest0-21swapper/309:06:173
1351299824,71cyclictest0-21swapper/311:06:083
1351299824,69cyclictest30119-21ssh09:58:143
1351299824,56cyclictest0-21swapper/309:26:093
1351299824,56cyclictest0-21swapper/309:26:093
1351299823,54cyclictest6650-21cut07:45:593
1351299822,57cyclictest18776-21ssh08:03:003
1351299822,57cyclictest18776-21ssh08:03:003
13512998210,55cyclictest28965-21fschecks_count10:45:583
13512998210,55cyclictest28965-21fschecks_count10:45:583
1351099824,23cyclictest0-21swapper/110:41:071
13510998234,41cyclictest6260-21systemd-cgroups07:45:471
1351099823,72cyclictest0-21swapper/110:02:191
1351099823,70cyclictest6192-21gltestperf10:11:021
1351099823,18cyclictest0-21swapper/110:45:591
1351099823,18cyclictest0-21swapper/110:45:591
13510998223,7cyclictest1227-21runrttasks06:27:221
1351299815,64cyclictest0-21swapper/308:35:513
1351299814,62cyclictest32696-21iostat_ios10:51:033
13512998111,47cyclictest0-21swapper/306:48:173
1351099818,21cyclictest0-21swapper/108:50:261
1351099816,14cyclictest0-21swapper/109:12:241
1351099814,69cyclictest0-21swapper/109:31:161
1351099814,27cyclictest0-21swapper/110:22:101
13510998130,45cyclictest5586-21cpuspeed_turbos06:36:031
13510998130,45cyclictest5586-21cpuspeed_turbos06:36:031
1351099813,71cyclictest0-21swapper/108:23:371
1351099813,70cyclictest0-21swapper/108:16:061
1351099813,13cyclictest0-21swapper/108:06:151
1351299804,65cyclictest0-21swapper/307:40:013
1351299804,53cyclictest0-21swapper/305:51:193
1351299803,8cyclictest2207-21metacity07:14:473
1351299803,67cyclictest0-21swapper/310:40:313
1351099805,24cyclictest0-21swapper/107:10:081
1351099804,69cyclictest0-21swapper/111:12:001
1351099804,12cyclictest0-21swapper/110:56:081
1351099804,12cyclictest0-21swapper/110:06:041
1351099804,12cyclictest0-21swapper/110:06:041
1351099803,30cyclictest0-21swapper/109:35:561
1351099803,27cyclictest6251-21diskmemload09:42:131
13510998018,13cyclictest0-21swapper/109:26:091
13510998018,13cyclictest0-21swapper/109:26:091
13510998014,8cyclictest6251-21diskmemload08:40:391
274112790,11sleep2281ktimersoftd/209:55:282
219499790,4rtkit-daemon2193-21rtkit-daemon09:46:430
1351299794,42cyclictest0-21swapper/306:36:173
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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