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2026-04-17 - 02:08

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system
Characteristics of the highest latencies:
System rack5slot4s.osadl.org (updated Fri Apr 17, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
179575523230,2sleep375-21kworker/3:1+events23:31:203
169386722300,5sleep30-21swapper/321:50:013
160238521070,6chrt0-21swapper/220:16:182
15800952990,2sleep375-21kworker/3:1+events19:56:133
15800952990,2sleep375-21kworker/3:1+events19:56:133
1533144996151,7cyclictest1683820-21latency_hist21:40:011
1533144995953,4cyclictest1654170-21kworker/u8:1+events_unbound21:16:141
1533144995853,4cyclictest1822832-21kworker/u8:2+events_unbound00:36:321
1533144995853,4cyclictest1822832-21kworker/u8:2+events_unbound00:36:321
1533144995752,3cyclictest1584927-21kworker/u8:3+events_unbound20:36:241
1533144995348,3cyclictest1689056-21kworker/u8:0+flush-8:022:46:291
1533144995247,3cyclictest1549957-21kworker/u8:2+flush-8:019:26:161
1533144995246,4cyclictest1584927-21kworker/u8:3+flush-8:020:56:251
1533144995246,4cyclictest1584927-21kworker/u8:3+flush-8:020:01:291
1533144995246,4cyclictest1584927-21kworker/u8:3+flush-8:020:01:291
1533144995245,5cyclictest1753354-21kworker/u8:2+flush-8:022:56:301
1533144995245,5cyclictest1584927-21kworker/u8:3+flush-8:021:06:271
1533144995147,3cyclictest1822832-21kworker/u8:2+events_unbound00:26:151
1533144995145,4cyclictest1486656-21kworker/u8:0+events_unbound19:21:231
1533144995044,4cyclictest1689056-21kworker/u8:0+events_unbound22:41:301
1533144995044,4cyclictest1584927-21kworker/u8:3+events_unbound22:11:151
1533144995043,6cyclictest1713346-21kworker/u8:1+flush-8:023:06:271
1533144995043,6cyclictest1584927-21kworker/u8:3+events_unbound20:11:141
1533144995043,5cyclictest1584927-21kworker/u8:3+flush-8:020:21:251
1533139995043,5cyclictest1718778-21apt-get22:16:110
1533144994943,4cyclictest1767919-21kworker/u8:0+events_unbound00:01:301
1533144994943,4cyclictest1486656-21kworker/u8:0+flush-8:019:51:251
1533144994943,4cyclictest1486656-21kworker/u8:0+flush-8:019:51:241
1533144994942,5cyclictest1654170-21kworker/u8:1+events_unbound21:26:161
1533144994942,5cyclictest1584927-21kworker/u8:3+flush-8:020:16:271
1533144994942,5cyclictest1549957-21kworker/u8:2+flush-8:019:56:261
1533144994942,5cyclictest1549957-21kworker/u8:2+flush-8:019:56:261
1533139994943,4cyclictest1486656-21kworker/u8:0+flush-8:019:15:040
1533139994942,5cyclictest1639370-21/usr/sbin/munin20:56:280
16963672480,4chrt0-21swapper/321:51:213
1533144994844,3cyclictest1713346-21kworker/u8:1+events_unbound23:51:141
1533144994743,3cyclictest1713346-21kworker/u8:1+events_unbound23:01:191
1533144994743,3cyclictest1713346-21kworker/u8:1+events_unbound00:21:161
1533144994743,3cyclictest1713346-21kworker/u8:1+events_unbound00:21:161
1533144994742,4cyclictest1689056-21kworker/u8:0+flush-8:022:36:261
1533144994741,4cyclictest1689056-21kworker/u8:0+events_unbound22:21:151
1533144994741,4cyclictest1549957-21kworker/u8:2+events_unbound19:31:151
1533144994740,5cyclictest1713346-21kworker/u8:1+flush-8:023:41:251
1533144994738,7cyclictest1584927-21kworker/u8:3+flush-8:020:46:281
1533139994741,4cyclictest1549957-21kworker/u8:2+flush-8:019:41:280
1533139994740,5cyclictest1584927-21kworker/u8:3+flush-8:021:06:250
1533139994740,5cyclictest1549957-21kworker/u8:2+flush-8:019:26:250
1533144994641,4cyclictest1767919-21kworker/u8:0+events_unbound23:26:141
1533144994641,3cyclictest1584927-21kworker/u8:3+flush-8:020:06:261
1533144994640,4cyclictest1584927-21kworker/u8:3+flush-8:023:21:291
1533144994639,5cyclictest1584927-21kworker/u8:3+flush-8:020:51:241
1533144994635,8cyclictest1692868-21ntpq21:46:241
1533144994541,3cyclictest1584927-21kworker/u8:3+events_unbound21:11:201
1533144994538,5cyclictest1584927-21kworker/u8:3+flush-8:023:31:321
1533144994439,4cyclictest1689056-21kworker/u8:0+events_unbound21:56:161
1533139994438,4cyclictest1549957-21kworker/u8:2+flush-8:021:01:150
1533144994338,4cyclictest1767919-21kworker/u8:0+events_unbound00:06:121
1533144994335,6cyclictest1757452-21ntpq22:51:251
1533139994338,3cyclictest1689056-21kworker/u8:0+flush-8:021:56:290
1533144994238,3cyclictest1584927-21kworker/u8:3+flush-8:020:31:291
1533144994237,4cyclictest1584927-21kworker/u8:3+flush-8:022:01:261
1533144994237,4cyclictest1584927-21kworker/u8:3+events_unbound23:56:171
1533144994135,4cyclictest1713346-21kworker/u8:1+flush-8:022:26:161
1533144994135,4cyclictest1584927-21kworker/u8:3+events_unbound23:46:301
1533144994135,4cyclictest1549957-21kworker/u8:2+flush-8:019:36:251
1533144994134,6cyclictest1767919-21kworker/u8:0+events_unbound00:11:261
1533144994134,6cyclictest1767919-21kworker/u8:0+events_unbound00:11:261
1533139994137,3cyclictest1654170-21kworker/u8:1+flush-8:021:26:300
1533139994133,6cyclictest280-21systemd-journal21:35:010
1533139994132,6cyclictest1658870-21latency_hist21:15:010
1533139994129,9cyclictest280-21systemd-journal23:00:000
1533149994031,7cyclictest280-21systemd-journal19:51:242
1533149994031,7cyclictest280-21systemd-journal19:51:242
1533144994033,5cyclictest1549957-21kworker/u8:2+events_unbound20:26:131
1533139994033,5cyclictest280-21systemd-journal23:54:220
1533139994033,5cyclictest1598618-21ntpq20:11:230
1533149993931,6cyclictest280-21systemd-journal19:30:002
1533149993929,8cyclictest280-21systemd-journal21:06:222
1533144993933,4cyclictest1549957-21kworker/u8:2+events_unbound19:41:151
1533144993931,6cyclictest1713346-21kworker/u8:1+flush-8:022:16:271
1533149993829,7cyclictest280-21systemd-journal19:50:002
1533144993832,4cyclictest1654170-21kworker/u8:1+flush-8:021:21:191
1533144993831,5cyclictest1767919-21kworker/u8:0+flush-8:023:16:271
1533144993831,5cyclictest1549957-21kworker/u8:2+flush-8:021:31:231
1533144993828,7cyclictest1842351-21latency_hist00:20:011
1533144993828,7cyclictest1842351-21latency_hist00:20:011
1533149993728,7cyclictest280-21systemd-journal21:35:002
1533144993731,4cyclictest1486656-21kworker/u8:0+flush-8:019:46:271
1533144993730,5cyclictest1689056-21kworker/u8:0+flush-8:021:51:311
1533139993732,4cyclictest1501592-21kworker/u8:1+flush-8:019:11:160
17796682360,6sleep20-21swapper/223:16:202
1533144993630,4cyclictest1549957-21kworker/u8:2+events_unbound20:41:191
1533139993632,3cyclictest1713346-21kworker/u8:1+flush-8:000:21:170
1533139993632,3cyclictest1713346-21kworker/u8:1+flush-8:000:21:170
1533139993632,3cyclictest1486656-21kworker/u8:0+flush-8:019:21:310
1533144993429,3cyclictest1689056-21kworker/u8:0+flush-8:022:31:271
1533144993428,5cyclictest1767919-21kworker/u8:0+flush-8:023:36:231
1533144993427,5cyclictest1501592-21kworker/u8:1+events_unbound19:16:141
15284132343,10sleep10-21swapper/119:05:551
1533144993329,3cyclictest1654170-21kworker/u8:1+flush-8:021:41:301
1533144993328,3cyclictest1713346-21kworker/u8:1+flush-8:023:11:191
1533144993326,5cyclictest1767919-21kworker/u8:0+flush-8:000:31:261
1533139993328,4cyclictest1822832-21kworker/u8:2+events_unbound00:16:310
1533139993328,4cyclictest1822832-21kworker/u8:2+events_unbound00:16:310
1533139993326,5cyclictest280-21systemd-journal22:25:000
153314999320,15cyclictest1689464-21cut21:46:162
1533144993226,4cyclictest1549957-21kworker/u8:2+flush-8:021:01:191
1533139993227,4cyclictest1713346-21kworker/u8:1+flush-8:023:11:280
1533139993227,4cyclictest1549957-21kworker/u8:2+flush-8:020:41:170
1533139993227,3cyclictest1802480-21unixbench_singl23:36:290
1533149993121,8cyclictest1847306-21awk00:25:002
1533149993121,8cyclictest1847306-21awk00:25:002
1533139993127,3cyclictest1584927-21kworker/u8:3+flush-8:023:42:520
1533139993127,3cyclictest1559985-21systemd-run19:35:000
1533149993017,10cyclictest1564171-21ntpq19:36:282
1533139993025,4cyclictest1689056-21kworker/u8:0+flush-8:022:46:270
1533139993025,4cyclictest1584927-21kworker/u8:3+flush-8:023:46:170
1533139993023,5cyclictest1549957-21kworker/u8:2+flush-8:019:56:240
1533139993023,5cyclictest1549957-21kworker/u8:2+flush-8:019:56:240
1533139993020,8cyclictest1694314-21diskstats21:51:150
1533139993019,8cyclictest280-21systemd-journal20:51:210
1533149992926,2cyclictest1708553-21basename22:05:002
1533149992925,2cyclictest1772829-21unixbench_singl23:06:312
1533149992924,3cyclictest1559584-21unixbench_multi19:31:292
1533144992924,4cyclictest1501592-21kworker/u8:1+flush-8:019:11:191
1533139992925,2cyclictest0-21swapper/022:05:000
1533139992924,4cyclictest1713346-21kworker/u8:1+flush-8:023:56:310
1533149992819,7cyclictest1738847-21grep22:36:142
1533139992823,4cyclictest1767919-21kworker/u8:0+events_unbound00:11:300
1533139992823,4cyclictest1767919-21kworker/u8:0+events_unbound00:11:290
1533139992823,4cyclictest1584927-21kworker/u8:3+flush-8:023:21:520
1533139992822,5cyclictest1584927-21kworker/u8:3+flush-8:021:36:250
1533139992822,4cyclictest1654170-21kworker/u8:1+flush-8:021:21:300
1533139992822,4cyclictest1549957-21kworker/u8:2+flush-8:020:26:250
1533139992821,6cyclictest1654170-21kworker/u8:1+events_unbound21:41:240
15283652282,5sleep00-21swapper/019:05:180
1533149992722,3cyclictest1584292-21unixbench_multi19:56:312
1533149992722,3cyclictest1584292-21unixbench_multi19:56:312
1533149992721,4cyclictest1698328-21unixbench_singl21:51:322
153314999271,10cyclictest1797936-21cat23:35:002
1533139992724,2cyclictest1713346-21kworker/u8:1+flush-8:022:51:450
1533139992722,4cyclictest1689056-21kworker/u8:0+flush-8:022:35:530
1533139992722,4cyclictest1549957-21kworker/u8:2+flush-8:021:46:260
1533139992722,4cyclictest1486656-21kworker/u8:0+flush-8:019:46:250
1533149992611,9cyclictest1827874-21apt-get00:06:102
1533139992622,3cyclictest1584927-21kworker/u8:3+flush-8:020:21:280
1533139992622,2cyclictest1847901-21fschecks_count00:26:160
1533139992621,4cyclictest1549957-21kworker/u8:2+flush-8:020:19:520
1533139992620,4cyclictest1689056-21kworker/u8:0+flush-8:022:31:230
1533149992521,2cyclictest1629581-21aten2_r5power_c20:46:132
1533149992516,4cyclictest1718778-21apt-get22:16:122
153313999252,22cyclictest0-21swapper/020:36:300
1533139992520,4cyclictest1549957-21kworker/u8:2+events_unbound22:06:300
1533139992520,3cyclictest1663464-21unixbench_singl21:16:310
1533139992518,5cyclictest1584927-21kworker/u8:3+flush-8:020:45:540
1533139992518,5cyclictest1584927-21kworker/u8:3+flush-8:020:06:230
1533139992516,7cyclictest1585006-21/usr/sbin/munin20:01:230
1533139992516,7cyclictest1585006-21/usr/sbin/munin20:01:230
1533149992416,6cyclictest1673974-21cat21:30:012
1533149992411,9cyclictest1822943-21apt-get00:01:122
1533144992419,4cyclictest1549957-21kworker/u8:2+flush-8:022:06:271
1533139992418,5cyclictest1822832-21kworker/u8:2+flush-8:000:06:260
1533139992418,4cyclictest1689056-21kworker/u8:0+events_unbound22:41:260
153314999238,10cyclictest1604816-21taskset20:21:122
153314999236,1cyclictest0-21swapper/200:16:322
153314999236,1cyclictest0-21swapper/200:16:322
153314999232,5cyclictest1713821-21apt-get22:11:112
153314999232,11cyclictest1851447-21ntpq00:26:262
153314999232,11cyclictest1667857-21ntpq21:21:252
1533149992319,2cyclictest0-21swapper/222:21:182
1533149992318,3cyclictest1763217-21cron22:59:592
153314999231,7cyclictest1687919-21ntpq21:41:232
1533149992317,5cyclictest1822600-21tar00:00:002
153314999231,6cyclictest1806894-21ntpq23:41:252
153314999231,5cyclictest1783413-21apt-get23:21:122
1533149992314,4cyclictest1852592-21apt-get00:31:132
153314999231,11cyclictest1732398-21ntpq22:26:242
153314999231,11cyclictest1702813-21ntpq21:56:272
1533139992321,1cyclictest1584927-21kworker/u8:3+events_unbound23:31:240
1533139992321,1cyclictest0-21swapper/000:31:300
1533139992318,4cyclictest1619028-21unixbench_singl20:31:300
153314999228,11cyclictest1792197-21/usr/sbin/munin23:26:292
153314999225,4cyclictest0-21swapper/220:10:312
153314999223,9cyclictest0-21swapper/221:04:512
153314999222,4cyclictest0-21swapper/220:55:202
1533149992219,2cyclictest1663436-21unixbench_multi21:16:302
1533149992218,2cyclictest1773612-21aten2_r5power_v23:11:132
1533149992214,4cyclictest1569061-21ntpq19:41:242
1533149992212,5cyclictest1545235-21apt-get19:21:112
153314999221,11cyclictest1752486-21ntpq22:46:232
153314999221,11cyclictest1618489-21ntpq20:31:232
153314999221,11cyclictest1613516-21ntpq20:26:242
153313999226,9cyclictest0-21swapper/023:26:250
1533139992219,2cyclictest0-21swapper/022:26:190
1533139992218,3cyclictest1767919-21kworker/u8:0+flush-8:000:02:520
1533139992218,2cyclictest0-21swapper/019:51:310
1533139992218,2cyclictest0-21swapper/019:51:310
1533139992217,4cyclictest1767919-21kworker/u8:0+flush-8:023:16:240
153314999217,6cyclictest0-21swapper/221:36:132
153314999217,4cyclictest0-21swapper/223:01:142
153314999217,11cyclictest1836674-21/usr/sbin/munin00:11:282
153314999217,11cyclictest1836674-21/usr/sbin/munin00:11:282
153314999216,4cyclictest0-21swapper/220:06:102
153314999216,4cyclictest0-21swapper/200:35:402
153314999216,4cyclictest0-21swapper/200:35:402
153314999215,4cyclictest0-21swapper/222:43:242
153314999213,5cyclictest0-21swapper/219:16:272
153314999211,9cyclictest39-21ksoftirqd/223:52:482
1533149992116,4cyclictest1737819-21unixbench_multi22:31:332
1533149992112,4cyclictest1533377-21apt-get19:11:132
153314999210,11cyclictest1757433-21ntpq22:51:252
1533139992117,3cyclictest1713346-21kworker/u8:1+events_unbound23:06:280
1533139992116,4cyclictest1549957-21kworker/u8:2+events_unbound19:36:140
1533139992115,5cyclictest1584927-21kworker/u8:3+flush-8:022:11:260
153314999206,6cyclictest0-21swapper/220:41:292
153314999205,6cyclictest0-21swapper/220:03:232
153314999205,6cyclictest0-21swapper/220:03:222
153314999204,7cyclictest0-21swapper/222:09:342
1533149992017,2cyclictest1798245-21aten2_r5power_c23:36:112
153314999201,4cyclictest1811809-21ntpq23:46:262
153314999200,6cyclictest39-21ksoftirqd/220:38:142
1533139992016,3cyclictest0-21swapper/000:36:250
1533139992016,3cyclictest0-21swapper/000:36:250
15281372202,8sleep30-21swapper/319:05:013
153314999195,4cyclictest0-21swapper/221:10:512
153314999193,4cyclictest0-21swapper/220:51:232
1533139991914,3cyclictest1764312-21tr23:01:190
15288312194,9sleep20-21swapper/219:06:162
18525952152,8sleep30-21swapper/300:31:133
17325402144,6sleep30-21swapper/322:26:293
16483822144,7sleep30-21swapper/321:01:313
17186242132,6sleep30-21swapper/322:15:023
17043302132,7sleep30-21swapper/322:01:183
16788692132,6sleep30-21swapper/321:35:013
16390422133,7sleep30-21swapper/320:55:003
16134582132,7sleep30-21swapper/320:26:233
18513482122,6sleep30-21swapper/300:26:243
18465752122,6sleep30-21swapper/300:21:303
18465752122,6sleep30-21swapper/300:21:293
18238252122,6sleep30-21swapper/300:01:203
18070292122,6sleep30-21swapper/323:41:303
17781212122,5sleep30-21swapper/323:15:013
17773462123,5sleep30-21swapper/323:11:283
17684312122,6sleep30-21swapper/323:05:223
17533522122,5sleep30-21swapper/322:50:013
17490622122,6sleep30-21swapper/322:46:163
17436142122,5sleep30-21swapper/322:40:023
17357672122,6sleep30-21swapper/322:31:233
17274302123,6sleep30-21swapper/322:21:243
17153232122,6sleep30-21swapper/322:11:213
17134692123,5sleep30-21swapper/322:10:003
16995772122,6sleep30-21swapper/321:56:203
16844132122,6sleep30-21swapper/321:41:153
16690762122,6sleep30-21swapper/321:26:143
16492752122,6sleep30-21swapper/321:06:083
16299242122,6sleep30-21swapper/320:46:183
16193942122,6sleep30-21swapper/320:35:023
15948702122,6sleep30-21swapper/320:11:103
15852752122,6sleep30-21swapper/320:01:153
15852752122,6sleep30-21swapper/320:01:153
15758222122,6sleep30-21swapper/319:51:203
15758222122,6sleep30-21swapper/319:51:203
15747902121,7sleep30-21swapper/319:50:003
15550492122,6sleep30-21swapper/319:30:013
15512912122,6sleep30-21swapper/319:26:203
15488262122,6sleep30-21swapper/319:21:233
15379632122,6sleep30-21swapper/319:14:243
18577532112,5sleep30-21swapper/300:36:153
18577532112,5sleep30-21swapper/300:36:143
18379942111,6sleep30-21swapper/300:16:173
18379942111,6sleep30-21swapper/300:16:173
18327832112,5sleep30-21swapper/300:11:113
18327832112,5sleep30-21swapper/300:11:113
18275642112,5sleep30-21swapper/300:05:013
18182052112,5sleep30-21swapper/323:56:183
18130222112,5sleep30-21swapper/323:51:133
18085042112,5sleep30-21swapper/323:46:193
17982192112,5sleep30-21swapper/323:36:123
17882402112,5sleep30-21swapper/323:25:243
17841242112,5sleep30-21swapper/323:21:193
17634722113,5sleep30-21swapper/323:00:043
17590882113,5sleep30-21swapper/322:56:193
17396502112,5sleep30-21swapper/322:36:213
16829482112,5sleep30-21swapper/321:36:253
16686122112,6sleep30-21swapper/321:23:383
16600862112,5sleep30-21swapper/321:16:193
16579922112,5sleep30-21swapper/321:11:263
16404642112,5sleep30-21swapper/320:56:213
16245922112,5sleep30-21swapper/320:41:123
16171972112,5sleep30-21swapper/320:31:203
16049092112,5sleep30-21swapper/320:21:143
16003352112,6sleep30-21swapper/320:16:163
15938372112,5sleep30-21swapper/320:06:293
15691912112,5sleep30-21swapper/319:41:283
15602722112,5sleep30-21swapper/319:36:113
15402942112,5sleep30-21swapper/319:16:133
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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