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2026-04-30 - 15:36

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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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.

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 Thu Apr 30, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
113934322000,2sleep375-21kworker/3:1-events11:31:093
105392521860,2sleep375-21kworker/3:1+events10:05:013
11348892740,6sleep3451irq_work/311:26:073
885516995650,5cyclictest752041-21kworker/u8:0+flush-8:009:51:060
885520995349,3cyclictest1177905-21kworker/u8:0+flush-8:012:21:041
885516995343,7cyclictest988668-21latency_hist08:55:010
885520995244,6cyclictest885357-21kworker/u8:3+flush-8:007:26:061
885520995043,5cyclictest1132426-21kworker/u8:0+flush-8:011:46:051
885520995040,7cyclictest280-21systemd-journal11:00:371
885522994940,7cyclictest962633-21cp08:30:012
885520994942,5cyclictest907937-21kworker/u8:1+flush-8:007:46:191
885520994942,5cyclictest1053787-21kworker/u8:1+flush-8:010:41:051
885520994940,6cyclictest916793-21ntpq07:41:121
10929802480,3chrt371rcuc/210:41:202
885520994737,8cyclictest1057938-21ntpq10:06:181
885516994740,6cyclictest972160-21kworker/u8:3+flush-8:009:46:070
885520994641,4cyclictest752041-21kworker/u8:0+events_unbound07:15:011
885520994641,4cyclictest752041-21kworker/u8:0+events_unbound07:15:011
885516994633,10cyclictest967924-21diskstats08:36:050
885520994538,5cyclictest280-21systemd-journal08:51:311
885520994434,7cyclictest989604-21/usr/sbin/munin09:01:151
885522994326,14cyclictest280-21systemd-journal11:04:002
885520994337,4cyclictest1132426-21kworker/u8:0+flush-8:011:51:051
885520994336,5cyclictest1098627-21kworker/u8:3+flush-8:011:06:061
885520994335,6cyclictest972160-21kworker/u8:3+flush-8:008:46:041
885520994333,8cyclictest280-21systemd-journal12:30:011
885516994335,7cyclictest1093242-21kworker/u8:2+flush-8:010:56:040
885516994335,6cyclictest1147316-21ntpq11:36:120
885516994334,7cyclictest280-21systemd-journal12:39:590
885520994237,4cyclictest1177905-21kworker/u8:0+flush-8:012:16:071
885516994232,8cyclictest962193-21apt-get08:29:590
885516994232,7cyclictest1088425-21latency_hist10:40:010
885522994132,7cyclictest280-21systemd-journal10:50:002
885516994136,3cyclictest1018935-21latency_hist09:30:010
885516994136,3cyclictest1018935-21latency_hist09:30:000
885520994030,8cyclictest280-21systemd-journal12:35:001
8843132401,8sleep30-21swapper/307:06:073
885520993932,5cyclictest907937-21kworker/u8:1+flush-8:008:11:061
885522993829,6cyclictest280-21systemd-journal09:20:002
885520993831,5cyclictest1098692-21apt-get10:51:011
885516993834,3cyclictest907937-21kworker/u8:1+events_unbound08:11:080
885516993830,6cyclictest280-21systemd-journal08:00:580
885522993717,18cyclictest1153174-21cron11:45:002
885522993717,18cyclictest1153174-21cron11:45:002
885522993715,20cyclictest280-21systemd-journal07:53:352
885516993732,4cyclictest977333-21kworker/u8:1+flush-8:009:16:180
885516993728,6cyclictest952256-21latency_hist08:20:010
885522993622,12cyclictest1049222-21aten2_r5power_p10:01:042
885520993629,5cyclictest1027921-21ntpq09:36:141
885516993629,5cyclictest1098627-21kworker/u8:3+flush-8:011:11:060
885516993627,7cyclictest962999-21diskstats08:31:050
885516993626,7cyclictest994261-21latency_hist09:05:010
88551699362,31cyclictest1-21systemd11:00:370
885522993529,4cyclictest1123515-21apt-get11:16:022
885516993530,3cyclictest927588-21systemd-run07:55:010
8851492354,10sleep10-21swapper/107:07:471
885522993428,4cyclictest280-21systemd-journal07:45:012
885522993420,12cyclictest993923-21unixbench_singl09:01:182
885522993420,12cyclictest1073981-21aten2_r5power_p10:26:012
885520993430,3cyclictest977333-21kworker/u8:1+flush-8:009:11:201
885520993430,3cyclictest1009089-21idleruntime-cro09:20:001
885520993429,3cyclictest1064729-21irqrtprio10:16:091
885520993427,5cyclictest1132426-21kworker/u8:0+flush-8:011:41:071
885520993427,5cyclictest1132426-21kworker/u8:0+flush-8:011:41:071
885516993427,5cyclictest280-21systemd-journal07:20:000
885516993427,5cyclictest280-21systemd-journal07:20:000
9165932330,2sleep375-21kworker/3:1+events07:41:113
885522993324,6cyclictest280-21systemd-journal08:50:002
885522993320,11cyclictest999879-21fschecks_time09:11:062
885522993310,13cyclictest0-21swapper/208:06:032
885520993329,3cyclictest977333-21kworker/u8:1+flush-8:009:21:051
885520993327,4cyclictest280-21systemd-journal07:30:351
885520993326,5cyclictest752041-21kworker/u8:0+flush-8:010:01:041
885520993325,5cyclictest280-21systemd-journal10:12:351
885516993324,6cyclictest1078507-21latency_hist10:30:010
88552299323,8cyclictest918003-21apt-get07:46:032
885522993224,6cyclictest280-21systemd-journal09:40:012
88552299322,12cyclictest1122366-21ntpq11:11:162
885522993220,10cyclictest1193312-21fschecks_count12:26:032
885522993219,11cyclictest1098921-21cpuspeed_turbos10:51:032
885520993227,3cyclictest1053787-21kworker/u8:1+flush-8:011:31:061
885520993226,4cyclictest907937-21kworker/u8:1+flush-8:008:20:001
885516993227,4cyclictest885357-21kworker/u8:3+flush-8:007:31:060
885516993227,3cyclictest912684-21cron07:40:010
885516993222,8cyclictest280-21systemd-journal10:31:190
9529782310,3sleep10-21swapper/108:21:061
88552299313,8cyclictest1009419-21apt-get09:21:012
885522993117,12cyclictest1029459-21fschecks_time09:41:042
885520993127,3cyclictest1138964-21kworker/u8:2+flush-8:011:56:061
885520993127,2cyclictest0-21swapper/111:30:001
885520993123,6cyclictest907937-21kworker/u8:1+flush-8:008:06:151
885520993123,6cyclictest280-21systemd-journal07:25:001
885516993127,3cyclictest972160-21kworker/u8:3+flush-8:008:45:010
885516993127,3cyclictest972160-21kworker/u8:3+events_unbound09:31:130
885516993124,3cyclictest0-21swapper/007:21:000
885516993122,6cyclictest1059066-21/usr/sbin/munin10:11:280
885522993015,13cyclictest1014621-21fschecks_count09:26:092
885522993015,13cyclictest1014621-21fschecks_count09:26:092
885520993026,3cyclictest401-21dbus-daemon08:00:001
885520993026,3cyclictest1098627-21kworker/u8:3+flush-8:012:11:201
885520993025,4cyclictest972160-21kworker/u8:3+events_unbound09:31:071
885520993024,5cyclictest1098627-21kworker/u8:3+flush-8:011:16:061
885520993023,6cyclictest1093242-21kworker/u8:2+flush-8:010:46:061
885520993022,5cyclictest972347-21latency_hist08:40:011
885516993026,2cyclictest20977-21cron09:00:000
885516993025,4cyclictest752041-21kworker/u8:0+flush-8:007:26:240
885516993022,6cyclictest1183394-21cpuspeed_turbos12:16:050
885516993019,2cyclictest0-21swapper/012:21:030
88551699301,25cyclictest1-21systemd12:30:010
8852652302,3sleep00-21swapper/007:09:190
88552299299,6cyclictest280-21systemd-journal07:35:012
885522992925,2cyclictest947700-21aten2_r5power_e08:16:012
88552299291,9cyclictest998560-21/usr/sbin/munin09:06:202
885522992913,14cyclictest0-21swapper/210:36:172
885522992912,15cyclictest0-21swapper/209:46:042
885522992912,14cyclictest0-21swapper/208:51:062
885520992923,4cyclictest885357-21kworker/u8:3+flush-8:007:36:191
885520992920,7cyclictest1172074-21ntpq12:01:141
885516992926,2cyclictest8550irq/124-ahci[0000:00:12.0]09:21:050
885516992924,4cyclictest977333-21kworker/u8:1+flush-8:009:06:150
885516992923,5cyclictest1123417-21kworker/u8:2+flush-8:011:21:050
885516992922,6cyclictest972160-21kworker/u8:3+flush-8:008:46:130
88552299282,8cyclictest1163344-21apt-get11:56:032
88552299282,7cyclictest1103664-21apt-get10:56:002
885522992815,11cyclictest933085-21fschecks_count08:01:042
885520992823,4cyclictest1132426-21kworker/u8:0-ext4-rsv-conversion11:24:591
885520992823,4cyclictest1078232-21kworker/u8:0-ext4-rsv-conversion10:40:001
885520992823,3cyclictest1122803-21unixbench_multi11:11:211
885520992822,4cyclictest932821-21apt-get08:01:001
885520992821,5cyclictest977333-21kworker/u8:1+flush-8:009:56:171
885520992821,5cyclictest977333-21kworker/u8:1+flush-8:009:41:151
885516992822,4cyclictest1142326-21needreboot11:31:130
88552299279,4cyclictest891764-21tr07:16:082
88552299279,4cyclictest891764-21tr07:16:082
88552299277,4cyclictest0-21swapper/211:10:002
88552299276,7cyclictest928632-21sed07:56:092
88552299272,6cyclictest946492-21ntpq08:11:152
88552299272,6cyclictest1197983-21apt-get12:31:032
885522992720,5cyclictest280-21systemd-journal08:34:592
88552299271,9cyclictest971497-21ntpq08:36:162
88552299271,4cyclictest1134894-21kthreadcore11:26:062
885522992712,13cyclictest0-21swapper/211:31:162
885520992724,2cyclictest1038331-21unixbench_multi09:46:221
885520992723,2cyclictest1138964-21kworker/u8:2+events_unbound11:36:081
885520992722,3cyclictest958305-21irqrtprio08:26:091
885520992721,4cyclictest962750-21apt-get08:31:011
885520992720,6cyclictest1048497-21kworker/u8:2+flush-8:010:21:191
885516992723,3cyclictest972160-21kworker/u8:3+flush-8:009:36:110
885516992723,2cyclictest0-21swapper/011:26:190
885516992723,2cyclictest0-21swapper/010:00:010
885516992722,3cyclictest1163037-21true11:55:010
885516992722,3cyclictest1053787-21kworker/u8:1+flush-8:010:16:070
885516992721,4cyclictest1132426-21kworker/u8:0+events_unbound11:46:160
88551699271,22cyclictest1-21systemd12:35:000
88552299269,14cyclictest0-21swapper/212:36:092
88552299267,3cyclictest0-21swapper/210:21:032
88552299266,5cyclictest1131826-21tr11:21:112
88552299265,6cyclictest1057742-21grep10:06:142
88552299262,6cyclictest1062906-21ntpq10:11:312
885522992622,2cyclictest972742-21aten2_r5power_e08:41:042
88552299262,11cyclictest1163026-21idleruntime-cro11:55:012
88552299261,8cyclictest898396-21/usr/sbin/munin07:26:032
88552299261,8cyclictest1177105-21ld12:06:172
885522992612,12cyclictest0-21swapper/211:36:122
885522992611,13cyclictest0-21swapper/207:36:162
885520992621,4cyclictest752041-21kworker/u8:0+flush-8:009:06:191
885520992621,4cyclictest401-21dbus-daemon09:00:001
885520992621,4cyclictest1098627-21kworker/u8:3+events_unbound12:06:141
885516992621,4cyclictest1138964-21kworker/u8:2+events_unbound11:56:160
885516992621,4cyclictest1098627-21kworker/u8:3+events_unbound12:11:170
88552299259,13cyclictest0-21swapper/209:31:082
88552299255,6cyclictest953635-21cut08:21:102
885522992522,2cyclictest1154431-21kthreadcore11:46:082
88552299251,8cyclictest1180225-21cut12:11:102
88552299251,8cyclictest1047887-21/usr/sbin/munin09:56:122
88552299251,7cyclictest1191905-21/usr/sbin/munin12:21:142
88552299251,6cyclictest897067-21ntpq07:21:152
88552299251,10cyclictest1064732-21ps10:16:102
885520992522,2cyclictest1078510-21idleruntime-cro10:30:001
885520992521,3cyclictest752041-21kworker/u8:0+events_unbound08:41:191
885520992519,4cyclictest977333-21kworker/u8:1+events_unbound09:50:021
885520992515,8cyclictest1018056-21ntpq09:26:171
885520992515,8cyclictest1018056-21ntpq09:26:171
885516992521,3cyclictest752041-21kworker/u8:0+events_unbound08:25:010
885516992521,3cyclictest1168829-21sort12:01:080
885516992521,3cyclictest1117852-21unixbench_multi11:06:230
885516992521,3cyclictest1048497-21kworker/u8:2+flush-8:010:06:050
885516992521,2cyclictest0-21swapper/007:56:150
885516992520,3cyclictest1152863-21unixbench_singl11:41:230
885516992520,3cyclictest1152863-21unixbench_singl11:41:230
885516992516,7cyclictest280-21systemd-journal11:20:000
88552299248,2cyclictest1078892-21aten2_r5power_e10:31:032
88552299241,8cyclictest1043848-21cron09:55:012
88552299240,9cyclictest1187785-21cron12:20:002
88552299240,8cyclictest988901-21runrttasks08:55:122
885520992420,2cyclictest0-21swapper/110:56:061
885516992420,2cyclictest0-21swapper/010:41:200
885516992419,3cyclictest1000255-21tr09:11:090
885516992419,3cyclictest0-21swapper/010:05:000
885516992418,4cyclictest917361-21unixbench_singl07:41:200
88552299238,2cyclictest1170239-21cut12:01:102
885520992315,6cyclictest1202894-21/usr/sbin/munin12:36:121
885516992320,2cyclictest1-21systemd12:10:010
88552299222,1cyclictest0-21swapper/207:10:562
88552299222,1cyclictest0-21swapper/207:10:562
885520992217,4cyclictest752041-21kworker/u8:0+events_unbound07:51:041
885520992211,2cyclictest0-21swapper/110:31:001
885516992218,2cyclictest1098364-21turbostat.cron10:49:590
885516992218,2cyclictest1033391-21unixbench_multi09:41:200
885516992217,1cyclictest0-21swapper/007:46:200
885516992117,3cyclictest1069683-21sed10:21:080
88551699201,6cyclictest941501-21ntpq08:06:150
885516992016,2cyclictest0-21swapper/010:51:200
8807872194,9sleep20-21swapper/207:05:592
88551699172,5cyclictest0-21swapper/007:12:090
88551699172,5cyclictest0-21swapper/007:12:090
9962062145,5sleep30-21swapper/309:06:103
10631132143,7sleep30-21swapper/310:11:363
9325882132,6sleep30-21swapper/308:00:013
88552099138,3cyclictest0-21swapper/107:10:091
88552099138,3cyclictest0-21swapper/107:10:081
11588842130,3sleep375-21kworker/3:1+events11:51:073
11330842132,7sleep30-21swapper/311:25:003
11107522133,7sleep30-21swapper/311:01:123
10776312133,6sleep30-21swapper/310:26:133
10636972132,6sleep30-21swapper/310:15:013
10379532133,7sleep30-21swapper/309:46:203
10090582132,7sleep30-21swapper/309:20:003
9893312122,5sleep30-21swapper/309:00:013
9818752122,6sleep30-21swapper/308:46:213
9730542122,6sleep30-21swapper/308:41:073
9673662122,5sleep30-21swapper/308:35:013
9660262122,6sleep30-21swapper/308:31:123
9614162122,6sleep30-21swapper/308:26:183
9531122122,6sleep30-21swapper/308:21:093
9475832122,6sleep30-21swapper/308:15:353
9423482122,5sleep30-21swapper/308:10:013
9377612122,6sleep30-21swapper/308:06:043
9220092122,6sleep30-21swapper/307:46:213
9077342122,6sleep30-21swapper/307:35:023
8974652122,6sleep30-21swapper/307:21:223
8882772122,6sleep30-21swapper/307:16:003
8882772122,6sleep30-21swapper/307:16:003
8856802122,6sleep30-21swapper/307:10:463
8856802122,6sleep30-21swapper/307:10:463
11966352123,5sleep30-21swapper/312:26:123
11878362122,6sleep30-21swapper/312:20:023
11835592122,6sleep30-21swapper/312:16:083
11821252122,6sleep30-21swapper/312:11:193
11769102122,6sleep30-21swapper/312:06:133
11687382122,6sleep30-21swapper/312:01:083
11630202122,6sleep30-21swapper/311:55:013
11475922122,6sleep30-21swapper/311:36:203
11133372122,5sleep30-21swapper/311:05:023
10884682122,5sleep30-21swapper/310:40:023
10539252122,6sleep30-21swapper/310:05:013
10288632122,6sleep30-21swapper/309:40:023
10095052122,6sleep30-21swapper/309:21:043
9889572112,5sleep30-21swapper/308:55:563
9824952112,5sleep30-21swapper/308:50:013
9278642112,5sleep30-21swapper/307:56:013
9229392112,6sleep30-21swapper/307:51:033
8981942112,5sleep30-21swapper/307:26:033
12028172112,5sleep30-21swapper/312:35:033
11979572112,5sleep30-21swapper/312:31:013
11535652112,5sleep30-21swapper/311:46:033
11482282112,5sleep30-21swapper/311:40:013
11482282112,5sleep30-21swapper/311:40:013
11239922111,6sleep30-21swapper/311:16:093
11185612112,5sleep30-21swapper/311:11:033
11035642112,5sleep30-21swapper/310:55:023
10992172112,5sleep30-21swapper/310:51:093
10937622112,5sleep30-21swapper/310:46:033
10873972112,5sleep30-21swapper/310:36:123
10787312112,5sleep30-21swapper/310:30:023
10689792112,5sleep30-21swapper/310:21:023
10446572110,7sleep30-21swapper/309:56:073
10394992112,6sleep30-21swapper/309:51:053
10281972112,5sleep30-21swapper/309:36:213
10192042112,5sleep30-21swapper/309:30:393
10140922112,5sleep30-21swapper/309:25:013
10140922112,5sleep30-21swapper/309:25:013
10030582112,5sleep30-21swapper/309:11:133
9030212102,5sleep30-21swapper/307:30:043
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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