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2026-04-21 - 04:43

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
Click here to display the system's profile data or here to proceed to next system.
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 100 highest latencies:
System rack5slot4s.osadl.org (updated Tue Apr 21, 2026 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
103970724100,5sleep3451irq_work/300:16:273
103970724100,5sleep3451irq_work/300:16:273
85014921640,2sleep3481ktimers/321:06:183
9205102790,8sleep375-21kworker/3:1+mm_percpu_wq22:16:233
8540322760,0sleep1281rcuc/121:11:181
8301702730,2sleep1281rcuc/120:46:181
10057442720,3sleep375-21kworker/3:1-events23:45:013
730840995847,8cyclictest861674-21apt-get21:20:001
730834995447,5cyclictest971255-21/usr/sbin/munin23:11:250
730834995246,4cyclictest812448-21kworker/u8:0+flush-8:023:36:260
730840995145,5cyclictest926459-21kworker/u8:3+flush-8:022:31:151
730840994944,4cyclictest926459-21kworker/u8:3+flush-8:023:06:131
730834994944,4cyclictest995528-21kworker/u8:1+flush-8:023:41:120
730840994742,4cyclictest896783-21kworker/u8:2+flush-8:022:21:131
730840994742,4cyclictest812448-21kworker/u8:0+flush-8:023:36:141
730840994742,4cyclictest725696-21kworker/u8:2+flush-8:020:06:141
730840994737,7cyclictest966012-21latency_hist23:05:011
730840994641,4cyclictest852003-21kworker/u8:3+flush-8:021:26:261
730840994640,5cyclictest725696-21kworker/u8:2+flush-8:019:16:241
730834994639,5cyclictest280-21systemd-journal19:50:000
730834994638,5cyclictest896783-21kworker/u8:2+flush-8:022:26:130
730840994535,8cyclictest280-21systemd-journal21:41:111
730840994535,8cyclictest280-21systemd-journal00:26:121
730840994439,4cyclictest725696-21kworker/u8:2+flush-8:019:56:151
730840994439,4cyclictest725696-21kworker/u8:2+flush-8:019:56:151
730840994339,3cyclictest1020614-21kworker/u8:4+events_unbound00:31:141
730840994338,4cyclictest995528-21kworker/u8:1+flush-8:023:56:261
730840994338,4cyclictest995528-21kworker/u8:1+flush-8:023:51:121
730840994337,4cyclictest715905-21kworker/u8:1+flush-8:019:26:281
730840994337,4cyclictest1020614-21kworker/u8:4+flush-8:000:16:261
730840994337,4cyclictest1020614-21kworker/u8:4+flush-8:000:16:261
730840994332,8cyclictest280-21systemd-journal23:11:121
730834994337,4cyclictest735944-21kworker/u8:3+flush-8:019:16:140
730834994336,4cyclictest715905-21kworker/u8:1+flush-8:019:21:120
10242742430,5sleep30-21swapper/300:01:183
730840994237,4cyclictest725696-21kworker/u8:2+flush-8:021:06:131
730834994237,4cyclictest812448-21kworker/u8:0+flush-8:021:01:130
730834994236,4cyclictest812448-21kworker/u8:0+flush-8:021:56:170
730840994137,3cyclictest812448-21kworker/u8:0+flush-8:022:36:131
730840994134,5cyclictest807564-21apt-get20:26:091
730840994133,6cyclictest280-21systemd-journal19:35:001
730834994134,6cyclictest812448-21kworker/u8:0+flush-8:023:16:130
730840994036,3cyclictest876518-21kworker/u8:1+flush-8:022:11:271
730840994036,3cyclictest862152-21kworker/u8:1+flush-8:021:21:271
730834994033,5cyclictest735944-21kworker/u8:3+flush-8:020:31:250
730840993935,3cyclictest852003-21kworker/u8:3+flush-8:021:31:261
730840993929,8cyclictest280-21systemd-journal23:49:591
7768102380,3sleep375-21kworker/3:1+events19:51:263
730840993834,3cyclictest995528-21kworker/u8:1+flush-8:000:36:261
730840993833,4cyclictest725696-21kworker/u8:2+flush-8:020:51:131
730840993832,5cyclictest812448-21kworker/u8:0+flush-8:021:51:251
730840993832,4cyclictest1020614-21kworker/u8:4+flush-8:000:01:271
730840993832,4cyclictest1000907-21apt-get23:41:081
730840993828,7cyclictest280-21systemd-journal22:18:121
730834993831,4cyclictest995528-21kworker/u8:1+flush-8:023:56:140
730840993732,4cyclictest812448-21kworker/u8:0+flush-8:020:41:271
730840993729,6cyclictest715905-21kworker/u8:1+flush-8:019:11:241
730844993630,4cyclictest1060201-21gpgv00:40:012
730840993631,4cyclictest752898-21kworker/u8:0+flush-8:019:36:221
730840993630,5cyclictest735944-21kworker/u8:3+flush-8:020:31:231
730840993630,4cyclictest812448-21kworker/u8:0+flush-8:022:56:251
730840993630,4cyclictest812448-21kworker/u8:0+flush-8:022:46:271
730840993630,4cyclictest812448-21kworker/u8:0+flush-8:000:11:231
730840993630,4cyclictest812448-21kworker/u8:0+flush-8:000:11:231
730834993630,4cyclictest812448-21kworker/u8:0+flush-8:022:56:130
730834993629,5cyclictest280-21systemd-journal23:28:500
730834993629,5cyclictest280-21systemd-journal19:10:030
730834993627,7cyclictest280-21systemd-journal22:55:010
730840993523,9cyclictest280-21systemd-journal23:26:121
730840993429,4cyclictest725696-21kworker/u8:2+flush-8:020:11:261
730834993430,2cyclictest851774-21idleruntime-cro21:09:590
730834993428,4cyclictest926459-21kworker/u8:3+events_unbound22:31:100
730834993427,6cyclictest862152-21kworker/u8:1+flush-8:021:21:290
730834993427,5cyclictest812448-21kworker/u8:0+flush-8:023:21:280
730834993424,8cyclictest1020970-21diskstats00:01:110
730840993328,4cyclictest725696-21kworker/u8:2+flush-8:019:41:131
730840993326,5cyclictest772064-21grep19:46:301
730840993326,5cyclictest725696-21kworker/u8:2+flush-8:020:56:211
730840993322,7cyclictest280-21systemd-journal20:01:121
730840993320,10cyclictest280-21systemd-journal22:29:591
730844993227,3cyclictest862577-21fschecks_time21:21:142
730844993222,8cyclictest1055208-21awk00:35:012
730840993227,3cyclictest981681-21irqcore23:21:161
730834993228,2cyclictest951174-21idleruntime-cro22:50:000
730834993227,4cyclictest812448-21kworker/u8:0+events_unbound21:11:110
7304672323,4sleep00-21swapper/019:09:060
730840993127,3cyclictest1020614-21kworker/u8:4+flush-8:000:06:131
730840993127,3cyclictest1020614-21kworker/u8:4+flush-8:000:06:131
730840993126,4cyclictest876518-21kworker/u8:1+flush-8:021:46:141
730840993124,3cyclictest0-21swapper/122:41:171
730840993120,8cyclictest821260-21ntpq20:36:231
730834993127,2cyclictest837682-21/usr/sbin/munin20:56:120
730834993127,2cyclictest1025933-21tr00:06:110
730834993127,2cyclictest1025933-21tr00:06:110
730834993125,4cyclictest725696-21kworker/u8:2+flush-8:020:16:250
730834993122,7cyclictest1060160-21apt-get00:40:010
730834993119,10cyclictest763112-21diskstats19:41:120
730844993020,7cyclictest802874-21fschecks_count20:21:132
730840993025,3cyclictest902596-21irqrtprio22:01:161
730840993025,3cyclictest902596-21irqrtprio22:01:161
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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