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2026-05-09 - 06:10

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 Sat May 09, 2026 00:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
131426421900,2sleep375-21kworker/3:1+events20:31:033
138019121800,5sleep30-21swapper/321:36:043
14858332800,2sleep3471rcuc/323:21:133
1231973997556,17cyclictest1561238-21apt-get00:40:001
1231973997362,8cyclictest1263525-21latency_hist19:40:011
1231973996442,20cyclictest1353071-21apt-get21:10:531
1231977996051,7cyclictest1342733-21gpgv21:00:012
1231973995648,5cyclictest280-21systemd-journal23:40:561
1231973995549,4cyclictest1372208-21kworker/u8:0+events_unbound21:56:061
1231973995536,6cyclictest1451785-21latency_hist22:50:001
13904412540,3chrt75-21kworker/3:1-events21:46:023
1231977995446,6cyclictest1501515-21cp23:40:002
13594872530,1sleep01359491-21grep21:16:020
1231973995337,4cyclictest1328132-21apt-get20:45:541
13697622500,3chrt0-21swapper/021:26:020
1231973995041,6cyclictest1412269-21latency_hist22:10:011
1231968995043,5cyclictest1417513-21apt-get22:15:530
1231973994927,9cyclictest1496209-21apt-get23:35:001
1231968994940,7cyclictest280-21systemd-journal20:40:000
1231973994639,5cyclictest1273726-21apt-get19:50:551
1231973994636,8cyclictest1511565-21apt-get23:50:001
1231973994636,7cyclictest280-21systemd-journal20:26:561
1231973994636,7cyclictest1476452-21latency_hist23:15:011
1231968994627,15cyclictest1521695-21latency_hist00:00:010
1231968994534,8cyclictest1510686-21ntpq23:46:070
1231968994533,9cyclictest280-21systemd-journal20:05:010
1231973994437,5cyclictest1541822-21apt-get00:20:551
1231968994436,6cyclictest1317046-21ntpq20:31:070
1231968994432,9cyclictest1277431-21ntpq19:51:080
1231977994333,8cyclictest1496373-21cat23:35:002
1231968994331,9cyclictest1297296-21ntpq20:11:090
1231968994327,14cyclictest1486363-21systemd-run23:25:000
123196899431,26cyclictest1561311-21munin-run00:40:000
1231977994232,7cyclictest1511881-21cat23:50:012
1231973994235,5cyclictest280-21systemd-journal00:09:051
1231973994233,7cyclictest280-21systemd-journal20:15:001
1231968994233,6cyclictest1556285-21latency_hist00:35:010
1231968994224,16cyclictest1501412-21munin-run23:40:000
1231968994223,17cyclictest1342607-21apt-get21:00:000
1231968994214,17cyclictest0-21swapper/021:35:560
1231973994132,6cyclictest1481413-21latency_hist23:20:011
1231973994132,6cyclictest1317933-21latency_hist20:35:011
1231968994130,9cyclictest1437506-21diskstats22:35:590
1231968994115,22cyclictest0-21swapper/021:50:540
1231977994030,7cyclictest1372863-21cat21:30:002
1231973994033,5cyclictest1551685-21apt-get00:30:541
1231973994030,8cyclictest280-21systemd-journal21:20:011
1231973994029,8cyclictest280-21systemd-journal20:02:551
1231968993929,7cyclictest280-21systemd-journal19:56:570
1231968993923,14cyclictest1376758-21needreboot21:31:060
1231968993922,15cyclictest0-21swapper/023:34:590
1231968993919,18cyclictest1247795-21ntpq19:21:050
1231977993831,5cyclictest280-21systemd-journal21:10:002
1231977993828,8cyclictest1561254-21awk00:40:002
1231973993833,3cyclictest1372208-21kworker/u8:0+flush-8:022:11:131
1231973993832,4cyclictest390308-21kworker/u8:4+events_unbound21:31:131
1231973993830,4cyclictest0-21swapper/123:35:551
1231968993830,6cyclictest280-21systemd-journal20:53:040
1231968993829,7cyclictest1348364-21diskstats21:05:590
1231968993811,19cyclictest1427092-21kworker/0:2+events22:30:550
1231973993731,4cyclictest390308-21kworker/u8:4+flush-8:020:06:131
1231973993728,6cyclictest1303105-21latency_hist20:20:001
1231973993727,8cyclictest1343177-21apt-get21:00:541
123196899378,8cyclictest1343152-21munin-node21:00:540
1231968993719,16cyclictest0-21swapper/021:11:030
1231973993631,3cyclictest1427383-21apt-get22:25:541
1231973993626,8cyclictest1540599-21ntpq00:16:061
123197399361,31cyclictest1-21systemd21:25:001
1231968993630,4cyclictest280-21systemd-journal19:25:550
1231968993617,17cyclictest1526374-21unixbench_singl00:01:140
1231968993616,18cyclictest280-21systemd-journal20:30:000
1231973993529,4cyclictest390308-21kworker/u8:4+flush-8:021:40:011
1231973993529,4cyclictest1551033-21grep00:26:151
1231973993527,6cyclictest1466921-21apt-get23:05:551
1231973993527,6cyclictest1367893-21apt-get21:25:521
1231973993527,5cyclictest280-21systemd-journal22:20:561
123196899359,4cyclictest0-21swapper/020:17:430
1231968993530,3cyclictest1551368-21idleruntime-cro00:30:000
1231968993524,8cyclictest1475559-21ntpq23:11:070
1231968993518,15cyclictest0-21swapper/021:40:560
1231968993517,16cyclictest0-21swapper/019:15:020
1231968993511,6cyclictest1258573-21latency_hist19:35:010
1231973993430,3cyclictest1236951-21kworker/u8:1+flush-8:019:46:121
1231973993430,2cyclictest1348833-21irqrtprio21:06:021
1231973993422,9cyclictest280-21systemd-journal19:40:561
123196899349,4cyclictest1534840-21tr00:11:060
1231968993424,7cyclictest1303690-21diskstats20:20:570
1231968993415,17cyclictest0-21swapper/000:15:570
1231968993412,3cyclictest0-21swapper/000:09:040
13058682330,5sleep30-21swapper/320:21:043
1231977993324,7cyclictest1337680-21awk20:55:002
1231973993326,5cyclictest280-21systemd-journal22:20:001
1231973993326,5cyclictest280-21systemd-journal21:45:011
1231973993326,5cyclictest1520794-21ntpq23:56:071
1231968993327,4cyclictest1505703-21ntpq23:41:060
1231968993316,15cyclictest0-21swapper/023:16:030
1231968993314,2cyclictest0-21swapper/019:46:040
1231973993227,3cyclictest1395011-21kthreadcore21:51:031
1231973993226,4cyclictest402814-21kworker/u8:0+flush-8:019:16:111
1231973993226,4cyclictest390308-21kworker/u8:4+events_unbound19:11:031
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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