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2026-05-20 - 01:06

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 May 19, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
13285992650,2sleep3471rcuc/307:20:573
13514872630,5sleep30-21swapper/307:45:483
1314034995732,22cyclictest1404693-21ntpq08:36:000
1314039995242,7cyclictest1539548-21latency_hist10:55:011
1314042995141,7cyclictest1704890-21systemd-journal11:00:002
1314039995143,6cyclictest1345799-21kworker/u8:2+events_unbound10:56:031
1314034994838,7cyclictest1390713-21latency_hist08:25:010
1314039994738,7cyclictest1627631-21ntpq12:20:591
1314034994740,5cyclictest1335728-21kworker/u8:0+flush-8:009:31:020
1314039994641,4cyclictest1335728-21kworker/u8:0+events_unbound10:16:021
1314039994536,6cyclictest1370910-21latency_hist08:05:011
1314039994435,6cyclictest1564241-21latency_hist11:20:001
1314034994434,8cyclictest1548542-21ntpq11:01:010
1314034994420,21cyclictest1379912-21ntpq08:10:590
1314034994420,21cyclictest1379912-21ntpq08:10:580
1314039994338,3cyclictest1465426-21kworker/u8:1+flush-8:010:21:051
1314039994337,5cyclictest1335728-21kworker/u8:0+flush-8:010:11:011
1314034994335,5cyclictest1529672-21latency_hist10:45:010
131403499431,27cyclictest1425292-21sshd08:56:330
1314034994234,6cyclictest1579390-21/usr/sbin/munin11:35:580
1314034994234,6cyclictest1579113-21latency_hist11:35:000
1314034994232,8cyclictest1444493-21ntpq09:16:010
1314034994221,17cyclictest0-21swapper/010:30:030
1314034994220,19cyclictest1524696-21latency_hist10:40:010
1314042994134,5cyclictest1514995-21base6410:30:012
1314039994132,7cyclictest1429742-21ntpq09:01:051
1314039994132,7cyclictest1414909-21ntpq08:46:021
131403499415,26cyclictest0-21swapper/011:53:390
1314034994119,20cyclictest1484532-21grep09:56:060
1314039994035,3cyclictest459996-21kworker/u8:3+flush-8:007:16:031
1314039994035,3cyclictest1345799-21kworker/u8:2+flush-8:008:36:041
1314039994033,5cyclictest1335728-21kworker/u8:0+flush-8:007:56:061
1314039994033,5cyclictest1313887-21kworker/u8:1+events_unbound07:51:041
1314039994030,8cyclictest1593027-21ntpq11:46:001
1314034994010,21cyclictest0-21swapper/009:24:120
1314042993931,5cyclictest1485124-21cat10:00:012
1314039993933,4cyclictest1335728-21kworker/u8:0+flush-8:009:11:061
1314039993932,5cyclictest1385958-21kworker/u8:1+flush-8:008:51:011
1314034993921,16cyclictest1504301-21unixbench_multi10:16:050
131403499391,24cyclictest401-21dbus-daemon11:10:010
1314042993833,4cyclictest1313887-21kworker/u8:1+flush-8:008:06:042
1314042993831,5cyclictest1335728-21kworker/u8:0+flush-8:007:41:022
1314039993832,4cyclictest1465426-21kworker/u8:1+flush-8:010:40:531
1314039993831,5cyclictest1465426-21kworker/u8:1+events_unbound10:06:031
131403499388,21cyclictest0-21swapper/008:47:160
1314034993825,10cyclictest1704890-21systemd-journal10:29:590
1314042993729,6cyclictest1415710-21cat08:50:002
1314039993733,3cyclictest1335728-21kworker/u8:0+events_unbound07:40:011
1314039993731,4cyclictest459996-21kworker/u8:3+flush-8:007:10:541
1314034993727,8cyclictest1622718-21ntpq12:16:020
1314034993720,15cyclictest1638532-21apt-key12:35:000
1314034993720,15cyclictest1638532-21apt-key12:35:000
131380923722,9sleep30-21swapper/307:09:303
1314039993630,5cyclictest1345799-21kworker/u8:2+flush-8:009:21:001
1314039993629,5cyclictest1430837-21apt-get09:05:481
1314039993628,6cyclictest1568334-21ntpq11:21:011
1314039993627,6cyclictest1534584-21latency_hist10:50:001
1314039993626,8cyclictest1607892-21ntpq12:01:031
1314034993629,5cyclictest1375817-21latency_hist08:10:010
1314034993619,15cyclictest1330735-21unixbench_singl07:21:070
1314034993616,17cyclictest1395644-21latency_hist08:30:010
13135782363,9sleep10-21swapper/107:06:311
1314039993530,4cyclictest1345799-21kworker/u8:2+flush-8:008:40:511
1314039993529,4cyclictest1345799-21kworker/u8:2+flush-8:011:06:031
1314039993527,5cyclictest1704890-21systemd-journal08:28:321
131403499357,7cyclictest1356429-21diskstats07:50:510
131403499354,3cyclictest0-21swapper/012:20:480
1314034993518,15cyclictest1540442-21sort10:55:550
1314034993517,15cyclictest1339807-21cut07:30:590
1314034993513,19cyclictest1384851-21ntpq08:16:020
14301002340,5sleep3451irq_work/309:01:083
1314042993424,8cyclictest1424717-21ntpq08:56:012
1314039993428,5cyclictest1335728-21kworker/u8:0+flush-8:009:15:491
1314039993427,5cyclictest1588997-21latency_hist11:45:011
1314039993425,6cyclictest1618613-21latency_hist12:15:011
131403499344,4cyclictest0-21swapper/009:45:460
131403499344,4cyclictest0-21swapper/007:15:470
131403499343,4cyclictest0-21swapper/008:30:490
1314039993329,3cyclictest1568886-21kworker/u8:0+flush-8:011:25:521
1314039993329,3cyclictest1313887-21kworker/u8:1+flush-8:007:41:091
1314039993327,5cyclictest1465426-21kworker/u8:1+flush-8:010:36:001
1314039993327,4cyclictest1465426-21kworker/u8:1+flush-8:010:00:501
1314039993327,4cyclictest1464270-21ntpq09:35:591
1314039993327,4cyclictest1464270-21ntpq09:35:591
131403499338,6cyclictest1454321-21/usr/sbin/munin09:25:560
131403499334,3cyclictest0-21swapper/011:45:470
131403499333,3cyclictest0-21swapper/007:35:470
1314034993326,5cyclictest1416011-21apt-get08:50:460
131403499332,11cyclictest1314038-21latency_hist07:10:000
131403499331,9cyclictest1509216-21/usr/sbin/munin10:21:070
131403499331,9cyclictest1465712-21/usr/sbin/munin09:40:490
131403499331,9cyclictest1464471-21/usr/sbin/munin09:36:040
131403499331,9cyclictest1464471-21/usr/sbin/munin09:36:030
1314034993317,14cyclictest1704814-21sshd09:13:330
1314034993316,15cyclictest0-21swapper/012:36:050
1314034993316,15cyclictest0-21swapper/007:45:550
1314034993314,17cyclictest1633050-21unixbench_multi12:26:060
1314034993314,17cyclictest1633050-21unixbench_multi12:26:060
1314034993311,19cyclictest1704890-21systemd-journal11:25:010
1314042993226,4cyclictest1598550-21kworker/u8:3+flush-8:012:30:532
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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