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2026-05-06 - 18:35

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

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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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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackcslot7s.osadl.org (updated Wed May 06, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
258866021030,3sleep13056-21PK-Backend12:00:121
24977842990,4sleep33056-21PK-Backend07:40:193
139099760,60rtkit-daemon0-21swapper/307:08:563
248532626546,13sleep20-21swapper/207:07:542
248521026540,19sleep00-21swapper/007:06:230
248529826344,14sleep10-21swapper/107:07:331
25689952510,15sleep20-21swapper/211:05:122
25432512500,3sleep00-21swapper/009:50:160
139099380,3rtkit-daemon3056-21PK-Backend09:26:093
139099380,3rtkit-daemon3056-21PK-Backend09:10:273
139099370,3rtkit-daemon3056-21PK-Backend09:32:063
139099370,3rtkit-daemon3056-21PK-Backend08:58:493
139099370,3rtkit-daemon3056-21PK-Backend07:32:323
139099370,3rtkit-daemon0-21swapper/311:02:453
139099360,3rtkit-daemon3056-21PK-Backend09:48:343
139099350,3rtkit-daemon3056-21PK-Backend10:00:343
25028312340,4sleep13056-21PK-Backend07:55:131
25994952270,4chrt3056-21PK-Backend12:30:161
248564499278,10cyclictest13-21ksoftirqd/011:24:590
24951182260,3sleep2331rcuc/207:35:012
248565499250,23cyclictest2579798-21cstates11:35:143
248564499256,10cyclictest13-21ksoftirqd/011:35:000
248564499256,10cyclictest13-21ksoftirqd/011:35:000
24989132240,3sleep30-21swapper/307:45:123
2485650992411,11cyclictest2600410-21unin-run12:35:012
2485644992412,7cyclictest2583754-21cat11:45:150
248564499240,6cyclictest3056-21PK-Backend11:26:150
248565499230,21cyclictest2600387-21/usr/sbin/munin12:35:003
2485650992311,10cyclictest2561469-21unin-run10:45:002
2485650992311,10cyclictest2520207-21diskstats08:45:132
248564499239,13cyclictest2568402-21unin-run11:05:000
248564499232,9cyclictest13-21ksoftirqd/010:50:190
2485644992321,1cyclictest0-21swapper/010:03:370
2485644992318,4cyclictest13-21ksoftirqd/011:15:010
2485654992220,1cyclictest0-21swapper/308:37:233
2485654992220,1cyclictest0-21swapper/308:37:233
2485654992220,1cyclictest0-21swapper/307:50:583
248565499220,21cyclictest0-21swapper/311:23:373
2485650992214,6cyclictest2489020-21ntp_kernel_err07:15:192
2485648992219,2cyclictest3056-21PK-Backend10:10:011
2485648992213,7cyclictest2591711-21grep12:10:001
248564899220,20cyclictest3056-21PK-Backend11:36:391
2485644992220,1cyclictest0-21swapper/012:26:480
2485644992220,1cyclictest0-21swapper/012:26:480
2485644992220,1cyclictest0-21swapper/010:48:530
2485644992220,1cyclictest0-21swapper/008:34:360
2485644992220,1cyclictest0-21swapper/008:13:060
2485644992220,1cyclictest0-21swapper/007:16:350
2485644992218,3cyclictest161rcuc/009:44:160
2485644992218,3cyclictest161rcuc/009:13:010
2485644992214,6cyclictest2502632-21cpuspeed_turbos07:55:110
2485654992119,1cyclictest3056-21PK-Backend09:54:423
2485654992119,1cyclictest0-21swapper/311:59:333
2485654992119,1cyclictest0-21swapper/310:57:213
2485654992119,1cyclictest0-21swapper/310:50:593
2485654992119,1cyclictest0-21swapper/310:10:023
2485654992118,2cyclictest0-21swapper/312:25:163
2485654992118,2cyclictest0-21swapper/312:25:163
2485654992118,2cyclictest0-21swapper/311:50:543
248565499211,7cyclictest2490793-21ntpq07:20:193
248565499211,5cyclictest2595170-21perf12:19:593
248565499210,20cyclictest4176944-21snapd12:09:143
248565499210,20cyclictest0-21swapper/310:20:583
248565499210,20cyclictest0-21swapper/310:05:503
248565499210,20cyclictest0-21swapper/308:09:583
248565499210,20cyclictest0-21swapper/307:14:073
2485650992114,6cyclictest1-21systemd11:40:002
2485648992119,1cyclictest3056-21PK-Backend10:43:051
2485648992119,1cyclictest3056-21PK-Backend10:37:321
2485648992119,1cyclictest3056-21PK-Backend10:37:321
2485648992119,1cyclictest3056-21PK-Backend08:34:291
2485648992119,1cyclictest3056-21PK-Backend07:24:321
2485648992119,1cyclictest0-21swapper/109:59:461
2485648992119,1cyclictest0-21swapper/109:32:081
2485648992119,1cyclictest0-21swapper/109:19:521
2485648992119,1cyclictest0-21swapper/107:45:001
2485648992119,1cyclictest0-21swapper/107:30:421
248564899210,19cyclictest3056-21PK-Backend11:10:361
248564499214,7cyclictest13-21ksoftirqd/009:00:190
248564499213,6cyclictest13-21ksoftirqd/012:05:150
248564499213,10cyclictest13-21ksoftirqd/011:50:190
2485644992119,1cyclictest0-21swapper/012:03:230
2485644992119,1cyclictest0-21swapper/010:35:290
2485644992119,1cyclictest0-21swapper/010:35:280
2485644992119,1cyclictest0-21swapper/009:31:540
2485644992119,1cyclictest0-21swapper/009:28:570
2485644992119,1cyclictest0-21swapper/008:59:160
2485644992119,1cyclictest0-21swapper/008:42:130
2485644992119,1cyclictest0-21swapper/008:25:020
2485644992119,1cyclictest0-21swapper/007:49:200
2485644992116,4cyclictest13-21ksoftirqd/011:16:030
2485644992115,4cyclictest13-21ksoftirqd/010:00:010
2485644992110,3cyclictest13-21ksoftirqd/011:35:120
248564499210,20cyclictest0-21swapper/010:57:180
248564499210,20cyclictest0-21swapper/008:00:150
25976052200,4chrt3056-21PK-Backend12:25:141
25976052200,4chrt3056-21PK-Backend12:25:141
25620992200,4chrt0-21swapper/210:45:162
2485654992018,1cyclictest0-21swapper/312:12:313
2485654992018,1cyclictest0-21swapper/311:32:573
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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