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2026-06-04 - 20:48

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 Thu Jun 04, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24051292910,3chrt0-21swapper/011:00:410
24954302840,3chrt75-21kworker/3:1-events12:30:403
2173304996358,3cyclictest2205225-21kworker/u8:2+events_unbound09:50:500
2173304996254,6cyclictest2244829-21/usr/sbin/munin08:20:510
2173312996140,17cyclictest2218989-21ntpq07:50:491
2173312996051,7cyclictest2417793-21ntpq11:10:451
2173312995950,6cyclictest2384093-21latency_hist10:40:011
2173312995950,6cyclictest2384093-21latency_hist10:40:001
2173304995754,2cyclictest2369251-21kworker/u8:1+events_unbound10:41:540
2173312995538,14cyclictest2422975-21ntpq11:15:451
2173312995448,4cyclictest2487899-21ntpq12:20:491
2173304995446,6cyclictest2294233-21apt-get09:10:010
2173304995349,3cyclictest2234881-21kworker/u8:0+events_unbound09:45:510
2173312995241,8cyclictest2358225-21ntpq10:10:451
2173312995236,13cyclictest2248615-21ntpq08:20:461
2173312995233,12cyclictest161rcu_preempt10:00:421
2173304995249,2cyclictest2483970-21kworker/u8:3+events_unbound12:30:500
2173304995148,2cyclictest2030499-21kworker/u8:1+events_unbound07:25:490
2173318995031,16cyclictest2289045-21apt-get09:05:012
2173312995029,17cyclictest1704890-21systemd-journal09:30:501
2173304995046,3cyclictest2438721-21kworker/u8:1+events_unbound11:45:370
2173304994946,2cyclictest2468946-21kworker/u8:1+events_unbound12:15:540
2173304994945,3cyclictest2224789-21kworker/u8:3+events_unbound08:30:350
2173304994844,3cyclictest2224789-21kworker/u8:3+events_unbound09:34:510
2173304994844,3cyclictest2205225-21kworker/u8:2+events_unbound09:15:360
2173304994840,6cyclictest2468963-21/usr/sbin/munin12:05:460
2173304994840,6cyclictest2468963-21/usr/sbin/munin12:05:450
2173304994743,3cyclictest2234881-21kworker/u8:0+events_unbound09:27:510
2173304994739,3cyclictest2030499-21kworker/u8:1+events_unbound07:48:500
2173318994529,14cyclictest2199216-21ntpq07:30:502
2173304994542,2cyclictest2454036-21kworker/u8:0+events_unbound12:00:530
2173304994540,4cyclictest2418370-21kworker/u8:0+events_unbound11:29:510
2173318994437,4cyclictest1704890-21systemd-journal12:00:002
2173318994429,13cyclictest1704890-21systemd-journal12:10:002
2173318994429,13cyclictest1704890-21systemd-journal12:10:002
2173304994441,2cyclictest2205225-21kworker/u8:2+events_unbound10:00:570
2173304994440,3cyclictest2224789-21kworker/u8:3+events_unbound10:39:520
2173304994440,3cyclictest2224789-21kworker/u8:3+events_unbound10:39:510
2173304994440,3cyclictest2205225-21kworker/u8:2+events_unbound09:00:360
2173304994440,3cyclictest1341629-21kworker/u8:4+events_unbound07:35:200
2173312994316,15cyclictest0-21swapper/111:35:501
217331299431,29cyclictest589-21runrttasks08:15:351
2173304994339,3cyclictest2454036-21kworker/u8:0+events_unbound12:10:360
2173304994339,3cyclictest2205225-21kworker/u8:2+events_unbound07:54:520
2173312994234,6cyclictest2428887-21latency_hist11:25:011
2173304994238,3cyclictest2438721-21kworker/u8:1+events_unbound11:33:510
2173304994238,3cyclictest2369251-21kworker/u8:1+events_unbound11:15:050
2173304994238,3cyclictest2234881-21kworker/u8:0+events_unbound08:25:550
2173304994238,3cyclictest1340637-21kworker/u8:0+events_unbound07:20:180
2173304994238,3cyclictest1340637-21kworker/u8:0+events_unbound07:20:180
2173304994233,7cyclictest2503756-21latency_hist12:40:010
2173312994137,3cyclictest2224789-21kworker/u8:3+flush-8:010:20:531
2173304994138,2cyclictest2454036-21kworker/u8:0+events_unbound12:21:520
2173304994138,2cyclictest2030499-21kworker/u8:1+events_unbound07:10:550
2173304994137,3cyclictest2224789-21kworker/u8:3+events_unbound10:12:520
2173304994137,3cyclictest1340637-21kworker/u8:0+events_unbound07:16:510
2173304994134,5cyclictest2418719-21apt-get11:15:010
2173304994133,6cyclictest2263430-21ntpq08:35:460
2173312994031,7cyclictest1704890-21systemd-journal07:20:501
2173312994031,7cyclictest1704890-21systemd-journal07:20:501
2173304994036,3cyclictest2224789-21kworker/u8:3+events_unbound10:05:390
2173304994036,3cyclictest2224789-21kworker/u8:3+events_unbound09:57:510
2173304994036,3cyclictest2205225-21kworker/u8:2+events_unbound07:57:520
2173312993927,9cyclictest1704890-21systemd-journal09:41:501
2173312993924,13cyclictest2227214-21kthreadcore08:00:441
217331299391,23cyclictest2274192-21runrttasks08:49:341
217331299391,22cyclictest2363737-21runrttasks10:16:101
217331299391,22cyclictest2220046-21runrttasks07:55:131
217331299391,21cyclictest2373983-21apt-key10:29:591
217331299390,24cyclictest2284609-21taskset09:00:361
2173304993935,3cyclictest2205225-21kworker/u8:2+events_unbound09:24:500
2173318993822,14cyclictest0-21swapper/212:35:002
2173312993828,6cyclictest1704890-21systemd-journal09:26:501
2173312993825,11cyclictest2433817-21apt-key11:30:001
217331299381,20cyclictest2230377-21sort08:05:411
217331299380,29cyclictest2299173-21taskset09:12:131
217331299380,23cyclictest2448610-21runrttasks11:41:441
217331299380,23cyclictest2354159-21runrttasks10:09:561
217331299380,22cyclictest2408795-21runrttasks11:04:331
2173304993834,3cyclictest2424154-21kworker/u8:2+events_unbound11:50:530
2173304993834,3cyclictest2234881-21kworker/u8:0+events_unbound10:23:490
2173304993834,3cyclictest2234881-21kworker/u8:0+events_unbound08:48:520
2173304993834,3cyclictest2224789-21kworker/u8:3+events_unbound11:41:140
2173304993834,3cyclictest2224789-21kworker/u8:3+events_unbound10:31:500
2173304993834,3cyclictest2224789-21kworker/u8:3+events_unbound10:15:580
2173304993834,3cyclictest2205225-21kworker/u8:2+events_unbound08:58:510
2173304993834,3cyclictest2030499-21kworker/u8:1+events_unbound08:05:340
2173318993730,5cyclictest1704890-21systemd-journal11:45:492
2173312993730,5cyclictest2210235-21apt-get07:45:331
2173312993728,6cyclictest1704890-21systemd-journal07:15:011
2173312993727,7cyclictest2205522-21diskstats07:40:351
217331299371,21cyclictest2283970-21runrttasks08:59:011
217331299371,20cyclictest2388277-21runrttasks10:40:541
217331299371,17cyclictest2438673-21runrttasks11:31:261
217331299370,27cyclictest2378952-21taskset10:32:351
217331299370,24cyclictest2483425-21runrttasks12:19:291
217331299370,22cyclictest2468480-21runrttasks12:02:201
217331299370,22cyclictest2304166-21runrttasks09:17:391
217331299370,22cyclictest2294148-21runrttasks09:09:071
217331299370,21cyclictest2184870-21runrttasks07:16:311
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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