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2026-06-18 - 18:08

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, 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.

Note that this system runs a non-RT kernel.
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: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackbslot7s.osadl.org (updated Thu Jun 18, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
298362919013,9163sleep124096-21kworker/1:110:02:491
12700237537,3734sleep23243-21kworker/2:209:11:262
12700237537,3734sleep23243-21kworker/2:209:11:262
5666296138,910sleep35719-21ntpq08:47:453
2176029538,933sleep321807-21ntpq09:37:473
12370255617,480sleep312515-21latency_hist07:27:243
1446324227,401sleep314508-21ntpq10:57:473
21608230912,281sleep021704-21latency_hist11:22:230
23155230051,194sleep323212-21latency_hist11:27:223
24772227114,147sleep324898-21latency_hist08:07:243
10033223815,203sleep3194-21jbd2/mmcblk2p2-09:02:393
10033223815,203sleep3194-21jbd2/mmcblk2p2-09:02:393
32549221943,123sleep332637-21grep08:32:233
8649221724,39sleep30-21swapper/312:22:393
8649221724,39sleep30-21swapper/312:22:393
29453221417,183sleep029523-21latency_hist08:22:230
28466220917,127sleep30-21swapper/311:42:453
16186220722,170sleep016268-21systemctl07:37:500
13367220622,47sleep30-21swapper/309:12:443
5950220320,92sleep16084-21unixbench_multi08:47:511
615321986,158sleep00-21swapper/012:12:590
26627219811,147sleep326711-21fschecks_time11:37:403
101821949,109sleep31172-21unixbench_multi08:32:513
101821949,109sleep31172-21unixbench_multi08:32:513
6740219147,95sleep36807-21wc10:32:513
16945219041,123sleep316992-21systemd-run07:42:213
9710218437,109sleep39792-21latency_hist09:02:223
19818217948,15sleep30-21swapper/309:33:073
12648217015,141sleep312714-21fschecks_time07:27:403
19089216618,50sleep35698-21cyclictest11:12:453
22528216520,124sleep122686-21tail11:22:521
9547216443,24sleep30-21swapper/307:17:393
17443216311,16sleep30-21swapper/307:42:423
25098216215,127sleep225155-21fschecks_count08:07:392
16534215943,79sleep315919-21apt-get09:22:493
25556215711,80sleep30-21swapper/311:32:523
22477215319,57sleep30-21swapper/307:57:513
15906215011,98sleep315929-21awk09:22:203
31372214632,102sleep331391-21apt-get11:52:303
451721419,18sleep30-21swapper/308:43:413
6022214023,45sleep30-21swapper/310:32:233
14149214015,109sleep114209-21fschecks_time10:57:411
27905213420,91sleep127972-21fschecks_time09:57:401
362521338,112sleep33659-21ps10:22:543
19152213352,57sleep30-21swapper/307:47:463
5506213113,46sleep30-21swapper/312:12:413
363721249,18sleep30-21swapper/312:07:363
31848212216,86sleep231924-21/usr/sbin/munin08:27:502
1888212223,41sleep30-21swapper/308:37:323
28326211910,94sleep328408-21mailstats09:57:503
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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