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2026-01-06 - 12:20

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 100 highest latencies:
System rackbslot7s.osadl.org (updated Tue Jan 06, 2026 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29329212027,1183sleep128948-21kworker/u8:100:28:241
260428976,879sleep12650-21ntpq23:00:241
20596287621,836sleep320603-21/usr/sbin/munin20:30:183
2490027285,716sleep022944-1kworker/0:0H22:28:450
1183267412,646sleep01219-21ntpq21:10:250
726325558,533sleep17309-21ntpq23:15:261
726325558,533sleep17309-21ntpq23:15:261
1051125277,513sleep019773-1kworker/0:2H21:41:470
687425188,497sleep16919-21awk19:45:251
29236246660,389sleep129381-21tail20:55:321
2924524097,391sleep022944-1kworker/0:0H00:27:390
20227240119,132sleep120245-21modprobe20:30:001
12688234627,307sleep112702-21fschecks_count21:50:211
6618232281,197sleep16705-21latency_hist23:15:021
6618232281,197sleep16705-21latency_hist23:15:021
706229012,226sleep1724-21fschecks_count22:55:191
2240226924,207sleep12286-21ntpq19:30:271
9607226817,211sleep19672-21cpuspeed19:55:191
424422658,215sleep14324-21grep23:05:291
12218223013,202sleep312336-21timerwakeupswit23:30:313
1347222249,202sleep013513-21ntpq23:35:250
30391221917,131sleep10-21swapper/121:00:251
16314221420,145sleep116404-21fschecks_time23:45:191
3721220928,143sleep13863-21sed21:20:031
18830219948,137sleep118872-21cpu22:10:161
31639219065,43sleep10-21swapper/100:35:311
24058218839,84sleep10-21swapper/120:40:221
27475218541,62sleep127594-21timerwakeupswit22:35:321
12404217410,147sleep012541-21latency_hist21:50:030
17280217136,52sleep10-21swapper/122:05:151
5250217014,74sleep10-21swapper/119:40:241
28950217011,142sleep228932-21apt-get00:25:182
5665216541,50sleep15451-21/usr/sbin/munin21:25:251
54921638,140sleep1609-21latency_hist21:10:021
27471216148,96sleep127609-21latency_hist19:10:031
29002216010,95sleep10-21swapper/122:40:331
25346215915,127sleep025494-21latency_hist00:15:020
18728215913,127sleep118852-21latency_hist20:25:031
26743215810,88sleep10-21swapper/120:50:031
26743215810,88sleep10-21swapper/120:50:031
20641215622,81sleep10-21swapper/120:30:201
8843215130,42sleep10-21swapper/121:35:221
22219215047,60sleep10-21swapper/100:05:021
12849214828,50sleep10-21swapper/123:35:011
15246214545,51sleep10-21swapper/123:40:301
15246214545,51sleep10-21swapper/123:40:301
11073214219,105sleep211261-21fw_packets21:45:452
27325214138,77sleep227327-21cron19:10:002
26981214118,37sleep10-21swapper/120:50:151
23304214019,40sleep10-21swapper/122:25:021
24205213875,17sleep10-21swapper/100:10:191
4639213659,62sleep14680-21sendmail19:40:001
749213232,86sleep1813-21ps19:25:301
14220213041,19sleep10-21swapper/121:55:171
14220213041,19sleep10-21swapper/121:55:171
21193212315,18sleep00-21swapper/020:30:310
10667212218,82sleep00-21swapper/023:25:310
7109211817,82sleep27124-21cut21:30:182
27147211815,90sleep027200-21cpuspeed00:20:150
31810211314,81sleep331933-21timerwakeupswit00:35:333
3089521109,87sleep131038-21date00:35:031
27314211044,42sleep10-21swapper/100:20:211
15950210913,77sleep016019-21fschecks_time20:15:210
20652210658,14sleep10-21swapper/100:00:011
23029210513,37sleep10-21swapper/100:05:301
23029210513,37sleep10-21swapper/100:05:301
22213210519,70sleep10-21swapper/120:35:041
22213210519,70sleep10-21swapper/120:35:041
24611210413,76sleep324685-21/usr/sbin/munin00:10:293
31153210313,18sleep30-21swapper/319:20:113
32253210211,77sleep232254-21sshd00:38:152
9364210146,37sleep10-21swapper/119:55:021
29868210111,68sleep10-21swapper/119:15:241
29868210111,68sleep10-21swapper/119:15:241
1849521017,81sleep118628-21grep23:50:321
16302210130,59sleep116339-21ps20:15:301
1473621017,75sleep10-21swapper/120:10:291
1473621017,75sleep10-21swapper/120:10:291
11034210144,18sleep10-21swapper/121:45:441
781629818,59sleep27863-21grep19:50:022
2765529821,12sleep10-21swapper/119:10:151
2765529821,12sleep10-21swapper/119:10:151
2413629715,66sleep224183-21ntp_kernel_pll_22:25:272
205129715,63sleep32082-21munin-run21:15:013
806829610,70sleep10-21swapper/121:32:151
48429614,67sleep3512-21awk21:10:003
3065329618,59sleep230781-21unixbench_multi22:45:312
1385529511,20sleep10-21swapper/120:08:151
866029313,65sleep08760-21timerandwakeup19:50:290
573029317,56sleep24932-21/usr/sbin/munin19:40:342
3151829312,16sleep00-21swapper/022:50:130
1496929221,48sleep215108-21tail20:10:342
1496929221,48sleep215108-21tail20:10:342
1117729218,57sleep10-21swapper/120:00:151
84442918,17sleep10-21swapper/123:20:151
602529112,65sleep26088-21swap21:25:342
252632918,17sleep10-21swapper/122:30:111
117702907,16sleep10-21swapper/121:46:011
135152897,15sleep10-21swapper/123:35:261
2449728827,14sleep10-21swapper/122:26:351
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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