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2026-08-21 - 07:30

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #5

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 50 highest latencies:
System rackeslot5s.osadl.org (updated Fri Aug 21, 2026 00:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2309899270,0cyclictest0-21swapper/221:20:152
2309899270,0cyclictest0-21swapper/221:15:192
2309899260,5cyclictest18770-21ssh21:40:032
2309899260,25cyclictest21229-21ssh23:35:412
2309899260,25cyclictest14118-21ssh21:35:182
2309899260,25cyclictest0-21swapper/222:43:212
2309899260,0cyclictest0-21swapper/221:10:022
2309899260,0cyclictest0-21swapper/200:20:212
23091992624,1cyclictest0-21swapper/022:03:070
2310399250,24cyclictest26331-21ssh23:12:153
2310399250,24cyclictest16329-21diskmemload22:13:183
2310399250,24cyclictest0-21swapper/323:04:083
2309899250,24cyclictest25137-21ssh23:10:372
2309899250,24cyclictest10558-21sh23:26:572
2309899250,24cyclictest0-21swapper/223:20:152
2309899250,1cyclictest20231-21ssh23:06:432
2309899250,0cyclictest0-21swapper/222:00:202
2309399254,3cyclictest27297-21wc20:25:001
2309399250,24cyclictest16329-21diskmemload00:35:321
23091992523,1cyclictest32560-21cat00:15:150
2309199250,24cyclictest9722-21ssh00:24:000
2309199250,24cyclictest0-21swapper/023:46:370
23103992424,0cyclictest0-21swapper/323:25:443
23103992422,2cyclictest14981-21apt-get20:00:143
23103992421,2cyclictest16329-21diskmemload22:25:153
2310399240,24cyclictest0-21swapper/322:55:153
2310399240,23cyclictest19403-21ssh23:05:343
23098992420,3cyclictest0-21swapper/222:21:472
23098992419,4cyclictest23632-21ssh00:06:372
23098992419,4cyclictest16329-21diskmemload00:29:202
2309899240,23cyclictest29485-21ssh00:11:532
2309899240,23cyclictest16329-21diskmemload22:37:502
2309899240,23cyclictest0-21swapper/223:17:232
2309899240,1cyclictest6018-21ssh23:51:082
2309899240,1cyclictest25714-21apt-get19:15:132
2309899240,1cyclictest15787-21ssh23:03:232
2309899240,0cyclictest0-21swapper/223:46:272
2309899240,0cyclictest0-21swapper/222:58:492
23093992424,0cyclictest0-21swapper/123:46:031
23093992422,2cyclictest30980-21irqstats21:50:191
23093992422,1cyclictest313-21systemd-journal21:20:001
23093992422,1cyclictest0-21swapper/121:20:211
2309399242,1cyclictest16329-21diskmemload21:46:081
2309399240,24cyclictest0-21swapper/123:44:131
2309399240,24cyclictest0-21swapper/121:42:121
2309399240,24cyclictest0-21swapper/100:06:371
2309399240,23cyclictest13930-21cron21:05:011
2309399240,23cyclictest0-21swapper/123:36:431
2309399240,1cyclictest16329-21diskmemload22:48:451
2309399240,0cyclictest0-21swapper/100:18:051
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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