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2026-09-04 - 05:42

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 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 rackeslot5s.osadl.org (updated Fri Sep 04, 2026 00:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10098992519,2cyclictest17902-21rm23:16:392
1009899250,1cyclictest25887-21ssh23:53:172
1009399250,24cyclictest0-21swapper/100:17:101
1009299250,24cyclictest0-21swapper/021:52:180
10100992424,0cyclictest0-21swapper/322:29:323
10100992423,1cyclictest32730-21ssh00:27:433
1010099240,23cyclictest5213-21sh21:39:193
1010099240,0cyclictest0-21swapper/323:19:093
10098992420,3cyclictest0-21swapper/222:50:162
1009899240,24cyclictest0-21swapper/223:59:112
1009899240,24cyclictest0-21swapper/222:17:172
1009899240,23cyclictest32127-21idleruntime-cro21:35:002
1009899240,23cyclictest150982sleep223:44:172
10093992423,1cyclictest0-21swapper/121:16:541
10093992422,1cyclictest0-21swapper/122:09:021
1009399240,24cyclictest0-21swapper/100:01:051
1009399240,23cyclictest12388-21cron22:15:011
1009399240,0cyclictest0-21swapper/121:48:361
10092992423,1cyclictest0-21swapper/000:27:110
10092992423,0cyclictest0-21swapper/021:34:160
1009299240,23cyclictest3686-21diskmemload23:16:450
1009299240,23cyclictest2498-21munin-run22:35:000
1009299240,23cyclictest12191-21if_err_eno123:41:300
1009299240,23cyclictest0-21swapper/022:47:050
1009299240,23cyclictest0-21swapper/021:41:360
1009299240,1cyclictest3686-21diskmemload22:24:500
10100992323,0cyclictest0-21swapper/323:34:073
10100992323,0cyclictest0-21swapper/322:48:313
10100992323,0cyclictest0-21swapper/300:23:053
10100992321,1cyclictest9327-21apt-get22:41:253
10100992321,1cyclictest0-21swapper/321:48:073
1010099231,1cyclictest12068-21rm22:14:283
1010099230,2cyclictest31716-21runrttasks22:02:153
1010099230,23cyclictest3686-21diskmemload21:55:023
1010099230,23cyclictest25631-21sh21:29:043
1010099230,23cyclictest0-21swapper/323:29:353
1010099230,23cyclictest0-21swapper/322:50:443
1010099230,22cyclictest9886-21ssh23:10:483
1010099230,22cyclictest8566-21sh23:38:023
1010099230,22cyclictest5750-21ssh00:04:153
1010099230,22cyclictest3686-21diskmemload23:03:023
1010099230,22cyclictest15245-21ssh23:44:283
1010099230,0cyclictest0-21swapper/300:14:083
10098992323,0cyclictest3686-21diskmemload00:08:032
10098992323,0cyclictest0-21swapper/222:10:082
10098992321,0cyclictest0-21swapper/222:21:232
10098992318,4cyclictest0-21swapper/222:05:052
1009899231,21cyclictest28-21ksoftirqd/220:15:002
1009899230,2cyclictest13590-21ssh21:17:452
1009899230,23cyclictest3686-21diskmemload23:05:312
1009899230,23cyclictest0-21swapper/223:48:542
1009899230,23cyclictest0-21swapper/223:38:092
1009899230,23cyclictest0-21swapper/223:13:442
1009899230,23cyclictest0-21swapper/222:31:502
1009899230,23cyclictest0-21swapper/222:04:452
1009899230,23cyclictest0-21swapper/221:59:022
1009899230,22cyclictest2822-21apt-get20:01:252
1009899230,22cyclictest27841-21ssh22:56:552
1009899230,22cyclictest24061-21ssh23:22:312
1009899230,22cyclictest23453-21ssh00:20:342
1009899230,22cyclictest21186-21ssh00:17:432
1009899230,22cyclictest16144-21ssh21:20:592
1009899230,22cyclictest1261-21ssh23:02:172
1009899230,22cyclictest0-21swapper/222:45:362
1009899230,1cyclictest12158-21ssh22:42:562
1009899230,0cyclictest0-21swapper/200:30:142
10093992323,0cyclictest3686-21diskmemload21:30:411
10093992323,0cyclictest0-21swapper/123:31:381
10093992323,0cyclictest0-21swapper/123:00:311
10093992323,0cyclictest0-21swapper/100:05:341
10093992322,1cyclictest0-21swapper/121:54:551
10093992321,1cyclictest0-21swapper/100:11:551
1009399230,2cyclictest25267-21apt19:40:011
1009399230,23cyclictest0-21swapper/123:37:481
1009399230,23cyclictest0-21swapper/122:45:101
1009399230,23cyclictest0-21swapper/122:26:021
1009399230,22cyclictest3713-21perf21:10:001
1009399230,22cyclictest3686-21diskmemload21:40:561
1009399230,22cyclictest3686-21diskmemload21:23:381
1009399230,22cyclictest0-21swapper/123:42:191
1009399230,22cyclictest0-21swapper/123:09:451
1009399230,22cyclictest0-21swapper/122:50:091
1009399230,22cyclictest0-21swapper/122:20:551
1009399230,22cyclictest0-21swapper/121:38:251
1009399230,22cyclictest0-21swapper/100:20:241
1009399230,0cyclictest0-21swapper/123:55:081
1009399230,0cyclictest0-21swapper/123:48:581
1009399230,0cyclictest0-21swapper/123:11:111
1009399230,0cyclictest0-21swapper/122:35:401
1009399230,0cyclictest0-21swapper/121:25:031
1009399230,0cyclictest0-21swapper/121:11:361
1009399230,0cyclictest0-21swapper/120:21:241
1009399230,0cyclictest0-21swapper/120:21:241
1009399230,0cyclictest0-21swapper/100:37:331
1009399230,0cyclictest0-21swapper/100:30:121
1009399230,0cyclictest0-21swapper/100:28:191
10092992323,0cyclictest3686-21diskmemload22:43:190
10092992323,0cyclictest0-21swapper/021:13:380
10092992323,0cyclictest0-21swapper/000:16:460
10092992322,1cyclictest62550irq/127-eno122:03:090
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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