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2026-05-22 - 01:07

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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.

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 rack7slot7s.osadl.org (updated Thu May 21, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1415129684,8sleep00-21swapper/007:08:380
1392729364,9sleep30-21swapper/307:05:453
1422528875,9sleep20-21swapper/207:09:362
1391528665,6sleep10-21swapper/107:05:341
206302630,0sleep30-21swapper/310:53:523
262012480,0sleep20-21swapper/212:14:252
1434399335,27cyclictest0-21swapper/209:13:172
1433699270,27cyclictest0-21swapper/010:53:550
1433999260,26cyclictest0-21swapper/109:36:161
1434399250,0cyclictest0-21swapper/209:27:162
14339992524,1cyclictest0-21swapper/108:05:221
1434899241,0cyclictest0-21swapper/311:15:383
1434899231,1cyclictest55750irq/128-enp2s0-12:11:233
1433999230,22cyclictest0-21swapper/109:55:131
1433699230,21cyclictest0-21swapper/010:37:470
1434899222,15cyclictest1343-21ssh11:40:133
1434899220,1cyclictest55750irq/128-enp2s0-12:08:213
1434399211,4cyclictest0-21swapper/210:01:052
1434399211,4cyclictest0-21swapper/210:01:052
1434399210,2cyclictest0-21swapper/210:17:032
1433999210,20cyclictest0-21swapper/109:10:001
1434899204,5cyclictest141rcu_preempt12:00:003
1434399207,9cyclictest5717-21/usr/sbin/munin10:25:172
1434399200,17cyclictest0-21swapper/212:32:002
1433999200,20cyclictest0-21swapper/111:16:481
1434899190,1cyclictest0-21swapper/309:19:163
14343991917,1cyclictest0-21swapper/211:24:332
1434399190,19cyclictest0-21swapper/210:31:572
1434399190,18cyclictest0-21swapper/209:20:132
1434399190,0cyclictest0-21swapper/211:16:232
14339991917,2cyclictest25-21ksoftirqd/111:41:411
14336991918,1cyclictest0-21swapper/012:34:460
1434899180,1cyclictest0-21swapper/310:36:293
14339991815,2cyclictest0-21swapper/109:25:241
1433999180,4cyclictest0-21swapper/110:13:171
1433999180,18cyclictest0-21swapper/110:46:301
1433999180,16cyclictest0-21swapper/111:54:551
1433999180,16cyclictest0-21swapper/111:54:551
14336991818,0cyclictest0-21swapper/010:57:480
14336991816,1cyclictest13-21ksoftirqd/009:18:060
1434399177,10cyclictest0-21swapper/208:12:312
1434399174,9cyclictest28803-21sendmail07:40:002
1434399170,0cyclictest0-21swapper/211:34:032
14339991716,1cyclictest0-21swapper/111:28:571
1433999171,1cyclictest14645-21mailstats10:30:251
1433999170,1cyclictest0-21swapper/110:05:471
1433999170,1cyclictest0-21swapper/109:44:291
14336991716,0cyclictest13-21ksoftirqd/010:47:480
1433699170,0cyclictest0-21swapper/012:03:150
102502170,0sleep10-21swapper/112:24:101
1434399166,9cyclictest0-21swapper/208:45:272
1434399160,2cyclictest0-21swapper/212:02:422
1434399160,14cyclictest0-21swapper/212:08:382
1433999162,14cyclictest7146-21diskmemload09:51:591
1433999161,13cyclictest0-21swapper/109:22:091
1433999160,1cyclictest14329-21cyclictest12:39:371
1433699168,8cyclictest28914-21apache210:10:590
14336991614,1cyclictest13-21ksoftirqd/009:37:230
1433699161,1cyclictest141rcu_preempt09:52:030
1433699160,1cyclictest0-21swapper/012:20:380
1433699160,16cyclictest0-21swapper/010:34:550
1433699160,0cyclictest0-21swapper/010:29:010
1434899151,1cyclictest8575-21ssh10:45:523
1434899150,15cyclictest0-21swapper/310:33:153
1434899150,12cyclictest0-21swapper/311:47:303
14343991514,0cyclictest0-21swapper/209:56:062
1434399151,1cyclictest4721-21ssh10:05:212
1434399150,2cyclictest0-21swapper/210:39:442
14339991514,1cyclictest7146-21diskmemload10:23:111
14339991513,2cyclictest0-21swapper/111:09:101
1433999150,1cyclictest0-21swapper/112:05:121
1433999150,14cyclictest0-21swapper/110:52:141
1433999150,10cyclictest7146-21diskmemload12:25:211
1433699152,1cyclictest141rcu_preempt09:31:200
1433699151,8cyclictest26661-21sendmail-msp10:00:000
1433699151,0cyclictest141rcu_preempt10:00:300
1433699151,0cyclictest141rcu_preempt10:00:300
14348991411,2cyclictest30628-21wc07:40:253
14348991410,3cyclictest16262-21sed07:10:253
1434899140,2cyclictest0-21swapper/309:45:423
1434899140,14cyclictest0-21swapper/312:34:253
1434899140,13cyclictest0-21swapper/310:41:293
1434399143,10cyclictest9241-21kworker/u8:312:20:122
14343991413,1cyclictest0-21swapper/208:25:132
14343991411,2cyclictest3995-21turbostat12:40:002
14343991411,2cyclictest3767-21cut09:00:202
14343991410,3cyclictest18083-21cron08:25:002
1434399140,7cyclictest0-21swapper/209:05:132
1434399140,1cyclictest0-21swapper/211:50:452
1434399140,1cyclictest0-21swapper/211:50:452
1434399140,13cyclictest0-21swapper/208:00:122
14339991410,3cyclictest11457-21wc11:45:271
1433699148,2cyclictest13-21ksoftirqd/011:09:020
1433699147,6cyclictest9192-21munin-run11:45:000
1433699144,10cyclictest7902-21apt-get11:25:030
1433699141,1cyclictest141rcu_preempt10:41:580
14336991411,2cyclictest13-21ksoftirqd/012:10:130
1433699140,2cyclictest0-21swapper/011:54:180
1433699140,2cyclictest0-21swapper/011:54:170
1433699140,1cyclictest0-21swapper/010:05:500
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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