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2026-10-21 - 01:06

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 Tue Oct 20, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23811210778,9sleep20-21swapper/207:06:512
2372529465,9sleep30-21swapper/307:05:443
2392629077,9sleep00-21swapper/007:08:230
2377828667,15sleep10-21swapper/107:06:271
2415699251,23cyclictest0-21swapper/311:50:133
24148992517,5cyclictest13-21ksoftirqd/011:01:460
2415099231,21cyclictest29341-21diskstats12:30:161
24156992221,1cyclictest0-21swapper/307:58:423
24156992121,0cyclictest0-21swapper/312:21:143
2415499210,21cyclictest0-21swapper/210:59:552
24150992121,0cyclictest0-21swapper/111:22:301
2414899211,3cyclictest0-21swapper/009:16:200
2415699200,1cyclictest0-21swapper/309:26:143
2415099200,0cyclictest0-21swapper/109:39:201
2414899200,3cyclictest0-21swapper/012:18:010
2414899200,0cyclictest0-21swapper/009:21:510
24156991915,3cyclictest39-21ksoftirqd/312:17:223
2415699190,19cyclictest0-21swapper/312:28:393
2415099190,19cyclictest0-21swapper/110:22:091
2414899195,7cyclictest18161-21munin-run08:04:590
74462180,1sleep00-21swapper/011:57:570
2415099180,18cyclictest0-21swapper/112:23:371
2415699170,15cyclictest0-21swapper/310:55:213
2415699170,13cyclictest0-21swapper/308:40:173
2415499174,8cyclictest15737-21apt-get11:05:142
2415499170,4cyclictest0-21swapper/210:34:562
24150991717,0cyclictest0-21swapper/110:45:441
24150991716,0cyclictest0-21swapper/111:40:391
2415099171,2cyclictest0-21swapper/111:49:351
24148991715,2cyclictest0-21swapper/012:33:500
2414899170,1cyclictest0-21swapper/012:03:350
2415699160,16cyclictest0-21swapper/310:08:223
2415699160,16cyclictest0-21swapper/310:08:213
2415499162,13cyclictest16958-21diskmemload12:19:482
2415499160,15cyclictest0-21swapper/212:14:512
24150991615,1cyclictest0-21swapper/111:36:401
2415099161,1cyclictest141rcu_preempt09:31:151
2415099160,1cyclictest0-21swapper/110:38:241
2415099160,15cyclictest0-21swapper/110:10:151
2414899164,6cyclictest2325-21awk09:39:590
24156991515,0cyclictest0-21swapper/309:50:583
24156991514,1cyclictest0-21swapper/311:38:073
2415699150,15cyclictest0-21swapper/310:27:073
24154991515,0cyclictest0-21swapper/209:19:262
2415499151,2cyclictest0-21swapper/210:35:302
2415099151,9cyclictest225-21systemd-journal07:34:591
2415099150,15cyclictest0-21swapper/110:43:501
2414899153,11cyclictest17508-21ssh09:10:150
2414899150,1cyclictest141rcu_preempt11:17:550
2415699146,5cyclictest6318-21apt-get10:40:133
24156991413,1cyclictest0-21swapper/310:30:073
24156991411,2cyclictest6985-21grep08:45:273
24156991411,2cyclictest6985-21grep08:45:263
24156991411,2cyclictest31102-21wc10:54:593
24156991410,3cyclictest3153-21ntpq09:20:223
24156991410,3cyclictest20546-21dpkg08:09:593
24156991410,2cyclictest12567-21cut09:00:133
2415699140,13cyclictest0-21swapper/310:45:553
2415699140,12cyclictest21161-21sh10:10:143
2415699140,12cyclictest0-21swapper/311:34:323
24154991411,2cyclictest20860-21grep12:05:262
24154991410,2cyclictest20919-21grep10:10:142
2415499140,12cyclictest0-21swapper/209:05:142
2415499140,0cyclictest0-21swapper/210:01:012
2415099142,12cyclictest16958-21diskmemload10:54:291
24150991413,1cyclictest25-21ksoftirqd/111:06:211
24150991410,3cyclictest5596-21cut08:45:161
24150991410,3cyclictest5596-21cut08:45:151
24150991410,3cyclictest28666-21grep07:15:271
24150991410,3cyclictest20812-21sed08:10:011
24150991410,2cyclictest18148-21cron08:05:001
2415099140,14cyclictest30581-21/usr/sbin/munin07:20:201
2415099140,14cyclictest0-21swapper/110:29:591
2414899146,6cyclictest0-21swapper/011:50:150
2414899144,9cyclictest28601-21apache207:35:120
24148991410,2cyclictest26503-21grep08:20:170
2414899140,1cyclictest0-21swapper/010:16:380
24156991311,1cyclictest0-21swapper/310:39:553
24156991310,2cyclictest28172-21head12:10:193
24156991310,2cyclictest26693-21cron07:15:013
2415699130,3cyclictest0-21swapper/311:13:493
24154991313,0cyclictest0-21swapper/212:32:032
24154991310,2cyclictest2848-21grep07:30:202
24154991310,2cyclictest14291-21tune2fs07:55:172
24154991310,2cyclictest12205-21readlink09:00:012
24154991310,2cyclictest12086-21aten2_r7power_p12:20:152
2415499130,13cyclictest0-21swapper/209:50:572
2415099139,3cyclictest13201-21awk09:45:271
2415099137,5cyclictest9593-21sshd08:52:261
24150991313,0cyclictest0-21swapper/112:36:151
2415099131,11cyclictest519-21ssh11:54:051
2415099131,11cyclictest13966-21cstates07:55:151
2415099130,13cyclictest0-21swapper/112:00:531
2414899139,3cyclictest28512-21cat09:55:150
2414899139,3cyclictest24934-21sed10:50:270
2414899139,3cyclictest19551-21tr08:05:210
2414899139,2cyclictest3433-21tail07:30:260
2414899139,2cyclictest1336-21grep08:35:200
2414899132,6cyclictest28650-21munin-run10:15:010
2414899131,6cyclictest23125-21munin-run08:14:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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