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2026-04-06 - 18:32

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 Mon Apr 06, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
692028975,9sleep00-21swapper/007:07:110
702428572,9sleep20-21swapper/207:08:342
686428467,13sleep10-21swapper/107:06:271
684128067,9sleep30-21swapper/307:06:103
723999250,4cyclictest0-21swapper/110:12:161
723699250,1cyclictest0-21swapper/011:57:370
7236992423,1cyclictest0-21swapper/010:28:020
7239992322,1cyclictest25-21ksoftirqd/110:34:471
7239992219,2cyclictest29082-21grep10:05:161
7239992214,4cyclictest0-21swapper/111:45:221
7236992222,0cyclictest0-21swapper/010:44:290
723699220,0cyclictest0-21swapper/012:23:440
193712220,0sleep30-21swapper/312:34:523
723999212,2cyclictest25-21ksoftirqd/111:31:121
7239992118,1cyclictest0-21swapper/111:17:521
723999210,3cyclictest0-21swapper/109:31:231
723999210,2cyclictest0-21swapper/110:01:231
723699210,18cyclictest0-21swapper/009:17:490
7246992020,0cyclictest0-21swapper/311:20:383
723999205,15cyclictest25-21ksoftirqd/110:26:111
723999200,2cyclictest0-21swapper/112:27:361
723699202,1cyclictest141rcu_preempt09:47:160
723999198,5cyclictest25-21ksoftirqd/109:45:441
723699190,1cyclictest0-21swapper/009:34:210
7246991812,4cyclictest0-21swapper/309:10:173
724699180,1cyclictest0-21swapper/309:52:403
724699180,17cyclictest0-21swapper/312:07:053
724299180,1cyclictest0-21swapper/209:55:042
724299180,17cyclictest0-21swapper/209:35:132
723999188,9cyclictest0-21swapper/109:50:171
723999183,13cyclictest241rcuc/109:24:151
7239991818,0cyclictest25-21ksoftirqd/112:33:431
7239991816,2cyclictest0-21swapper/112:05:141
723999180,1cyclictest0-21swapper/110:23:561
723999180,17cyclictest0-21swapper/109:12:051
723699187,6cyclictest1852-21perf12:05:000
7236991817,1cyclictest0-21swapper/009:11:080
723699180,14cyclictest0-21swapper/011:11:300
291712180,1sleep00-21swapper/010:05:180
7246991717,0cyclictest0-21swapper/311:40:073
724699170,1cyclictest0-21swapper/310:21:423
724699170,17cyclictest0-21swapper/312:18:073
724299170,15cyclictest0-21swapper/209:23:372
723999173,3cyclictest141rcu_preempt10:15:041
7239991713,4cyclictest25-21ksoftirqd/111:43:101
723999170,1cyclictest0-21swapper/111:35:211
7236991715,1cyclictest411-21diskmemload12:08:020
723699170,3cyclictest0-21swapper/012:13:200
723699170,1cyclictest0-21swapper/010:54:110
724699164,4cyclictest225-21systemd-journal11:55:003
7246991616,0cyclictest0-21swapper/311:34:343
724699161,2cyclictest141rcu_preempt12:20:363
724699160,5cyclictest0-21swapper/310:17:533
723999167,7cyclictest25-21ksoftirqd/112:15:181
723999166,9cyclictest31873-21df_abs11:05:141
7239991615,0cyclictest0-21swapper/109:27:241
7239991613,2cyclictest241rcuc/109:44:371
7239991612,4cyclictest0-21swapper/111:50:371
723699164,6cyclictest20431-21perf10:20:000
723699163,6cyclictest11059-21latency_hist09:55:010
723699160,15cyclictest0-21swapper/008:30:130
724699151,6cyclictest14340-21fschecks_count10:35:173
7242991514,1cyclictest0-21swapper/209:15:482
724299150,7cyclictest225-21systemd-journal11:13:402
724299150,15cyclictest0-21swapper/210:47:182
724299150,15cyclictest0-21swapper/209:25:512
723999152,12cyclictest13662-21ssh10:35:141
7239991512,2cyclictest16092-21runrttasks09:57:261
7239991511,4cyclictest411-21diskmemload10:58:251
7239991510,2cyclictest225-21systemd-journal07:22:391
723999150,0cyclictest0-21swapper/111:28:491
723699158,4cyclictest13-21ksoftirqd/008:25:210
723699156,7cyclictest411-21diskmemload11:40:040
723699150,1cyclictest0-21swapper/012:30:480
724699149,5cyclictest31270-21apache209:41:163
724699149,3cyclictest29637-21wc09:00:213
724699142,11cyclictest12065-21ssh12:10:203
724699141,0cyclictest0-21swapper/311:07:223
724699140,13cyclictest0-21swapper/310:56:273
724299143,5cyclictest225-21systemd-journal10:59:552
724299143,10cyclictest14946-21ntp_states10:35:212
724299141,8cyclictest26652-21cpuspeed_turbos12:00:142
7242991413,1cyclictest55650irq/127-enp2s0-10:50:342
7242991413,1cyclictest0-21swapper/210:28:272
724299140,5cyclictest0-21swapper/211:53:392
724299140,14cyclictest0-21swapper/209:44:032
724299140,13cyclictest0-21swapper/211:31:492
7239991412,2cyclictest0-21swapper/112:35:141
723999141,12cyclictest25-21ksoftirqd/110:40:131
7239991410,3cyclictest18504-21cron08:39:591
723999140,3cyclictest0-21swapper/111:10:161
723999140,14cyclictest0-21swapper/111:57:201
723699149,3cyclictest19054-21tr08:40:140
723699142,8cyclictest31433-21if_err_enp0s31f10:45:210
723699142,11cyclictest18450-21awk09:40:000
723699141,7cyclictest9149-21munin-run11:50:000
7236991411,2cyclictest27541-21grep08:55:270
723699140,13cyclictest0-21swapper/009:23:360
724699139,2cyclictest16330-21grep11:15:153
724699138,1cyclictest2297-21apt-get09:30:133
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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