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2026-03-11 - 18:42

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 Wed Mar 11, 2026 12:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
851929564,12sleep30-21swapper/307:06:493
847829380,9sleep00-21swapper/007:06:180
842529066,8sleep20-21swapper/207:05:362
847928164,13sleep10-21swapper/107:06:191
8849993130,1cyclictest0-21swapper/009:35:090
8849992524,1cyclictest0-21swapper/011:13:130
885699230,23cyclictest0-21swapper/212:10:492
885699230,23cyclictest0-21swapper/212:10:492
885699220,20cyclictest0-21swapper/210:56:292
885499220,2cyclictest13730-21sed12:30:011
885699202,1cyclictest0-21swapper/210:01:382
8854992015,2cyclictest0-21swapper/109:16:351
885499200,20cyclictest0-21swapper/112:15:181
885499200,20cyclictest0-21swapper/111:36:361
8849992018,1cyclictest0-21swapper/011:58:290
8859991917,1cyclictest0-21swapper/311:03:513
885699190,0cyclictest0-21swapper/212:19:552
885499190,18cyclictest0-21swapper/110:40:301
884999192,1cyclictest0-21swapper/011:33:560
8849991917,1cyclictest0-21swapper/009:13:240
8849991917,1cyclictest0-21swapper/008:00:130
885999183,2cyclictest141rcu_preempt12:07:533
8859991812,4cyclictest8066-21ssh10:50:123
8856991817,1cyclictest0-21swapper/210:12:252
8854991816,1cyclictest22378-21kworker/1:107:40:141
8854991815,2cyclictest0-21swapper/109:00:181
885499180,1cyclictest0-21swapper/109:51:271
885499180,16cyclictest0-21swapper/109:09:551
885499180,0cyclictest0-21swapper/112:06:281
8849991816,1cyclictest13-21ksoftirqd/010:12:470
8849991816,1cyclictest13-21ksoftirqd/010:05:110
8849991816,1cyclictest0-21swapper/012:39:250
8849991813,4cyclictest13-21ksoftirqd/011:40:000
884999180,1cyclictest0-21swapper/011:15:150
884999180,18cyclictest0-21swapper/012:22:080
884999180,14cyclictest1434-21diskmemload09:32:490
885499172,14cyclictest11292-21latency_hist09:35:001
8854991716,1cyclictest0-21swapper/110:00:181
885499171,1cyclictest10410-21ssh11:30:111
885499170,0cyclictest0-21swapper/110:11:551
884999172,13cyclictest12484-21cron09:55:000
8849991716,1cyclictest0-21swapper/011:08:350
8849991716,1cyclictest0-21swapper/010:20:320
8849991715,1cyclictest13-21ksoftirqd/011:24:150
884999170,0cyclictest141rcu_preempt10:57:070
245942171,0sleep30-21swapper/312:35:323
885999162,8cyclictest225-21systemd-journal08:30:003
8856991616,0cyclictest0-21swapper/209:29:052
885699160,3cyclictest0-21swapper/210:25:062
885499162,13cyclictest13847-21awk08:25:241
8854991611,4cyclictest11740-21ssh10:51:441
884999162,8cyclictest29052-21sendmail09:00:000
884999162,1cyclictest141rcu_preempt09:28:320
8849991615,1cyclictest0-21swapper/008:22:390
8849991613,2cyclictest26657-21ls08:55:000
8849991613,2cyclictest26657-21ls08:55:000
884999161,1cyclictest141rcu_preempt08:15:130
885999158,3cyclictest27905-21grep09:25:153
885999154,7cyclictest11467-21apt-get07:15:133
885999152,3cyclictest0-21swapper/311:10:143
885999150,1cyclictest0-21swapper/310:35:163
885699159,5cyclictest20697-21cat09:20:242
885699151,1cyclictest7218-21ssh11:08:512
885699150,2cyclictest0-21swapper/210:06:032
885699150,15cyclictest0-21swapper/209:19:492
885699150,14cyclictest0-21swapper/209:52:332
8854991510,3cyclictest16531-21cut10:55:141
885499150,1cyclictest0-21swapper/109:35:331
884999152,9cyclictest13-21ksoftirqd/011:43:020
884999152,2cyclictest0-21swapper/010:02:320
884999152,10cyclictest13-21ksoftirqd/010:45:120
8849991513,2cyclictest13-21ksoftirqd/012:13:480
8849991513,2cyclictest13-21ksoftirqd/012:13:480
8849991512,2cyclictest13-21ksoftirqd/012:10:000
885999148,3cyclictest23093-21sendmail07:40:003
8859991411,2cyclictest17921-21sed07:25:283
8859991410,3cyclictest24349-21cat10:20:243
885699143,1cyclictest0-21swapper/209:30:082
8856991412,1cyclictest0-21swapper/211:36:452
8856991410,1cyclictest55750irq/128-enp2s0-10:48:552
885699140,14cyclictest0-21swapper/211:26:072
8854991413,1cyclictest0-21swapper/110:37:301
885499141,2cyclictest0-21swapper/111:59:441
8854991412,1cyclictest0-21swapper/111:50:531
8854991410,3cyclictest9772-21cron08:20:001
885499140,3cyclictest0-21swapper/110:19:071
885499140,2cyclictest0-21swapper/111:25:251
885499140,12cyclictest507-21head10:45:171
884999145,2cyclictest141rcu_preempt10:28:430
8849991411,2cyclictest7398-21sh08:15:000
884999141,12cyclictest0-21swapper/007:40:140
8849991410,3cyclictest24064-21ls08:50:000
885999139,3cyclictest27909-21http09:45:003
885999136,4cyclictest14198-21apache_volume10:15:113
885999132,8cyclictest0-21swapper/311:59:283
885999131,4cyclictest18845-21/usr/sbin/munin11:15:223
8859991310,2cyclictest4027-21grep09:30:163
8859991310,2cyclictest30797-21grep10:05:173
8859991310,2cyclictest19316-21head07:30:163
885999130,12cyclictest2600-21grep11:25:163
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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