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2026-04-11 - 09:25

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 Sat Apr 11, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2587029072,13sleep30-21swapper/319:05:203
2686828977,8sleep00-21swapper/019:08:470
2676628270,8sleep20-21swapper/219:07:282
2686927659,13sleep10-21swapper/119:08:481
149272490,0sleep00-21swapper/023:20:260
2705599270,24cyclictest0-21swapper/221:26:432
27059992524,1cyclictest0-21swapper/320:01:173
27059992421,2cyclictest5675-21apache_accesses23:35:113
27059992416,8cyclictest17213-21kworker/3:022:48:023
2705399244,19cyclictest4134-21perf19:30:011
27059992219,2cyclictest22631-21ntp_states23:25:213
27053992219,2cyclictest29730-21apache_processe23:30:121
27059992119,2cyclictest17213-21kworker/3:023:41:113
27059992118,2cyclictest30174-21apache_volume21:35:123
27059992118,2cyclictest20532-21apache_processe21:10:113
27059992118,2cyclictest10211-21apache_processe22:40:123
27059992118,2cyclictest10211-21apache_processe22:40:113
27059992116,1cyclictest9028-21ssh22:00:203
2705599210,21cyclictest0-21swapper/222:58:292
27053992118,2cyclictest1299-21ntp_states00:10:221
2705399210,1cyclictest0-21swapper/121:52:201
27049992120,1cyclictest0-21swapper/022:41:280
27049992120,1cyclictest0-21swapper/022:41:280
27059992018,2cyclictest26550-21kworker/3:200:09:433
27059992018,2cyclictest17213-21kworker/3:023:51:223
27059992017,3cyclictest17213-21kworker/3:000:01:123
27059992017,2cyclictest7409-21df23:55:143
27053992017,2cyclictest8177-21ntp_states23:55:201
27053992017,2cyclictest6164-21apache_accesses21:40:121
27053992017,2cyclictest3854-21hddtemp_smartct22:55:151
2705399200,20cyclictest0-21swapper/100:28:291
2705399200,20cyclictest0-21swapper/100:28:281
2705399200,19cyclictest0-21swapper/123:41:471
2704999200,19cyclictest0-21swapper/023:58:500
276742190,0sleep00-21swapper/021:33:280
27059991917,2cyclictest39-21ksoftirqd/321:55:353
27059991917,2cyclictest17213-21kworker/3:022:17:423
27059991916,2cyclictest23196-21df_inode23:45:153
2705999190,16cyclictest6611-21sensors21:20:253
27055991917,2cyclictest0-21swapper/221:16:032
2705599190,2cyclictest0-21swapper/220:20:132
2705399195,2cyclictest141rcu_preempt21:19:021
2705399193,13cyclictest27016-21apt-get22:50:121
2705399190,1cyclictest0-21swapper/122:06:401
2705399190,19cyclictest0-21swapper/121:47:581
2704999195,8cyclictest23805-21apt-get00:05:150
118372190,1sleep20-21swapper/223:38:362
316532180,0sleep1241rcuc/121:55:111
27059991816,2cyclictest26550-21kworker/3:200:31:423
27059991816,2cyclictest17213-21kworker/3:021:30:413
27059991815,2cyclictest26750-21hddtemp_smartct22:30:173
2705599180,18cyclictest0-21swapper/222:41:282
2705599180,18cyclictest0-21swapper/222:41:272
2705599180,17cyclictest0-21swapper/200:28:012
2705599180,17cyclictest0-21swapper/200:28:002
2705399180,17cyclictest0-21swapper/120:20:131
2704999180,4cyclictest141rcu_preempt22:07:580
195612180,1chrt19564-21munin-run23:05:011
27059991714,2cyclictest9638-21ntp_states00:15:213
2705599173,6cyclictest0-21swapper/223:02:042
2705599170,6cyclictest0-21swapper/222:29:192
2705599170,17cyclictest0-21swapper/223:30:202
2705599170,17cyclictest0-21swapper/223:15:272
2705599170,0cyclictest0-21swapper/223:58:492
2705399170,2cyclictest0-21swapper/123:09:101
2705399170,2cyclictest0-21swapper/100:32:281
2704999170,2cyclictest0-21swapper/000:34:070
2704999170,1cyclictest0-21swapper/023:50:010
2704999170,0cyclictest0-21swapper/021:16:030
27055991615,1cyclictest0-21swapper/221:50:452
27055991614,2cyclictest32-21ksoftirqd/221:41:062
27055991614,1cyclictest0-21swapper/223:05:232
2705599160,1cyclictest0-21swapper/200:37:192
2705399160,16cyclictest0-21swapper/121:20:391
2704999165,4cyclictest21785-21taskset23:44:490
2704999162,7cyclictest31164-21munin-run21:54:590
27049991614,1cyclictest20059-21diskmemload22:25:140
38672150,3sleep10-21swapper/121:38:371
27059991512,2cyclictest17420-21memory22:05:183
27059991511,3cyclictest25461-21head22:10:153
2705999150,0cyclictest0-21swapper/322:25:543
2705599153,6cyclictest21323-21apt-get23:25:132
2705599152,12cyclictest15853-21/usr/sbin/munin21:45:182
27055991514,1cyclictest0-21swapper/222:35:162
27053991514,1cyclictest0-21swapper/122:39:251
27053991513,1cyclictest21175-21df_inode21:10:141
2705399150,0cyclictest0-21swapper/121:29:391
2704999156,8cyclictest0-21swapper/021:23:400
27049991514,1cyclictest0-21swapper/019:40:140
2704999150,3cyclictest0-21swapper/023:11:390
2704999150,2cyclictest0-21swapper/023:01:500
2705999142,1cyclictest0-21swapper/323:05:113
27059991411,2cyclictest15065-21cron21:00:003
2705999140,12cyclictest21399-21basename20:05:133
27055991411,1cyclictest0-21swapper/222:08:162
2705599140,12cyclictest0-21swapper/223:44:232
2705399144,5cyclictest225-21systemd-journal22:50:001
27053991411,3cyclictest0-21swapper/100:03:561
27053991411,2cyclictest26144-21cut22:30:151
27053991410,3cyclictest6429-21grep23:35:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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