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2026-04-30 - 19:19

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #4

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 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 highest latencies:
System rack9slot4s (updated Thu Apr 30, 2026 12:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
128739912481232,11cyclictest0-21swapper/107:25:111
128739911351126,6cyclictest0-21swapper/109:25:171
124962578531,32sleep00-21swapper/007:21:380
124042455411,29sleep10-21swapper/107:20:401
1287299184166,14cyclictest0-21swapper/007:25:120
209962990,8sleep11287399cyclictest11:00:331
125562890,3sleep00-21swapper/010:50:590
12872997567,5cyclictest1334-21tune2fs09:25:170
88562670,8sleep01287299cyclictest08:35:250
1287299632,46cyclictest10592-21munin-run10:50:010
1287299612,18cyclictest0-21swapper/007:30:020
1287299592,12cyclictest2670-21irqstats10:40:200
1287299582,15cyclictest9462-21iostat11:25:180
1287299581,17cyclictest9747-21udevd09:34:440
1287299581,13cyclictest11101-21grep09:35:180
1287299575,14cyclictest11565-21gdbus12:33:140
1287299572,14cyclictest28379-21/usr/sbin/munin12:25:320
12872995718,7cyclictest21728-21diskstats07:45:150
1287299571,20cyclictest12763-21python08:45:290
1287299552,15cyclictest24163-21irqstats09:50:210
1287299552,13cyclictest0-21swapper/010:06:060
1287299552,12cyclictest17868-21latency_hist09:05:000
273672540,4sleep041ktimersoftd/011:45:280
1287299549,5cyclictest5589-21ssh12:35:230
1287299548,6cyclictest12222-21sensors_temp12:05:280
1287299545,13cyclictest29630-21uname09:20:250
1287299542,15cyclictest24743-21df09:15:130
1287299542,14cyclictest27793-21/usr/sbin/munin09:55:210
1287299542,14cyclictest24324-21python07:50:270
1287299542,13cyclictest0-21swapper/010:57:540
1287299541,13cyclictest7808-21ssh12:00:260
1287299532,12cyclictest3363-21ntp_states11:55:250
12872995316,7cyclictest3993-21cron08:25:000
12872995312,5cyclictest19901-21taskset09:10:010
12872995312,5cyclictest15947-21hddtemp_smartct12:10:170
12872995311,7cyclictest568-21wget11:15:170
1287299529,5cyclictest3286-21runrttasks10:36:350
1287299527,12cyclictest20389-21kernelversion12:15:190
1287299523,12cyclictest21523-21latency_hist11:40:000
1287299522,15cyclictest0-21swapper/008:07:180
12872995217,6cyclictest9223-21cut12:40:110
12872995213,7cyclictest4439-21ssh11:20:070
1287299521,16cyclictest3286-21runrttasks10:22:360
1287299521,13cyclictest14342-21ntp_states12:45:240
1287299512,13cyclictest21965-21hddtemp_smartct10:25:170
1287299511,15cyclictest25775-21/usr/sbin/munin07:55:180
12872995111,5cyclictest2401-21NetworkManager10:02:100
1287299511,12cyclictest11071-21unixbench_multi08:40:270
12872995110,6cyclictest31595-21/usr/sbin/munin08:10:210
1287299503,6cyclictest19823-21iostat_ios09:45:190
1287299503,14cyclictest0-21swapper/008:04:260
1287299502,15cyclictest20799-21sort11:00:310
1287299502,13cyclictest27158-21users10:30:290
1287299501,7cyclictest13198-21fschecks_time10:15:140
12872995014,7cyclictest1171-21taskset11:53:320
1287299501,15cyclictest18145-21/usr/sbin/munin12:50:160
1287299501,13cyclictest21776-21/usr/sbin/munin11:40:230
1287299501,12cyclictest24059-21ssh12:20:090
1287299494,9cyclictest25257-21users11:05:300
1287299492,12cyclictest4435-21df_inode08:25:130
1287299482,12cyclictest0-21swapper/008:55:090
1287299482,12cyclictest0-21swapper/008:55:090
1287299481,21cyclictest0-21swapper/008:50:400
1287299481,14cyclictest1660-21runrttasks08:16:470
1287299481,14cyclictest11305-21ssh10:12:550
1287299481,13cyclictest18040-21aten_r4power_cu09:05:110
1287299481,13cyclictest17111-21ssh09:41:550
1287299481,12cyclictest28562-21fschecks_count11:10:160
1287299461,13cyclictest16883-21ssh11:34:270
1287299461,13cyclictest16883-21ssh11:34:270
1287299451,12cyclictest2401-21NetworkManager07:39:100
1287299421,11cyclictest11565-21gdbus07:43:280
110392400,6sleep111026-21ssh09:35:161
237812371,32sleep123805-21awk12:20:001
212112361,31sleep121221-21sh09:46:341
183952361,32sleep12695-21snmpd10:58:331
140672361,31sleep119749-21diskmemload11:30:251
140672361,31sleep119749-21diskmemload11:30:241
1287399365,5cyclictest81rcu_preempt11:22:391
126042365,3sleep130489-21kworker/1:110:51:061
125732365,3sleep10-21swapper/112:05:381
1287399353,4cyclictest81rcu_preempt12:41:221
1287399351,9cyclictest21648-21ssh11:40:001
53202341,5sleep15331-21/usr/sbin/munin09:30:091
233912341,29sleep123401-21ssh11:40:491
1287399341,9cyclictest31960-21rm10:36:171
12873993414,10cyclictest22-21ksoftirqd/109:23:381
1287399341,22cyclictest17186-21ssh12:49:331
313122331,28sleep12695-21snmpd11:13:271
159632331,28sleep115973-21ssh10:18:321
1287399331,21cyclictest0-21swapper/112:20:411
12873993310,4cyclictest81rcu_preempt10:42:221
266802321,27sleep126688-21ntp_states10:30:231
261162321,27sleep126126-21ssh11:06:581
178282321,27sleep117838-21ssh09:43:111
1287399321,5cyclictest15946-21ssh12:10:171
1287399321,16cyclictest19749-21diskmemload11:19:351
233812311,4sleep123391-21ssh10:26:241
1287399313,5cyclictest0-21swapper/109:11:061
1287399313,15cyclictest15986-21turbostat.cron09:00:001
1287399313,15cyclictest15986-21turbostat.cron09:00:001
1287399311,9cyclictest7845-21ssh12:38:251
12873993117,4cyclictest22-21ksoftirqd/112:00:051
12873993113,6cyclictest2225-21dbus-daemon08:31:071
79562301,4sleep17966-21ssh10:09:371
132092301,4sleep10-21swapper/108:47:221
1287399305,14cyclictest40250irq/92-i91509:53:011
1287399303,5cyclictest0-21swapper/111:52:011
1287399303,15cyclictest0-21swapper/112:26:251
1287399301,4cyclictest81rcu_preempt11:59:351
1287399301,4cyclictest81rcu_preempt09:57:001
1287399301,17cyclictest2257-21basename08:20:121
1287399301,16cyclictest18931-21ssh10:21:101
1287399296,4cyclictest81rcu_preempt12:32:201
1287399292,14cyclictest0-21swapper/109:15:241
12873992919,6cyclictest9813-21unixbench_multi10:10:311
12873992915,10cyclictest30915-21tr08:10:101
1287399291,15cyclictest6480-21aten_r4power_cu10:45:101
12873992911,14cyclictest3286-21runrttasks11:45:171
12872992910,6cyclictest7630-21cron08:34:000
16872281,5sleep10-21swapper/110:01:281
1287399285,4cyclictest81rcu_preempt08:05:021
1287399282,11cyclictest3286-21runrttasks08:02:061
1287399281,23cyclictest18434-21cut12:50:211
1287399281,16cyclictest12336-21ssh11:29:051
1287399281,14cyclictest23803-21hddtemp_smartct07:50:161
1287399281,13cyclictest1604-21chrt08:16:121
189112271,5sleep10-21swapper/107:37:141
136192271,5sleep10-21swapper/108:50:051
1287399279,5cyclictest0-21swapper/107:44:541
1287399273,9cyclictest26443-21users07:55:281
12873992719,5cyclictest4579-21fschecks_time08:25:161
12873992713,11cyclictest22-21ksoftirqd/108:36:451
1287399271,14cyclictest18713-21memory09:05:221
114212271,5sleep10-21swapper/108:43:221
1287399261,7cyclictest0-21swapper/107:30:011
1287399252,3cyclictest81rcu_preempt09:04:341
12873992414,6cyclictest21895-21grep07:45:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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