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2026-09-09 - 11:33

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 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 highest latencies:
System rack9slot4s (updated Wed Sep 09, 2026 00:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30879911271096,27cyclictest4969-21pidof19:30:011
12072704620,42sleep10-21swapper/119:20:021
29822509416,77sleep00-21swapper/019:24:280
308699169109,41cyclictest4958-21munin-run19:30:000
302862780,4sleep1201rcuc/122:00:161
303912440,2sleep130392-21proc_pri23:25:261
89912425,33sleep12225-21dbus-daemon21:04:571
3087994024,5cyclictest22-21ksoftirqd/122:25:441
308699408,6cyclictest273092chrt23:18:270
308699408,6cyclictest273092chrt23:18:270
3087993924,5cyclictest22-21ksoftirqd/120:05:411
3087993917,8cyclictest22-21ksoftirqd/120:26:371
308699391,21cyclictest30430-21cstates20:35:120
3087993817,7cyclictest22-21ksoftirqd/120:48:001
3087993817,6cyclictest22-21ksoftirqd/122:30:101
3087993816,8cyclictest22-21ksoftirqd/119:38:511
3087993816,7cyclictest22-21ksoftirqd/123:18:391
3087993816,7cyclictest22-21ksoftirqd/123:18:391
308699389,11cyclictest963-21seq22:09:390
195192380,5sleep019520-21rt-features21:30:300
3087993716,7cyclictest22-21ksoftirqd/121:34:331
3087993715,8cyclictest22-21ksoftirqd/123:42:271
3087993715,8cyclictest22-21ksoftirqd/121:48:081
3087993715,8cyclictest22-21ksoftirqd/100:37:511
3087993715,7cyclictest22-21ksoftirqd/123:34:201
3087993715,6cyclictest22-21ksoftirqd/122:05:271
3087993713,8cyclictest22-21ksoftirqd/120:56:591
308799364,22cyclictest22-21ksoftirqd/121:12:131
3087993616,6cyclictest22-21ksoftirqd/119:45:141
3087993616,6cyclictest22-21ksoftirqd/100:42:171
3087993614,8cyclictest22-21ksoftirqd/119:34:491
308699362,15cyclictest24717-21hddtemp_smartct21:45:160
132112361,4sleep113220-21diskstats21:15:161
308799355,19cyclictest5296-21sshd23:45:211
3087993514,7cyclictest22-21ksoftirqd/120:41:581
3087993514,7cyclictest22-21ksoftirqd/119:52:471
3087993513,8cyclictest22-21ksoftirqd/123:21:161
3087993513,8cyclictest22-21ksoftirqd/122:52:201
3087993513,7cyclictest22-21ksoftirqd/100:29:091
3087993513,7cyclictest22-21ksoftirqd/100:21:481
3087993413,7cyclictest22-21ksoftirqd/121:56:151
3087993412,8cyclictest22-21ksoftirqd/121:26:581
308699341,15cyclictest21824-21python20:10:290
309982331,28sleep131035-21ntp_states20:35:251
308799335,14cyclictest16852-21proc_pri00:15:261
3087993312,7cyclictest22-21ksoftirqd/119:59:461
3087993312,6cyclictest22-21ksoftirqd/123:04:421
308699331,28cyclictest7230-21sh22:25:140
243712331,9sleep10-21swapper/120:19:451
179972331,28sleep018069-21python20:00:290
99122321,5sleep10-21swapper/123:57:291
99122321,5sleep10-21swapper/123:57:281
308799329,5cyclictest0-21swapper/122:20:121
308799329,12cyclictest22-21ksoftirqd/120:53:491
308799328,9cyclictest3398-21cstates22:15:151
308799319,13cyclictest22-21ksoftirqd/123:14:201
308799319,12cyclictest22-21ksoftirqd/120:02:321
308799315,8cyclictest2225-21dbus-daemon00:50:341
308799311,18cyclictest12454-21cstates00:05:131
3087993110,6cyclictest22-21ksoftirqd/100:00:381
308699311,4cyclictest81rcu_preempt22:30:100
25012311,5sleep10-21swapper/122:10:471
101182311,26sleep110125-21iostat_ios19:40:211
308799309,10cyclictest0-21swapper/121:41:461
308799307,8cyclictest15014-21if_eth022:45:171
308799306,8cyclictest22-21ksoftirqd/100:48:421
308799303,23cyclictest0-21swapper/121:35:261
308799302,8cyclictest0-21swapper/122:39:021
308799302,8cyclictest0-21swapper/122:39:011
3087993010,6cyclictest22-21ksoftirqd/100:34:561
3086993019,6cyclictest19452-21unixbench_singl22:55:300
308699301,5cyclictest81rcu_preempt00:37:510
308699301,4cyclictest81rcu_preempt19:45:140
308699301,4cyclictest81rcu_preempt19:38:520
308699301,4cyclictest81rcu_preempt00:42:160
277802301,5sleep10-21swapper/121:54:401
261772301,5sleep10-21swapper/120:23:501
235032301,5sleep10-21swapper/123:07:581
32092291,5sleep00-21swapper/020:48:390
308799297,5cyclictest0-21swapper/123:37:151
308799297,12cyclictest22-21ksoftirqd/123:53:271
308799292,9cyclictest28937-21iostat_ios20:30:211
308799291,8cyclictest18815-21irqstats22:55:201
308799291,13cyclictest14383-21df_inode00:10:141
3086992910,13cyclictest3286-21runrttasks23:06:590
308699290,4cyclictest81rcu_preempt20:26:360
293482291,5sleep00-21swapper/021:56:260
222882291,5sleep10-21swapper/120:12:381
204472291,5sleep00-21swapper/020:08:010
141552291,5sleep10-21swapper/122:43:321
119892291,5sleep00-21swapper/022:35:440
119892291,5sleep00-21swapper/022:35:430
109552291,5sleep00-21swapper/019:42:050
98632281,5sleep00-21swapper/023:57:000
98632281,5sleep00-21swapper/023:56:590
47292281,5sleep00-21swapper/022:18:280
46882281,4sleep00-21swapper/023:45:070
4142281,5sleep00-21swapper/023:32:420
315002281,4sleep00-21swapper/022:04:070
308799282,12cyclictest15426-21iostat_ios21:20:221
308799281,8cyclictest10425-21users21:05:291
308699289,13cyclictest29847-21fschecks_count23:25:150
308699286,15cyclictest239472chrt20:15:290
308699283,22cyclictest0-21swapper/000:15:140
3086992818,6cyclictest1216-21wget22:10:100
3086992817,6cyclictest6456-21sort20:55:280
308699281,4cyclictest81rcu_preempt23:42:270
288862281,5sleep00-21swapper/000:48:350
230682281,5sleep00-21swapper/000:32:120
194182281,5sleep00-21swapper/000:23:170
180992281,5sleep00-21swapper/021:26:450
176372281,5sleep00-21swapper/022:50:430
161702281,5sleep00-21swapper/021:21:110
160862281,5sleep00-21swapper/022:49:060
147612281,4sleep00-21swapper/019:52:380
144632281,5sleep00-21swapper/021:18:100
136962281,5sleep00-21swapper/000:07:340
108292281,5sleep00-21swapper/021:09:340
72292271,5sleep00-21swapper/019:32:310
308699274,17cyclictest10637-21diskstats00:00:150
308699272,20cyclictest28392-21/usr/sbin/munin20:30:130
308699271,4cyclictest81rcu_preempt00:29:090
277382271,4sleep00-21swapper/021:54:130
109012271,5sleep00-21swapper/021:10:010
72852261,5sleep00-21swapper/021:00:080
308699263,8cyclictest12884-21diskstats22:40:170
308699262,10cyclictest0-21swapper/023:05:010
3086992617,6cyclictest3-21ksoftirqd/020:20:310
308699261,4cyclictest81rcu_preempt20:41:540
308699261,3cyclictest81rcu_preempt23:21:160
308699261,21cyclictest6791-21latency_hist22:25:010
308699261,17cyclictest30200-21/usr/sbin/munin00:50:220
3086992610,12cyclictest2225-21dbus-daemon23:53:020
308699251,6cyclictest24694-21ntp_states23:10:230
308699251,4cyclictest0-21swapper/020:50:580
308699243,19cyclictest0-21swapper/021:35:490
308699242,17cyclictest23367-21python21:40:260
308699242,16cyclictest15987-21ntp_states19:55:260
3086992416,5cyclictest3-21ksoftirqd/023:39:310
3086992415,5cyclictest157782sleep000:14:430
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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