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2026-08-16 - 20:59

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 376 highest latencies:
System rack9slot4s (updated Sun Aug 16, 2026 12:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81329911711143,24cyclictest12550-21munin-run07:35:001
77282671625,30sleep10-21swapper/107:21:211
80162503456,32sleep00-21swapper/007:24:200
813199152130,4cyclictest12571-21apt-get07:35:000
236702830,3sleep0111rcuc/010:55:120
218332680,6sleep1813299cyclictest10:50:131
8131994314,19cyclictest3-21ksoftirqd/010:36:510
8131994117,8cyclictest3-21ksoftirqd/008:46:260
8131994017,8cyclictest3-21ksoftirqd/008:22:260
8131994016,8cyclictest3-21ksoftirqd/011:47:280
8131993923,6cyclictest3286-21runrttasks08:52:550
8131993916,7cyclictest3-21ksoftirqd/009:32:560
8131993816,7cyclictest3-21ksoftirqd/011:07:470
8131993816,7cyclictest3-21ksoftirqd/010:28:110
8131993816,7cyclictest3-21ksoftirqd/010:28:100
8131993815,8cyclictest3-21ksoftirqd/010:21:080
8131993814,8cyclictest3-21ksoftirqd/010:41:010
813299378,13cyclictest40250irq/92-i91508:05:161
813199371,6cyclictest31266-21if_eth012:40:190
8131993715,8cyclictest3-21ksoftirqd/012:28:000
8131993715,8cyclictest3-21ksoftirqd/011:41:570
8131993714,8cyclictest3-21ksoftirqd/009:37:290
8132993623,9cyclictest21176-21pidof10:47:001
8131993619,7cyclictest4946-21latency_hist08:40:010
8131993613,8cyclictest3-21ksoftirqd/008:41:170
7302361,5sleep1734-21irqstats12:45:211
321152360,24sleep122-21ksoftirqd/111:15:291
813199359,6cyclictest3-21ksoftirqd/012:00:240
8131993520,5cyclictest31690-21grep11:15:230
8131993520,5cyclictest12904-21fschecks_count09:00:150
8131993514,10cyclictest16363-21awk07:44:590
8131993513,7cyclictest3-21ksoftirqd/011:28:010
8131993513,7cyclictest3-21ksoftirqd/007:46:140
8131993512,9cyclictest8129-21cyclictest09:07:350
8131993512,8cyclictest8129-21cyclictest12:24:190
8131993419,5cyclictest24552-21fschecks_count08:05:150
8131993419,5cyclictest17474-21ls09:10:290
8131993418,6cyclictest10188-21pidof10:20:010
8131993415,6cyclictest3-21ksoftirqd/007:35:240
8131993414,6cyclictest3-21ksoftirqd/008:57:370
8131993414,6cyclictest3-21ksoftirqd/008:57:360
8131993413,9cyclictest19403-21unixbench_multi09:15:290
8131993412,8cyclictest3-21ksoftirqd/007:50:420
8131993412,7cyclictest3-21ksoftirqd/010:05:360
8131993410,8cyclictest3-21ksoftirqd/009:45:130
89222330,25sleep10-21swapper/108:50:131
813299331,6cyclictest6929-21/usr/sbin/munin08:45:241
813199339,8cyclictest3-21ksoftirqd/012:53:340
8131993320,10cyclictest0-21swapper/008:15:060
8131993318,4cyclictest18260-21needreboot12:05:230
8131993317,6cyclictest29932-21/usr/sbin/munin11:10:220
8131993317,6cyclictest28455-21awk09:40:240
8131993316,5cyclictest1768-21iostat_ios08:30:200
8131993313,7cyclictest3-21ksoftirqd/012:19:200
8131993313,6cyclictest3-21ksoftirqd/012:46:030
191602331,28sleep119167-21iostat_ios07:50:201
8132993224,4cyclictest22-21ksoftirqd/111:40:011
813199329,8cyclictest8129-21cyclictest11:30:220
8131993221,8cyclictest0-21swapper/009:56:430
8131993221,8cyclictest0-21swapper/009:27:190
8131993212,8cyclictest3839-21python10:00:290
8131993212,6cyclictest3-21ksoftirqd/011:53:120
14772321,5sleep10-21swapper/109:55:231
813199319,12cyclictest3-21ksoftirqd/009:20:390
813199318,5cyclictest8631-21fschecks_count07:25:170
813199318,5cyclictest3-21ksoftirqd/010:30:130
8131993120,8cyclictest0-21swapper/009:54:340
8131993120,8cyclictest0-21swapper/008:00:040
8131993118,5cyclictest0-21swapper/012:30:270
8131993118,5cyclictest0-21swapper/010:45:270
8131993117,4cyclictest26631-21unixbench_singl11:00:300
8131993116,7cyclictest0-21swapper/011:56:150
8131993115,5cyclictest30056-21users12:35:300
8131993114,6cyclictest19673-21df12:10:130
813199311,18cyclictest694-21cat11:20:140
166472311,4sleep116808-21perl09:10:171
8132993020,6cyclictest29596-21wget09:45:131
8132993010,15cyclictest214912chrt09:21:291
813199309,7cyclictest3-21ksoftirqd/011:38:320
8131993020,8cyclictest0-21swapper/010:54:360
8131993019,9cyclictest0-21swapper/008:13:080
8131993019,9cyclictest0-21swapper/008:13:080
8131993018,5cyclictest0-21swapper/010:10:190
8131993016,6cyclictest0-21swapper/008:28:000
8131993013,6cyclictest20603-21grep07:55:120
246852301,5sleep10-21swapper/112:23:021
96532291,5sleep10-21swapper/107:26:331
813299294,4cyclictest81rcu_preempt09:07:341
8132992919,6cyclictest32415-21sh12:45:001
813299291,5cyclictest81rcu_preempt08:22:251
813299291,4cyclictest81rcu_preempt11:47:281
813299291,4cyclictest81rcu_preempt09:32:561
8132992914,12cyclictest22-21ksoftirqd/107:35:131
295502291,5sleep10-21swapper/108:18:381
226182291,5sleep10-21swapper/112:16:181
207882291,5sleep10-21swapper/112:11:441
153952291,5sleep10-21swapper/111:59:251
94302281,5sleep10-21swapper/111:40:561
813299285,16cyclictest14700-21iostat_ios10:30:181
813299283,21cyclictest0-21swapper/112:35:101
813299283,19cyclictest2743-21/usr/sbin/munin10:00:321
813299281,23cyclictest20460-21aten_r4power_cu07:55:111
8132992811,13cyclictest8951-21hddtemp_smartct10:15:191
8132992811,13cyclictest0-21swapper/110:40:571
813299280,4cyclictest81rcu_preempt11:07:471
327412281,5sleep10-21swapper/109:51:161
291682281,5sleep10-21swapper/109:43:081
273412281,5sleep10-21swapper/109:38:521
27152281,5sleep10-21swapper/108:33:001
175662281,5sleep10-21swapper/110:38:431
122272281,5sleep10-21swapper/110:25:111
122272281,5sleep10-21swapper/110:25:101
119722281,5sleep10-21swapper/110:24:041
8282271,5sleep10-21swapper/108:28:181
813299279,12cyclictest40250irq/92-i91507:50:001
813299274,3cyclictest81rcu_preempt10:56:191
813299272,21cyclictest0-21swapper/111:20:181
8132992721,4cyclictest22-21ksoftirqd/108:05:001
8132992720,5cyclictest22-21ksoftirqd/111:35:001
8132992717,6cyclictest26146-21ls12:25:281
8132992714,10cyclictest22-21ksoftirqd/108:55:311
8132992714,10cyclictest22-21ksoftirqd/108:55:311
8132992711,12cyclictest8176-21taskset10:13:541
34152271,4sleep10-21swapper/112:50:361
276022271,5sleep10-21swapper/108:12:561
276022271,5sleep10-21swapper/108:12:551
197302271,5sleep10-21swapper/109:17:561
159522271,5sleep10-21swapper/107:40:591
131692271,5sleep10-21swapper/111:50:461
813299262,4cyclictest81rcu_preempt11:28:011
8132992617,6cyclictest3169-21aten_r4power_cu08:35:111
813299261,5cyclictest0-21swapper/108:40:131
8132992613,7cyclictest15940-21diskstats12:00:161
8132992610,12cyclictest0-21swapper/112:30:251
8132992610,12cyclictest0-21swapper/110:05:291
8132992515,6cyclictest19122-21runrttasks12:08:571
269262251,4sleep10-21swapper/111:03:071
813299244,10cyclictest0-21swapper/111:11:271
8132992415,5cyclictest23120-21cat09:25:301
8132992412,7cyclictest13183-21iostat_ios09:00:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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