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2026-08-24 - 19:20

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 Mon Aug 24, 2026 12:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10487991018990,24cyclictest22818-21memory10:45:211
100472548502,31sleep00-21swapper/007:20:590
102012467385,42sleep10-21swapper/107:22:351
1048699237230,4cyclictest0-21swapper/010:45:210
2671621210,8sleep11048799cyclictest10:55:251
2671621210,8sleep11048799cyclictest10:55:241
78852790,4sleep0111rcuc/008:40:160
10487997366,4cyclictest0-21swapper/107:25:131
1048699567,13cyclictest2225-21dbus-daemon11:45:330
1048699378,17cyclictest15248-21/usr/sbin/munin07:35:130
1048699371,11cyclictest81rcu_preempt11:20:090
64162361,32sleep15531-21/usr/sbin/munin08:35:271
1048799361,12cyclictest19082mailstats11:15:271
1048699361,18cyclictest1752-21aten_r4power_po08:25:110
1048699355,5cyclictest0-21swapper/010:50:220
1048699353,17cyclictest7299-21iostat11:30:190
10486993512,11cyclictest0-21swapper/011:40:000
1048799342,16cyclictest9182-21iostat_ios11:35:201
1048799341,10cyclictest20595-21/usr/sbin/munin09:15:231
161122331,4sleep116113-21sshd11:55:091
1048799331,14cyclictest259372fschecks_time12:20:151
1048699337,13cyclictest81rcu_preempt09:55:130
1048699332,19cyclictest0-21swapper/012:35:230
1048699331,20cyclictest18080-21runrttasks10:33:520
1048699331,13cyclictest21840-21runrttasks10:43:440
1048799325,14cyclictest40250irq/92-i91507:40:141
1048799323,17cyclictest0-21swapper/108:55:291
1048699329,7cyclictest32084-21munin-run08:20:010
1048699323,25cyclictest13025-21diskstats10:20:140
1048699322,25cyclictest11289-21perl10:15:140
326482311,26sleep1321-21users11:10:301
257652311,5sleep00-21swapper/009:26:480
214082311,5sleep10-21swapper/112:08:021
1048799316,4cyclictest81rcu_preempt09:13:021
1048799311,4cyclictest81rcu_preempt12:30:321
1048799311,10cyclictest14440-21grep11:50:131
1048699316,21cyclictest29921-21expr11:05:130
1048699315,13cyclictest14147-21timerandwakeup08:55:300
1048699312,15cyclictest18572-21ssh09:10:000
10486993113,5cyclictest9700-21fschecks_time08:45:160
10486993112,6cyclictest503-21/usr/sbin/munin09:45:290
1048699311,15cyclictest12520-21munin-node07:30:010
1048699311,14cyclictest1877-21cut11:15:260
313482301,5sleep00-21swapper/009:41:040
183532301,5sleep00-21swapper/010:35:100
121962301,3sleep012242-21/usr/sbin/munin08:50:300
1048799307,20cyclictest30723-21fschecks_count08:15:151
1048799303,4cyclictest81rcu_preempt07:50:041
1048799302,4cyclictest81rcu_preempt11:03:261
1048799301,4cyclictest81rcu_preempt09:26:011
1048699309,7cyclictest26132-21iostat_ios12:20:190
1048699305,11cyclictest32372-21open_files11:10:250
1048699302,16cyclictest0-21swapper/008:00:280
1048699302,16cyclictest0-21swapper/008:00:280
1048699302,14cyclictest5795-21irqstats10:00:220
10486993011,6cyclictest3937-21taskset08:30:140
1048699301,14cyclictest11038-21snmpd07:57:470
288452291,5sleep00-21swapper/012:27:070
186702291,5sleep00-21swapper/007:44:440
1048799298,5cyclictest40250irq/92-i91510:00:211
1048799297,9cyclictest11565-21gdbus12:12:151
1048799295,4cyclictest81rcu_preempt12:00:501
1048799293,4cyclictest81rcu_preempt09:55:061
1048799293,4cyclictest81rcu_preempt09:33:451
1048799291,3cyclictest81rcu_preempt10:12:371
1048799291,3cyclictest81rcu_preempt10:12:361
1048699296,11cyclictest0-21swapper/012:40:120
1048699296,11cyclictest0-21swapper/007:49:110
1048699292,13cyclictest6362-21ntp_states08:35:240
1048699291,5cyclictest81rcu_preempt08:10:510
1048699291,4cyclictest81rcu_preempt09:15:030
1048699291,17cyclictest11090-21/usr/sbin/munin11:40:210
1048699291,17cyclictest11090-21/usr/sbin/munin11:40:210
1048699291,15cyclictest16355-21wc11:55:140
1048699291,15cyclictest0-21swapper/012:00:150
1048699291,14cyclictest27931-21/usr/sbin/munin11:00:120
1048699291,13cyclictest2469-21ls09:50:310
10486992910,6cyclictest9760-21ntpdc10:10:230
10486992910,6cyclictest9760-21ntpdc10:10:230
10486992910,6cyclictest13455-21df07:30:110
10486992910,15cyclictest158342chrt11:53:480
53552281,5sleep10-21swapper/112:50:241
51902281,5sleep10-21swapper/108:33:121
51212281,5sleep00-21swapper/011:25:140
322002281,5sleep00-21swapper/008:20:020
294382281,5sleep10-21swapper/109:35:591
280272281,3sleep10-21swapper/108:07:061
255022281,5sleep10-21swapper/110:52:491
239362281,5sleep10-21swapper/109:22:141
202892281,5sleep10-21swapper/107:47:031
18922281,5sleep10-21swapper/112:40:361
177752281,5sleep10-21swapper/110:30:411
137642281,5sleep10-21swapper/111:46:471
118782281,5sleep10-21swapper/111:41:401
118782281,5sleep10-21swapper/111:41:401
1048799286,4cyclictest81rcu_preempt10:25:391
1048799286,12cyclictest40250irq/92-i91507:55:171
1048799285,4cyclictest81rcu_preempt10:35:531
1048799284,8cyclictest7759-21memory10:05:231
1048799283,20cyclictest31367-21munin-run11:10:001
1048799283,18cyclictest15391-21diskstats07:35:151
1048799282,4cyclictest81rcu_preempt08:46:551
1048799281,7cyclictest0-21swapper/112:45:131
10487992815,9cyclictest22-21ksoftirqd/108:41:091
1048799281,4cyclictest81rcu_preempt09:45:481
1048799281,4cyclictest81rcu_preempt09:42:091
10487992813,4cyclictest3286-21runrttasks11:23:521
1048799281,14cyclictest31164-21/usr/sbin/munin12:35:261
1048799281,12cyclictest18551-21cron09:10:001
1048799280,4cyclictest81rcu_preempt11:28:341
1048699284,18cyclictest27614-21python08:05:290
1048699282,14cyclictest0-21swapper/012:33:130
1048699282,14cyclictest0-21swapper/009:32:340
1048699282,14cyclictest0-21swapper/009:11:370
1048699281,14cyclictest22156-21fschecks_count12:10:170
1048699281,14cyclictest21883-21cat07:50:270
1048699281,14cyclictest15556-21sh09:00:190
1048699281,13cyclictest28648-21/usr/sbin/munin09:35:160
10486992810,6cyclictest7142-21aten_r4power_po10:05:120
10486992810,5cyclictest25991-21cpu10:55:120
10486992810,5cyclictest25991-21cpu10:55:110
287552271,5sleep10-21swapper/112:26:111
12382271,5sleep10-21swapper/108:22:181
123412271,5sleep10-21swapper/110:17:581
1048799274,7cyclictest20855-21iostat_ios10:40:221
1048799274,4cyclictest81rcu_preempt08:53:231
1048799273,3cyclictest81rcu_preempt10:21:441
1048799273,13cyclictest40250irq/92-i91508:12:501
1048799272,10cyclictest14001-21ntp_states07:30:221
10487992710,5cyclictest11565-21gdbus09:03:011
1048699279,6cyclictest2789-21cstates12:45:130
1048699272,13cyclictest0-21swapper/010:25:270
1048699271,14cyclictest21230-21taskset12:06:090
1048699271,13cyclictest4911-21fschecks_time12:50:140
261452261,5sleep10-21swapper/108:02:011
261452261,5sleep10-21swapper/108:02:011
1048799269,5cyclictest40250irq/92-i91509:50:311
1048799262,4cyclictest81rcu_preempt08:27:401
1048799262,3cyclictest81rcu_preempt12:19:141
1048799260,3cyclictest81rcu_preempt11:30:181
1048699262,18cyclictest23935-21diskstats12:15:150
1048699261,12cyclictest2225-21dbus-daemon09:20:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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