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2026-03-17 - 15:14

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 Tue Mar 17, 2026 12:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
165379912641236,25cyclictest0-21swapper/007:26:390
165389910741066,5cyclictest0-21swapper/107:27:021
163842685605,42sleep10-21swapper/107:23:591
164402612568,29sleep00-21swapper/007:24:310
80382910,7sleep11653899cyclictest09:59:301
18622890,8sleep01653799cyclictest11:00:020
99762850,4sleep10-21swapper/108:30:131
72072850,4sleep1211ktimersoftd/111:38:281
13712830,2sleep10-21swapper/111:32:121
226692810,4sleep10-21swapper/110:47:231
36242510,28sleep13614-21ssh09:20:291
204442450,3sleep041ktimersoftd/011:18:510
275052430,31sleep10-21swapper/109:45:291
1653899394,32cyclictest0-21swapper/111:43:151
1653899391,15cyclictest81rcu_preempt11:52:381
98442380,5sleep11653899cyclictest12:48:311
245892381,33sleep124600-21ssh11:55:341
259532371,32sleep125964-21ssh11:24:491
1653899373,31cyclictest0-21swapper/111:03:161
1653799372,22cyclictest11092-21/usr/sbin/munin10:35:220
1653799371,23cyclictest25083-21diskstats10:50:140
1653799371,22cyclictest3482-21grep09:20:280
16537993710,4cyclictest81rcu_preempt09:36:360
1653799369,15cyclictest0-21swapper/010:15:280
1653799361,6cyclictest2538-21fschecks_time11:00:150
16537993610,12cyclictest13734-21ssh12:52:490
159482361,31sleep015962-21ssh11:14:250
149792361,32sleep014991-21ssh10:05:310
1653899356,4cyclictest81rcu_preempt10:35:171
1653899356,4cyclictest81rcu_preempt09:15:301
1653899353,6cyclictest0-21swapper/108:15:561
16538993527,5cyclictest20315-21ssh10:11:141
16538993518,5cyclictest40550irq/92-i91508:04:401
1653799354,4cyclictest81rcu_preempt09:49:030
1653799352,29cyclictest0-21swapper/012:42:160
16537993522,10cyclictest0-21swapper/007:41:550
1653799351,30cyclictest15596-21tune2fs10:40:160
1653799351,11cyclictest0-21swapper/012:14:560
16537993511,12cyclictest3302-21runrttasks12:17:200
289532341,29sleep028966-21sh11:27:090
245622341,4sleep130497-21gdbus07:43:091
172472342,27sleep10-21swapper/108:50:091
1653899345,4cyclictest81rcu_preempt09:25:271
1653899345,4cyclictest81rcu_preempt07:30:461
1653899345,3cyclictest81rcu_preempt10:59:181
1653899344,4cyclictest81rcu_preempt10:44:481
1653899344,4cyclictest81rcu_preempt09:36:461
1653899342,29cyclictest0-21swapper/109:33:161
1653899341,4cyclictest81rcu_preempt09:14:481
1653899341,10cyclictest81rcu_preempt12:30:111
1653799349,13cyclictest12830-21/usr/sbin/munin08:35:290
1653799345,26cyclictest26957-21cron11:59:000
16537993420,5cyclictest3-21ksoftirqd/009:34:270
16537993414,4cyclictest3-21ksoftirqd/012:31:310
1653799341,30cyclictest22354-21ssh10:46:560
16537993412,5cyclictest3-21ksoftirqd/011:42:410
139572341,29sleep114052-21hddtemp_smartct10:05:161
1653899338,21cyclictest0-21swapper/112:26:231
1653899337,4cyclictest81rcu_preempt09:51:311
1653899337,4cyclictest81rcu_preempt09:51:301
1653899334,5cyclictest25716-21ntp_states10:50:261
1653899334,10cyclictest81rcu_preempt12:20:441
1653899333,4cyclictest81rcu_preempt09:43:211
1653899333,28cyclictest0-21swapper/108:40:361
1653899333,28cyclictest0-21swapper/108:40:351
1653899332,4cyclictest81rcu_preempt11:15:331
1653899332,28cyclictest0-21swapper/112:09:151
1653899331,29cyclictest0-21swapper/108:05:161
1653799339,13cyclictest8489-21grep09:25:290
1653799337,22cyclictest0-21swapper/011:49:260
1653799336,23cyclictest0-21swapper/012:08:140
1653799333,17cyclictest0-21swapper/012:20:560
1653799332,4cyclictest0-21swapper/009:58:150
16537993312,5cyclictest3302-21runrttasks10:24:260
16537993311,17cyclictest23138-21ssh09:40:320
7122321,27sleep0726-21ssh12:38:430
316302321,5sleep00-21swapper/012:03:430
301322323,5sleep10-21swapper/107:55:331
240182320,3sleep00-21swapper/012:29:270
1653899323,5cyclictest81rcu_preempt11:13:181
1653899323,4cyclictest81rcu_preempt11:29:181
1653899321,5cyclictest0-21swapper/110:04:351
1653899321,4cyclictest81rcu_preempt12:15:221
1653899321,29cyclictest0-21swapper/112:51:561
1653899321,27cyclictest23549-21tune2fs10:15:161
1653899321,17cyclictest2413-21fschecks_time12:40:161
1653899321,12cyclictest0-21swapper/110:25:171
1653799325,5cyclictest81rcu_preempt08:10:230
1653799323,16cyclictest0-21swapper/011:52:470
16537993225,5cyclictest0-21swapper/012:47:360
1653799322,4cyclictest81rcu_preempt10:11:400
16537993224,6cyclictest0-21swapper/011:38:230
16537993216,5cyclictest3-21ksoftirqd/010:33:240
1653799321,13cyclictest0-21swapper/008:20:420
143222322,5sleep114367-21ntp_states11:45:251
60602310,4sleep1211ktimersoftd/112:10:221
1653899313,4cyclictest81rcu_preempt10:30:411
1653899311,4cyclictest81rcu_preempt09:06:501
16538993114,14cyclictest22-21ksoftirqd/112:03:001
1653799314,4cyclictest81rcu_preempt11:33:400
1653799312,4cyclictest81rcu_preempt09:11:450
16537993117,6cyclictest0-21swapper/011:09:350
16537993112,7cyclictest18925-21munin-node07:30:050
1653799311,27cyclictest0-21swapper/009:18:190
1653799311,10cyclictest184912vmstat08:50:270
130282311,5sleep10-21swapper/108:37:251
303412301,5sleep00-21swapper/007:57:460
224672301,5sleep10-21swapper/107:36:041
1653899303,4cyclictest81rcu_preempt10:20:551
16538993021,6cyclictest0-21swapper/108:48:161
1653899301,4cyclictest81rcu_preempt12:37:261
1653899301,4cyclictest81rcu_preempt11:05:231
1653799308,7cyclictest3191-21ssh09:54:310
1653799308,7cyclictest3191-21ssh09:54:300
16537993023,5cyclictest0-21swapper/007:36:550
16537993022,6cyclictest0-21swapper/007:45:360
1653799302,15cyclictest0-21swapper/008:43:340
1653799302,15cyclictest0-21swapper/008:43:330
16537993011,6cyclictest22227-21kernelversion11:20:210
1653899295,4cyclictest81rcu_preempt09:00:581
16538992922,5cyclictest0-21swapper/108:20:401
16538992916,10cyclictest22-21ksoftirqd/107:52:571
1653799293,13cyclictest4870-21ntp_states08:15:250
1653799292,14cyclictest21821-21ntpq09:00:230
1653799292,14cyclictest10707-21python08:30:280
16537992915,10cyclictest30497-21gdbus10:00:260
1653799291,4cyclictest81rcu_preempt10:26:420
167572281,5sleep00-21swapper/008:46:540
16538992820,5cyclictest0-21swapper/108:57:551
1653799282,15cyclictest28435-21apt-get07:54:270
1653799282,13cyclictest8115-21diskstats08:25:170
16537992810,7cyclictest0-21swapper/008:05:550
16537992810,6cyclictest23165-21df_inode09:05:140
91672271,5sleep10-21swapper/108:26:171
262992271,4sleep10-21swapper/107:46:431
1653799271,13cyclictest19755-21cat08:55:230
1653799271,12cyclictest31435-21/usr/sbin/munin08:00:220
35992261,5sleep10-21swapper/108:12:071
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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