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2026-08-06 - 20:01

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 Thu Aug 06, 2026 12:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
285079912461205,37cyclictest28180-21kworker/0:307:25:090
285089911501141,6cyclictest0-21swapper/107:25:081
285089911001091,6cyclictest29467-21diskstats08:50:141
280962630583,31sleep10-21swapper/107:21:151
284112627580,31sleep00-21swapper/007:24:350
2850799239229,7cyclictest0-21swapper/008:50:140
2850799651,25cyclictest24286-21/usr/sbin/munin08:35:240
2850799523,7cyclictest15584-21diskstats11:05:140
2850799519,6cyclictest25653-21iostat_ios10:05:210
2850799493,5cyclictest10851-21fschecks_time08:00:170
2850799489,18cyclictest212242chrt08:27:200
2850799482,12cyclictest12174-21df09:30:140
2850799472,15cyclictest0-21swapper/008:06:110
28507994719,5cyclictest20402-21cron12:45:000
2850799359,11cyclictest0-21swapper/011:30:170
2850799353,16cyclictest18498-21irqstats08:20:200
2850799351,21cyclictest5032-21ls10:35:270
2850799351,16cyclictest0-21swapper/011:57:130
28508993413,6cyclictest0-21swapper/109:36:411
2850799341,21cyclictest13278-21grep11:00:010
2850899331,19cyclictest8341-21/usr/sbin/munin10:45:191
2850799336,14cyclictest0-21swapper/009:41:310
28507993313,7cyclictest29088-21df10:15:130
90662321,5sleep10-21swapper/112:14:351
90662321,5sleep10-21swapper/112:14:341
28508993214,6cyclictest22-21ksoftirqd/109:45:281
2850799327,12cyclictest2680-21wc07:40:000
268292321,4sleep126843-21df_inode11:35:121
222432321,4sleep122247-21irqstats08:30:191
222432321,4sleep122247-21irqstats08:30:191
87752318,19sleep10-21swapper/107:55:171
2850899312,25cyclictest23404-21iostat_ios11:25:191
2850799316,13cyclictest0-21swapper/008:34:190
2850799316,13cyclictest0-21swapper/008:34:190
2850799312,16cyclictest17482-21/usr/sbin/munin12:35:210
2850799312,14cyclictest18573-21ls09:45:280
177602310,5sleep1201rcuc/108:20:011
32782301,3sleep10-21swapper/111:58:141
2850899304,19cyclictest29058-21iostat_ios11:40:191
28508993023,5cyclictest22-21ksoftirqd/110:00:281
28508993016,8cyclictest4589-21iostat_ios10:35:191
2850899301,5cyclictest81rcu_preempt07:38:121
2850899301,4cyclictest81rcu_preempt12:48:231
28508993013,5cyclictest22-21ksoftirqd/109:20:011
2850799307,11cyclictest8234-21ntpq12:10:260
2850799307,11cyclictest8234-21ntpq12:10:260
2850799303,15cyclictest0-21swapper/009:06:130
2850799302,16cyclictest0-21swapper/009:01:010
2850799301,4cyclictest81rcu_preempt12:16:430
28507993012,6cyclictest23946-21/usr/sbin/munin11:25:280
2850799301,26cyclictest23237-21aten_r4power_po10:00:110
28507993012,5cyclictest413-21diskstats10:25:140
28507993011,6cyclictest31230-21aten_r4power_en07:30:100
28507993011,5cyclictest6512-21df09:15:110
28507993011,5cyclictest6512-21df09:15:100
207572300,8sleep00-21swapper/012:45:110
80762291,5sleep10-21swapper/107:52:361
2850899295,4cyclictest81rcu_preempt11:49:511
2850899295,4cyclictest81rcu_preempt10:30:461
2850899295,4cyclictest81rcu_preempt09:51:231
2850899294,4cyclictest81rcu_preempt08:09:281
2850899294,21cyclictest10585-21if_eth009:25:191
2850899292,5cyclictest81rcu_preempt10:28:301
2850899291,6cyclictest0-21swapper/107:45:301
2850899291,6cyclictest0-21swapper/107:45:291
28508992916,8cyclictest24121-21iostat_ios08:35:211
2850899291,4cyclictest81rcu_preempt10:41:451
28508992911,6cyclictest32423-21sh10:25:011
28508992910,15cyclictest31604-21cat08:55:181
2850799298,8cyclictest0-21swapper/011:40:190
2850799292,15cyclictest22759-21/usr/sbin/munin12:50:140
2850799292,14cyclictest6090-21munin-run09:14:590
2850799292,14cyclictest0-21swapper/009:21:590
2850799292,13cyclictest3116-21df07:40:120
2850799291,5cyclictest0-21swapper/011:00:220
2850799291,4cyclictest81rcu_preempt11:10:040
28507992912,5cyclictest7429-21ntp_states07:50:250
28507992911,6cyclictest5004-21df07:45:130
28507992911,6cyclictest5004-21df07:45:120
28507992911,6cyclictest28471-21taskset10:13:140
28507992911,5cyclictest5810-21df_inode12:05:140
220182291,5sleep10-21swapper/109:55:251
162812291,5sleep10-21swapper/112:31:201
133062291,5sleep10-21swapper/109:32:001
108122291,5sleep10-21swapper/112:18:111
99212281,5sleep00-21swapper/007:57:140
56652281,5sleep10-21swapper/109:10:491
52842281,5sleep10-21swapper/112:04:171
43842281,4sleep10-21swapper/107:43:111
38652281,5sleep10-21swapper/109:06:391
2850899289,7cyclictest28774-21seq08:47:351
2850899287,10cyclictest40250irq/92-i91511:00:221
2850899284,17cyclictest15955-21diskstats09:40:141
2850899282,11cyclictest0-21swapper/111:32:051
2850899281,4cyclictest81rcu_preempt10:52:391
2850899281,4cyclictest81rcu_preempt08:28:591
28508992811,14cyclictest22-21ksoftirqd/110:18:241
2850799289,5cyclictest32231-21grep08:55:270
2850799288,17cyclictest0-21swapper/008:40:030
2850799286,12cyclictest17310-21taskset08:15:510
2850799285,11cyclictest0-21swapper/010:30:150
2850799281,22cyclictest21823-21processes11:20:260
28507992812,14cyclictest0-21swapper/011:52:310
28507992811,5cyclictest19321-21df11:15:140
2850799281,15cyclictest15205-21runrttasks09:37:130
28507992811,5cyclictest14344-21taskset12:25:400
2850799281,14cyclictest7763-21/usr/sbin/munin10:45:190
28507992810,5cyclictest27616-21fschecks_count08:45:140
282862281,5sleep10-21swapper/110:11:221
279702281,5sleep00-21swapper/011:36:570
267152281,5sleep10-21swapper/110:09:331
209772281,5sleep00-21swapper/009:53:350
200402281,5sleep10-21swapper/112:41:141
194282281,5sleep10-21swapper/108:23:091
181992281,5sleep10-21swapper/112:36:481
166862281,5sleep10-21swapper/111:06:471
145372281,5sleep10-21swapper/112:27:411
120192281,5sleep10-21swapper/108:04:211
111672281,5sleep10-21swapper/112:20:071
2850899272,4cyclictest81rcu_preempt08:41:571
28508992717,6cyclictest22-21ksoftirqd/112:06:541
2850899271,14cyclictest1692-21tail09:00:281
2850799278,6cyclictest0-21swapper/010:40:070
2850799272,13cyclictest2225-21dbus-daemon10:51:350
2850799272,13cyclictest0-21swapper/008:14:470
2850799272,12cyclictest10290-21df09:25:120
2850799271,18cyclictest0-21swapper/012:01:380
2850799271,13cyclictest22372-21ls09:55:300
2850799271,13cyclictest11565-21gdbus11:45:530
225282271,5sleep10-21swapper/111:23:491
205452271,5sleep10-21swapper/111:17:551
155742271,5sleep10-21swapper/108:12:191
2850899264,4cyclictest81rcu_preempt11:14:051
2850899263,6cyclictest0-21swapper/109:15:211
2850899263,6cyclictest0-21swapper/109:15:211
2850899261,4cyclictest81rcu_preempt10:56:291
2850799268,6cyclictest32337-21seq10:24:100
28507992622,2cyclictest0-21swapper/012:20:080
28507992617,6cyclictest15140-21cpuspeed_turbos12:30:110
2850899257,6cyclictest31236-21aten_r4power_en07:30:101
2850899252,9cyclictest22759-21df12:50:131
28508992510,3cyclictest0-21swapper/111:50:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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