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2026-01-07 - 18:02

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 792 highest latencies:
System rack9slot4s (updated Wed Jan 07, 2026 12:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
107249912421208,29cyclictest19065-21cat07:45:011
107249911751166,6cyclictest0-21swapper/107:25:111
107239911041075,26cyclictest10864-21sshd07:25:090
104912602518,70sleep10-21swapper/107:23:111
104912602518,70sleep10-21swapper/107:23:101
105972447354,30sleep00-21swapper/007:24:170
105972447354,30sleep00-21swapper/007:24:160
1072399200184,12cyclictest0-21swapper/007:45:020
160542870,4sleep1201rcuc/109:40:121
38942830,5sleep13877-21ssh10:00:261
263332800,2sleep00-21swapper/011:30:230
235642650,4sleep023566-21unixbench_singl12:00:300
197242450,3sleep1201rcuc/109:10:201
314822440,4sleep11072499cyclictest12:42:321
32042430,4sleep0111rcuc/012:47:090
277722435,6sleep03-21ksoftirqd/010:59:070
1072499431,38cyclictest5267-21ssh11:09:151
10723994222,5cyclictest3-21ksoftirqd/012:34:150
319002411,13sleep031902-21ssh09:55:400
10723994124,6cyclictest3-21ksoftirqd/011:17:120
10723994124,6cyclictest3-21ksoftirqd/011:17:110
10723994124,6cyclictest3-21ksoftirqd/010:41:540
10723994123,8cyclictest3-21ksoftirqd/010:32:070
10723994121,9cyclictest3-21ksoftirqd/010:20:390
10723994120,10cyclictest3-21ksoftirqd/010:01:280
10723994023,6cyclictest3-21ksoftirqd/009:10:470
10723994021,8cyclictest3-21ksoftirqd/012:21:180
10723994021,6cyclictest3-21ksoftirqd/011:04:340
10723994017,12cyclictest3-21ksoftirqd/011:47:190
10723994014,10cyclictest3-21ksoftirqd/012:05:180
1072499394,32cyclictest15254-21kworker/u4:210:32:061
10723993922,6cyclictest3-21ksoftirqd/008:38:270
10723993921,8cyclictest3-21ksoftirqd/012:19:580
10723993921,8cyclictest3-21ksoftirqd/009:27:550
10723993920,8cyclictest3-21ksoftirqd/012:29:350
10723993920,8cyclictest3-21ksoftirqd/011:11:190
10723993920,8cyclictest3-21ksoftirqd/009:50:350
10723993917,12cyclictest3-21ksoftirqd/010:17:320
10723993915,8cyclictest3-21ksoftirqd/009:32:560
10723993915,6cyclictest3-21ksoftirqd/012:10:120
10723993912,7cyclictest3-21ksoftirqd/009:16:490
10723993912,6cyclictest3-21ksoftirqd/011:55:270
10723993822,6cyclictest3-21ksoftirqd/008:21:090
10723993822,5cyclictest3-21ksoftirqd/007:59:250
10723993821,6cyclictest3-21ksoftirqd/010:38:330
10723993821,6cyclictest3-21ksoftirqd/008:00:510
1072399382,12cyclictest0-21swapper/008:15:300
10723993818,9cyclictest3-21ksoftirqd/009:21:220
10723993818,8cyclictest3-21ksoftirqd/012:37:560
10723993817,9cyclictest3-21ksoftirqd/011:38:530
90702371,31sleep19072-21ssh09:32:381
167482371,32sleep030497-21gdbus09:03:190
1072499373,30cyclictest0-21swapper/109:49:551
1072399374,5cyclictest0-21swapper/011:52:560
10723993722,5cyclictest3-21ksoftirqd/010:07:210
10723993722,5cyclictest3-21ksoftirqd/008:45:180
10723993722,5cyclictest3-21ksoftirqd/008:45:170
10723993722,5cyclictest3-21ksoftirqd/008:32:530
10723993721,5cyclictest3-21ksoftirqd/008:43:430
10723993719,8cyclictest3-21ksoftirqd/011:07:230
10723993715,7cyclictest3-21ksoftirqd/009:40:110
316642361,30sleep131674-21ssh09:22:341
1072499367,4cyclictest81rcu_preempt11:00:001
1072499366,4cyclictest81rcu_preempt10:47:201
1072499366,27cyclictest12158-21cron11:50:001
10723993621,5cyclictest3-21ksoftirqd/012:40:490
10723993621,5cyclictest3-21ksoftirqd/010:47:220
10723993621,5cyclictest3-21ksoftirqd/009:35:590
10723993620,5cyclictest3-21ksoftirqd/012:50:090
10723993618,8cyclictest3-21ksoftirqd/011:25:550
10723993617,9cyclictest3-21ksoftirqd/011:40:450
10723993617,8cyclictest3-21ksoftirqd/010:52:350
10723993617,8cyclictest3-21ksoftirqd/010:28:010
10723993615,6cyclictest3-21ksoftirqd/011:20:120
10723993613,6cyclictest3-21ksoftirqd/009:45:170
198412351,5sleep119857-21ntp_states12:30:251
1072499358,4cyclictest81rcu_preempt12:15:231
1072499355,4cyclictest81rcu_preempt10:35:261
1072499352,5cyclictest0-21swapper/110:17:151
10723993519,8cyclictest3-21ksoftirqd/010:13:260
295002341,4sleep129514-21ssh11:34:191
257892341,29sleep125803-21ssh12:36:211
1072499343,4cyclictest81rcu_preempt12:10:141
10724993427,3cyclictest0-21swapper/112:29:551
1072499341,29cyclictest30686-21diskstats09:55:151
10723993417,5cyclictest3-21ksoftirqd/007:52:140
314192332,27sleep10-21swapper/111:02:221
22142331,4sleep12223-21diskstats08:25:141
201302331,4sleep120189-21sh10:50:281
1072499337,4cyclictest81rcu_preempt11:55:281
1072499334,9cyclictest0-21swapper/109:27:431
1072499334,5cyclictest81rcu_preempt12:01:181
1072499334,4cyclictest81rcu_preempt09:50:361
1072499334,25cyclictest11363-21fschecks_count09:35:161
10724993320,9cyclictest22-21ksoftirqd/111:17:121
10724993320,9cyclictest22-21ksoftirqd/111:17:121
1072499331,4cyclictest81rcu_preempt12:55:001
1072499331,13cyclictest119682sh10:09:341
10723993318,5cyclictest3-21ksoftirqd/007:38:030
1072499325,5cyclictest81rcu_preempt11:20:151
1072499324,4cyclictest81rcu_preempt11:42:521
1072499324,4cyclictest81rcu_preempt11:11:331
1072499324,20cyclictest26654-21mandb08:05:021
1072499322,6cyclictest0-21swapper/112:08:061
1072499322,4cyclictest81rcu_preempt11:28:091
1072499321,9cyclictest24615-21iostat_ios09:15:211
1072499321,4cyclictest0-21swapper/108:32:561
10723993212,9cyclictest29920-21grep08:10:290
10724993123,5cyclictest22-21ksoftirqd/108:55:581
1072499311,6cyclictest15203-21ssh10:12:141
1072499311,4cyclictest81rcu_preempt12:21:551
1072499311,4cyclictest81rcu_preempt10:25:221
1072499311,3cyclictest81rcu_preempt10:20:361
1072499311,28cyclictest0-21swapper/107:38:151
10724993111,4cyclictest81rcu_preempt12:45:171
10723993115,5cyclictest40550irq/92-i91508:25:220
1072399311,28cyclictest0-21swapper/008:50:560
1072499304,4cyclictest81rcu_preempt08:53:541
1072499303,5cyclictest81rcu_preempt11:39:441
1072499303,4cyclictest81rcu_preempt10:40:361
1072499302,4cyclictest81rcu_preempt11:50:091
1072499301,5cyclictest81rcu_preempt08:15:211
1072499301,3cyclictest0-21swapper/107:50:151
1072399309,9cyclictest17186-21wget09:05:120
1072399303,9cyclictest15129-21pidof07:34:590
1072399301,6cyclictest356-21udevd08:05:020
1072399301,27cyclictest0-21swapper/007:46:550
1072499294,18cyclictest13707-21diskstats07:30:171
1072499292,24cyclictest22-21ksoftirqd/108:23:401
1072499291,24cyclictest20553-21chrt07:47:221
10723992913,5cyclictest13778-21fschecks_time08:55:170
90092281,5sleep10-21swapper/108:41:071
261132281,5sleep10-21swapper/108:01:291
183962281,4sleep10-21swapper/109:05:591
1072499285,4cyclictest81rcu_preempt09:02:131
1072499271,5cyclictest81rcu_preempt08:45:121
1072499271,5cyclictest81rcu_preempt08:45:111
1072499271,4cyclictest81rcu_preempt08:10:291
1072499262,18cyclictest6060-21df08:35:131
10724992518,4cyclictest22-21ksoftirqd/107:55:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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