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2026-03-29 - 14:55

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 Sun Mar 29, 2026 12:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
182569912431234,6cyclictest0-21swapper/107:27:551
182559912131189,6cyclictest0-21swapper/007:27:260
181042486442,29sleep00-21swapper/007:24:010
180582464418,31sleep10-21swapper/107:23:321
251902990,10sleep01825599cyclictest10:48:410
82072860,4sleep01825599cyclictest11:37:380
275332840,4sleep00-21swapper/011:57:350
291782750,4sleep1211ktimersoftd/110:19:421
321872630,3sleep041ktimersoftd/012:02:180
68682550,3sleep1211ktimersoftd/112:10:111
18255994721,10cyclictest3-21ksoftirqd/012:29:100
18255994523,5cyclictest3-21ksoftirqd/011:02:250
18255994323,5cyclictest3-21ksoftirqd/010:15:480
18255994318,7cyclictest3-21ksoftirqd/009:57:400
18255994224,5cyclictest3-21ksoftirqd/010:21:230
18255994222,5cyclictest3-21ksoftirqd/012:33:080
18255994221,5cyclictest3-21ksoftirqd/010:57:010
18255994221,5cyclictest3-21ksoftirqd/010:57:000
18255994221,5cyclictest3-21ksoftirqd/009:29:540
18255994211,27cyclictest2309-21cron12:50:000
288442410,4sleep0111rcuc/009:45:200
18255994125,5cyclictest3-21ksoftirqd/011:25:120
18255994124,6cyclictest3-21ksoftirqd/012:10:380
18255994122,4cyclictest3-21ksoftirqd/010:25:520
18255994112,7cyclictest3-21ksoftirqd/011:31:410
268282400,3sleep041ktimersoftd/009:43:260
18255994023,6cyclictest3-21ksoftirqd/007:41:470
18255994019,5cyclictest3-21ksoftirqd/011:41:380
18255994019,5cyclictest3-21ksoftirqd/010:42:340
18255994013,7cyclictest3-21ksoftirqd/012:19:380
1825699395,5cyclictest81rcu_preempt10:58:391
1825699395,5cyclictest81rcu_preempt10:58:381
18255993929,7cyclictest0-21swapper/009:11:160
18255993924,4cyclictest3-21ksoftirqd/010:00:290
18255993923,6cyclictest3-21ksoftirqd/008:09:130
18255993923,5cyclictest3-21ksoftirqd/012:50:550
18255993922,6cyclictest3-21ksoftirqd/009:02:230
18255993921,8cyclictest3-21ksoftirqd/009:33:450
18255993920,8cyclictest3-21ksoftirqd/009:20:350
18255993919,5cyclictest3-21ksoftirqd/012:38:340
18255993918,5cyclictest3-21ksoftirqd/011:16:340
1825699383,30cyclictest0-21swapper/111:00:151
1825599387,28cyclictest0-21swapper/012:07:560
18255993824,4cyclictest3-21ksoftirqd/010:30:290
18255993823,4cyclictest3-21ksoftirqd/010:07:500
18255993822,6cyclictest3-21ksoftirqd/011:08:350
18255993822,6cyclictest3-21ksoftirqd/009:51:140
18255993821,6cyclictest3-21ksoftirqd/010:10:350
18255993818,5cyclictest3-21ksoftirqd/010:35:080
18255993722,5cyclictest3-21ksoftirqd/011:12:320
18255993722,5cyclictest3-21ksoftirqd/007:31:340
18255993721,5cyclictest3-21ksoftirqd/009:15:380
18255993721,4cyclictest3-21ksoftirqd/009:39:070
18255993719,6cyclictest3-21ksoftirqd/009:06:310
18255993716,6cyclictest3-21ksoftirqd/011:51:520
87052362,30sleep10-21swapper/111:05:141
227282360,3sleep181rcu_preempt07:35:011
1825699362,30cyclictest0-21swapper/110:02:151
18255993628,4cyclictest0-21swapper/008:40:150
18255993620,6cyclictest3-21ksoftirqd/011:49:280
18255993619,6cyclictest3-21ksoftirqd/010:51:050
18255993615,6cyclictest32747-21df08:00:140
243822351,30sleep124396-21ssh10:14:481
1825699356,5cyclictest81rcu_preempt11:45:121
18256993526,5cyclictest9755-21sshd09:59:351
18256993526,5cyclictest14098-21ssh09:30:151
18256993524,7cyclictest24988-21ssh11:55:161
1825699352,30cyclictest0-21swapper/110:44:151
1825699351,30cyclictest25245-21hddtemp_smartct07:40:161
18255993520,5cyclictest3-21ksoftirqd/008:31:240
18255993513,6cyclictest3-21ksoftirqd/012:40:160
61862341,4sleep15283-21/usr/sbin/munin11:35:241
29972340,5sleep1201rcuc/112:05:271
1825699343,29cyclictest0-21swapper/109:25:361
1825699341,4cyclictest20557-21ssh12:24:161
18256993410,8cyclictest22-21ksoftirqd/110:47:071
18255993419,5cyclictest3-21ksoftirqd/008:54:190
18255993416,5cyclictest3-21ksoftirqd/012:23:000
1825599341,20cyclictest29328-21runrttasks07:50:230
1825699335,4cyclictest81rcu_preempt10:37:481
1825699335,4cyclictest81rcu_preempt09:15:481
1825699335,24cyclictest0-21swapper/111:44:541
1825699334,4cyclictest81rcu_preempt12:29:531
1825699334,4cyclictest81rcu_preempt09:23:391
1825699333,4cyclictest81rcu_preempt12:35:061
1825699333,4cyclictest81rcu_preempt10:07:091
18256993325,6cyclictest0-21swapper/108:31:161
18255993318,5cyclictest3-21ksoftirqd/011:22:590
1825599331,30cyclictest0-21swapper/008:55:360
1825599331,30cyclictest0-21swapper/008:21:160
1825599331,29cyclictest0-21swapper/008:10:360
1825599331,19cyclictest6258-21hddtemp_smartct08:15:160
1825699324,24cyclictest0-21swapper/110:32:141
1825699323,4cyclictest81rcu_preempt12:31:401
18256993225,4cyclictest0-21swapper/109:13:361
18256993223,6cyclictest0-21swapper/109:40:581
1825699321,4cyclictest81rcu_preempt10:51:561
1825699321,4cyclictest81rcu_preempt10:23:251
1825699321,29cyclictest0-21swapper/111:16:151
1825699320,6cyclictest81rcu_preempt12:48:471
111802321,5sleep00-21swapper/008:29:210
283392310,5sleep1201rcuc/109:45:121
21932311,4sleep12197-21diskstats08:05:161
1825699315,23cyclictest0-21swapper/112:04:381
1825699313,4cyclictest81rcu_preempt11:14:271
1825699312,4cyclictest81rcu_preempt12:15:551
1825699312,4cyclictest81rcu_preempt09:37:191
18256993123,6cyclictest0-21swapper/111:32:161
1825699311,28cyclictest0-21swapper/110:27:361
1825699311,27cyclictest0-21swapper/108:49:351
1825699311,17cyclictest25163-21ssh11:21:201
1825699311,11cyclictest0-21swapper/109:51:531
18255993115,6cyclictest3-21ksoftirqd/007:56:150
1825699305,4cyclictest81rcu_preempt11:50:531
1825699304,20cyclictest4487-21iostat_ios08:10:201
1825699303,24cyclictest0-21swapper/107:36:041
18256993024,3cyclictest0-21swapper/108:15:161
18256993023,5cyclictest0-21swapper/111:27:361
18256993020,6cyclictest7879-21ssh12:44:591
1825699301,5cyclictest0-21swapper/108:24:351
1825699301,3cyclictest81rcu_preempt08:59:541
1825599301,8cyclictest23928-21switchtime07:35:310
1825599301,5cyclictest0-21swapper/008:45:160
16932301,5sleep10-21swapper/108:04:421
149572301,5sleep00-21swapper/008:39:360
111412301,5sleep10-21swapper/108:28:581
262402291,5sleep10-21swapper/109:09:251
1825699295,17cyclictest12849-21diskstats12:50:131
1825699292,4cyclictest81rcu_preempt07:52:221
319572281,5sleep10-21swapper/107:56:401
1825699285,4cyclictest81rcu_preempt08:54:221
1825699283,4cyclictest81rcu_preempt07:45:271
1825699283,4cyclictest81rcu_preempt07:45:271
165992281,5sleep10-21swapper/108:41:591
1825699271,4cyclictest81rcu_preempt09:04:251
146472271,5sleep10-21swapper/108:36:211
1825599261,14cyclictest0-21swapper/007:49:340
1825599261,14cyclictest0-21swapper/007:49:340
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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