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2026-04-01 - 08:07

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 Wed Apr 01, 2026 00:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
44109912371214,19cyclictest5381-21ntp_states19:25:251
44099912121172,36cyclictest5562-21mailstats19:25:270
41282574529,30sleep10-21swapper/119:22:381
41422505459,31sleep00-21swapper/019:22:470
1311221420,3sleep0111rcuc/023:24:090
1934221010,8sleep0440999cyclictest00:38:310
160172960,4sleep10-21swapper/100:35:121
81682930,5sleep0440999cyclictest19:30:280
68742930,4sleep06873-21cpu20:55:120
122512870,8sleep1441099cyclictest22:50:021
226722740,7sleep00-21swapper/020:10:180
289742580,5sleep0440999cyclictest00:49:130
210292510,3sleep0111rcuc/000:06:060
4409994821,17cyclictest3-21ksoftirqd/022:53:550
325622450,8sleep0440999cyclictest00:18:500
169482440,4sleep0440999cyclictest23:27:410
4409994323,5cyclictest3-21ksoftirqd/021:26:300
4409994225,6cyclictest3-21ksoftirqd/023:53:230
4409994223,5cyclictest3-21ksoftirqd/022:06:280
4409994222,5cyclictest3-21ksoftirqd/023:42:550
4409994222,5cyclictest3-21ksoftirqd/022:10:350
4409994222,5cyclictest3-21ksoftirqd/021:41:510
4409994124,6cyclictest3-21ksoftirqd/000:28:550
4409994122,8cyclictest3-21ksoftirqd/000:04:250
4409994122,4cyclictest3-21ksoftirqd/000:23:120
4409994121,5cyclictest3-21ksoftirqd/000:34:170
34552410,9sleep0440999cyclictest20:45:170
270172410,5sleep10-21swapper/123:05:121
4409994024,5cyclictest3-21ksoftirqd/022:19:450
4409994022,8cyclictest3-21ksoftirqd/022:37:430
4409994021,4cyclictest3-21ksoftirqd/022:24:240
290542400,4sleep0440999cyclictest23:06:290
440999392,4cyclictest0-21swapper/021:37:560
4409993924,4cyclictest3-21ksoftirqd/022:47:040
4409993923,6cyclictest3-21ksoftirqd/021:34:160
4409993923,5cyclictest3-21ksoftirqd/023:34:310
4409993922,6cyclictest3-21ksoftirqd/023:16:170
4409993922,6cyclictest3-21ksoftirqd/022:00:080
441099381,33cyclictest0-21swapper/122:25:361
440999387,3cyclictest0-21swapper/000:43:160
4409993822,6cyclictest3-21ksoftirqd/022:40:400
4409993822,5cyclictest3-21ksoftirqd/023:57:050
441099373,30cyclictest0-21swapper/123:17:361
440999374,17cyclictest11529-21memory19:40:220
4409993722,5cyclictest3-21ksoftirqd/021:49:540
4409993721,5cyclictest3-21ksoftirqd/021:14:030
4409993720,6cyclictest3-21ksoftirqd/021:55:500
4409993719,8cyclictest3-21ksoftirqd/000:12:320
4409993718,9cyclictest3-21ksoftirqd/022:32:340
227632370,7sleep1441099cyclictest20:10:201
441099366,6cyclictest81rcu_preempt23:03:551
441099366,26cyclictest6404-21fschecks_count22:10:161
441099363,6cyclictest0-21swapper/120:05:561
441099362,31cyclictest0-21swapper/100:31:361
441099362,30cyclictest0-21swapper/100:04:551
440999363,5cyclictest0-21swapper/023:45:160
4409993620,5cyclictest3-21ksoftirqd/023:38:540
4409993620,5cyclictest3-21ksoftirqd/023:12:370
441099351,5cyclictest31651-21ssh23:42:561
4409993519,5cyclictest3-21ksoftirqd/020:42:070
4409993518,6cyclictest3-21ksoftirqd/022:59:330
4409993518,6cyclictest3-21ksoftirqd/019:36:300
159472351,5sleep00-21swapper/019:51:170
441099349,12cyclictest11927-21taskset22:49:471
441099344,4cyclictest81rcu_preempt23:46:581
441099344,4cyclictest81rcu_preempt22:31:481
441099343,28cyclictest0-21swapper/123:20:161
4409993419,5cyclictest3-21ksoftirqd/020:25:130
440999341,19cyclictest18943-21ssh21:50:070
441099335,4cyclictest81rcu_preempt23:56:271
441099334,4cyclictest81rcu_preempt00:12:231
441099333,5cyclictest81rcu_preempt00:41:061
441099333,4cyclictest81rcu_preempt21:28:561
441099333,4cyclictest81rcu_preempt19:37:331
441099333,28cyclictest0-21swapper/121:56:551
4410993323,6cyclictest4891-21ssh22:08:451
441099331,29cyclictest7210-21ssh22:44:561
4409993317,6cyclictest3-21ksoftirqd/021:23:300
4409993314,8cyclictest3-21ksoftirqd/022:29:390
440999331,30cyclictest0-21swapper/000:52:350
440999331,13cyclictest11117-21kernelversion21:05:190
41612331,5sleep14213-21latency_hist21:35:011
275422331,4sleep127552-21ssh00:46:501
441099329,19cyclictest0-21swapper/121:54:001
441099329,19cyclictest0-21swapper/100:16:431
441099324,4cyclictest81rcu_preempt00:25:121
441099323,4cyclictest81rcu_preempt22:03:141
441099323,4cyclictest81rcu_preempt21:12:321
441099323,4cyclictest81rcu_preempt00:22:221
441099323,4cyclictest81rcu_preempt00:05:151
441099321,4cyclictest81rcu_preempt22:59:081
441099321,4cyclictest81rcu_preempt21:16:351
441099321,28cyclictest0-21swapper/119:55:361
4409993224,6cyclictest0-21swapper/023:03:560
4409993217,5cyclictest3-21ksoftirqd/020:15:590
4409993215,6cyclictest3-21ksoftirqd/020:00:060
440999321,29cyclictest0-21swapper/021:00:560
441099318,19cyclictest0-21swapper/123:29:231
441099316,4cyclictest81rcu_preempt19:46:401
441099316,21cyclictest12208-21sh21:10:001
441099316,13cyclictest40550irq/92-i91519:50:241
441099314,4cyclictest81rcu_preempt22:38:581
441099313,4cyclictest81rcu_preempt23:53:011
4410993121,7cyclictest12211-21diskmemload23:12:261
441099311,5cyclictest0-21swapper/121:40:171
441099311,4cyclictest81rcu_preempt21:20:501
441099311,4cyclictest81rcu_preempt20:00:171
4410993113,14cyclictest22-21ksoftirqd/121:36:401
4409993115,6cyclictest3-21ksoftirqd/020:33:480
441099309,17cyclictest0-21swapper/123:30:111
441099301,8cyclictest25262-21ssh23:35:431
441099301,4cyclictest81rcu_preempt20:53:551
441099301,4cyclictest81rcu_preempt20:28:311
440999309,7cyclictest3-21ksoftirqd/021:15:110
440999305,13cyclictest20640-21grep20:05:170
440999303,14cyclictest13543-21ntp_states19:45:230
440999301,17cyclictest17285-21ntp_kernel_pll_19:55:250
441099299,5cyclictest40550irq/92-i91521:02:371
441099299,16cyclictest0-21swapper/120:35:071
441099294,19cyclictest1557-21iostat_ios20:40:191
4410992921,5cyclictest0-21swapper/122:23:351
441099291,4cyclictest81rcu_preempt22:18:361
441099291,26cyclictest0-21swapper/120:15:161
440999292,13cyclictest5325-21perl20:50:160
4409992914,5cyclictest3-21ksoftirqd/020:36:390
4409992910,7cyclictest0-21swapper/020:21:020
296332291,5sleep10-21swapper/120:30:071
82542281,5sleep10-21swapper/120:58:121
441099287,4cyclictest12211-21diskmemload00:50:421
441099281,4cyclictest81rcu_preempt21:47:311
441099281,4cyclictest81rcu_preempt19:32:141
4410992720,5cyclictest0-21swapper/120:45:571
274762271,5sleep10-21swapper/120:23:441
441099259,5cyclictest40550irq/92-i91519:40:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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