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2026-04-06 - 10:17

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 all highest latencies:
System rack9slot4s (updated Mon Apr 06, 2026 00:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8789912081159,37cyclictest1783-21strings19:25:230
6542627579,33sleep00-21swapper/019:23:130
5212512467,30sleep10-21swapper/119:21:501
87999184179,3cyclictest23082-21kworker/1:019:25:241
1092221030,5sleep187999cyclictest23:25:171
148762750,5sleep014873-21ntpdc21:15:260
65222730,5sleep187999cyclictest22:47:001
156632710,4sleep10-21swapper/122:23:251
288592610,4sleep1211ktimersoftd/122:03:431
297262570,10sleep187999cyclictest00:52:271
169662560,2sleep016965-21sh23:30:580
143372480,2sleep014339-21processes00:35:280
878994524,5cyclictest3-21ksoftirqd/021:39:490
41802451,3sleep04285-21basename20:55:260
191412440,4sleep019142-21fschecks_time20:10:150
878994325,8cyclictest3-21ksoftirqd/023:19:030
87899429,30cyclictest0-21swapper/023:47:160
878994222,5cyclictest3-21ksoftirqd/000:19:370
878994124,6cyclictest3-21ksoftirqd/023:39:330
878994122,5cyclictest3-21ksoftirqd/000:20:350
21482410,4sleep187999cyclictest23:15:401
878994022,8cyclictest3-21ksoftirqd/023:53:050
878994014,4cyclictest0-21swapper/022:38:220
87999395,5cyclictest0-21swapper/100:16:551
87999394,31cyclictest0-21swapper/100:00:551
87999392,33cyclictest0-21swapper/123:22:561
879993923,12cyclictest6783-21awk21:40:231
878993924,4cyclictest3-21ksoftirqd/021:21:010
878993923,5cyclictest3-21ksoftirqd/022:22:120
878993923,5cyclictest3-21ksoftirqd/020:06:040
87999385,29cyclictest0-21swapper/122:52:161
87999385,29cyclictest0-21swapper/122:52:151
878993823,5cyclictest3-21ksoftirqd/023:24:340
878993823,5cyclictest3-21ksoftirqd/022:40:570
878993823,5cyclictest3-21ksoftirqd/022:31:160
878993823,5cyclictest3-21ksoftirqd/021:27:080
878993823,5cyclictest3-21ksoftirqd/020:28:210
878993822,6cyclictest3-21ksoftirqd/022:25:550
878993822,6cyclictest3-21ksoftirqd/019:53:050
878993822,5cyclictest3-21ksoftirqd/022:08:360
878993822,5cyclictest3-21ksoftirqd/000:30:360
878993815,6cyclictest3-21ksoftirqd/023:10:250
878993815,4cyclictest111rcuc/019:55:220
878993722,5cyclictest3-21ksoftirqd/023:25:450
878993721,6cyclictest3-21ksoftirqd/021:57:530
878993721,5cyclictest3-21ksoftirqd/022:04:170
878993720,6cyclictest3-21ksoftirqd/000:51:140
878993720,6cyclictest3-21ksoftirqd/000:13:510
878993713,7cyclictest3-21ksoftirqd/021:10:180
74752370,3sleep1211ktimersoftd/123:55:161
151062371,32sleep015118-21ssh00:03:060
87999362,30cyclictest0-21swapper/121:24:161
87999362,30cyclictest0-21swapper/100:14:551
878993621,5cyclictest3-21ksoftirqd/022:49:430
878993621,5cyclictest3-21ksoftirqd/020:44:340
878993611,6cyclictest3-21ksoftirqd/023:44:310
87999352,7cyclictest0-21swapper/123:35:361
879993521,10cyclictest4342-21ssh21:38:141
87999351,30cyclictest7030-21ssh22:14:561
87999351,30cyclictest11628-21ssh22:19:361
878993521,4cyclictest3-21ksoftirqd/000:49:130
878993520,5cyclictest3-21ksoftirqd/023:56:090
878993520,5cyclictest3-21ksoftirqd/021:07:010
878993519,6cyclictest3-21ksoftirqd/020:48:310
878993519,6cyclictest3-21ksoftirqd/020:31:240
878993518,8cyclictest3-21ksoftirqd/021:40:340
878993515,7cyclictest3-21ksoftirqd/000:05:050
878993513,4cyclictest0-21swapper/020:15:120
878993511,8cyclictest3-21ksoftirqd/021:51:170
878993510,7cyclictest3-21ksoftirqd/022:59:550
317502351,4sleep131764-21ssh23:13:361
290752351,4sleep029159-21iostat21:30:190
87999341,6cyclictest584-21ssh21:34:581
87999341,31cyclictest0-21swapper/121:08:161
87999341,29cyclictest2403-21irqbalance23:07:351
879993410,20cyclictest0-21swapper/122:25:271
87899348,7cyclictest111rcuc/019:45:120
87899342,29cyclictest0-21swapper/000:25:560
87899342,21cyclictest0-21swapper/022:51:150
87899342,21cyclictest0-21swapper/022:51:150
878993419,5cyclictest3-21ksoftirqd/019:41:400
878993412,7cyclictest3-21ksoftirqd/023:00:320
878993410,6cyclictest3-21ksoftirqd/022:11:060
87999334,4cyclictest81rcu_preempt21:53:401
87999332,4cyclictest0-21swapper/122:06:561
87999331,5cyclictest0-21swapper/119:37:361
87999331,30cyclictest0-21swapper/121:27:351
87999331,29cyclictest0-21swapper/120:16:361
87999331,28cyclictest25336-21fschecks_time23:40:151
87899339,12cyclictest20978-21taskset00:42:340
87899334,8cyclictest3-21ksoftirqd/023:07:150
878993319,4cyclictest3-21ksoftirqd/020:22:190
87899331,8cyclictest12126-21unixbench_singl21:45:300
878993311,7cyclictest3-21ksoftirqd/022:18:340
878993311,7cyclictest3-21ksoftirqd/020:53:030
87999325,4cyclictest81rcu_preempt00:07:471
87999324,4cyclictest81rcu_preempt21:58:591
87999322,5cyclictest81rcu_preempt23:49:041
879993225,5cyclictest0-21swapper/100:37:361
87999322,4cyclictest81rcu_preempt23:00:311
879993224,6cyclictest0-21swapper/123:50:161
87999321,4cyclictest81rcu_preempt20:09:101
87999321,4cyclictest81rcu_preempt00:23:001
87999321,29cyclictest0-21swapper/122:57:351
87999321,29cyclictest0-21swapper/121:48:551
84142321,5sleep10-21swapper/100:30:071
87999316,21cyclictest0-21swapper/121:19:211
87999314,20cyclictest26091-21munin-run20:30:001
87999313,4cyclictest81rcu_preempt22:38:251
87999311,28cyclictest0-21swapper/121:12:591
87999311,12cyclictest95132grep19:45:121
165642311,5sleep00-21swapper/020:03:560
87999304,4cyclictest81rcu_preempt21:03:091
87999303,4cyclictest81rcu_preempt22:31:411
87999302,4cyclictest81rcu_preempt00:45:471
87999302,24cyclictest4450-21memory00:25:221
879993021,5cyclictest22858-21cut20:20:151
879993020,6cyclictest13856-21ntp_kernel_err19:55:221
879993019,7cyclictest16141-21grep23:30:231
87999301,4cyclictest81rcu_preempt22:43:381
87999301,4cyclictest81rcu_preempt20:53:031
878993017,4cyclictest3-21ksoftirqd/019:38:100
878993010,6cyclictest3-21ksoftirqd/021:03:100
89762291,5sleep10-21swapper/119:43:131
87999293,4cyclictest81rcu_preempt19:30:331
879992917,9cyclictest22-21ksoftirqd/100:42:061
87899296,13cyclictest3213-21irqstats19:30:020
296582291,5sleep10-21swapper/120:38:171
87999284,17cyclictest3610-21diskstats20:55:131
165142281,5sleep10-21swapper/120:03:231
124892281,5sleep10-21swapper/119:50:451
879992716,7cyclictest27346-21ls20:30:291
87999271,4cyclictest81rcu_preempt20:43:411
87899272,12cyclictest28947-21ntp_states20:35:260
202092271,5sleep10-21swapper/120:12:491
87999249,11cyclictest0-21swapper/120:45:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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