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2026-04-01 - 04:25

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

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 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
Compare latency of primary with shadow system
Characteristics of the highest latencies:
System rack3slot6s.osadl.org (updated Wed Apr 01, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8972211895,18sleep30-21swapper/319:07:503
9062211494,15sleep10-21swapper/119:09:011
8388210986,18sleep00-21swapper/019:05:350
904329988,6sleep20-21swapper/219:08:452
185292800,0sleep10-21swapper/122:09:551
115992610,1sleep111598-21ssh23:43:231
222832560,0sleep00-21swapper/023:20:170
916799231,3cyclictest31935-21ssh21:50:121
72862220,0sleep30-21swapper/323:39:093
167442220,0sleep20-21swapper/222:07:082
916999200,18cyclictest0-21swapper/300:10:073
916799200,2cyclictest0-21swapper/121:40:091
916999190,17cyclictest0-21swapper/321:20:123
72032190,0sleep10-21swapper/123:05:111
916899181,15cyclictest16670-21ssh22:40:232
916799180,16cyclictest0-21swapper/100:30:111
261032180,0sleep00-21swapper/022:16:410
9169991714,2cyclictest17459-21kworker/u8:020:01:053
9169991714,2cyclictest17459-21kworker/u8:020:01:043
916899173,2cyclictest0-21swapper/222:45:042
9168991714,2cyclictest17459-21kworker/u8:020:36:052
9167991712,3cyclictest0-21swapper/123:10:431
916799170,15cyclictest0-21swapper/122:46:021
9166991714,2cyclictest30384-21kworker/u8:123:36:050
279622170,0sleep20-21swapper/221:11:412
916999160,14cyclictest0-21swapper/321:29:593
916899161,3cyclictest22139-21interrupts00:30:152
9168991613,2cyclictest30384-21kworker/u8:123:43:042
9168991613,2cyclictest23625-21kworker/u8:221:18:052
9168991613,2cyclictest13031-21kworker/u8:200:03:052
916899161,13cyclictest0-21swapper/222:56:042
916799161,3cyclictest13367-21ssh22:04:231
9167991611,3cyclictest0-21swapper/121:46:531
9166991613,2cyclictest22079-21kworker/u8:100:02:050
916699160,2cyclictest0-21swapper/022:55:050
916999159,4cyclictest8531-21ssh23:05:453
916999153,10cyclictest24703-21kworker/3:121:15:533
9169991511,2cyclictest32034-21kworker/u8:022:22:053
916999151,12cyclictest0-21swapper/323:20:073
916999151,12cyclictest0-21swapper/320:21:033
9169991510,3cyclictest0-21swapper/319:20:183
916999150,3cyclictest0-21swapper/322:15:133
9168991512,2cyclictest9577-21kworker/u8:122:38:022
9168991512,2cyclictest9577-21kworker/u8:122:34:042
9168991512,2cyclictest7329-21kworker/u8:200:36:052
9168991512,2cyclictest4371-21kworker/u8:220:26:042
9168991512,2cyclictest28927-21kworker/u8:223:06:052
9168991512,2cyclictest23625-21kworker/u8:221:32:042
9168991512,2cyclictest17459-21kworker/u8:020:11:052
9168991512,2cyclictest17459-21kworker/u8:020:04:052
9168991512,2cyclictest17459-21kworker/u8:020:04:042
9168991512,2cyclictest16807-21kworker/u8:223:19:042
9168991512,2cyclictest15492-21kworker/u8:121:57:042
9168991512,2cyclictest15492-21kworker/u8:121:48:052
9168991512,2cyclictest0-21swapper/223:52:132
916899151,13cyclictest845-21ssh23:31:422
916899150,14cyclictest0-21swapper/219:46:022
916799151,12cyclictest29221-21sh00:01:451
916799150,13cyclictest30746-21latency22:55:181
916799150,13cyclictest0-21swapper/122:28:331
916799150,13cyclictest0-21swapper/122:20:001
916799150,13cyclictest0-21swapper/120:05:131
916699150,13cyclictest14183-21taskset21:30:590
916999149,3cyclictest18847-21ssh23:50:253
916999149,3cyclictest0-21swapper/321:40:073
916999142,6cyclictest0-21swapper/321:54:593
916999141,2cyclictest32653-21ssh22:57:173
9169991411,2cyclictest9099-21kworker/u8:021:30:023
9169991411,2cyclictest6898-21kworker/u8:219:27:053
9169991411,2cyclictest11598-21kworker/u8:123:13:053
9169991410,2cyclictest9372-21munin-node3
916999140,2cyclictest0-21swapper/322:02:543
916999140,12cyclictest19563-21sh21:36:183
916999140,12cyclictest18115-21ssh22:09:163
916999140,12cyclictest0-21swapper/300:26:093
9168991411,2cyclictest7329-21kworker/u8:200:24:042
9168991411,2cyclictest6898-21kworker/u8:219:52:052
9168991411,2cyclictest6898-21kworker/u8:219:34:042
9168991411,2cyclictest4371-21kworker/u8:220:22:052
9168991411,2cyclictest32034-21kworker/u8:022:15:052
9168991411,2cyclictest31668-21kworker/u8:000:11:052
9168991411,2cyclictest27718-21kworker/u8:119:57:042
9168991411,2cyclictest17459-21kworker/u8:020:44:042
9168991411,2cyclictest17459-21kworker/u8:020:34:022
9168991411,2cyclictest17459-21kworker/u8:019:41:042
9168991411,2cyclictest15492-21kworker/u8:121:40:042
9168991411,2cyclictest15492-21kworker/u8:121:38:052
9168991411,2cyclictest0-21swapper/223:35:432
916899140,2cyclictest0-21swapper/222:12:022
916899140,2cyclictest0-21swapper/222:00:022
916899140,2cyclictest0-21swapper/200:25:052
916899140,13cyclictest0-21swapper/223:25:232
916899140,13cyclictest0-21swapper/223:13:132
916899140,13cyclictest0-21swapper/223:00:432
916899140,13cyclictest0-21swapper/223:00:432
916899140,13cyclictest0-21swapper/222:24:022
916799149,3cyclictest2492-21latency_hist21:19:591
916799149,3cyclictest21854-21diskstats21:00:161
916799141,2cyclictest14428-21cut20:40:271
9167991411,2cyclictest0-21swapper/121:34:121
9167991411,2cyclictest0-21swapper/100:07:121
9167991410,2cyclictest0-21swapper/123:31:091
916799140,2cyclictest0-21swapper/100:11:361
916799140,12cyclictest11654-21sh00:19:431
9166991411,2cyclictest15578-21kworker/u8:222:45:040
916699140,2cyclictest0-21swapper/019:36:030
916699140,13cyclictest0-21swapper/019:56:040
916699140,12cyclictest15210-21apt-get19:25:060
916699140,12cyclictest0-21swapper/022:05:220
260962140,3sleep10-21swapper/119:50:161
916999138,3cyclictest492-21ssh00:07:223
9169991310,2cyclictest9577-21kworker/u8:122:39:033
9169991310,2cyclictest4290-21kworker/u8:222:33:043
9169991310,2cyclictest30936-21apt-get23:30:103
9169991310,2cyclictest17466-21apt-get19:30:123
9169991310,2cyclictest0-21swapper/322:51:173
9169991310,2cyclictest0-21swapper/322:44:533
9169991310,2cyclictest0-21swapper/322:14:143
9169991310,2cyclictest0-21swapper/321:12:483
9169991310,2cyclictest0-21swapper/321:00:183
916999130,2cyclictest0-21swapper/322:45:053
916999130,12cyclictest0-21swapper/322:25:543
916999130,12cyclictest0-21swapper/320:45:173
916999130,11cyclictest0-21swapper/323:55:263
916899138,3cyclictest0-21swapper/223:55:142
9168991310,2cyclictest6898-21kworker/u8:219:39:052
9168991310,2cyclictest6898-21kworker/u8:219:28:062
9168991310,2cyclictest0-21swapper/223:45:122
9168991310,2cyclictest0-21swapper/223:21:042
9168991310,2cyclictest0-21swapper/200:07:222
916899130,1cyclictest0-21swapper/220:55:202
916899130,12cyclictest0-21swapper/222:26:202
916899130,12cyclictest0-21swapper/221:54:592
916799131,3cyclictest25260-21diskmemload21:10:191
9167991310,2cyclictest25260-21diskmemload21:24:041
9167991310,2cyclictest0-21swapper/123:37:031
9167991310,2cyclictest0-21swapper/123:25:241
9167991310,2cyclictest0-21swapper/123:00:541
9167991310,2cyclictest0-21swapper/123:00:541
9167991310,2cyclictest0-21swapper/121:25:031
9167991310,2cyclictest0-21swapper/120:56:021
916799130,2cyclictest25260-21diskmemload22:50:331
916799130,2cyclictest25260-21diskmemload22:41:001
916799130,2cyclictest0-21swapper/123:55:161
916799130,2cyclictest0-21swapper/123:53:031
916799130,2cyclictest0-21swapper/122:39:201
916799130,2cyclictest0-21swapper/122:30:381
916799130,2cyclictest0-21swapper/121:35:131
916799130,2cyclictest0-21swapper/120:35:391
916799130,12cyclictest25260-21diskmemload00:20:001
916799130,12cyclictest0-21swapper/123:45:131
916799130,12cyclictest0-21swapper/123:16:011
916799130,12cyclictest0-21swapper/122:21:481
916799130,12cyclictest0-21swapper/120:11:031
916799130,12cyclictest0-21swapper/100:37:221
9166991310,2cyclictest25260-21diskmemload23:18:510
9166991310,2cyclictest25260-21diskmemload22:38:040
9166991310,2cyclictest25260-21diskmemload21:15:310
9166991310,2cyclictest22079-21kworker/u8:100:30:040
9166991310,2cyclictest0-21swapper/023:55:040
9166991310,2cyclictest0-21swapper/023:31:240
9166991310,2cyclictest0-21swapper/023:26:310
9166991310,2cyclictest0-21swapper/022:41:210
9166991310,2cyclictest0-21swapper/022:13:390
9166991310,2cyclictest0-21swapper/000:18:500
9166991310,2cyclictest0-21swapper/000:10:390
916699130,2cyclictest0-21swapper/023:10:050
916699130,2cyclictest0-21swapper/023:03:420
916699130,2cyclictest0-21swapper/023:03:410
916699130,2cyclictest0-21swapper/022:21:020
916699130,2cyclictest0-21swapper/000:05:550
916699130,12cyclictest25260-21diskmemload23:05:100
916699130,12cyclictest0-21swapper/021:55:540
916699130,12cyclictest0-21swapper/021:46:000
916699130,12cyclictest0-21swapper/021:26:150
916699130,11cyclictest25260-21diskmemload00:21:210
89972130,2sleep20-21swapper/221:25:292
27192130,2sleep00-21swapper/021:20:010
128232130,2sleep30-21swapper/323:45:033
125902130,2sleep00-21swapper/023:45:000
916999129,2cyclictest4371-21kworker/u8:220:19:053
916999129,2cyclictest0-21swapper/323:25:383
916999129,2cyclictest0-21swapper/323:15:433
916999129,2cyclictest0-21swapper/323:00:133
916999129,2cyclictest0-21swapper/323:00:123
916999128,2cyclictest27526-21diskstats21:45:143
916999122,7cyclictest0-21swapper/320:36:583
916999120,2cyclictest9515-21ssh00:16:183
916999120,2cyclictest5625-21ssh21:55:283
916999120,2cyclictest0-21swapper/320:40:173
916999120,2cyclictest0-21swapper/319:11:043
916999120,2cyclictest0-21swapper/300:36:093
916999120,2cyclictest0-21swapper/300:01:453
916999120,11cyclictest22564-21ssh00:30:243
916999120,11cyclictest0-21swapper/323:41:463
916999120,11cyclictest0-21swapper/320:25:163
916999120,11cyclictest0-21swapper/319:55:163
916999120,10cyclictest0-21swapper/300:20:353
916899129,2cyclictest17459-21kworker/u8:020:18:042
916899129,2cyclictest17459-21kworker/u8:020:05:052
916899129,2cyclictest0-21swapper/222:50:402
916899128,3cyclictest0-21swapper/219:10:132
916899128,2cyclictest0-21swapper/221:20:162
916899120,11cyclictest0-21swapper/219:15:132
916799129,2cyclictest0-21swapper/122:11:031
916799129,2cyclictest0-21swapper/121:55:001
916799129,2cyclictest0-21swapper/120:15:181
916799129,2cyclictest0-21swapper/119:10:131
916799128,2cyclictest0-21swapper/120:25:141
916799121,3cyclictest0-21swapper/119:46:001
916799120,2cyclictest0-21swapper/123:20:141
916799120,2cyclictest0-21swapper/121:05:161
916799120,2cyclictest0-21swapper/120:45:171
916799120,2cyclictest0-21swapper/120:20:181
916799120,2cyclictest0-21swapper/119:20:411
916799120,2cyclictest0-21swapper/100:26:011
916799120,11cyclictest0-21swapper/119:55:311
916699129,2cyclictest940-21apt-get22:25:130
916699129,2cyclictest7666-21kworker/u8:222:00:020
916699129,2cyclictest0-21swapper/023:46:110
916699129,2cyclictest0-21swapper/022:31:520
916699129,2cyclictest0-21swapper/019:46:000
916699129,2cyclictest0-21swapper/000:25:130
916699120,2cyclictest0-21swapper/021:35:010
916699120,2cyclictest0-21swapper/021:05:120
916699120,2cyclictest0-21swapper/000:37:110
916699120,11cyclictest19499-21kworker/u8:120:56:040
916699120,11cyclictest0-21swapper/023:51:320
916699120,11cyclictest0-21swapper/022:50:300
916699120,11cyclictest0-21swapper/021:52:320
916699120,11cyclictest0-21swapper/021:40:130
916699120,11cyclictest0-21swapper/021:14:200
916699120,11cyclictest0-21swapper/020:51:000
916699120,11cyclictest0-21swapper/020:16:010
916699120,11cyclictest0-21swapper/019:20:000
916999118,2cyclictest0-21swapper/319:45:153
916999112,7cyclictest0-21swapper/319:15:013
916999112,6cyclictest0-21swapper/320:52:583
916899118,2cyclictest0-21swapper/219:20:142
916899118,2cyclictest0-21swapper/200:16:512
916899110,2cyclictest0-21swapper/221:00:202
916799111,2cyclictest9898-21perl20:30:141
916799110,9cyclictest11385-21munin-node1
916799110,9cyclictest0-21swapper/120:00:121
916799110,9cyclictest0-21swapper/120:00:111
916799110,9cyclictest0-21swapper/119:40:111
916799110,9cyclictest0-21swapper/119:30:131
916799110,6cyclictest0-21swapper/120:55:001
916799110,10cyclictest0-21swapper/119:25:041
916699110,3cyclictest274-21jbd2/sda1-820:05:170
916699110,2cyclictest0-21swapper/019:12:210
916699110,10cyclictest0-21swapper/020:26:220
916999107,2cyclictest17459-21kworker/u8:020:12:043
916999107,2cyclictest17459-21kworker/u8:020:08:053
916999105,3cyclictest23941-21grep21:05:123
916999105,3cyclictest20316-21needreboot19:35:183
916999105,3cyclictest19918-21fschecks_time20:55:153
916899104,4cyclictest274-21jbd2/sda1-820:50:262
916799100,8cyclictest0-21swapper/119:35:131
916699107,2cyclictest0-21swapper/020:45:130
916699107,2cyclictest0-21swapper/020:10:150
91699994,3cyclictest21600-21aten2.4_r3power19:40:123
91699991,3cyclictest0-21swapper/319:50:123
91689994,3cyclictest16915-21sshd20:46:212
91669996,2cyclictest6898-21kworker/u8:219:51:050
91669996,2cyclictest0-21swapper/021:00:210
91669996,2cyclictest0-21swapper/020:40:110
91669994,3cyclictest13395-21cat19:20:010
11081290,1sleep00-21swapper/020:34:010
91689983,3cyclictest23931-21cut21:05:112
91669985,2cyclictest0-21swapper/019:41:050
91669985,2cyclictest0-21swapper/019:30:310
91669984,3cyclictest11382-21apt-get20:35:100
91669981,3cyclictest6246-21ntp_states20:20:180
91669980,2cyclictest0-21swapper/020:01:210
91669980,2cyclictest0-21swapper/020:01:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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