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2026-08-07 - 02:51

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 Fri Aug 07, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18141211491,18sleep30-21swapper/319:09:283
18141211491,18sleep30-21swapper/319:09:273
17405211498,11sleep20-21swapper/219:05:222
17405211498,11sleep20-21swapper/219:05:222
17936211087,17sleep00-21swapper/019:06:480
17936211087,17sleep00-21swapper/019:06:470
17457211088,16sleep10-21swapper/119:05:491
17457211088,16sleep10-21swapper/119:05:481
143002800,1sleep30-21swapper/323:32:203
158792750,0sleep10-21swapper/123:34:421
135032740,1sleep3381ktimersoftd/300:36:533
306092710,1sleep2301ktimersoftd/221:38:352
80712690,6sleep01821399cyclictest21:48:190
168552680,0sleep00-21swapper/023:35:140
130782680,0sleep30-21swapper/300:04:263
230502670,0sleep20-21swapper/223:09:052
101872660,0sleep30-21swapper/321:17:243
75962650,0sleep10-21swapper/122:53:131
66242650,0sleep00-21swapper/021:14:290
18216992320,2cyclictest10428-21kworker/u8:121:29:043
1821499223,2cyclictest0-21swapper/123:58:011
18216992118,2cyclictest6596-21kworker/u8:022:52:043
18216992118,2cyclictest18220-21kworker/u8:021:42:053
18216992118,2cyclictest10428-21kworker/u8:122:05:053
18214992118,2cyclictest7189-21kworker/u8:221:50:041
18214992118,2cyclictest26609-21kworker/u8:119:35:041
1821499211,18cyclictest0-21swapper/123:53:041
1821499210,4cyclictest0-21swapper/123:38:051
18216992017,2cyclictest7189-21kworker/u8:222:00:043
18216992017,2cyclictest26645-21kworker/u8:222:49:053
18216992017,2cyclictest16577-21kworker/u8:223:38:053
18216992017,2cyclictest14987-21kworker/u8:122:43:053
18216992017,2cyclictest1489-21kworker/u8:223:25:043
18216992017,2cyclictest1489-21kworker/u8:223:22:063
18216992017,2cyclictest13764-21kworker/u8:200:09:043
18216992017,2cyclictest13611-21kworker/u8:123:50:013
18215992017,2cyclictest26933-21kworker/u8:200:19:042
1821499202,2cyclictest0-21swapper/123:46:071
18214992017,2cyclictest13488-21kworker/u8:000:39:051
1821499201,2cyclictest0-21swapper/123:20:061
1821499201,2cyclictest0-21swapper/123:08:041
1821499201,2cyclictest0-21swapper/122:12:061
1821499201,2cyclictest0-21swapper/119:44:021
1821499200,3cyclictest207150irq/24-eth122:00:041
1821499200,3cyclictest0-21swapper/100:09:041
18216991916,2cyclictest7119-21kworker/u8:022:36:043
18216991916,2cyclictest32681-21kworker/u8:219:49:043
18216991916,2cyclictest2685-21kworker/u8:223:57:053
1821499192,2cyclictest0-21swapper/121:32:021
1821499192,2cyclictest0-21swapper/100:02:061
18214991916,2cyclictest10428-21kworker/u8:120:32:051
1821499191,2cyclictest0-21swapper/123:17:041
1821499191,2cyclictest0-21swapper/122:38:051
1821499191,17cyclictest0-21swapper/121:44:051
1821499191,16cyclictest0-21swapper/121:49:051
1821499190,2cyclictest0-21swapper/123:13:051
1821499190,18cyclictest0-21swapper/120:03:041
231472180,1sleep0101ktimersoftd/019:20:170
18216991815,2cyclictest3886-21kworker/u8:119:58:013
18216991815,2cyclictest28340-21kworker/u8:023:46:073
18216991815,2cyclictest26789-21kworker/u8:022:12:053
18216991815,2cyclictest26645-21kworker/u8:223:13:053
18216991815,2cyclictest26572-21kworker/u8:020:55:053
18216991815,2cyclictest13611-21kworker/u8:123:08:053
18214991815,2cyclictest10428-21kworker/u8:121:00:011
1821499181,2cyclictest0-21swapper/122:30:051
1821499180,2cyclictest0-21swapper/122:06:041
1821499180,2cyclictest0-21swapper/120:51:041
1821499180,2cyclictest0-21swapper/120:29:041
18216991714,2cyclictest6596-21kworker/u8:022:59:053
18216991714,2cyclictest28053-21kworker/u8:023:17:043
18216991714,2cyclictest26609-21kworker/u8:119:44:023
18216991714,2cyclictest26572-21kworker/u8:020:51:053
18216991714,2cyclictest20011-21kworker/u8:219:30:043
18216991714,2cyclictest18220-21kworker/u8:021:32:023
18216991714,2cyclictest18086-21kworker/u8:220:29:053
1821599171,14cyclictest31074-21perl19:40:152
1821499171,2cyclictest0-21swapper/120:23:051
1821499170,2cyclictest0-21swapper/120:09:051
1821499170,2cyclictest0-21swapper/119:31:051
1821499170,2cyclictest0-21swapper/119:22:041
18216991613,2cyclictest7189-21kworker/u8:221:53:043
18216991613,2cyclictest7189-21kworker/u8:221:49:043
18216991613,2cyclictest7119-21kworker/u8:022:30:053
18216991613,2cyclictest6416-21kworker/u8:220:09:053
18216991613,2cyclictest30195-21kworker/u8:020:03:053
18216991613,2cyclictest26645-21kworker/u8:223:03:043
18216991613,2cyclictest26572-21kworker/u8:021:02:043
18216991613,2cyclictest20011-21kworker/u8:219:38:043
18216991613,2cyclictest10428-21kworker/u8:121:23:053
18215991612,2cyclictest8012-21iostat_ios21:15:152
18215991612,2cyclictest0-21swapper/222:20:152
1821599161,13cyclictest23094-21iostat20:40:142
1821599161,13cyclictest0-21swapper/221:20:192
18214991613,2cyclictest12434-21kworker/u8:119:18:051
18214991613,2cyclictest11801-21kworker/u8:221:21:051
1821499161,2cyclictest23-21ksoftirqd/122:41:041
1821499160,3cyclictest0-21swapper/121:29:041
253082150,2sleep00-21swapper/021:33:050
18216991512,2cyclictest22219-21kworker/u8:019:22:043
18216991512,2cyclictest21924-21kworker/u8:100:28:053
18216991512,2cyclictest10428-21kworker/u8:120:40:053
18216991512,2cyclictest10428-21kworker/u8:120:23:043
1821699150,13cyclictest16682-21ssh21:56:243
18215991512,2cyclictest26645-21kworker/u8:222:46:062
18215991512,2cyclictest10428-21kworker/u8:120:25:042
18215991512,2cyclictest0-21swapper/222:16:042
1821599150,3cyclictest0-21swapper/221:52:392
1821599150,14cyclictest0-21swapper/222:53:342
1821599150,13cyclictest0-21swapper/223:01:442
18214991512,2cyclictest3886-21kworker/u8:119:58:061
1821499150,2cyclictest0-21swapper/122:15:041
1821499150,2cyclictest0-21swapper/120:41:051
1821399150,2cyclictest20431-21ssh23:05:460
325562140,2sleep00-21swapper/023:50:380
31212140,2sleep20-21swapper/221:10:182
216802140,1sleep3381ktimersoftd/300:12:283
18216991411,2cyclictest7991-21kworker/u8:000:15:043
18216991411,2cyclictest20011-21kworker/u8:219:15:053
18216991411,2cyclictest10428-21kworker/u8:121:07:053
18216991411,2cyclictest10428-21kworker/u8:120:34:023
1821699140,12cyclictest30312-21ssh21:38:083
1821699140,12cyclictest0-21swapper/322:15:263
18215991411,2cyclictest26933-21kworker/u8:200:20:052
18215991411,2cyclictest15411-21kworker/u8:021:58:052
18215991411,2cyclictest13611-21kworker/u8:123:48:052
18215991411,2cyclictest10428-21kworker/u8:121:28:052
18215991410,3cyclictest26645-21kworker/u8:223:12:052
1821599140,3cyclictest20303-21ssh22:33:122
1821599140,3cyclictest0-21swapper/223:50:172
1821599140,3cyclictest0-21swapper/221:33:532
1821599140,13cyclictest0-21swapper/200:13:452
1821599140,13cyclictest0-21swapper/200:06:042
1821599140,12cyclictest5143-21ssh23:55:392
1821599140,12cyclictest0-21swapper/222:25:182
1821499142,2cyclictest0-21swapper/122:49:051
1821499141,2cyclictest0-21swapper/120:17:051
18214991411,2cyclictest0-21swapper/122:24:071
1821499140,3cyclictest0-21swapper/100:31:041
1821499140,12cyclictest0-21swapper/121:55:151
1821499140,12cyclictest0-21swapper/100:27:211
18213991411,2cyclictest7189-21kworker/u8:222:27:050
18213991411,2cyclictest0-21swapper/020:20:160
18213991410,2cyclictest7167-21hwlatdetect23:25:160
1821399140,2cyclictest1855-21diskmemload23:21:160
1821399140,13cyclictest0-21swapper/022:41:360
1821399140,12cyclictest31822-21cat19:41:030
1821399140,12cyclictest27152-21irqstats20:50:140
1821399140,12cyclictest0-21swapper/019:15:120
113762140,3sleep20-21swapper/220:11:002
196002130,2sleep20-21swapper/219:11:022
18216991310,2cyclictest6416-21kworker/u8:220:17:053
18216991310,2cyclictest32508-21kworker/u8:221:10:043
18216991310,2cyclictest10428-21kworker/u8:120:12:043
18216991310,2cyclictest0-21swapper/323:44:093
1821699130,2cyclictest0-21swapper/322:24:063
1821699130,2cyclictest0-21swapper/300:34:563
1821699130,2cyclictest0-21swapper/300:23:193
1821699130,12cyclictest0-21swapper/322:27:053
1821699130,12cyclictest0-21swapper/319:50:133
18215991310,2cyclictest0-21swapper/223:21:102
18215991310,2cyclictest0-21swapper/222:35:302
18215991310,2cyclictest0-21swapper/222:00:132
18215991310,2cyclictest0-21swapper/220:46:022
18215991310,2cyclictest0-21swapper/219:35:102
18215991310,2cyclictest0-21swapper/219:30:192
18215991310,2cyclictest0-21swapper/200:35:382
18215991310,2cyclictest0-21swapper/200:01:012
1821599130,2cyclictest1855-21diskmemload00:30:162
1821599130,2cyclictest0-21swapper/223:30:532
1821599130,2cyclictest0-21swapper/223:26:512
1821599130,2cyclictest0-21swapper/222:40:002
1821599130,12cyclictest9748-21ssh22:55:162
1821599130,12cyclictest1855-21diskmemload22:13:102
1821599130,12cyclictest0-21swapper/223:15:082
1821599130,11cyclictest0-21swapper/222:05:562
1821499131,4cyclictest0-21swapper/100:15:141
1821499131,10cyclictest0-21swapper/120:45:131
18214991310,2cyclictest0-21swapper/123:43:111
18214991310,2cyclictest0-21swapper/121:13:251
18214991310,2cyclictest0-21swapper/119:45:181
18214991310,2cyclictest0-21swapper/100:20:411
18214991310,2cyclictest0-21swapper/100:10:121
1821499130,2cyclictest0-21swapper/123:29:361
1821499130,2cyclictest0-21swapper/122:25:151
1821499130,2cyclictest0-21swapper/121:17:251
1821499130,12cyclictest0-21swapper/122:57:271
18213991310,2cyclictest0-21swapper/023:45:170
18213991310,2cyclictest0-21swapper/021:42:260
1821399130,2cyclictest1855-21diskmemload22:35:180
1821399130,2cyclictest0-21swapper/022:57:360
1821399130,2cyclictest0-21swapper/020:30:140
1821399130,2cyclictest0-21swapper/000:19:050
1821399130,12cyclictest26930-21apt-get21:35:110
1821399130,12cyclictest1855-21diskmemload22:17:160
1821399130,12cyclictest0-21swapper/022:49:170
1821399130,12cyclictest0-21swapper/021:59:370
1821399130,12cyclictest0-21swapper/019:36:020
250112120,2sleep00-21swapper/023:43:310
1821699129,2cyclictest0-21swapper/320:45:143
1821599120,2cyclictest0-21swapper/223:36:252
1821599120,2cyclictest0-21swapper/221:40:022
1821599120,2cyclictest0-21swapper/221:00:152
1821599120,11cyclictest0-21swapper/223:40:062
1821599120,11cyclictest0-21swapper/221:46:382
1821599120,11cyclictest0-21swapper/219:46:022
1821599120,11cyclictest0-21swapper/200:25:222
1821499127,3cyclictest4562-21gdm-simple-gree21:08:591
1821499121,3cyclictest18424-21munin-node1
1821499121,3cyclictest0-21swapper/120:10:591
1821499120,11cyclictest28425-21ssh21:35:551
1821399129,2cyclictest0-21swapper/023:30:110
1821399129,2cyclictest0-21swapper/021:52:060
1821399129,2cyclictest0-21swapper/000:21:040
1821399129,2cyclictest0-21swapper/000:09:260
1821399125,5cyclictest1855-21diskmemload00:33:130
1821399120,2cyclictest3816-21aten2.4-expect23:55:120
1821399120,11cyclictest0-21swapper/023:14:170
1821399120,11cyclictest0-21swapper/022:20:150
1821399120,11cyclictest0-21swapper/022:12:590
1821399120,11cyclictest0-21swapper/021:29:200
1821399120,10cyclictest0-21swapper/022:06:510
174952120,2sleep10-21swapper/123:03:131
150962120,2sleep00-21swapper/021:22:190
118472120,2sleep00-21swapper/000:02:360
4822110,1sleep00-21swapper/023:19:100
1821699118,2cyclictest0-21swapper/320:35:203
1821699118,2cyclictest0-21swapper/319:13:083
1821599118,2cyclictest30195-21kworker/u8:019:55:052
1821599118,2cyclictest0-21swapper/220:06:022
1821499110,9cyclictest0-21swapper/120:55:161
1821499110,9cyclictest0-21swapper/119:50:161
1821399118,2cyclictest0-21swapper/022:30:160
1821399118,2cyclictest0-21swapper/021:16:000
1821399118,2cyclictest0-21swapper/020:25:110
1821399118,2cyclictest0-21swapper/000:35:170
1821399110,9cyclictest0-21swapper/000:10:180
1821399110,2cyclictest0-21swapper/023:03:220
1821399110,2cyclictest0-21swapper/022:51:330
1821399110,2cyclictest0-21swapper/022:01:100
1821399110,1cyclictest0-21swapper/020:55:180
1821399110,1cyclictest0-21swapper/000:27:070
1821599107,2cyclictest10428-21kworker/u8:120:56:062
1821599107,2cyclictest0-21swapper/219:51:022
1821599106,2cyclictest21555-21mailstats20:36:032
1821599100,9cyclictest0-21swapper/220:53:562
1821599100,9cyclictest0-21swapper/219:23:582
1821499106,2cyclictest0-21swapper/120:35:141
1821499106,2cyclictest0-21swapper/119:25:121
1821399106,2cyclictest23163-21latency20:40:140
1821399100,9cyclictest30195-21kworker/u8:020:05:050
17402100,2sleep20-21swapper/221:08:422
182169990,8cyclictest0-21swapper/319:27:113
182159995,2cyclictest21313-21awk19:15:182
182159994,3cyclictest7330-21sshd20:00:412
182159994,3cyclictest20030-21sendmail-mta20:33:402
182139994,3cyclictest2378-21cpuspeed_turbos19:50:120
182139994,3cyclictest20722-21df20:35:150
182139990,8cyclictest26572-21kworker/u8:021:05:050
182139990,7cyclictest274-21jbd2/sda1-821:00:160
182159983,3cyclictest24593-21aten2.4_r3power19:25:132
182159981,3cyclictest0-21swapper/220:21:042
182159980,7cyclictest0-21swapper/220:15:022
182139985,2cyclictest0-21swapper/019:56:040
182139984,2cyclictest25078-21sed19:25:150
182139984,2cyclictest18454-21aten2.4_r3power19:10:110
182139984,2cyclictest12732-21fschecks_count20:15:130
182139980,7cyclictest0-21swapper/020:01:040
182139980,7cyclictest0-21swapper/019:49:060
182139980,7cyclictest0-21swapper/019:33:260
182139980,2cyclictest0-21swapper/020:13:200
182139974,2cyclictest101ktimersoftd/020:45:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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