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2026-05-21 - 20:15

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 Thu May 21, 2026 12:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16072212093,20sleep00-21swapper/007:05:400
160822118101,12sleep20-21swapper/207:05:422
16691211795,16sleep10-21swapper/107:08:221
16582211496,12sleep30-21swapper/307:06:593
52642780,0sleep00-21swapper/010:20:490
301012760,1sleep2301ktimersoftd/210:13:342
285722740,5sleep01684799cyclictest09:38:130
273532720,0sleep20-21swapper/208:55:112
4202680,0sleep10-21swapper/109:42:261
8632670,0sleep00-21swapper/011:57:490
16850992016,2cyclictest15050-21kworker/u8:111:52:053
16847991916,2cyclictest6948-21kworker/u8:012:08:050
16850991815,2cyclictest19395-21kworker/u8:010:02:043
16849991815,2cyclictest1001-21kworker/u8:009:15:042
16850991714,2cyclictest20759-21kworker/u8:110:43:043
16850991714,2cyclictest15733-21kworker/u8:009:29:043
16850991713,2cyclictest7948-21kworker/u8:110:58:053
16849991714,2cyclictest3275-21kworker/u8:212:37:042
16850991613,2cyclictest23645-21kworker/u8:211:41:043
16850991612,3cyclictest17285-21kworker/u8:112:31:043
16850991612,2cyclictest30115-21kworker/u8:212:20:013
16847991613,2cyclictest13545-21kworker/u8:010:34:010
16847991612,2cyclictest1001-21kworker/u8:009:13:050
16850991512,2cyclictest27872-21kworker/u8:210:11:053
16850991512,2cyclictest25062-21kworker/u8:012:25:053
16850991512,2cyclictest23645-21kworker/u8:211:48:043
16850991512,2cyclictest17339-21kworker/u8:011:14:053
16850991512,2cyclictest0-21swapper/308:25:113
1685099151,12cyclictest11068-21ssh11:00:263
1685099150,13cyclictest8514-21rm11:31:243
1685099150,13cyclictest22669-21unixbench_multi08:41:033
1684999150,14cyclictest0-21swapper/208:25:172
1684999150,13cyclictest0-21swapper/211:26:042
1684899150,13cyclictest11232-21aten2.4_r3power11:35:131
16847991512,2cyclictest23645-21kworker/u8:211:47:040
16847991512,2cyclictest15733-21kworker/u8:009:32:040
1684799150,13cyclictest0-21swapper/010:00:160
306122140,2sleep229-21rcuc/207:41:032
242892140,3sleep20-21swapper/211:15:122
204042140,2sleep00-21swapper/008:36:030
16850991411,2cyclictest8800-21kworker/u8:011:37:053
16850991411,2cyclictest30115-21kworker/u8:211:55:043
16850991411,2cyclictest27872-21kworker/u8:210:30:013
16850991411,2cyclictest23645-21kworker/u8:211:22:043
16850991411,2cyclictest19395-21kworker/u8:010:09:043
16850991411,2cyclictest17285-21kworker/u8:112:17:053
16850991411,2cyclictest1483-21kworker/u8:111:29:053
16850991411,2cyclictest1201-21kworker/u8:010:24:053
16850991411,2cyclictest1001-21kworker/u8:009:19:043
16850991411,2cyclictest0-21swapper/309:33:313
16850991411,2cyclictest0-21swapper/307:58:293
16850991410,2cyclictest0-21swapper/307:10:113
1685099140,3cyclictest19167-21date08:35:003
1685099140,2cyclictest0-21swapper/310:15:193
1685099140,13cyclictest0-21swapper/310:39:323
1685099140,12cyclictest0-21swapper/312:02:323
1685099140,12cyclictest0-21swapper/309:55:173
1685099140,12cyclictest0-21swapper/309:46:033
1684999149,3cyclictest10402-21sh09:52:452
16849991411,2cyclictest4776-40update-apt-xapi07:58:282
16849991411,2cyclictest27872-21kworker/u8:210:40:012
16849991411,2cyclictest0-21swapper/212:18:592
16849991411,2cyclictest0-21swapper/211:08:082
1684999140,2cyclictest0-21swapper/210:25:002
1684999140,2cyclictest0-21swapper/209:44:072
1684999140,13cyclictest0-21swapper/211:33:082
1684999140,13cyclictest0-21swapper/210:59:482
1684999140,12cyclictest30890-21taskset10:47:472
1684999140,12cyclictest21098-21apt-get07:20:112
1684999140,12cyclictest0-21swapper/212:20:122
1684999140,12cyclictest0-21swapper/209:28:572
1684899149,4cyclictest26468-21kworker/u8:209:37:051
16848991411,2cyclictest30115-21kworker/u8:212:02:041
1684899140,3cyclictest19192-21sort08:35:011
1684899140,13cyclictest0-21swapper/109:11:041
1684899140,12cyclictest0-21swapper/111:56:021
1684899140,12cyclictest0-21swapper/110:09:331
1684899140,12cyclictest0-21swapper/107:46:041
16847991411,2cyclictest23645-21kworker/u8:211:23:040
16847991411,2cyclictest17285-21kworker/u8:112:16:050
16847991411,2cyclictest0-21swapper/012:22:200
16847991411,2cyclictest0-21swapper/009:19:550
16847991410,3cyclictest23645-21kworker/u8:211:44:020
1684799140,2cyclictest0-21swapper/011:17:500
16850991310,2cyclictest6804-21kworker/u8:008:18:043
16850991310,2cyclictest31258-21kworker/u8:107:52:043
16850991310,2cyclictest22692-21kworker/u8:209:22:063
16850991310,2cyclictest22692-21kworker/u8:208:22:053
16850991310,2cyclictest16630-21kworker/u8:107:26:043
16850991310,2cyclictest0-21swapper/311:08:213
16850991310,2cyclictest0-21swapper/309:10:153
1685099130,2cyclictest0-21swapper/312:12:583
1685099130,2cyclictest0-21swapper/312:05:163
1685099130,2cyclictest0-21swapper/311:15:413
1685099130,2cyclictest0-21swapper/310:45:073
1685099130,2cyclictest0-21swapper/309:50:403
1685099130,2cyclictest0-21swapper/309:35:163
1685099130,12cyclictest0-21swapper/310:50:153
1685099130,12cyclictest0-21swapper/310:25:133
1685099130,12cyclictest0-21swapper/307:40:163
1685099130,12cyclictest0-21swapper/307:30:403
1685099130,11cyclictest0-21swapper/312:38:463
1685099130,11cyclictest0-21swapper/309:40:123
16849991310,2cyclictest6948-21kworker/u8:012:11:042
16849991310,2cyclictest1544-21memory07:50:152
16849991310,2cyclictest1201-21kworker/u8:010:19:042
16849991310,2cyclictest0-21swapper/211:58:382
16849991310,2cyclictest0-21swapper/207:25:162
1684999130,2cyclictest0-21swapper/212:06:022
1684999130,2cyclictest0-21swapper/211:51:442
1684999130,2cyclictest0-21swapper/210:31:022
1684999130,2cyclictest0-21swapper/210:25:182
1684999130,2cyclictest0-21swapper/209:49:282
1684999130,2cyclictest0-21swapper/209:24:182
1684999130,2cyclictest0-21swapper/209:05:172
1684999130,2cyclictest0-21swapper/208:40:152
1684999130,2cyclictest0-21swapper/207:30:122
1684999130,12cyclictest0-21swapper/211:45:482
1684999130,12cyclictest0-21swapper/210:50:172
1684999130,12cyclictest0-21swapper/208:30:122
1684999130,12cyclictest0-21swapper/207:45:142
1684999130,11cyclictest0-21swapper/209:37:422
16848991310,2cyclictest22692-21kworker/u8:209:23:051
16848991310,2cyclictest0-21swapper/112:36:131
16848991310,2cyclictest0-21swapper/112:29:211
16848991310,2cyclictest0-21swapper/111:52:221
16848991310,2cyclictest0-21swapper/111:20:031
16848991310,2cyclictest0-21swapper/111:11:031
16848991310,2cyclictest0-21swapper/111:09:021
16848991310,2cyclictest0-21swapper/110:50:221
16848991310,2cyclictest0-21swapper/110:26:041
16848991310,2cyclictest0-21swapper/109:18:331
1684899130,2cyclictest23336-21aten2.4-expect08:45:131
1684899130,2cyclictest0-21swapper/112:21:511
1684899130,2cyclictest0-21swapper/112:10:521
1684899130,2cyclictest0-21swapper/111:01:031
1684899130,2cyclictest0-21swapper/110:35:041
1684899130,2cyclictest0-21swapper/110:31:021
1684899130,2cyclictest0-21swapper/107:58:331
1684899130,12cyclictest687-21diskmemload09:50:031
1684899130,12cyclictest0-21swapper/110:21:031
1684899130,12cyclictest0-21swapper/110:13:431
1684899130,12cyclictest0-21swapper/109:55:321
1684899130,11cyclictest687-21diskmemload11:15:421
1684899130,11cyclictest0-21swapper/111:30:281
1684899130,11cyclictest0-21swapper/109:25:281
16847991310,2cyclictest687-21diskmemload09:40:380
16847991310,2cyclictest29022-21ssh10:45:290
16847991310,2cyclictest0-21swapper/012:30:280
16847991310,2cyclictest0-21swapper/012:25:570
16847991310,2cyclictest0-21swapper/012:01:270
16847991310,2cyclictest0-21swapper/011:31:060
16847991310,2cyclictest0-21swapper/011:05:130
16847991310,2cyclictest0-21swapper/011:01:350
16847991310,2cyclictest0-21swapper/010:26:360
16847991310,2cyclictest0-21swapper/009:55:550
16847991310,2cyclictest0-21swapper/009:52:400
16847991310,2cyclictest0-21swapper/009:20:110
16847991310,2cyclictest0-21swapper/008:05:170
16847991310,2cyclictest0-21swapper/007:56:010
16847991310,2cyclictest0-21swapper/007:20:110
1684799130,2cyclictest13324-21ps12:10:190
1684799130,2cyclictest0-21swapper/010:50:200
1684799130,2cyclictest0-21swapper/010:40:020
1684799130,2cyclictest0-21swapper/010:18:580
1684799130,12cyclictest0-21swapper/011:50:130
1684799130,12cyclictest0-21swapper/011:27:100
1684799130,12cyclictest0-21swapper/011:10:480
1684799130,12cyclictest0-21swapper/010:55:350
1684799130,12cyclictest0-21swapper/010:11:250
1684799130,12cyclictest0-21swapper/010:06:170
1684799130,12cyclictest0-21swapper/009:47:450
1684799130,12cyclictest0-21swapper/009:25:580
178512120,0sleep20-21swapper/211:41:042
1685099129,2cyclictest6804-21kworker/u8:008:50:043
1685099129,2cyclictest0-21swapper/308:35:163
1684999129,2cyclictest22692-21kworker/u8:209:01:042
1684999129,2cyclictest0-21swapper/212:33:292
1684999129,2cyclictest0-21swapper/212:00:292
1684999129,2cyclictest0-21swapper/211:24:592
1684999129,2cyclictest0-21swapper/211:14:082
1684999129,2cyclictest0-21swapper/211:01:012
1684999129,2cyclictest0-21swapper/210:35:582
1684999129,2cyclictest0-21swapper/210:05:252
1684999129,2cyclictest0-21swapper/208:21:012
1684999120,2cyclictest0-21swapper/211:36:122
1684999120,2cyclictest0-21swapper/209:13:482
1684999120,2cyclictest0-21swapper/208:45:132
1684999120,11cyclictest0-21swapper/210:03:252
1684999120,10cyclictest0-21swapper/212:27:532
1684899129,2cyclictest0-21swapper/112:17:531
1684899121,3cyclictest20961-21latency_hist07:20:001
1684899120,2cyclictest0-21swapper/110:57:231
1684899120,2cyclictest0-21swapper/110:46:021
1684899120,2cyclictest0-21swapper/110:40:011
1684899120,2cyclictest0-21swapper/109:45:031
1684899120,11cyclictest0-21swapper/111:40:031
1684899120,11cyclictest0-21swapper/111:27:441
1684899120,11cyclictest0-21swapper/110:17:531
1684899120,11cyclictest0-21swapper/107:50:281
1684899120,10cyclictest687-21diskmemload11:45:411
1684899120,10cyclictest0-21swapper/109:33:331
1684799129,2cyclictest0-21swapper/012:39:390
1684799129,2cyclictest0-21swapper/011:35:290
1684799129,2cyclictest0-21swapper/008:40:100
1684799129,2cyclictest0-21swapper/008:31:020
1684799129,2cyclictest0-21swapper/007:30:160
1684799129,2cyclictest0-21swapper/007:15:170
1684799120,2cyclictest0-21swapper/007:37:090
1684799120,11cyclictest0-21swapper/010:35:250
1685099118,2cyclictest6804-21kworker/u8:008:57:053
1685099118,2cyclictest31258-21kworker/u8:107:46:043
1685099118,2cyclictest26342-21kworker/u8:007:21:043
1685099118,2cyclictest22692-21kworker/u8:209:05:053
1685099118,2cyclictest22692-21kworker/u8:208:03:043
1685099118,2cyclictest0-21swapper/308:45:213
1685099118,2cyclictest0-21swapper/308:10:113
1685099116,3cyclictest29762-21cut09:00:133
1684999118,2cyclictest0-21swapper/209:33:092
1684999110,2cyclictest0-21swapper/209:55:452
1684999110,10cyclictest26342-21kworker/u8:007:17:052
1684899118,2cyclictest687-21diskmemload10:03:441
1684899118,2cyclictest0-21swapper/112:07:141
1684899118,2cyclictest0-21swapper/107:20:131
1684899110,9cyclictest9171-21munin-node1
1684899110,9cyclictest17059-21munin-node1
1684899110,9cyclictest0-21swapper/108:40:101
1684899110,9cyclictest0-21swapper/108:35:151
1684899110,9cyclictest0-21swapper/107:35:151
1684899110,3cyclictest0-21swapper/108:55:111
1684899110,10cyclictest0-21swapper/108:50:141
1684799118,2cyclictest6804-21kworker/u8:008:55:040
1684799118,2cyclictest16630-21kworker/u8:107:14:050
1684799118,2cyclictest0-21swapper/007:40:080
1684799110,10cyclictest0-21swapper/009:01:050
1684799110,10cyclictest0-21swapper/008:19:580
1684999105,3cyclictest28825-21sshd07:38:082
1684899107,2cyclictest0-21swapper/109:00:121
1684899107,2cyclictest0-21swapper/108:18:021
1684899107,2cyclictest0-21swapper/108:00:121
1684899101,8cyclictest31322-21apt-get12:30:121
1684899100,8cyclictest0-21swapper/108:05:111
1684899100,8cyclictest0-21swapper/107:25:111
1684899100,2cyclictest0-21swapper/108:20:121
1684899100,2cyclictest0-21swapper/107:40:111
1684799107,2cyclictest6804-21kworker/u8:008:49:050
1684799107,2cyclictest16630-21kworker/u8:107:28:040
1684799107,2cyclictest0-21swapper/008:25:120
1684799101,3cyclictest0-21swapper/009:09:590
1684799100,8cyclictest274-21jbd2/sda1-808:10:160
168509994,3cyclictest0-21swapper/307:15:153
168509993,4cyclictest27697-21grep07:35:113
168509991,3cyclictest7292-21aten2.4-expect08:05:133
168499996,2cyclictest0-21swapper/208:01:072
168499994,3cyclictest26254-21proc_pri08:50:182
168499994,3cyclictest20801-21sshd08:37:092
168499994,3cyclictest170582sleep207:10:102
168489996,2cyclictest26009-21ntpq07:30:171
168489996,2cyclictest0-21swapper/109:05:111
168489990,8cyclictest0-21swapper/108:25:001
168479994,3cyclictest5752-21hwlatdetect08:00:140
168479994,3cyclictest536-21cron07:49:590
168479994,3cyclictest26682-21unixbench_multi08:51:020
168479990,8cyclictest0-21swapper/008:23:090
168499983,3cyclictest7648-21fschecks_time08:05:142
168499983,3cyclictest11180-21munin-node2
168499983,3cyclictest10957-21cron08:14:592
168479984,3cyclictest31350-21aten2.4-expect07:45:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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