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2026-04-03 - 04:08

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 all highest latencies:
System rack3slot6s.osadl.org (updated Fri Apr 03, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
195842116106,6sleep30-21swapper/319:09:393
196102114103,6sleep10-21swapper/119:09:571
19461211296,11sleep20-21swapper/219:08:022
19469210177,18sleep00-21swapper/019:08:080
204152770,0sleep20-21swapper/200:17:352
209452710,0sleep00-21swapper/022:35:240
47962700,0sleep10-21swapper/121:45:111
82732670,0sleep30-21swapper/321:48:333
63712290,1sleep20-21swapper/200:02:402
1964199245,12cyclictest0-21swapper/021:05:130
1964199221,19cyclictest0-21swapper/023:25:120
1964399210,19cyclictest0-21swapper/222:05:112
1964399201,2cyclictest0-21swapper/223:50:102
1964199200,2cyclictest3284-21diskmemload00:00:110
1964199200,2cyclictest0-21swapper/023:50:100
1964199200,18cyclictest0-21swapper/021:00:100
128282200,1sleep011-21rcuc/020:11:010
36162190,0sleep00-21swapper/000:34:490
19644991714,2cyclictest7522-21kworker/u8:022:07:043
19644991714,2cyclictest27932-21kworker/u8:221:13:043
19642991714,2cyclictest31801-21kworker/u8:221:44:051
1964199172,9cyclictest0-21swapper/019:20:590
19644991613,2cyclictest32062-21kworker/u8:122:18:043
1964499160,2cyclictest0-21swapper/321:44:053
1964399161,3cyclictest12300-21hddtemp_smartct20:10:152
19643991612,2cyclictest18098-21df_abs20:25:142
19642991613,2cyclictest14089-21kworker/u8:123:17:041
1964199161,3cyclictest19570-21ssh23:08:410
30702150,0sleep30-21swapper/300:33:593
19644991512,2cyclictest7522-21kworker/u8:021:55:043
19644991511,2cyclictest12737-21hddtemp_smartct23:35:153
1964499150,14cyclictest0-21swapper/323:17:043
1964499150,13cyclictest22516-21ssh22:37:153
19643991510,3cyclictest3649-21snmpd19:45:172
1964399150,13cyclictest7817-21sh23:30:122
19642991512,2cyclictest0-21swapper/100:00:141
1964199152,9cyclictest10149-21ssh00:06:110
19641991511,2cyclictest0-21swapper/020:00:160
19641991510,3cyclictest1995-21df_abs22:50:100
1964199150,13cyclictest0-21swapper/023:55:110
200642140,2sleep00-21swapper/023:43:070
19644991411,2cyclictest24209-21kworker/u8:222:43:043
19644991411,2cyclictest11325-21kworker/u8:121:18:043
1964499140,3cyclictest6286-21ssh00:36:173
1964399149,3cyclictest0-21swapper/223:45:072
1964399149,3cyclictest0-21swapper/221:19:562
1964399141,2cyclictest3284-21diskmemload22:45:212
19643991411,2cyclictest0-21swapper/222:25:542
19643991411,2cyclictest0-21swapper/221:36:042
19643991410,2cyclictest0-21swapper/223:55:132
1964399140,3cyclictest30312-21ssh00:28:152
1964399140,3cyclictest17156-21chrt22:31:172
1964399140,2cyclictest0-21swapper/222:03:542
1964399140,13cyclictest0-21swapper/223:37:142
1964399140,12cyclictest3284-21diskmemload22:40:142
1964399140,12cyclictest0-21swapper/223:40:332
1964399140,12cyclictest0-21swapper/222:24:142
1964399140,12cyclictest0-21swapper/200:30:042
19642991411,2cyclictest2218-21kworker/u8:200:38:011
19642991411,2cyclictest0-21swapper/120:20:141
1964299140,12cyclictest0-21swapper/121:00:111
1964199149,3cyclictest29357-21ssh22:10:170
1964199142,6cyclictest0-21swapper/000:20:000
1964199141,6cyclictest0-21swapper/021:45:000
1964199140,12cyclictest5749-21ssh21:45:170
1964199140,12cyclictest0-21swapper/023:37:560
1964199140,12cyclictest0-21swapper/023:34:580
191112140,2sleep10-21swapper/123:07:571
20222130,1sleep1221ktimersoftd/100:32:211
19644991310,2cyclictest0-21swapper/323:29:553
19644991310,2cyclictest0-21swapper/323:24:553
19644991310,2cyclictest0-21swapper/323:04:553
19644991310,2cyclictest0-21swapper/322:27:553
19644991310,2cyclictest0-21swapper/321:26:153
19644991310,2cyclictest0-21swapper/300:28:203
19644991310,2cyclictest0-21swapper/300:10:163
1964499130,2cyclictest25260-21ssh00:22:453
1964499130,2cyclictest0-21swapper/322:50:153
1964499130,2cyclictest0-21swapper/300:04:053
1964499130,12cyclictest0-21swapper/323:10:053
1964499130,12cyclictest0-21swapper/322:23:053
1964499130,12cyclictest0-21swapper/322:10:043
1964499130,12cyclictest0-21swapper/300:15:363
1964499130,11cyclictest0-21swapper/323:45:453
1964399138,3cyclictest0-21swapper/222:10:142
1964399132,6cyclictest0-21swapper/220:39:592
1964399132,5cyclictest0-21swapper/221:50:002
19643991310,2cyclictest3284-21diskmemload21:51:202
19643991310,2cyclictest3284-21diskmemload21:51:192
19643991310,2cyclictest0-21swapper/223:15:182
19643991310,2cyclictest0-21swapper/223:12:222
19643991310,2cyclictest0-21swapper/223:07:482
19643991310,2cyclictest0-21swapper/222:56:122
19643991310,2cyclictest0-21swapper/222:35:162
19643991310,2cyclictest0-21swapper/222:15:292
19643991310,2cyclictest0-21swapper/220:55:152
19643991310,2cyclictest0-21swapper/220:45:152
1964399130,2cyclictest13999-21ssh00:10:282
1964399130,2cyclictest0-21swapper/221:40:302
1964399130,2cyclictest0-21swapper/221:33:432
1964399130,2cyclictest0-21swapper/219:51:012
1964399130,12cyclictest0-21swapper/223:26:032
1964399130,12cyclictest0-21swapper/223:21:042
1964399130,12cyclictest0-21swapper/221:57:242
1964399130,12cyclictest0-21swapper/221:26:042
1964399130,12cyclictest0-21swapper/200:20:242
1964399130,12cyclictest0-21swapper/200:09:542
1964399130,11cyclictest3551-21ssh21:10:052
19642991310,2cyclictest0-21swapper/121:55:391
19642991310,2cyclictest0-21swapper/121:23:341
1964299130,2cyclictest0-21swapper/122:41:441
1964299130,2cyclictest0-21swapper/121:55:001
1964299130,2cyclictest0-21swapper/121:55:001
1964299130,2cyclictest0-21swapper/121:05:131
1964299130,2cyclictest0-21swapper/120:35:171
1964299130,2cyclictest0-21swapper/100:05:191
1964299130,12cyclictest0-21swapper/122:15:161
1964299130,12cyclictest0-21swapper/119:26:001
1964299130,11cyclictest0-21swapper/122:55:291
1964299130,11cyclictest0-21swapper/122:50:471
1964199139,2cyclictest28387-21fschecks_time19:30:130
1964199132,6cyclictest3284-21diskmemload00:20:000
1964199132,6cyclictest0-21swapper/020:20:000
19641991310,2cyclictest3284-21diskmemload21:23:450
19641991310,2cyclictest2927-21ssh22:16:280
19641991310,2cyclictest0-21swapper/023:45:580
19641991310,2cyclictest0-21swapper/023:00:280
19641991310,2cyclictest0-21swapper/022:03:080
19641991310,2cyclictest0-21swapper/000:39:090
1964199130,2cyclictest0-21swapper/022:30:560
1964199130,2cyclictest0-21swapper/022:20:380
1964199130,2cyclictest0-21swapper/000:12:060
1964199130,12cyclictest0-21swapper/023:11:110
1964199130,12cyclictest0-21swapper/022:47:200
1964199130,12cyclictest0-21swapper/022:08:480
1964199130,12cyclictest0-21swapper/000:26:180
1964199130,11cyclictest13019-21ssh22:27:110
1964199130,11cyclictest0-21swapper/021:55:590
121822130,2sleep00-21swapper/021:52:200
121822130,2sleep00-21swapper/021:52:200
119732130,2sleep20-21swapper/223:00:162
283102120,2sleep10-21swapper/123:51:181
1964499129,2cyclictest7424-21kworker/u8:223:32:013
1964499129,2cyclictest5667-21kworker/u8:020:04:013
1964499129,2cyclictest11790-21kworker/u8:220:27:043
1964499129,2cyclictest0-21swapper/323:57:153
1964499129,2cyclictest0-21swapper/323:09:553
1964499129,2cyclictest0-21swapper/322:31:553
1964499129,2cyclictest0-21swapper/322:00:443
1964499129,2cyclictest0-21swapper/321:21:343
1964499120,2cyclictest27579-21ssh23:50:453
1964499120,11cyclictest0-21swapper/322:55:053
1964499120,11cyclictest0-21swapper/322:46:253
1964499120,11cyclictest0-21swapper/321:52:143
1964499120,11cyclictest0-21swapper/321:52:143
1964499120,11cyclictest0-21swapper/321:36:353
1964499120,11cyclictest0-21swapper/321:32:243
1964499120,11cyclictest0-21swapper/319:40:153
1964399129,2cyclictest0-21swapper/222:50:342
1964399129,2cyclictest0-21swapper/220:30:172
1964399129,2cyclictest0-21swapper/220:06:042
1964399129,2cyclictest0-21swapper/200:36:452
1964399122,7cyclictest0-21swapper/219:44:592
1964399121,6cyclictest0-21swapper/221:05:002
1964399120,11cyclictest0-21swapper/221:21:542
1964399120,11cyclictest0-21swapper/221:05:512
1964399120,11cyclictest0-21swapper/220:36:002
1964299129,2cyclictest21778-21kworker/u8:000:20:001
1964299129,2cyclictest0-21swapper/123:10:291
1964299129,2cyclictest0-21swapper/123:00:251
1964299129,2cyclictest0-21swapper/122:00:291
1964299120,2cyclictest6055-21ssh21:11:361
1964299120,2cyclictest0-21swapper/120:00:481
1964299120,2cyclictest0-21swapper/119:55:491
1964299120,2cyclictest0-21swapper/119:20:271
1964299120,2cyclictest0-21swapper/119:15:181
1964299120,10cyclictest0-21swapper/123:30:281
1964299120,10cyclictest0-21swapper/122:45:101
1964199129,2cyclictest0-21swapper/022:41:400
1964199129,2cyclictest0-21swapper/021:26:180
1964199129,2cyclictest0-21swapper/020:50:280
1964199129,2cyclictest0-21swapper/019:15:160
1964199123,5cyclictest0-21swapper/019:56:000
1964199121,3cyclictest0-21swapper/020:34:590
19641991210,1cyclictest0-21swapper/020:05:170
1964199120,2cyclictest0-21swapper/021:31:170
1964199120,2cyclictest0-21swapper/021:10:390
1964199120,1cyclictest0-21swapper/023:15:060
1964199120,11cyclictest0-21swapper/023:20:350
1964199120,11cyclictest0-21swapper/022:57:370
1964199120,11cyclictest0-21swapper/021:35:210
1964199120,11cyclictest0-21swapper/021:15:280
1964199120,11cyclictest0-21swapper/019:11:000
172702120,2sleep10-21swapper/122:31:291
98452110,2sleep10-21swapper/121:15:411
55912110,2sleep10-21swapper/122:20:071
21392110,1sleep10-21swapper/123:25:001
1964499118,2cyclictest23327-21kworker/u8:020:37:043
1964499118,2cyclictest17348-21kworker/u8:219:46:043
1964499118,2cyclictest11790-21kworker/u8:220:30:043
1964499118,2cyclictest0-21swapper/300:09:243
1964499112,2cyclictest2684-21switchtime21:06:043
1964399118,2cyclictest0-21swapper/220:00:152
1964399118,2cyclictest0-21swapper/219:35:122
1964399110,2cyclictest0-21swapper/219:27:392
1964399110,1cyclictest0-21swapper/219:10:152
1964299118,2cyclictest0-21swapper/123:46:371
1964299118,2cyclictest0-21swapper/123:36:041
1964299118,2cyclictest0-21swapper/121:30:001
1964299118,2cyclictest0-21swapper/100:25:131
1964299110,9cyclictest30134-21cpuspeed_turbos20:55:111
1964299110,9cyclictest29353-21grep22:10:171
1964299110,9cyclictest27402-21munin-node1
1964299110,9cyclictest11540-21cut20:10:001
1964299110,9cyclictest0-21swapper/123:20:131
1964299110,9cyclictest0-21swapper/120:41:021
1964299110,9cyclictest0-21swapper/120:30:161
1964299110,9cyclictest0-21swapper/120:10:121
1964299110,5cyclictest0-21swapper/120:52:051
1964299110,2cyclictest0-21swapper/122:37:411
1964299110,2cyclictest0-21swapper/120:45:111
1964299110,10cyclictest0-21swapper/122:25:311
1964299110,10cyclictest0-21swapper/100:16:491
1964199118,2cyclictest0-21swapper/019:40:110
1964199118,2cyclictest0-21swapper/019:25:120
1964199110,7cyclictest0-21swapper/020:25:020
1964499107,2cyclictest28036-21kworker/u8:120:12:043
1964499107,2cyclictest25563-21kworker/u8:120:45:043
1964499107,2cyclictest0-21swapper/320:55:113
1964499100,2cyclictest0-21swapper/321:00:163
1964399107,2cyclictest0-21swapper/220:16:002
1964399107,2cyclictest0-21swapper/219:55:152
1964399103,5cyclictest0-21swapper/219:15:112
1964399101,5cyclictest0-21swapper/219:30:102
1964299100,9cyclictest27932-21kworker/u8:221:30:011
1964299100,9cyclictest0-21swapper/123:57:551
1964299100,9cyclictest0-21swapper/122:06:241
1964299100,9cyclictest0-21swapper/119:50:151
1964299100,4cyclictest0-21swapper/119:14:051
1964299100,2cyclictest0-21swapper/119:45:111
1964299100,2cyclictest0-21swapper/100:10:121
1964199107,2cyclictest0-21swapper/020:22:390
1964199105,3cyclictest30725-21tail20:55:140
180022100,1sleep10-21swapper/123:40:281
25502290,2sleep00-21swapper/020:43:190
196449996,2cyclictest17348-21kworker/u8:219:19:043
196449996,2cyclictest17348-21kworker/u8:219:10:043
196449994,3cyclictest3728-21runrttasks19:56:423
196449994,3cyclictest31206-21timerandwakeup19:36:013
196449994,3cyclictest26219-21df_abs19:25:133
196449994,3cyclictest24004-21aten2.4_r3power20:40:123
196449994,3cyclictest16177-21fschecks_count20:20:133
196449994,3cyclictest0-21swapper/320:15:153
196449990,8cyclictest0-21swapper/319:30:153
196439996,2cyclictest0-21swapper/220:20:592
196439994,3cyclictest28392-21fschecks_time20:50:132
196439994,3cyclictest24572-21grep19:20:152
196429996,2cyclictest0-21swapper/119:40:151
196429996,2cyclictest0-21swapper/119:30:151
196429990,8cyclictest17769-21munin-node1
196429990,8cyclictest0-21swapper/120:15:101
196429990,2cyclictest0-21swapper/119:35:141
196419994,3cyclictest3889-21df_abs19:50:130
196419994,3cyclictest3322-21cron19:50:000
196419994,3cyclictest30227-21df_abs19:35:120
196419994,3cyclictest26120-21cut20:45:120
16794290,2sleep30-21swapper/323:40:063
196449983,3cyclictest29076-21grep20:51:003
196449983,3cyclictest24194-21df19:20:123
196449983,3cyclictest10035-21df_abs20:05:133
196449980,7cyclictest0-21swapper/319:50:133
196419983,3cyclictest21789-21seq20:35:090
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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