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2026-04-09 - 23:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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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  Intel
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Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system
Characteristics of the highest latencies:
System rack5slot4s.osadl.org (updated Thu Apr 09, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10081452590,4sleep10-21swapper/108:26:271
927935995446,6cyclictest280-21systemd-journal08:31:350
927935994639,6cyclictest1084119-21kworker/u8:1+flush-8:009:51:300
927935994540,4cyclictest1103315-21kworker/u8:3+flush-8:010:56:360
927935994540,4cyclictest1103315-21kworker/u8:3+flush-8:010:56:360
927935994535,7cyclictest1123499-21latency_hist10:25:010
927938994339,3cyclictest1059142-21kworker/u8:1+flush-8:009:31:361
927935994237,4cyclictest1103315-21kworker/u8:3+flush-8:010:36:290
927935994237,3cyclictest1222921-21latency_hist12:05:010
927935994235,5cyclictest917997-21kworker/u8:2+flush-8:007:26:330
927935994232,8cyclictest1049318-21/usr/sbin/munin09:11:290
11872592420,2sleep30-21swapper/311:26:313
927938994137,3cyclictest876084-21kworker/u8:3+flush-8:008:36:341
927938994136,4cyclictest917997-21kworker/u8:2+flush-8:008:01:211
927938994135,4cyclictest1103315-21kworker/u8:3+events_unbound10:36:321
927935994137,3cyclictest917997-21kworker/u8:2+events_unbound07:21:230
927938994035,4cyclictest1059142-21kworker/u8:1+flush-8:009:21:341
927935993935,3cyclictest1059142-21kworker/u8:1+flush-8:009:31:210
927935993934,4cyclictest917997-21kworker/u8:2+flush-8:007:51:250
927935993934,4cyclictest1103315-21kworker/u8:3+events_unbound11:26:300
927938993834,3cyclictest1148031-21kworker/u8:1+flush-8:010:51:251
927935993828,8cyclictest1241884-21ntpq12:21:310
927935993733,3cyclictest1192576-21kworker/u8:2+events_unbound11:36:170
927938993630,5cyclictest1197769-21kworker/u8:0+flush-8:012:11:291
927938993627,7cyclictest1064193-21/usr/sbin/munin09:26:301
927935993626,8cyclictest968569-21ntpq07:46:310
927935993623,4cyclictest1092995-21kworker/u8:0+events_unbound10:11:360
927940993526,7cyclictest280-21systemd-journal08:53:532
927938993530,3cyclictest917997-21kworker/u8:2+flush-8:007:26:341
927938993525,8cyclictest1207035-21ntpq11:46:321
927935993529,4cyclictest876084-21kworker/u8:3+flush-8:009:41:240
927935993528,5cyclictest1024616-21/usr/sbin/munin08:46:340
12160212350,5chrt0-21swapper/011:56:260
11055912350,2sleep3481ktimers/310:06:253
927938993428,4cyclictest1014136-21kworker/u8:2+flush-8:009:11:321
927935993429,3cyclictest984187-21unixbench_multi08:01:440
927935993429,3cyclictest1118803-21kworker/u8:2+flush-8:010:46:270
927935993427,5cyclictest1163560-21apt-get11:06:180
9276202344,24sleep10-21swapper/107:07:581
927938993328,4cyclictest1161448-21kworker/u8:0+flush-8:011:11:221
927938993327,5cyclictest876084-21kworker/u8:3+flush-8:007:16:321
927938993327,5cyclictest1014136-21kworker/u8:2+flush-8:008:41:371
927935993329,3cyclictest917997-21kworker/u8:2+flush-8:007:15:060
927935993329,3cyclictest876084-21kworker/u8:3+flush-8:007:31:250
927935993329,3cyclictest1212208-21kworker/u8:1+flush-8:012:06:330
927935993328,4cyclictest1118803-21kworker/u8:2+flush-8:010:41:250
927935993328,3cyclictest1059142-21kworker/u8:1+events_unbound09:26:250
927935993326,6cyclictest1084119-21kworker/u8:1+flush-8:010:16:290
927935993326,5cyclictest1088455-21grep09:46:350
927935993326,5cyclictest1084119-21kworker/u8:1+flush-8:010:31:210
927938993228,3cyclictest917997-21kworker/u8:2+events_unbound07:51:241
927938993228,3cyclictest1014136-21kworker/u8:2+flush-8:009:01:261
927938993227,4cyclictest952161-21kworker/u8:0+events_unbound08:16:341
927938993227,4cyclictest1161448-21kworker/u8:0+flush-8:011:16:321
927938993227,4cyclictest1118803-21kworker/u8:2+flush-8:010:21:311
927938993227,3cyclictest952161-21kworker/u8:0+events_unbound07:45:011
927938993226,4cyclictest1103315-21kworker/u8:3+events_unbound11:41:231
927938993226,4cyclictest1092995-21kworker/u8:0+flush-8:009:56:321
927938993224,6cyclictest928288-21aten2_r5power_p07:11:191
927938993224,6cyclictest1153317-21kworker/u8:2+flush-8:011:01:271
927938993125,5cyclictest876084-21kworker/u8:3+events_unbound09:41:451
927938993125,4cyclictest917997-21kworker/u8:2+events_unbound07:56:251
927938993125,4cyclictest1237971-21kworker/u8:2+events_unbound12:36:341
927938993125,4cyclictest1033262-21needreboot08:51:281
927938993124,5cyclictest1089260-21aten2_r5power_p09:51:171
927938993123,6cyclictest1213299-21/usr/sbin/munin11:56:281
927935993127,3cyclictest1212208-21kworker/u8:1+flush-8:012:31:320
927935993127,2cyclictest1188567-21cpuspeed_turbos11:31:200
927935993126,3cyclictest1103315-21kworker/u8:3+flush-8:011:11:330
927935993123,6cyclictest280-21systemd-journal08:40:000
927935993121,8cyclictest280-21systemd-journal11:23:530
9275542313,9sleep20-21swapper/207:07:072
927940993024,4cyclictest280-21systemd-journal09:44:532
927938993026,3cyclictest952161-21kworker/u8:0+flush-8:008:06:341
927938993026,2cyclictest994410-21systemd-run08:15:001
927938993024,5cyclictest1103315-21kworker/u8:3+flush-8:011:26:291
927938993023,5cyclictest1103315-21kworker/u8:3+flush-8:010:26:301
927935993026,3cyclictest1192576-21kworker/u8:2+events_unbound11:41:350
927935993025,3cyclictest1014136-21kworker/u8:2+flush-8:009:16:260
927935993024,5cyclictest917997-21kworker/u8:2+flush-8:007:41:290
927935993020,8cyclictest975223-21diskstats07:56:200
92793599301,26cyclictest1038543-21taskset08:56:350
927940992926,2cyclictest1142958-21unixbench_multi10:41:362
927940992924,3cyclictest1187633-21unixbench_multi11:26:352
927938992925,3cyclictest940951-21kthreadcore07:21:251
927938992924,4cyclictest1192576-21kworker/u8:2+flush-8:011:36:351
927938992924,3cyclictest1242726-21systemd-run12:25:001
927935992925,3cyclictest1092995-21kworker/u8:0+flush-8:009:56:190
927935992920,7cyclictest1152397-21ntpq10:51:300
927940992824,2cyclictest974387-21cron07:55:002
927940992823,3cyclictest1213411-21aten2_r5power_p11:56:182
927938992824,2cyclictest0-21swapper/108:46:291
927938992821,5cyclictest1197769-21kworker/u8:0+flush-8:012:16:301
927938992820,6cyclictest280-21systemd-journal07:36:301
927938992818,8cyclictest1102838-21ntpq10:01:281
927935992824,3cyclictest876084-21kworker/u8:3+events_unbound08:21:350
927935992824,3cyclictest1161448-21kworker/u8:0+flush-8:011:01:340
927935992824,3cyclictest1118803-21kworker/u8:2+events_unbound10:26:230
927935992824,2cyclictest1039780-21fschecks_count09:01:220
927935992819,6cyclictest1103705-21latency_hist10:05:010
92793599281,26cyclictest959565-21kworker/0:1+events08:06:260
12032042280,3sleep375-21kworker/3:1+events11:46:173
927940992717,8cyclictest280-21systemd-journal10:02:532
927938992723,3cyclictest1084119-21kworker/u8:1+flush-8:009:46:311
927938992722,4cyclictest0-21swapper/112:30:001
927938992721,5cyclictest952161-21kworker/u8:0+flush-8:008:31:381
927935992723,3cyclictest1014136-21kworker/u8:2+flush-8:008:51:260
927935992722,4cyclictest1014136-21kworker/u8:2+events_unbound09:06:190
927935992722,4cyclictest1014136-21kworker/u8:2+events_unbound09:06:190
92793599272,23cyclictest611-21sshd12:19:540
927935992721,4cyclictest876084-21kworker/u8:3+events_unbound08:16:240
927940992622,2cyclictest1053617-21unixbench_multi09:11:372
927940992621,3cyclictest984165-21unixbench_multi08:01:442
927940992621,3cyclictest1188613-21fschecks_count11:31:212
927938992622,3cyclictest1118803-21kworker/u8:2+events_unbound10:46:341
927938992622,3cyclictest1103315-21kworker/u8:3+events_unbound11:21:211
927938992622,3cyclictest1014136-21kworker/u8:2+events_unbound08:56:271
927938992621,4cyclictest1092995-21kworker/u8:0+events_unbound10:11:341
927938992620,3cyclictest0-21swapper/112:31:331
927938992619,5cyclictest1103315-21kworker/u8:3+events_unbound11:06:341
927938992611,5cyclictest1118803-21kworker/u8:2+flush-8:010:41:371
927935992621,4cyclictest1059142-21kworker/u8:1+flush-8:009:21:190
927935992621,3cyclictest1197769-21kworker/u8:0+events_unbound12:11:180
927940992522,2cyclictest1163778-21cpuspeed_turbos11:06:212
927940992520,3cyclictest1193486-21cpuspeed_turbos11:36:182
927938992521,3cyclictest876084-21kworker/u8:3+flush-8:008:21:321
927938992521,3cyclictest1014136-21kworker/u8:2+flush-8:009:06:411
927938992521,3cyclictest1014136-21kworker/u8:2+flush-8:009:06:411
927938992521,2cyclictest1212979-21cat11:55:001
927938992516,6cyclictest280-21systemd-journal07:50:001
927935992521,3cyclictest1237971-21kworker/u8:2+flush-8:012:36:270
927935992521,3cyclictest1103315-21kworker/u8:3+flush-8:010:07:070
927935992521,2cyclictest959546-21systemd-run07:40:010
927935992520,3cyclictest1078714-21runrttasks09:40:000
927935992519,4cyclictest1161448-21kworker/u8:0+flush-8:011:16:260
9276812252,6sleep00-21swapper/007:08:450
927940992421,2cyclictest1084463-21cpuspeed_turbos09:46:192
927940992419,3cyclictest1227840-21cron12:10:002
927938992420,2cyclictest0-21swapper/107:31:271
927938992419,4cyclictest1014136-21kworker/u8:2+flush-8:009:16:311
927938992419,2cyclictest0-21swapper/111:31:191
927938992418,4cyclictest1108369-21unixbench_singl10:06:351
927938992418,4cyclictest1078708-21latency_hist09:40:011
927938992417,5cyclictest1157953-21unixbench_singl10:56:361
927938992417,5cyclictest1157953-21unixbench_singl10:56:361
927935992419,4cyclictest1246842-21kworker/u8:0+events_unbound12:26:310
927935992419,3cyclictest1020321-21sort08:41:240
92793599241,20cyclictest1207887-21munin-run11:50:010
927940992319,3cyclictest0-21swapper/211:15:012
927940992319,2cyclictest1243131-21aten2_r5power_p12:26:182
927940992319,2cyclictest1113275-21unixbench_singl10:11:372
927940992319,2cyclictest1044482-21aten2_r5power_e09:06:182
927940992319,2cyclictest1044482-21aten2_r5power_e09:06:182
927940992318,3cyclictest876084-21kworker/u8:3+events_unbound09:50:432
927940992318,3cyclictest0-21swapper/207:15:042
92794099230,9cyclictest10081492grep08:26:272
927938992318,4cyclictest1084119-21kworker/u8:1+flush-8:010:30:311
927938992316,5cyclictest1212208-21kworker/u8:1+flush-8:012:06:301
927935992316,5cyclictest952161-21kworker/u8:0+events_unbound08:11:310
927935992314,7cyclictest1212229-21ntpq11:51:320
927940992219,2cyclictest940110-21aten2_r5power_p07:21:192
927940992218,3cyclictest1039119-21idleruntime-cro09:00:002
927940992218,2cyclictest964931-21aten2_r5power_e07:46:202
927940992218,2cyclictest1152937-21unixbench_multi10:51:372
927940992216,4cyclictest954193-21unixbench_singl07:31:342
927938992217,4cyclictest1118207-21unixbench_singl10:16:361
927938992213,7cyclictest1222061-21ntpq12:01:291
927935992217,4cyclictest876084-21kworker/u8:3+events_unbound08:26:220
927935992217,3cyclictest917997-21kworker/u8:2+events_unbound07:11:190
927940992118,2cyclictest985154-21fschecks_count08:06:212
927940992118,2cyclictest1059372-21aten2_r5power_v09:21:192
927940992117,3cyclictest1143741-21aten2_r5power_e10:46:192
927940992117,2cyclictest1123958-21aten2_r5power_v10:26:182
927940992116,3cyclictest1178678-21cpuspeed_turbos11:21:192
927940992112,6cyclictest1208242-21cat11:50:012
927940992017,2cyclictest1173560-21aten2_r5power_p11:16:192
927940992017,2cyclictest1119002-21aten2_r5power_v10:21:192
927940992017,2cyclictest1024994-21fschecks_time08:46:202
927940992016,2cyclictest1020020-21fschecks_count08:41:212
927940992016,2cyclictest0-21swapper/209:20:012
927940991915,2cyclictest0-21swapper/207:26:172
927940991911,6cyclictest977945-21tr07:56:262
927940991911,6cyclictest1073733-21cron09:35:002
927940991815,2cyclictest1222588-21unixbench_singl12:01:362
927940991814,2cyclictest1113998-21aten2_r5power_e10:16:182
927940991814,2cyclictest0-21swapper/208:11:352
92794099181,12cyclictest1104049-21apt-get10:06:182
927940991810,6cyclictest1251269-21tr12:31:282
927940991810,6cyclictest1155257-21tr10:56:252
927940991810,6cyclictest1155257-21tr10:56:242
92794099180,5cyclictest10185192ntp_kernel_pll_08:36:292
9232092183,8sleep30-21swapper/307:06:153
12222932187,7sleep30-21swapper/312:01:353
92794099179,6cyclictest1065716-21tr09:26:272
92794099178,7cyclictest1199495-21tr11:41:242
927940991713,2cyclictest959505-21basename07:40:002
927940991713,2cyclictest0-21swapper/210:36:232
927940991713,2cyclictest0-21swapper/208:21:302
927940991713,2cyclictest0-21swapper/208:16:202
9697862162,9sleep30-21swapper/307:51:183
92794099167,7cyclictest1040590-21tr09:01:272
92794099162,13cyclictest0-21swapper/212:20:292
92794099162,13cyclictest0-21swapper/209:39:592
92794099162,13cyclictest0-21swapper/208:30:442
927940991613,2cyclictest0-21swapper/212:35:422
927940991613,2cyclictest0-21swapper/212:14:502
927940991613,2cyclictest0-21swapper/211:01:572
927940991613,2cyclictest0-21swapper/210:32:052
927940991612,2cyclictest0-21swapper/212:16:352
927940991612,2cyclictest0-21swapper/209:56:342
927940991612,2cyclictest0-21swapper/207:11:372
92794099161,11cyclictest959867-21apt-get07:41:172
11238472162,9sleep30-21swapper/310:26:163
927940991410,2cyclictest0-21swapper/211:51:232
11555342143,7sleep30-21swapper/310:56:263
11555342143,7sleep30-21swapper/310:56:263
9945282132,6sleep30-21swapper/308:15:023
11978852132,7sleep30-21swapper/311:40:003
11805382132,7sleep30-21swapper/311:21:263
11598882132,7sleep30-21swapper/311:01:243
11383952132,5sleep30-21swapper/310:40:013
11373812132,7sleep30-21swapper/310:36:283
10689102132,6sleep30-21swapper/309:30:023
10679912132,7sleep30-21swapper/309:26:333
9997382122,6sleep30-21swapper/308:21:203
9848662122,6sleep30-21swapper/308:06:193
9836722123,6sleep30-21swapper/308:01:373
9749032122,6sleep30-21swapper/307:55:443
9501702123,6sleep30-21swapper/307:31:203
9289162123,5sleep30-21swapper/307:11:253
12377672122,5sleep30-21swapper/312:20:013
12369662122,6sleep30-21swapper/312:16:323
12136962122,6sleep30-21swapper/311:56:223
12082912122,6sleep30-21swapper/311:50:043
12028532122,6sleep30-21swapper/311:44:543
11892312122,6sleep30-21swapper/311:31:263
11780202122,6sleep30-21swapper/311:19:183
11728362122,6sleep30-21swapper/311:11:383
11474412124,5sleep30-21swapper/310:46:313
11285622122,6sleep30-21swapper/310:30:023
11184212122,6sleep30-21swapper/310:18:543
11033682122,6sleep30-21swapper/310:01:363
10888112122,6sleep30-21swapper/309:50:013
10787142122,5sleep30-21swapper/309:40:013
10749742122,6sleep30-21swapper/309:36:243
10443682123,6sleep30-21swapper/309:05:543
10443682123,6sleep30-21swapper/309:05:533
10345402122,6sleep30-21swapper/308:56:193
10292562122,5sleep30-21swapper/308:50:013
10251762122,6sleep30-21swapper/308:46:243
10043182122,5sleep30-21swapper/308:25:013
9897692112,5sleep30-21swapper/308:11:173
9647672112,5sleep30-21swapper/307:45:163
9599652112,6sleep30-21swapper/307:41:193
9592022112,5sleep30-21swapper/307:36:373
9446532112,5sleep30-21swapper/307:25:023
9436412112,6sleep30-21swapper/307:21:283
9330252112,6sleep30-21swapper/307:15:023
12528212112,5sleep30-21swapper/312:35:023
12484532112,5sleep30-21swapper/312:31:253
12431332112,5sleep30-21swapper/312:26:193
12280732113,5sleep30-21swapper/312:10:023
12236372112,5sleep30-21swapper/312:06:213
11640602112,6sleep30-21swapper/311:06:253
11485242112,6sleep30-21swapper/310:50:083
11187652112,5sleep30-21swapper/310:20:023
11094692112,6sleep30-21swapper/310:11:243
10940132112,5sleep30-21swapper/309:55:023
10891772112,5sleep30-21swapper/309:51:173
10592662112,5sleep30-21swapper/309:21:193
10542432112,6sleep30-21swapper/309:15:543
10493492112,6sleep30-21swapper/309:11:203
10399302112,5sleep30-21swapper/309:01:253
10196082112,5sleep30-21swapper/308:40:023
10146552112,6sleep30-21swapper/308:35:203
10135442111,6sleep30-21swapper/308:31:313
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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