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2026-04-18 - 12:14

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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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.

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 Sat Apr 18, 2026 00:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
142582923580,2sleep375-21kworker/3:1-events20:26:213
1345876997367,5cyclictest1466628-21kworker/u8:1+events_unbound22:01:281
1345876997266,4cyclictest1591576-21kworker/u8:0+events_unbound23:26:271
1345876996962,5cyclictest1516745-21kworker/u8:2+flush-8:023:11:281
1345876996762,4cyclictest1245486-21kworker/u8:0+events_unbound19:15:021
1345876996760,5cyclictest1591576-21kworker/u8:0+events_unbound23:16:231
1345876996557,6cyclictest1460860-21kworker/u8:0+flush-8:021:26:291
1345876996458,4cyclictest1451992-21kworker/u8:3+events_unbound21:16:281
1345876996256,4cyclictest1451992-21kworker/u8:3+events_unbound20:56:261
1345876996155,4cyclictest1545642-21kworker/u8:1+events_unbound22:36:291
1345876996055,3cyclictest1466628-21kworker/u8:1+events_unbound22:06:141
1345876995952,6cyclictest1460860-21kworker/u8:0+flush-8:021:06:251
1345876995952,5cyclictest1516745-21kworker/u8:2+events_unbound22:21:221
1345876995851,5cyclictest1496280-21kworker/u8:3+events_unbound00:01:131
1345876995751,5cyclictest1496280-21kworker/u8:3+flush-8:023:41:291
1345876995748,7cyclictest280-21systemd-journal23:55:011
1345876995652,3cyclictest501982-21kworker/u8:3+flush-8:019:21:291
1345876995650,4cyclictest1545642-21kworker/u8:1+flush-8:022:46:251
1345876995650,4cyclictest1516745-21kworker/u8:2+events_unbound22:51:121
1345876995650,4cyclictest1340830-21kworker/u8:2+flush-8:020:21:271
1345876995649,5cyclictest501982-21kworker/u8:3+flush-8:019:46:251
1345876995649,5cyclictest501982-21kworker/u8:3+flush-8:019:46:251
1345876995649,5cyclictest501982-21kworker/u8:3+events_unbound19:36:261
1345876995648,6cyclictest1432163-21kworker/u8:1+flush-8:020:36:261
1345876995647,7cyclictest1501498-21latency_hist21:45:001
1345876995550,4cyclictest1466628-21kworker/u8:1+events_unbound21:21:131
1345876995549,5cyclictest1601257-21kworker/u8:1+events_unbound00:26:241
1345876995548,5cyclictest1496280-21kworker/u8:3+events_unbound23:31:241
1345875995544,9cyclictest1447386-21diskstats20:51:140
1345876995450,3cyclictest1635913-21kworker/u8:2+flush-8:000:21:311
1345876995449,3cyclictest1481393-21kworker/u8:2+flush-8:021:31:291
1345876995448,5cyclictest501982-21kworker/u8:3+events_unbound19:51:131
1345876995448,4cyclictest1635913-21kworker/u8:2+flush-8:000:11:151
1345876995348,4cyclictest1340830-21kworker/u8:2+flush-8:020:01:231
1345876995346,6cyclictest501982-21kworker/u8:3+flush-8:020:11:261
1345875995348,4cyclictest1432163-21kworker/u8:1+flush-8:020:56:280
1345876995247,4cyclictest501982-21kworker/u8:3+flush-8:019:56:301
1345876995246,4cyclictest1591576-21kworker/u8:0+events_unbound23:46:271
1345876995246,4cyclictest1545642-21kworker/u8:1+events_unbound23:06:141
1345876995246,4cyclictest1460860-21kworker/u8:0+flush-8:021:01:301
1345876995245,5cyclictest1432163-21kworker/u8:1+flush-8:020:51:231
1345876995245,5cyclictest1245486-21kworker/u8:0+events_unbound20:41:181
1345876995147,3cyclictest1545642-21kworker/u8:1+events_unbound22:41:281
1345876995146,4cyclictest1245486-21kworker/u8:0+flush-8:020:31:271
1345876995144,5cyclictest1460860-21kworker/u8:0+flush-8:021:46:141
1345876995045,3cyclictest1496280-21kworker/u8:3+flush-8:021:56:291
1345876995044,4cyclictest1601257-21kworker/u8:1+flush-8:000:16:141
1345876995044,4cyclictest1545642-21kworker/u8:1+flush-8:022:56:151
1345876994944,3cyclictest501982-21kworker/u8:3+events_unbound20:26:181
1345876994943,5cyclictest1591576-21kworker/u8:0+events_unbound23:36:141
1345876994943,5cyclictest1591576-21kworker/u8:0+events_unbound23:36:141
1345876994943,5cyclictest1526111-21kworker/u8:0+events_unbound22:16:251
1345876994843,4cyclictest1545642-21kworker/u8:1+events_unbound22:26:271
1345876994540,4cyclictest1496280-21kworker/u8:3+events_unbound00:35:011
1345876994540,4cyclictest1451992-21kworker/u8:3+flush-8:021:11:181
1345876994538,5cyclictest1516745-21kworker/u8:2+events_unbound22:31:201
1345876994532,9cyclictest280-21systemd-journal20:20:011
1345875994534,7cyclictest280-21systemd-journal20:05:210
1345875994440,3cyclictest1340830-21kworker/u8:2+events_unbound20:05:010
1345875994436,6cyclictest1635869-21latency_hist00:00:010
1345875994435,6cyclictest1591348-21latency_hist23:15:010
1345876994338,4cyclictest1516745-21kworker/u8:2+events_unbound23:05:001
1345876994337,4cyclictest1591576-21kworker/u8:0+flush-8:023:56:171
1345876994336,6cyclictest1601257-21kworker/u8:1+events_unbound00:36:151
1345876994334,7cyclictest1346124-21apt-get19:11:091
1345875994339,3cyclictest1466628-21kworker/u8:1+events_unbound21:56:200
1345875994334,6cyclictest1571606-21latency_hist22:55:010
1345876994237,4cyclictest1245486-21kworker/u8:0+events_unbound20:50:001
1345876994236,4cyclictest501982-21kworker/u8:3+flush-8:019:26:241
1345876994236,4cyclictest1460860-21kworker/u8:0+flush-8:021:51:251
1345881994134,5cyclictest501982-21kworker/u8:3+flush-8:019:31:282
1345876994136,4cyclictest1496280-21kworker/u8:3+events_unbound00:06:311
1345875994131,7cyclictest1521473-21latency_hist22:05:010
1345876994034,4cyclictest1516745-21kworker/u8:2+events_unbound22:11:241
1345875993932,5cyclictest280-21systemd-journal19:56:210
1345875993929,8cyclictest1621678-21diskstats23:46:150
1345881993828,7cyclictest280-21systemd-journal22:40:002
1345881993731,5cyclictest1340830-21kworker/u8:2+flush-8:019:51:272
1345875993731,4cyclictest1496280-21kworker/u8:3+events_unbound00:15:010
1345875993728,6cyclictest1496526-21latency_hist21:40:010
1345875993728,6cyclictest1496526-21latency_hist21:40:010
1345876993632,3cyclictest1481393-21kworker/u8:2+events_unbound21:36:281
1345876993632,3cyclictest1481393-21kworker/u8:2+events_unbound21:36:281
1345875993629,5cyclictest1340830-21kworker/u8:2+flush-8:019:15:040
1345875993629,4cyclictest1545642-21kworker/u8:1+flush-8:022:31:230
1345881993530,4cyclictest1460860-21kworker/u8:0+flush-8:021:51:292
1345881993528,5cyclictest1516745-21kworker/u8:2+events_unbound22:11:302
1345875993526,6cyclictest280-21systemd-journal20:33:370
1345875993428,4cyclictest280-21systemd-journal21:17:000
1345881993329,3cyclictest1516276-21idleruntime-cro22:00:012
1345881993329,3cyclictest1496280-21kworker/u8:3+flush-8:021:41:262
1345875993323,8cyclictest280-21systemd-journal21:45:000
1345881993228,3cyclictest1526111-21kworker/u8:0+events_unbound22:10:012
1345876993228,3cyclictest1340830-21kworker/u8:2+flush-8:020:07:461
1345875993227,3cyclictest1358673-21irqrtprio19:21:180
1345875993226,4cyclictest501982-21kworker/u8:3+flush-8:019:36:270
1345876993127,3cyclictest1591576-21kworker/u8:0+events_unbound23:21:261
1345875993126,4cyclictest1591576-21kworker/u8:0+flush-8:023:16:280
1345875993126,4cyclictest1340830-21kworker/u8:2+flush-8:020:21:290
1345875993126,3cyclictest1507077-21fschecks_time21:51:150
1345875993124,5cyclictest1601257-21kworker/u8:1+events_unbound00:30:000
1345881993026,3cyclictest1436901-21idleruntime-cro20:39:592
1345881993025,4cyclictest1460860-21kworker/u8:0+events_unbound21:01:262
1345881992925,3cyclictest1516745-21kworker/u8:2+events_unbound22:31:162
1345876992925,3cyclictest501982-21kworker/u8:3+flush-8:019:41:411
1345876992924,3cyclictest1340830-21kworker/u8:2+events_unbound19:30:091
1345875992924,3cyclictest1432163-21kworker/u8:1+events_unbound21:01:120
1345875992920,6cyclictest1541258-21apt-get22:25:030
1345881992820,6cyclictest1482029-21apt-get21:26:102
1345875992824,3cyclictest1516745-21kworker/u8:2+flush-8:023:08:510
1345875992824,2cyclictest1350775-21systemd-run19:15:000
1345875992820,6cyclictest1516745-21kworker/u8:2+flush-8:022:21:230
1345881992723,3cyclictest1591576-21kworker/u8:0+flush-8:023:56:242
1345881992723,2cyclictest1502051-21cpuspeed_turbos21:46:122
1345881992723,2cyclictest1462298-21fschecks_time21:06:152
1345881992723,2cyclictest1422481-21aten2_r5power_e20:26:132
1345881992722,3cyclictest1397975-21tr20:01:132
1345875992724,2cyclictest1655984-21systemd-run00:20:010
1345875992723,2cyclictest0-21swapper/000:05:000
1345875992722,3cyclictest1668548-21kthreadcore00:31:210
1345875992720,5cyclictest1496280-21kworker/u8:3+events_unbound22:06:210
1345875992717,8cyclictest1641441-21diskstats00:06:150
1345881992622,3cyclictest1601257-21kworker/u8:1+events_unbound00:36:292
1345875992620,4cyclictest1387146-21unixbench_multi19:46:300
1345875992620,4cyclictest1387146-21unixbench_multi19:46:300
1345875992615,9cyclictest1437497-21diskstats20:41:140
1345881992521,2cyclictest0-21swapper/219:40:002
1345881992520,4cyclictest1650397-21unixbench_multi00:11:292
1345881992520,3cyclictest1641542-21fschecks_time00:06:152
1345881992519,4cyclictest1456693-21cron21:00:002
1345875992522,2cyclictest1545642-21kworker/u8:1+events_unbound22:41:220
1345875992521,3cyclictest1496280-21kworker/u8:3+flush-8:023:50:510
1345875992521,3cyclictest1462337-21fschecks_time21:06:150
1345875992520,3cyclictest1606908-21cut23:31:140
1345875992520,3cyclictest1516745-21kworker/u8:2+flush-8:022:56:250
1345875992519,4cyclictest501982-21kworker/u8:3+flush-8:020:26:290
1345875992519,4cyclictest1411828-21unixbench_multi20:11:300
1345875992516,6cyclictest1471595-21latency_hist21:15:010
1345881992421,2cyclictest1601632-21aten2_r5power_e23:26:112
1345881992421,2cyclictest1581859-21aten2_r5power_c23:06:122
1345881992420,3cyclictest1601257-21kworker/u8:1+events_unbound00:31:182
1345881992419,4cyclictest1496519-21cron21:40:002
1345881992419,4cyclictest1496519-21cron21:39:592
1345881992417,4cyclictest501982-21kworker/u8:3+events_unbound20:15:142
1345881992415,7cyclictest280-21systemd-journal21:20:002
1345875992421,2cyclictest1432163-21kworker/u8:1+events_unbound20:36:170
1345875992420,2cyclictest1442518-21cut20:46:140
1345875992420,2cyclictest1382599-21cron19:45:000
1345875992419,4cyclictest1460860-21kworker/u8:0+flush-8:021:46:250
1345875992419,3cyclictest0-21swapper/000:36:300
1345875992417,4cyclictest0-21swapper/022:46:110
1345875992413,7cyclictest1345873-21cat19:10:010
1345881992319,2cyclictest1595977-21unixbench_singl23:16:302
1345881992319,2cyclictest1577208-21fschecks_time23:01:162
1345881992319,2cyclictest1571275-21head22:51:292
1345881992318,3cyclictest1382297-21unixbench_singl19:41:312
1345881992311,9cyclictest1576549-21awk23:00:002
134588199230,8cyclictest15987522kthreadcore23:21:182
1345875992319,3cyclictest1482319-21fschecks_count21:26:150
1345875992319,2cyclictest0-21swapper/020:16:150
1345875992318,4cyclictest1496280-21kworker/u8:3+events_unbound23:41:230
1345875992311,9cyclictest280-21systemd-journal23:40:000
1345875992311,9cyclictest280-21systemd-journal23:40:000
134588199222,19cyclictest0-21swapper/220:51:272
1345881992218,3cyclictest501982-21kworker/u8:3+events_unbound20:00:012
1345881992218,3cyclictest1466628-21kworker/u8:1+flush-8:021:31:152
1345881992218,2cyclictest1557220-21aten2_r5power_e22:41:112
1345881992218,2cyclictest1477149-21aten2_r5power_c21:21:132
1345881992218,2cyclictest0-21swapper/219:21:172
1345875992218,3cyclictest1545642-21kworker/u8:1+flush-8:022:38:520
1345875992217,3cyclictest0-21swapper/023:25:010
134587599221,20cyclictest1536162-21sshd22:18:210
134588199218,11cyclictest161rcu_preempt00:16:262
1345881992118,2cyclictest1611829-21fschecks_count23:36:152
1345881992118,2cyclictest1611829-21fschecks_count23:36:152
1345881992118,2cyclictest1517142-21fschecks_count22:01:132
1345875992117,2cyclictest0-21swapper/021:21:140
1345875992116,3cyclictest0-21swapper/019:55:000
1345875992115,3cyclictest0-21swapper/021:31:110
13453352214,10sleep20-21swapper/219:06:312
134229222111,6sleep30-21swapper/319:06:203
13410692214,11sleep10-21swapper/119:05:341
134588199202,12cyclictest1586750-21apt-get23:11:132
1345881992017,2cyclictest0-21swapper/222:50:002
1345881992016,3cyclictest0-21swapper/219:20:002
1345881992016,2cyclictest0-21swapper/222:25:012
1345881992015,3cyclictest1535927-21unixbench_multi22:16:302
1345881992010,8cyclictest280-21systemd-journal23:31:202
1345875992015,4cyclictest1635913-21kworker/u8:2+flush-8:000:21:200
1345875992015,3cyclictest1367205-21unixbench_singl19:26:290
1345875992015,3cyclictest0-21swapper/023:03:200
1345875992014,4cyclictest1528089-21kthreadcore22:11:190
13461132190,2sleep3471rcuc/319:11:093
134588199196,9cyclictest1407610-21apt-get20:11:112
1345881991915,2cyclictest1382978-21aten2_r5power_c19:46:122
1345881991915,2cyclictest1382978-21aten2_r5power_c19:46:122
1345881991910,6cyclictest1641046-21grep00:05:012
134587599191,16cyclictest1606217-21awk23:30:000
15100412180,3sleep375-21kworker/3:1-events21:51:203
1345881991814,2cyclictest0-21swapper/220:06:122
134588199181,12cyclictest1621429-21apt-get23:46:122
1345881991810,6cyclictest1657890-21sshd00:21:212
1345881991810,6cyclictest1469353-21cut21:11:192
1345875991813,3cyclictest0-21swapper/019:31:120
15350232170,3chrt75-21kworker/3:1+events22:16:203
1345881991713,2cyclictest1367512-21latency_hist19:30:002
1345881991713,2cyclictest0-21swapper/220:31:122
1345881991713,2cyclictest0-21swapper/219:11:122
1345881991712,3cyclictest1620764-21unixbench_singl23:41:302
1345881991712,3cyclictest1421302-21ntpq20:21:242
134588199170,15cyclictest1439338-21tr20:41:202
134588199169,4cyclictest1626599-21sh23:51:132
134588199167,7cyclictest1663963-21tr00:26:202
134588199167,7cyclictest1542658-21sed22:26:172
1345881991611,3cyclictest0-21swapper/220:46:202
15378872143,7sleep30-21swapper/322:21:193
16449592132,7sleep30-21swapper/300:06:253
16350872132,7sleep30-21swapper/323:56:263
15777802132,7sleep30-21swapper/323:01:193
15671252130,3sleep375-21kworker/3:1+events22:51:123
15464492132,6sleep30-21swapper/322:30:023
14570222132,7sleep30-21swapper/321:01:093
13974212132,6sleep30-21swapper/320:00:023
16708102122,5sleep30-21swapper/300:35:023
16622452122,6sleep30-21swapper/300:26:193
16553382122,6sleep30-21swapper/300:16:283
16458362122,6sleep30-21swapper/300:10:023
16263632122,6sleep30-21swapper/323:51:123
16210262122,6sleep30-21swapper/323:44:223
16109772122,6sleep30-21swapper/323:32:183
15965742122,6sleep30-21swapper/323:20:223
15814772122,5sleep30-21swapper/323:05:013
15607092123,5sleep30-21swapper/322:41:213
15519562122,6sleep30-21swapper/322:36:123
15280272122,6sleep30-21swapper/322:11:193
15222312122,6sleep30-21swapper/322:06:143
15203822120,7sleep30-21swapper/322:01:213
15043752122,6sleep30-21swapper/321:46:203
15009042122,6sleep30-21swapper/321:41:303
14915702122,6sleep30-21swapper/321:35:003
14817072122,5sleep30-21swapper/321:25:013
14773672122,6sleep30-21swapper/321:21:163
14665902122,6sleep30-21swapper/321:10:003
14468842122,6sleep30-21swapper/320:50:023
14366632122,6sleep30-21swapper/320:37:143
14300012122,6sleep30-21swapper/320:31:203
14179602122,6sleep30-21swapper/320:21:173
14108982122,6sleep30-21swapper/320:11:213
14030502122,6sleep30-21swapper/320:06:163
13973212122,6sleep30-21swapper/319:59:213
13834212122,6sleep30-21swapper/319:46:173
13834212122,6sleep30-21swapper/319:46:173
13666402122,6sleep30-21swapper/319:26:233
13533422122,6sleep30-21swapper/319:16:163
16661242112,5sleep30-21swapper/300:30:403
16600542112,5sleep30-21swapper/300:21:263
16371302112,5sleep30-21swapper/300:01:193
16215852112,5sleep30-21swapper/323:46:143
16117852112,5sleep30-21swapper/323:36:153
16117852112,5sleep30-21swapper/323:36:153
16015802112,5sleep30-21swapper/323:26:123
15916062112,5sleep30-21swapper/323:15:273
15867242112,5sleep30-21swapper/323:11:113
15716952112,5sleep30-21swapper/322:55:023
15623452112,5sleep30-21swapper/322:46:153
15417142112,5sleep30-21swapper/322:25:043
15152602112,5sleep30-21swapper/321:56:233
14918482112,6sleep30-21swapper/321:35:323
14918482112,6sleep30-21swapper/321:35:323
14719012112,5sleep30-21swapper/321:16:103
14669642112,5sleep30-21swapper/321:11:123
14520382112,6sleep30-21swapper/320:56:043
14421362112,5sleep30-21swapper/320:45:363
14374932111,6sleep30-21swapper/320:41:153
14124192112,5sleep30-21swapper/320:15:033
13891012112,5sleep30-21swapper/319:51:193
13818582112,5sleep30-21swapper/319:41:283
13681932112,5sleep30-21swapper/319:31:163
13575892112,5sleep30-21swapper/319:20:013
13726912102,5sleep30-21swapper/319:35:023
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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