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2026-07-08 - 09:28

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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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 Wed Jul 08, 2026 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
146503621860,2sleep30-21swapper/320:35:133
16686502640,3sleep375-21kworker/3:1-events00:00:053
1377008995852,4cyclictest1423993-21kworker/u8:3+events_unbound20:55:182
1377004995852,4cyclictest1593614-21kworker/u8:0+events_unbound23:15:271
1377004995752,3cyclictest1433530-21kworker/u8:1+events_unbound21:05:251
1377000995751,4cyclictest1433530-21kworker/u8:1+events_unbound21:55:260
1377008995650,4cyclictest1533022-21kworker/u8:0+flush-8:022:05:272
1377008995650,4cyclictest1463931-21kworker/u8:0+flush-8:021:20:262
14285222550,3sleep01428527-21unixbench_singl19:55:290
1377004995549,5cyclictest1533022-21kworker/u8:0+events_unbound22:10:201
1377004995549,4cyclictest1387861-21kworker/u8:0+events_unbound19:55:281
1377008995450,3cyclictest1230476-21kworker/u8:4+flush-8:019:20:002
1377004995447,5cyclictest1663203-21kworker/u8:3+flush-8:000:30:271
1377004995447,5cyclictest1663203-21kworker/u8:3+flush-8:000:30:261
1377004995444,8cyclictest1578737-21apt-get22:30:001
1377000995449,3cyclictest1518119-21kworker/u8:3+events_unbound21:30:240
1377008995345,5cyclictest1704890-21systemd-journal22:45:012
1377004995348,4cyclictest1613356-21kworker/u8:1+flush-8:023:10:261
1377004995347,4cyclictest1577824-21kworker/u8:2+events_unbound23:20:231
1377000995347,4cyclictest1577824-21kworker/u8:2+flush-8:023:05:260
1377004995246,4cyclictest1579509-21kworker/u8:4+flush-8:022:55:221
1377000995248,3cyclictest1423993-21kworker/u8:3+flush-8:020:15:270
1377004995146,4cyclictest1433530-21kworker/u8:1+events_unbound20:50:001
1377008995045,3cyclictest1593614-21kworker/u8:0+flush-8:022:50:112
1377004995046,3cyclictest1387861-21kworker/u8:0+flush-8:020:00:311
1377004995044,4cyclictest1640810-21kworker/u8:3+events_unbound23:30:231
1377004994945,3cyclictest1433530-21kworker/u8:1+events_unbound22:00:211
1377004994944,3cyclictest1518119-21kworker/u8:3+events_unbound21:35:091
1377004994939,8cyclictest1704890-21systemd-journal21:40:021
1377000994941,6cyclictest1579509-21kworker/u8:4+flush-8:022:50:220
1377008994844,3cyclictest1640810-21kworker/u8:3+events_unbound23:30:222
1377008994842,4cyclictest1577824-21kworker/u8:2+events_unbound22:35:222
1377004994842,4cyclictest1552872-21kworker/u8:3+flush-8:022:15:211
1377008994742,4cyclictest1423993-21kworker/u8:3+flush-8:020:15:212
1377004994641,3cyclictest1433530-21kworker/u8:1+events_unbound20:30:201
1377004994641,3cyclictest1423993-21kworker/u8:3+events_unbound20:25:201
1377004994640,4cyclictest1230476-21kworker/u8:4+events_unbound19:20:221
1377004994638,6cyclictest1577824-21kworker/u8:2+flush-8:023:25:201
1377000994641,3cyclictest1577824-21kworker/u8:2+flush-8:023:20:270
1377000994640,5cyclictest1552872-21kworker/u8:3+events_unbound22:15:220
1377008994540,4cyclictest1433530-21kworker/u8:1+events_unbound21:30:212
1377004994540,3cyclictest1433530-21kworker/u8:1+flush-8:020:50:211
1377004994539,5cyclictest1552872-21kworker/u8:3+flush-8:022:30:221
1377004994539,4cyclictest1230476-21kworker/u8:4+events_unbound19:40:251
1377004994538,5cyclictest1577824-21kworker/u8:2+flush-8:022:40:201
1377000994540,3cyclictest1433530-21kworker/u8:1+flush-8:022:00:260
1377000994539,4cyclictest1398953-21kworker/u8:2+flush-8:020:25:400
1377008994440,3cyclictest1577824-21kworker/u8:2+events_unbound22:25:232
1377008994439,4cyclictest1672495-21kworker/u8:4+flush-8:000:15:212
1377008994439,4cyclictest1398953-21kworker/u8:2+flush-8:020:10:212
1377008994438,4cyclictest1433530-21kworker/u8:1+flush-8:021:35:222
1377004994440,3cyclictest1398953-21kworker/u8:2+events_unbound20:10:121
1377004994439,4cyclictest1670435-21kworker/u8:2+events_unbound00:05:231
1377000994437,5cyclictest1488172-21kworker/u8:2+flush-8:021:50:100
1377000994432,10cyclictest1344359-21kworker/u8:1+flush-8:019:20:250
1377008994339,3cyclictest1577824-21kworker/u8:2+flush-8:023:00:202
1377008994337,4cyclictest1692488-21kworker/u8:0+events_unbound00:25:202
1377008994337,4cyclictest1692488-21kworker/u8:0+events_unbound00:25:202
1377008994336,5cyclictest1433530-21kworker/u8:1+events_unbound21:25:232
1377004994338,4cyclictest1433530-21kworker/u8:1+flush-8:021:10:201
1377004994338,3cyclictest1344359-21kworker/u8:1+flush-8:019:25:211
1377004994337,4cyclictest1387861-21kworker/u8:0+events_unbound19:30:251
1377004994335,6cyclictest1344359-21kworker/u8:1+flush-8:019:10:211
1377008994236,4cyclictest1663203-21kworker/u8:3+events_unbound00:10:122
1377004994235,5cyclictest1648102-21kworker/u8:2+events_unbound23:45:241
1377004994235,5cyclictest1504140-21/usr/sbin/munin21:15:241
1377004994235,5cyclictest1398953-21kworker/u8:2+flush-8:020:05:211
1377004994137,3cyclictest1552872-21kworker/u8:3+flush-8:022:20:261
1377004994136,4cyclictest1613356-21kworker/u8:1+events_unbound23:55:221
1377004994136,4cyclictest1579509-21kworker/u8:4+events_unbound22:50:251
1377004994135,5cyclictest1577824-21kworker/u8:2+events_unbound23:00:191
1377000994136,4cyclictest1463931-21kworker/u8:0+events_unbound20:40:080
1377000994135,5cyclictest1552872-21kworker/u8:3+flush-8:022:20:210
1377000994134,5cyclictest1433530-21kworker/u8:1+events_unbound21:00:360
137700099411,35cyclictest1578785-21munin-run22:30:000
1377008994034,5cyclictest1672495-21kworker/u8:4+events_unbound00:00:222
1377004994033,5cyclictest1704890-21systemd-journal21:05:001
1377000994034,5cyclictest1648102-21kworker/u8:2+flush-8:023:45:200
1377000994034,4cyclictest1640810-21kworker/u8:3+flush-8:023:30:200
1377000994034,4cyclictest1488172-21kworker/u8:2+events_unbound21:45:240
1377000994034,4cyclictest1433530-21kworker/u8:1+flush-8:021:10:220
1377008993935,3cyclictest1230476-21kworker/u8:4+flush-8:019:30:262
1377008993930,7cyclictest1418866-21gpgv19:50:012
1377008993929,8cyclictest1704890-21systemd-journal22:23:342
1377004993934,4cyclictest1579509-21kworker/u8:4+flush-8:022:45:201
1377004993931,5cyclictest1704890-21systemd-journal00:39:401
1377004993931,5cyclictest1704890-21systemd-journal00:39:391
1377000993935,3cyclictest1692488-21kworker/u8:0+events_unbound00:25:220
1377000993935,3cyclictest1692488-21kworker/u8:0+events_unbound00:25:210
1377000993934,4cyclictest1398953-21kworker/u8:2+events_unbound20:00:300
1377000993933,5cyclictest1414321-21kworker/u8:1+events_unbound19:45:200
1377008993833,4cyclictest1640810-21kworker/u8:3+events_unbound23:35:162
1377008993829,8cyclictest1344359-21kworker/u8:1+flush-8:019:25:202
1377004993833,4cyclictest1433530-21kworker/u8:1+events_unbound21:55:211
1377004993832,4cyclictest1433530-21kworker/u8:1+flush-8:020:35:221
1377004993831,6cyclictest1463931-21kworker/u8:0+events_unbound21:20:191
1377000993833,3cyclictest1433530-21kworker/u8:1+events_unbound21:15:250
1377004993733,3cyclictest1344359-21kworker/u8:1+events_unbound19:15:081
1377004993731,5cyclictest1692488-21kworker/u8:0+events_unbound00:20:201
1377004993731,5cyclictest1692488-21kworker/u8:0+events_unbound00:20:201
1377000993732,4cyclictest1593614-21kworker/u8:0+events_unbound23:40:260
1377000993732,3cyclictest1663203-21kworker/u8:3+flush-8:000:10:100
14139132360,2sleep3481ktimers/319:45:003
1377008993632,3cyclictest1488172-21kworker/u8:2+events_unbound21:45:002
1377004993630,4cyclictest1423993-21kworker/u8:3+flush-8:020:15:101
1377004993629,6cyclictest1398953-21kworker/u8:2+events_unbound19:50:221
1377004993620,4cyclictest1552872-21kworker/u8:3+flush-8:022:35:161
1377000993632,3cyclictest1463931-21kworker/u8:0+flush-8:021:20:220
1377000993632,3cyclictest1433530-21kworker/u8:1+flush-8:020:50:200
1377000993629,5cyclictest1623974-21apt-get23:15:050
1377000993628,5cyclictest1498110-21ntp_states21:05:210
1377008993530,4cyclictest1593614-21kworker/u8:0+flush-8:023:40:112
1377008993530,4cyclictest1577824-21kworker/u8:2+flush-8:023:25:062
1377008993526,7cyclictest1704890-21systemd-journal22:00:342
1377004993530,4cyclictest1552872-21kworker/u8:3+events_unbound22:05:101
1377004993530,3cyclictest1414321-21kworker/u8:1+flush-8:019:45:151
1377004993527,6cyclictest1454142-21cron20:25:001
1377004993429,4cyclictest1433530-21kworker/u8:1+flush-8:021:25:271
1377004993429,4cyclictest1433530-21kworker/u8:1+flush-8:020:40:251
1377004993429,3cyclictest1488172-21kworker/u8:2+flush-8:021:50:201
1377004993426,6cyclictest1693625-21apt-get00:25:031
1377004993426,6cyclictest1693625-21apt-get00:25:031
1377000993430,3cyclictest1672495-21kworker/u8:4+flush-8:000:00:260
1377000993430,3cyclictest1433530-21kworker/u8:1+events_unbound21:25:100
1377000993426,3cyclictest1613356-21kworker/u8:1+events_unbound23:11:060
13766982344,9sleep10-21swapper/119:08:151
1377008993328,3cyclictest1503068-21kworker/u8:3+events_unbound21:15:142
1377004993327,4cyclictest1658902-21cpuspeed_turbos23:50:081
1377004993327,4cyclictest1488172-21kworker/u8:2+events_unbound21:50:011
1377004993326,5cyclictest1614081-21apt-get23:05:061
1377000993331,1cyclictest1577824-21kworker/u8:2+events_unbound22:35:240
1377000993328,4cyclictest1533022-21kworker/u8:0+flush-8:022:10:240
1377000993328,4cyclictest1433530-21kworker/u8:1+flush-8:020:30:190
1377000993327,4cyclictest1423993-21kworker/u8:3+events_unbound20:20:230
1377000993327,4cyclictest1344359-21kworker/u8:1+events_unbound19:15:020
1377000993324,4cyclictest1613356-21kworker/u8:1+events_unbound23:55:250
1377000993323,8cyclictest1704890-21systemd-journal00:35:000
1377000993323,8cyclictest1704890-21systemd-journal00:35:000
1377000993323,8cyclictest1438630-21unixbench_multi20:05:250
1377008993226,4cyclictest1593614-21kworker/u8:0+events_unbound23:17:372
1377004993228,3cyclictest1593614-21kworker/u8:0+events_unbound23:38:341
1377004993225,5cyclictest1704890-21systemd-journal21:32:331
1377000993228,3cyclictest1577824-21kworker/u8:2+events_unbound22:40:270
1377000993227,4cyclictest1398953-21kworker/u8:2+events_unbound20:10:180
1377000993227,3cyclictest1554096-21aten2_r5power_p22:05:080
1377000993226,4cyclictest1708097-21unixbench_multi00:35:260
1377000993226,4cyclictest1708097-21unixbench_multi00:35:260
1377000993224,3cyclictest1488172-21kworker/u8:2+events_unbound20:55:240
1377004993125,4cyclictest1678914-21cpuspeed_turbos00:10:081
1377000993126,4cyclictest1579509-21kworker/u8:4+events_unbound22:55:220
1377000993126,3cyclictest1670435-21kworker/u8:2+events_unbound00:05:270
1377000993126,3cyclictest1640810-21kworker/u8:3+events_unbound23:35:230
1377000993125,4cyclictest1399203-21cpuspeed_turbos19:30:090
1377008993026,2cyclictest1453705-21unixbench_multi20:20:282
1377008993023,5cyclictest1703338-21apt-get00:34:592
1377008993023,5cyclictest1703338-21apt-get00:34:592
1377004993028,1cyclictest1672495-21kworker/u8:4+events_unbound00:00:241
1377000993026,3cyclictest1433530-21kworker/u8:1+events_unbound21:37:340
1377000993025,3cyclictest1230476-21kworker/u8:4+events_unbound19:35:200
1377000993024,4cyclictest1577824-21kworker/u8:2+events_unbound23:25:210
1377000993021,7cyclictest1419539-21fschecks_count19:50:110
1377008992924,3cyclictest1539180-21aten2_r5power_p21:50:082
1377000992926,2cyclictest1663422-21systemd-run23:54:590
1377000992924,3cyclictest1433530-21kworker/u8:1+flush-8:022:30:110
1377008992824,3cyclictest1488172-21kworker/u8:2+events_unbound21:45:102
1377004992824,3cyclictest1648102-21kworker/u8:2-ext4-rsv-conversion23:45:001
1377000992824,3cyclictest1577824-21kworker/u8:2+events_unbound23:00:090
1377000992824,3cyclictest1463931-21kworker/u8:0+events_unbound20:45:280
1377000992822,5cyclictest1518119-21kworker/u8:3+flush-8:021:40:060
1377000992822,4cyclictest1409181-21fschecks_time19:40:110
1377000992818,7cyclictest1468900-21sshd20:35:330
1377008992721,4cyclictest1428947-21sendmail19:59:592
1377004992723,2cyclictest0-21swapper/119:35:091
1377004992722,4cyclictest1433530-21kworker/u8:1+events_unbound20:55:101
1377000992722,4cyclictest1672495-21kworker/u8:4+flush-8:000:20:160
1377000992722,4cyclictest1672495-21kworker/u8:4+flush-8:000:20:150
1377000992721,4cyclictest1683932-21cpuspeed_turbos00:15:090
1377000992721,4cyclictest1394307-21fschecks_count19:25:110
1377008992622,3cyclictest1389388-21fschecks_time19:20:142
1377008992617,7cyclictest1464280-21cp20:35:002
137700899260,7cyclictest1474738-21diskstats20:45:092
1377000992621,4cyclictest1598488-21unixbench_singl22:45:300
1377000992620,4cyclictest1377393-21cpuspeed_turbos19:10:090
1377008992520,3cyclictest1658897-21cpuspeed_turbos23:50:082
1377008992520,3cyclictest1499450-21cpuspeed_turbos21:10:082
1377008992517,6cyclictest1704890-21systemd-journal20:45:002
1377008992420,2cyclictest0-21swapper/200:25:002
1377008992420,2cyclictest0-21swapper/200:24:592
1377008992418,4cyclictest1593614-21kworker/u8:0+events_unbound00:00:002
1377008992417,5cyclictest1433530-21kworker/u8:1+events_unbound20:01:052
1377008992415,7cyclictest1493053-21grep21:00:332
16584422230,7chrt0-21swapper/223:50:012
1377008992318,4cyclictest1613356-21kworker/u8:1+events_unbound23:10:222
1377008992311,10cyclictest1703338-21apt-get00:35:032
1377008992311,10cyclictest1703338-21apt-get00:35:032
1377004992319,3cyclictest1672495-21kworker/u8:4+events_unbound00:15:351
1377008992217,4cyclictest0-21swapper/220:40:002
1377008992116,3cyclictest0-21swapper/219:40:002
1377008992116,3cyclictest0-21swapper/200:05:092
137700899210,5cyclictest1419252-21taskset19:50:082
1377000992115,4cyclictest1376856-21latency_hist19:10:000
14698982200,6sleep30-21swapper/320:40:113
1377008992015,3cyclictest0-21swapper/220:05:272
137700899200,6cyclictest1581126-21kthreadcore22:30:152
13763422204,9sleep20-21swapper/219:05:272
1377008991915,2cyclictest0-21swapper/221:10:002
1377008991914,3cyclictest1552872-21kworker/u8:3+events_unbound22:10:012
1377008991911,6cyclictest1413731-21awk19:45:002
137700899190,5cyclictest1605235-21kthreadcore22:55:162
13726012193,9sleep30-21swapper/319:05:123
137700899182,4cyclictest0-21swapper/223:23:412
137700899182,12cyclictest1567890-21ntpq22:15:192
1377008991814,3cyclictest1548373-21unixbench_singl21:55:262
1377008991814,2cyclictest0-21swapper/223:05:262
1377008991813,4cyclictest0-21swapper/220:25:182
1377008991811,5cyclictest1597936-21ntpq22:45:172
137700899181,11cyclictest1377165-21apt-get19:10:072
1377008991713,2cyclictest1479734-21fschecks_count20:50:102
16994262145,5sleep30-21swapper/300:30:163
16994262145,5sleep30-21swapper/300:30:153
14140082142,8sleep30-21swapper/319:45:053
17042982133,6sleep30-21swapper/300:35:143
17042982133,6sleep30-21swapper/300:35:143
16926182134,5sleep30-21swapper/300:20:253
16926182134,5sleep30-21swapper/300:20:253
16341102131,8sleep30-21swapper/323:25:103
15645022132,7sleep30-21swapper/322:15:103
15437832132,7sleep30-21swapper/321:55:013
15193822133,6sleep30-21swapper/321:30:133
15140752132,7sleep30-21swapper/321:25:063
15095152132,7sleep30-21swapper/321:20:133
14075352131,8sleep30-21swapper/319:35:193
16936402122,6sleep30-21swapper/300:25:063
16936402122,6sleep30-21swapper/300:25:053
16825512122,7sleep30-21swapper/300:10:203
16640172122,6sleep30-21swapper/323:55:113
16496532122,6sleep30-21swapper/323:40:153
16435062122,5sleep30-21swapper/323:35:023
16247032122,6sleep30-21swapper/323:15:153
16089832122,6sleep30-21swapper/323:00:023
16078652122,6sleep30-21swapper/322:55:213
15941822122,6sleep30-21swapper/322:45:053
15896332122,6sleep30-21swapper/322:40:123
15795102122,7sleep30-21swapper/322:30:113
15775482122,6sleep30-21swapper/322:25:193
15735752122,6sleep30-21swapper/322:22:343
15587242122,5sleep30-21swapper/322:10:023
15489692122,6sleep30-21swapper/322:00:013
15440582122,6sleep30-21swapper/321:55:093
15387282122,6sleep30-21swapper/321:48:423
15291742122,6sleep30-21swapper/321:40:033
15237892122,6sleep30-21swapper/321:35:023
15051422122,6sleep30-21swapper/321:15:163
15029152122,6sleep30-21swapper/321:10:173
14947142122,6sleep30-21swapper/321:05:113
14892412122,6sleep30-21swapper/321:00:033
14783102122,6sleep30-21swapper/320:45:223
14581252122,7sleep30-21swapper/320:25:193
14490912122,5sleep30-21swapper/320:20:023
14485372122,6sleep30-21swapper/320:15:273
14233032122,6sleep30-21swapper/319:50:283
13989842123,6sleep30-21swapper/319:30:083
13987092122,5sleep30-21swapper/319:30:003
13888052122,5sleep30-21swapper/319:20:023
13826012122,6sleep30-21swapper/319:15:043
16836832112,6sleep30-21swapper/300:15:063
16774442112,5sleep30-21swapper/300:05:203
16589182112,6sleep30-21swapper/323:50:113
16573252112,5sleep30-21swapper/323:45:173
16387912112,6sleep30-21swapper/323:30:083
16326092112,5sleep30-21swapper/323:20:203
16188202112,5sleep30-21swapper/323:10:023
16140852112,6sleep30-21swapper/323:05:073
15992572112,5sleep30-21swapper/322:50:103
15840002112,5sleep30-21swapper/322:35:013
15543562112,6sleep30-21swapper/322:05:123
14876592112,5sleep30-21swapper/320:55:173
14797022112,5sleep30-21swapper/320:50:103
14632142112,5sleep30-21swapper/320:30:203
14393022112,5sleep30-21swapper/320:10:063
14343442112,5sleep30-21swapper/320:05:053
14331462112,5sleep30-21swapper/320:00:303
14239882112,5sleep30-21swapper/319:55:013
13771342112,5sleep30-21swapper/319:10:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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