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2026-04-16 - 06:03

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #5

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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  Phytec
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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: performance
Compare latency of primary with shadow system
Characteristics of all highest latencies:
System rackbslot5s.osadl.org (updated Thu Apr 16, 2026 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1723332996053,5cyclictest1777529-21kworker/u8:0+events_unbound22:15:203
1723332995344,5cyclictest1815293-21munin-plugin-st23:35:003
1723329995043,4cyclictest1827235-21munin-plugin-st00:10:002
1723329995043,4cyclictest1827235-21munin-plugin-st00:09:592
1723332994525,6cyclictest1702913-21kworker/u8:1+events_unbound21:15:123
1723326994434,5cyclictest1790224-21seq22:20:181
1723332994335,5cyclictest1775850-21sh21:40:003
1723332994333,6cyclictest1795853-21grep22:35:243
1723321994321,18cyclictest13550irq/42-30be0000.ethernet20:55:130
1723321994235,4cyclictest1801423-21cron22:55:000
1723332994130,7cyclictest1744305-21sh20:10:013
1723326994132,6cyclictest1805484-21fschecks_time23:05:161
1723326994130,7cyclictest0-21swapper/123:00:001
1723332994029,8cyclictest1794609-21auditctl22:35:003
1723326994031,6cyclictest1828508-21unixbench_singl00:10:231
1723326994030,5cyclictest0-21swapper/119:24:551
1723321994029,8cyclictest1837673-21cat00:40:010
1723332993933,4cyclictest1830268-21kworker/u8:0+events_unbound00:38:313
1723332993928,7cyclictest0-21swapper/322:30:003
1723321993930,6cyclictest1834050-21cron00:30:010
1723332993831,5cyclictest1702913-21kworker/u8:1+events_unbound20:10:053
1723332993830,4cyclictest1761793-21sendmail21:00:013
1723329993832,3cyclictest0-21swapper/219:40:012
1723329993832,3cyclictest0-21swapper/219:40:002
1723326993830,4cyclictest0-21swapper/121:20:011
1723326993828,7cyclictest1734081-21cron19:40:011
1723326993828,7cyclictest1734081-21cron19:40:001
1723332993726,5cyclictest0-21swapper/320:20:023
1723332993721,5cyclictest1796086-21kworker/u8:0+events_unbound23:09:193
1723329993730,4cyclictest0-21swapper/223:20:012
1723329993728,6cyclictest311ktimers/222:15:142
1723326993729,4cyclictest0-21swapper/123:40:001
1723326993725,7cyclictest0-21swapper/122:25:241
1723326993725,7cyclictest0-21swapper/100:09:591
1723326993725,7cyclictest0-21swapper/100:09:591
1723326993717,6cyclictest1732951-21kworker/u8:0+events_unbound19:47:321
1723332993628,4cyclictest0-21swapper/319:45:173
1723332993623,9cyclictest1730214-21grep19:25:263
1723332993618,5cyclictest1702913-21kworker/u8:1+events_unbound20:35:203
1723329993626,7cyclictest1728529-21unixbench_multi19:20:242
1723329993625,7cyclictest0-21swapper/222:45:252
1723326993625,7cyclictest0-21swapper/122:35:241
1723321993626,4cyclictest0-21swapper/023:25:000
1723332993526,4cyclictest0-21swapper/322:50:133
1723329993527,5cyclictest1796305-21cron22:40:002
1723329993527,4cyclictest0-21swapper/220:40:242
1723329993525,6cyclictest0-21swapper/221:05:262
1723329993525,6cyclictest0-21swapper/220:30:262
1723329993525,6cyclictest0-21swapper/220:10:252
1723326993526,4cyclictest0-21swapper/120:25:161
1723326993525,6cyclictest0-21swapper/120:00:001
1723326993525,6cyclictest0-21swapper/119:30:001
1723326993523,7cyclictest0-21swapper/100:35:251
1723321993525,6cyclictest0-21swapper/020:05:230
1723321993524,6cyclictest0-21swapper/000:05:000
1723321993524,6cyclictest0-21swapper/000:04:590
1723332993425,6cyclictest1830644-21sendmail00:19:593
1723332993425,4cyclictest0-21swapper/300:33:313
1723332993424,5cyclictest0-21swapper/321:10:243
1723332993423,7cyclictest1765403-21sh21:10:013
1723329993424,6cyclictest0-21swapper/200:40:012
1723326993424,6cyclictest0-21swapper/123:50:241
1723326993422,9cyclictest231ktimers/123:15:121
1723321993425,5cyclictest0-21swapper/022:40:010
1723321993424,6cyclictest0-21swapper/022:45:010
1723332993326,5cyclictest1777529-21kworker/u8:0+events_unbound22:11:423
1723332993326,5cyclictest1750808-21kworker/u8:2+events_unbound20:45:163
1723332993323,7cyclictest1778871-21grep21:45:253
1723332993322,7cyclictest1823383-21grep23:55:243
1723329993327,3cyclictest1740901-21sendmail20:00:012
1723329993327,3cyclictest1730680-21kthreadd19:30:002
1723329993327,3cyclictest0-21swapper/223:10:142
1723329993326,5cyclictest1724575-21kworker/u8:0+events_unbound19:14:542
1723329993323,7cyclictest1825118-21grep00:00:232
1723329993323,7cyclictest1825118-21grep00:00:232
1723329993321,7cyclictest0-21swapper/221:10:252
1723326993323,6cyclictest1767316-21cron21:15:001
1723326993323,6cyclictest0-21swapper/100:00:241
1723326993323,6cyclictest0-21swapper/100:00:231
1723321993325,4cyclictest0-21swapper/020:10:040
1723321993324,3cyclictest0-21swapper/020:00:000
1723332993217,5cyclictest1777529-21kworker/u8:0+events_unbound22:07:273
1723329993225,4cyclictest1830637-21munin-run00:19:592
1723326993224,4cyclictest0-21swapper/122:10:151
1723321993222,6cyclictest0-21swapper/019:30:250
1723332993125,4cyclictest1732951-21kworker/u8:0+events_unbound19:40:003
1723332993125,4cyclictest1732951-21kworker/u8:0+events_unbound19:40:003
1723332993121,5cyclictest0-21swapper/322:45:263
1723329993123,4cyclictest0-21swapper/220:00:242
1723329993122,5cyclictest0-21swapper/220:25:012
1723329993121,6cyclictest0-21swapper/219:15:242
1723329993121,6cyclictest0-21swapper/200:35:012
1723326993125,4cyclictest1756654-21runrttasks20:45:011
1723326993123,5cyclictest1702913-21kworker/u8:1+events_unbound21:30:111
1723326993123,5cyclictest1702913-21kworker/u8:1+events_unbound21:30:111
1723326993121,6cyclictest1772038-21grep21:25:251
1723326993121,6cyclictest0-21swapper/120:35:011
1723326993121,6cyclictest0-21swapper/120:10:021
1723321993124,4cyclictest1816984-21apt23:40:010
1723321993122,5cyclictest0-21swapper/021:35:190
1723321993121,6cyclictest0-21swapper/022:05:250
1723321993121,6cyclictest0-21swapper/019:50:240
1723321993120,6cyclictest0-21swapper/019:50:010
1723332993022,4cyclictest0-21swapper/300:25:163
1723332993018,6cyclictest0-21swapper/320:25:053
1723332993017,7cyclictest0-21swapper/319:15:243
172333299301,5cyclictest0-21swapper/320:50:113
1723329993023,4cyclictest0-21swapper/222:00:242
1723329993021,6cyclictest0-21swapper/200:25:002
1723329993020,7cyclictest0-21swapper/222:30:002
1723329993020,6cyclictest0-21swapper/219:30:252
1723329993019,6cyclictest0-21swapper/219:50:252
1723329993018,7cyclictest0-21swapper/221:45:242
1723326993024,4cyclictest1823504-21kworker/u8:1+events_unbound00:28:301
1723326993023,4cyclictest1761692-21kworker/u8:3+events_unbound21:00:111
1723326993022,4cyclictest0-21swapper/122:45:251
1723326993022,4cyclictest0-21swapper/120:15:161
1723326993020,6cyclictest0-21swapper/119:15:001
1723321993023,3cyclictest0-21swapper/019:25:270
1723321993022,5cyclictest1751133-21idleruntime-cro20:30:000
1723321993020,6cyclictest0-21swapper/022:00:000
172333299293,4cyclictest131rcu_preempt20:00:123
1723332992923,4cyclictest1785771-21kworker/u8:1+events_unbound22:43:513
1723332992920,6cyclictest0-21swapper/323:35:243
1723332992919,7cyclictest1772898-21fschecks_time21:30:163
1723332992919,7cyclictest1772898-21fschecks_time21:30:163
1723332992918,7cyclictest0-21swapper/320:20:253
172333299291,7cyclictest0-21swapper/322:00:113
1723332992914,10cyclictest1-21systemd23:53:063
1723332992913,6cyclictest1724575-21kworker/u8:0+events_unbound19:13:323
1723329992922,3cyclictest0-21swapper/223:55:242
1723329992921,4cyclictest0-21swapper/223:30:252
1723329992920,6cyclictest0-21swapper/219:45:252
1723326992921,4cyclictest0-21swapper/119:15:041
1723326992921,3cyclictest0-21swapper/121:10:001
1723326992920,6cyclictest0-21swapper/121:55:001
1723326992920,6cyclictest0-21swapper/121:50:001
1723326992919,7cyclictest1812254-21fschecks_count23:25:151
1723321992921,5cyclictest1765407-21cron21:10:000
1723321992919,7cyclictest1783103-21fschecks_time22:00:150
1723321992919,5cyclictest0-21swapper/023:15:010
1723332992820,5cyclictest1763652-21kworker/u8:2+events_unbound21:25:223
1723332992816,9cyclictest629-21snmpd00:21:063
1723332992810,10cyclictest131rcu_preempt22:20:243
1723329992821,4cyclictest1782676-21munin-plugin-st22:00:012
1723329992821,3cyclictest0-21swapper/222:10:002
1723329992820,5cyclictest0-21swapper/222:55:012
1723329992819,5cyclictest0-21swapper/220:10:012
1723326992821,3cyclictest0-21swapper/122:00:001
1723326992820,5cyclictest0-21swapper/121:20:171
1723326992820,4cyclictest0-21swapper/120:55:171
1723326992819,7cyclictest231ktimers/120:10:121
1723321992820,6cyclictest0-21swapper/022:20:200
1723321992820,5cyclictest0-21swapper/023:00:270
1723321992819,6cyclictest0-21swapper/020:50:000
1723321992817,9cyclictest1734324-21/usr/sbin/munin19:40:160
1723321992817,9cyclictest1734324-21/usr/sbin/munin19:40:150
1723321992817,7cyclictest0-21swapper/023:15:240
172332199281,2cyclictest0-21swapper/022:25:100
1723332992720,3cyclictest0-21swapper/321:50:183
1723332992719,4cyclictest0-21swapper/320:35:003
1723332992716,4cyclictest131rcu_preempt21:44:283
1723332992715,9cyclictest1827610-21cut00:10:143
1723332992715,7cyclictest0-21swapper/323:45:243
1723332992712,6cyclictest1796086-21kworker/u8:0+events_unbound22:56:303
1723329992721,3cyclictest0-21swapper/220:15:222
1723329992716,8cyclictest1818238-21grep23:40:232
1723329992716,8cyclictest1803131-21apt-get23:00:012
1723326992721,4cyclictest1747563-21kworker/u8:3+events_unbound20:20:061
1723326992719,4cyclictest0-21swapper/121:40:011
1723326992717,6cyclictest0-21swapper/122:15:251
1723321992720,4cyclictest1769025-21sh21:20:000
1723321992720,4cyclictest0-21swapper/023:30:260
1723321992719,4cyclictest0-21swapper/000:00:000
1723321992718,5cyclictest0-21swapper/022:55:250
1723321992718,5cyclictest0-21swapper/000:25:010
1723321992717,6cyclictest0-21swapper/020:40:240
1723321992716,9cyclictest121ktimers/022:30:120
1723321992715,8cyclictest1813591-21ls23:30:000
172333299261,8cyclictest18073302awk23:10:173
1723332992618,6cyclictest1823504-21kworker/u8:1+events_unbound00:08:263
1723332992618,6cyclictest1823504-21kworker/u8:1+events_unbound00:08:253
1723332992617,5cyclictest1825093-21head00:00:243
1723332992617,5cyclictest1825093-21head00:00:233
1723332992615,8cyclictest1731474-21ntp_states19:30:223
1723329992619,5cyclictest1750808-21kworker/u8:2+events_unbound20:48:422
1723329992618,4cyclictest0-21swapper/222:40:142
1723329992617,6cyclictest1749874-21tune2fs20:25:172
1723329992616,6cyclictest0-21swapper/223:20:252
1723326992620,3cyclictest0-21swapper/122:40:161
1723326992619,4cyclictest0-21swapper/120:40:001
1723326992619,3cyclictest0-21swapper/123:15:001
1723326992619,3cyclictest0-21swapper/120:05:021
1723326992617,5cyclictest0-21swapper/123:40:231
1723326992616,5cyclictest0-21swapper/100:20:261
1723326992614,8cyclictest1794162-21grep22:30:261
172332199265,4cyclictest131rcu_preempt21:30:130
172332199265,4cyclictest131rcu_preempt21:30:130
1723321992618,5cyclictest0-21swapper/020:15:250
1723321992618,5cyclictest0-21swapper/019:15:240
1723321992617,6cyclictest0-21swapper/023:40:250
1723321992617,5cyclictest0-21swapper/023:50:170
1723321992617,4cyclictest0-21swapper/020:50:090
1723321992616,6cyclictest0-21swapper/000:10:230
172333299254,3cyclictest131rcu_preempt23:05:003
1723332992519,4cyclictest1804886-21kworker/u8:2+events_unbound23:24:483
1723332992518,5cyclictest1799468-21kworker/u8:3+events_unbound23:29:403
1723332992518,5cyclictest1702913-21kworker/u8:1+events_unbound19:23:133
1723332992515,6cyclictest1770746-21auditctl21:25:003
172332999252,12cyclictest1804376-21grep23:00:262
1723329992517,5cyclictest1775889-21cat21:40:002
1723326992519,3cyclictest0-21swapper/123:00:191
1723326992514,7cyclictest1830205-21grep00:15:241
1723321992520,3cyclictest1776256-21fschecks_count21:40:150
1723321992517,6cyclictest1804886-21kworker/u8:2+events_unbound23:05:300
1723321992517,5cyclictest0-21swapper/021:10:240
172332199251,4cyclictest1829608-21meminfo00:15:170
172332199251,11cyclictest1732718-21/usr/sbin/munin19:35:140
172332199251,11cyclictest1732718-21/usr/sbin/munin19:35:140
172333299245,9cyclictest1810171-21munin-run23:20:003
1723332992418,4cyclictest1732951-21kworker/u8:0+events_unbound19:50:033
1723332992418,3cyclictest391ktimers/319:55:113
1723332992418,3cyclictest0-21swapper/321:55:213
1723329992417,5cyclictest1796086-21kworker/u8:0+events_unbound23:50:132
1723329992417,4cyclictest0-21swapper/200:10:152
1723329992417,3cyclictest0-21swapper/220:50:152
1723329992416,5cyclictest0-21swapper/221:50:142
1723329992416,4cyclictest0-21swapper/222:20:252
1723329992414,6cyclictest0-21swapper/219:40:242
1723329992414,6cyclictest0-21swapper/219:40:242
172332999241,12cyclictest0-21swapper/221:30:232
172332999241,12cyclictest0-21swapper/221:30:232
172332999241,11cyclictest0-21swapper/222:30:162
1723326992418,4cyclictest1796086-21kworker/u8:0+events_unbound23:50:001
1723326992417,5cyclictest1777529-21kworker/u8:0+events_unbound22:05:191
1723326992416,5cyclictest0-21swapper/119:45:011
1723326992416,5cyclictest0-21swapper/119:45:001
172332199243,17cyclictest1787789-21audit_send_reply22:15:010
1723321992417,4cyclictest0-21swapper/022:45:250
1723321992417,3cyclictest0-21swapper/000:31:240
1723321992416,4cyclictest1825972-21fschecks_time00:05:140
1723321992416,4cyclictest1825972-21fschecks_time00:05:140
1723321992415,6cyclictest1726032-1kworker/0:2H+mmc_complete20:40:010
172332199241,3cyclictest1763710-21latency_hist21:05:010
172332199241,20cyclictest0-21swapper/021:23:340
172332199241,19cyclictest0-21swapper/020:31:370
172332199241,19cyclictest0-21swapper/020:03:520
172332199241,19cyclictest0-21swapper/019:22:210
172333299230,12cyclictest0-21swapper/323:43:013
1723329992317,3cyclictest0-21swapper/223:25:232
1723329992317,3cyclictest0-21swapper/223:05:152
1723329992317,3cyclictest0-21swapper/222:10:242
1723329992317,3cyclictest0-21swapper/220:35:172
1723329992316,4cyclictest1777529-21kworker/u8:0+events_unbound21:44:412
1723329992313,7cyclictest1762000-21wc21:00:012
172332999231,12cyclictest0-21swapper/221:25:222
1723326992317,3cyclictest0-21swapper/121:40:141
1723326992317,3cyclictest0-21swapper/119:50:161
1723321992316,3cyclictest0-21swapper/021:29:300
1723321992315,4cyclictest1723636-21seq19:10:150
172332199231,20cyclictest0-21swapper/022:15:120
172333299222,14cyclictest1763695-21cron21:05:013
1723332992215,4cyclictest0-21swapper/320:40:163
1723329992215,5cyclictest1799468-21kworker/u8:3+events_unbound23:39:272
1723326992217,3cyclictest1799468-21kworker/u8:3-ext4-rsv-conversion23:30:021
1723326992215,5cyclictest231ktimers/120:45:191
1723326992215,5cyclictest1832012-21kworker/u8:2+events_unbound00:33:301
1723326992214,4cyclictest0-21swapper/122:00:251
172332699221,18cyclictest231ktimers/119:30:231
1723321992216,2cyclictest0-21swapper/020:23:060
172332199221,3cyclictest0-21swapper/021:47:100
1723321992212,6cyclictest0-21swapper/023:45:230
172332199221,19cyclictest0-21swapper/021:50:070
172333299211,11cyclictest1734540-21grep19:40:153
172333299211,11cyclictest1734540-21grep19:40:153
1723329992115,3cyclictest1833103-21nfs4_client00:25:182
1723329992114,5cyclictest311ktimers/223:45:132
1723326992014,3cyclictest0-21swapper/120:50:161
1723326992010,7cyclictest1799960-21apt-get22:50:091
1723329991911,5cyclictest311ktimers/221:20:162
172332699199,7cyclictest1823210-21/usr/sbin/munin23:55:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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