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2026-09-20 - 20:02

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 Sun Sep 20, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1765205995119,8cyclictest131rcu_preempt11:30:111
1765205995119,8cyclictest131rcu_preempt11:30:111
1765214994837,6cyclictest1791080-21grep08:20:253
1765201994840,4cyclictest1782789-21munin-plugin-st08:00:000
1765210994740,4cyclictest1827533-21tail10:05:242
1765210994538,4cyclictest1814146-21munin-plugin-st09:30:002
1765205994435,5cyclictest0-21swapper/110:30:001
1765201994434,6cyclictest1781074-21cron07:55:010
176521499433,9cyclictest1807988-21/usr/sbin/munin09:10:193
176521499433,4cyclictest1840392-21apt-get10:45:133
1765214994233,6cyclictest1865942-21munin-run11:59:593
176521499421,9cyclictest1771896-21/usr/sbin/munin07:25:263
176521499421,12cyclictest1842624-21grep10:50:203
176521499421,11cyclictest1849020-21df11:10:153
1765210994230,8cyclictest1834627-21grep10:25:252
1765205994232,7cyclictest1809012-21cron09:15:001
1765201994234,4cyclictest0-21swapper/008:05:000
1765214994131,7cyclictest1853792-21sh11:25:003
1765214994128,9cyclictest391ktimers/311:15:103
176521499412,34cyclictest1810711-21cron09:20:003
176521499411,9cyclictest1878258-21/usr/sbin/munin12:35:163
176521499411,9cyclictest1857885-21/usr/sbin/munin11:35:183
176521499411,9cyclictest1857885-21/usr/sbin/munin11:35:183
176521499411,9cyclictest1784846-21df_inode08:05:153
176521499411,8cyclictest1861164-21/usr/sbin/munin11:45:153
176521499411,8cyclictest1861164-21/usr/sbin/munin11:45:153
176521499411,8cyclictest1835376-21/usr/sbin/munin10:30:163
176521499411,7cyclictest1815043-21/usr/sbin/munin09:30:233
176521499411,10cyclictest1799848-21grep08:45:263
176521499411,10cyclictest1769390-21apt-get07:20:133
1765201994135,4cyclictest1796641-21idleruntime-cro08:40:010
176521499403,6cyclictest1789426-21users08:15:273
176521499403,32cyclictest1847326-21/usr/sbin/munin11:05:163
176521499401,9cyclictest1856343-21/usr/sbin/munin11:30:233
176521499401,9cyclictest1856343-21/usr/sbin/munin11:30:233
176521499401,8cyclictest1877487-21sed12:30:263
176521499401,8cyclictest1817394-21sshd09:38:253
176521499401,8cyclictest1796413-21sshd08:37:243
176521499401,6cyclictest1805945-21df09:05:153
176521499401,5cyclictest1830807-21/usr/sbin/munin10:15:253
176521499401,4cyclictest1804266-21/usr/sbin/munin09:00:163
176521499401,35cyclictest438-21cron07:40:013
176521499401,10cyclictest1859463-21if_eth011:40:173
1765210994032,5cyclictest1786211-21munin-plugin-st08:10:002
176521499391,9cyclictest1866193-21apt-get12:00:123
176521499391,8cyclictest1818108-21/usr/sbin/munin09:40:143
176521499391,8cyclictest1778247-21/usr/sbin/munin07:45:173
176521499391,7cyclictest1826972-21/usr/sbin/munin10:05:193
176521499391,7cyclictest1811059-21/usr/sbin/munin09:20:133
176521499391,6cyclictest1844731-21/usr/sbin/munin10:55:253
176521499391,5cyclictest1802203-21/usr/sbin/munin08:55:273
176521499391,4cyclictest1870443-21/usr/sbin/munin12:10:283
176521499391,11cyclictest1837535-21ntp_states10:35:223
176521499391,10cyclictest1854601-21ntp_states11:25:223
176521499391,10cyclictest1833838-21/usr/sbin/munin10:25:173
1765210993932,5cyclictest1845258-21auditctl11:00:002
1765210993928,7cyclictest0-21swapper/210:15:272
1765205993931,5cyclictest1870889-21kworker/u8:2+events_unbound12:20:121
1765201993930,6cyclictest0-21swapper/009:00:010
1765201993929,6cyclictest1766365-21grep07:10:260
1765201993929,6cyclictest1766365-21grep07:10:260
1765201993929,6cyclictest0-21swapper/011:45:010
1765201993928,8cyclictest1821176-21idleruntime-cro09:50:000
176521499389,24cyclictest1797929-21unixbench_singl08:40:283
176521499382,9cyclictest1873704-21/usr/sbin/munin12:20:213
176521499382,4cyclictest1868336-21/usr/sbin/munin12:05:193
176521499382,33cyclictest1813009-21irqstats09:25:193
176521499381,9cyclictest1863064-21if_eth011:50:183
176521499381,8cyclictest1845507-21/usr/sbin/munin11:00:203
176521499381,8cyclictest1765670-21/usr/sbin/munin07:10:193
176521499381,8cyclictest1765670-21/usr/sbin/munin07:10:183
176521499381,6cyclictest1824824-21/usr/sbin/munin10:00:213
176521499381,6cyclictest1821535-21/usr/sbin/munin09:50:153
176521499381,4cyclictest1839027-21irqstats10:40:183
176521499381,4cyclictest1783137-21df08:00:143
176521499381,4cyclictest1779934-21/usr/sbin/munin07:50:183
176521499381,3cyclictest0-21swapper/308:25:123
176521499381,11cyclictest1800950-21meminfo08:50:193
176521499381,10cyclictest1793588-21df_inode08:30:173
1765205993829,6cyclictest1791090-21grep08:20:241
1765205993826,7cyclictest1862068-21grep11:45:251
1765205993826,7cyclictest1862068-21grep11:45:251
1765201993831,4cyclictest1872782-21sendmail12:20:000
1765201993831,4cyclictest0-21swapper/009:10:010
1765201993830,4cyclictest0-21swapper/008:35:000
176521499373,27cyclictest0-21swapper/310:10:163
1765214993729,5cyclictest1777203-21unixbench_multi07:40:243
1765214993727,7cyclictest1772931-21fschecks_count07:30:163
176521499372,3cyclictest1820271-21ntp_states09:45:223
176521499371,9cyclictest1786432-21/usr/sbin/munin08:10:173
176521499371,8cyclictest1872899-21cat12:20:023
176521499371,7cyclictest1832082-21grep10:20:163
176521499371,5cyclictest1823225-21diskstats09:55:143
176521499371,4cyclictest1781434-21/usr/sbin/munin07:55:163
176521499371,11cyclictest1769171-21sendmail-msp07:20:003
176521499371,11cyclictest1769171-21sendmail-msp07:20:003
176521499371,10cyclictest1875078-21sed12:25:183
1765210993728,6cyclictest1872759-21cron12:20:012
1765210993728,5cyclictest0-21swapper/211:35:012
1765210993728,5cyclictest0-21swapper/211:35:002
176521099371,3cyclictest131rcu_preempt10:30:132
1765201993728,6cyclictest1834574-21unixbench_multi10:25:260
1765201993725,8cyclictest164-21systemd-journal10:49:530
1765201993724,7cyclictest0-21swapper/011:15:230
1765210993628,4cyclictest0-21swapper/209:15:002
1765205993624,8cyclictest1812002-21grep09:20:251
1765201993629,5cyclictest1876162-21kworker/u8:1+events_unbound12:30:130
1765201993629,4cyclictest1858919-21munin-plugin-st11:39:590
1765201993629,4cyclictest1858919-21munin-plugin-st11:39:590
1765201993626,6cyclictest0-21swapper/011:10:260
1765210993528,5cyclictest1853688-21kworker/u8:2+events_unbound11:55:062
1765210993528,4cyclictest0-21swapper/209:00:022
1765205993525,7cyclictest231ktimers/109:40:131
1765205993525,6cyclictest1865475-21grep11:55:261
1765205993525,6cyclictest0-21swapper/111:45:011
1765201993527,5cyclictest1777194-21unixbench_multi07:40:240
1765210993426,6cyclictest1791372-21kworker/u8:1+events_unbound08:24:282
1765210993425,5cyclictest0-21swapper/207:50:252
1765205993426,5cyclictest1869368-21munin-plugin-st12:10:001
1765205993426,4cyclictest0-21swapper/109:50:001
1765205993425,5cyclictest0-21swapper/112:00:161
1765205993424,7cyclictest1787480-21grep08:10:271
1765201993425,5cyclictest0-21swapper/009:25:000
1765201993424,6cyclictest0-21swapper/009:15:250
176520199341,5cyclictest131rcu_preempt09:25:140
1765205993325,4cyclictest0-21swapper/111:35:031
1765205993325,4cyclictest0-21swapper/111:35:021
1765205993325,4cyclictest0-21swapper/108:20:001
1765205993324,4cyclictest0-21swapper/112:40:001
1765201993324,5cyclictest0-21swapper/009:10:240
1765201993323,6cyclictest1787479-21grep08:10:260
1765201993323,6cyclictest0-21swapper/012:05:010
1765201993322,6cyclictest0-21swapper/011:45:260
1765201993322,6cyclictest0-21swapper/011:45:250
1765210993226,3cyclictest1871062-21cron12:15:002
1765210993224,4cyclictest0-21swapper/211:15:012
1765210993223,6cyclictest1874483-21auditctl12:25:012
1765210993222,5cyclictest0-21swapper/210:05:002
1765205993226,4cyclictest1834672-21kworker/u8:2+events_unbound10:38:401
1765205993224,5cyclictest1843160-21unixbench_singl10:50:261
1765205993224,4cyclictest0-21swapper/112:30:181
1765205993222,6cyclictest1805975-21grep09:05:161
1765205993220,8cyclictest1851653-21grep11:15:241
1765205993220,7cyclictest0-21swapper/112:15:241
1765201993225,3cyclictest0-21swapper/012:35:150
1765201993225,3cyclictest0-21swapper/008:10:000
1765201993224,6cyclictest1831271-21kworker/u8:1+events_unbound10:24:490
1765201993221,7cyclictest0-21swapper/007:25:270
1765201993221,6cyclictest0-21swapper/010:20:000
1765201993220,7cyclictest1799869-21grep08:45:250
176521099316,6cyclictest18668762grep12:00:222
1765210993122,6cyclictest0-21swapper/212:35:162
1765210993121,6cyclictest0-21swapper/207:25:262
1765205993125,3cyclictest0-21swapper/108:00:001
1765205993123,4cyclictest0-21swapper/111:50:051
1765205993123,4cyclictest0-21swapper/111:05:161
1765201993121,7cyclictest0-21swapper/012:10:190
1765210993024,3cyclictest0-21swapper/209:35:272
1765210993023,4cyclictest0-21swapper/208:50:272
1765210993022,5cyclictest0-21swapper/209:05:002
1765210993017,4cyclictest1822518-21kworker/u8:1+events_unbound09:51:012
1765205993021,6cyclictest0-21swapper/108:35:171
1765205993020,7cyclictest1815421-21grep09:30:251
1765205993020,6cyclictest0-21swapper/110:15:001
1765201993024,3cyclictest1843181-21kworker/u8:1+events_unbound11:25:020
1765201993022,5cyclictest151rcuc/009:35:150
1765201993022,4cyclictest0-21swapper/008:25:260
1765201993021,5cyclictest0-21swapper/011:59:590
1765210992923,3cyclictest0-21swapper/208:40:182
1765210992921,6cyclictest1773788-21unixbench_multi07:30:272
1765210992920,6cyclictest1807302-21sh09:10:002
1765210992918,6cyclictest0-21swapper/211:00:252
1765205992921,6cyclictest1775714-21kworker/u8:1+events_unbound07:40:141
1765205992921,4cyclictest0-21swapper/108:50:261
1765205992918,7cyclictest1874902-21tune2fs12:25:171
1765205992917,8cyclictest1870634-21grep12:10:271
1765201992919,6cyclictest0-21swapper/009:30:260
1765210992819,6cyclictest0-21swapper/212:25:252
1765210992819,6cyclictest0-21swapper/211:20:232
1765210992818,6cyclictest0-21swapper/211:40:252
1765210992818,6cyclictest0-21swapper/209:50:012
1765205992821,5cyclictest1769072-21kworker/u8:0+events_unbound07:49:171
1765205992820,5cyclictest231ktimers/108:43:411
1765201992821,4cyclictest0-21swapper/007:30:260
1765201992820,5cyclictest0-21swapper/011:00:010
1765201992820,4cyclictest0-21swapper/010:40:250
1765201992819,6cyclictest1775525-21grep07:35:270
1765201992818,7cyclictest1789394-21grep08:15:270
1765210992721,3cyclictest0-21swapper/208:35:252
1765210992720,4cyclictest0-21swapper/212:30:262
1765210992720,4cyclictest0-21swapper/211:50:272
1765210992719,4cyclictest0-21swapper/209:15:262
1765210992713,10cyclictest311ktimers/209:55:112
1765205992720,5cyclictest1820149-21kworker/u8:0+events_unbound09:59:471
1765205992720,3cyclictest0-21swapper/110:45:251
1765205992719,5cyclictest1785805-21unixbench_singl08:05:271
1765205992719,4cyclictest0-21swapper/107:20:191
1765201992721,3cyclictest0-21swapper/012:25:250
1765210992620,3cyclictest0-21swapper/209:30:242
1765210992617,6cyclictest0-21swapper/211:50:002
1765210992617,6cyclictest0-21swapper/211:49:592
1765210992617,6cyclictest0-21swapper/207:55:272
1765210992616,7cyclictest1858922-21tr11:40:002
1765210992616,7cyclictest1858922-21tr11:39:592
1765210992616,6cyclictest0-21swapper/208:25:272
1765205992619,5cyclictest1791372-21kworker/u8:1+events_unbound08:28:411
1765205992617,6cyclictest0-21swapper/107:15:261
1765205992617,6cyclictest0-21swapper/107:15:261
1765205992617,5cyclictest0-21swapper/109:25:191
1765205992616,6cyclictest0-21swapper/108:55:271
176520599261,5cyclictest131rcu_preempt10:20:131
1765205992615,9cyclictest1765195-21cyclictest09:50:131
1765201992621,3cyclictest13550irq/42-30be0000.ethernet11:32:570
1765201992621,3cyclictest13550irq/42-30be0000.ethernet11:32:560
1765201992620,4cyclictest0-21swapper/007:45:120
1765201992619,4cyclictest0-21swapper/008:50:260
1765201992618,5cyclictest1804438-21if_eth009:00:190
1765201992618,4cyclictest0-21swapper/011:20:230
1765201992617,5cyclictest0-21swapper/010:10:250
1765201992617,5cyclictest0-21swapper/008:20:240
1765201992615,7cyclictest1843157-21grep10:50:250
1765201992613,9cyclictest204-21dbus-daemon07:24:130
1765210992518,5cyclictest0-21swapper/211:25:112
1765210992518,3cyclictest0-21swapper/210:55:002
1765210992516,6cyclictest0-21swapper/207:45:252
1765210992515,6cyclictest0-21swapper/210:15:012
176520599258,10cyclictest24-21ksoftirqd/107:10:211
176520599258,10cyclictest24-21ksoftirqd/107:10:211
1765205992521,2cyclictest0-21swapper/107:30:131
1765205992519,4cyclictest231ktimers/111:00:121
1765205992519,4cyclictest1794905-21kworker/u8:1+events_unbound09:02:471
1765205992518,5cyclictest1853688-21kworker/u8:2+events_unbound11:27:321
1765205992518,5cyclictest1834672-21kworker/u8:2+events_unbound10:44:051
1765205992518,5cyclictest1787704-21kworker/u8:0+events_unbound08:33:011
1765205992516,6cyclictest1771627-21ntpq07:25:211
1765205992516,5cyclictest0-21swapper/108:00:161
176520599251,13cyclictest0-21swapper/107:50:161
176520199259,6cyclictest11-21ksoftirqd/011:00:220
1765201992515,7cyclictest438-21cron11:10:000
1765210992418,4cyclictest1766669-21kworker/u8:2+events_unbound07:14:132
1765210992418,4cyclictest1766669-21kworker/u8:2+events_unbound07:14:132
1765210992418,3cyclictest0-21swapper/210:35:272
1765210992414,7cyclictest1767278-21ntp_states07:15:032
1765210992414,7cyclictest1767278-21ntp_states07:15:032
1765210992414,7cyclictest0-21swapper/212:05:242
1765210992414,6cyclictest0-21swapper/210:40:262
1765210992413,8cyclictest1776484-21cat07:40:162
1765205992417,4cyclictest1844832-21grep10:55:251
1765205992417,4cyclictest0-21swapper/107:35:251
176520199249,4cyclictest131rcu_preempt10:02:000
1765201992418,3cyclictest0-21swapper/012:20:240
1765201992418,3cyclictest0-21swapper/010:40:000
1765201992416,5cyclictest121ktimers/009:55:150
1765201992416,4cyclictest1827996-21sh10:10:000
176520199241,20cyclictest1818015-21cpu09:40:140
1765210992317,3cyclictest0-21swapper/210:45:252
1765210992317,3cyclictest0-21swapper/209:40:232
1765210992314,6cyclictest0-21swapper/208:15:172
1765210992313,7cyclictest204-21dbus-daemon10:24:482
1765210992313,7cyclictest1794335-21cat08:30:272
1765210992312,8cyclictest0-21swapper/208:10:232
176520599238,5cyclictest131rcu_preempt10:04:331
176520599236,10cyclictest24-21ksoftirqd/108:45:251
1765205992316,5cyclictest1831271-21kworker/u8:1+events_unbound10:34:501
1765205992315,4cyclictest0-21swapper/110:05:151
1765205992313,7cyclictest0-21swapper/109:35:251
1765201992317,3cyclictest0-21swapper/010:30:220
1765201992317,3cyclictest0-21swapper/007:15:040
1765201992317,3cyclictest0-21swapper/007:15:040
1765201992315,5cyclictest0-21swapper/008:40:190
176520199231,18cyclictest1863780-21grep11:50:260
1765210992216,3cyclictest0-21swapper/211:05:202
1765210992216,3cyclictest0-21swapper/208:45:112
1765210992216,3cyclictest0-21swapper/208:00:132
1765210992214,5cyclictest0-21swapper/211:20:012
1765210992211,4cyclictest1770874-21idleruntime-cro07:25:002
176520599228,6cyclictest24-21ksoftirqd/109:15:211
176520599226,9cyclictest24-21ksoftirqd/111:10:161
176520199221,3cyclictest0-21swapper/012:06:420
176520199221,3cyclictest0-21swapper/009:50:550
1765210992115,3cyclictest1775122-21processes07:35:252
1765210992014,4cyclictest0-21swapper/209:20:152
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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