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2026-06-11 - 09:48

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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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Click here to display the system's profile data or here to proceed to next system.
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.
Unexpectedly long latencies may be caused by SMIs
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 the 100 highest latencies:
System rack0slot4s.osadl.org (updated Thu Jun 11, 2026 00:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17988212423383,33sleep30-21swapper/319:09:039
17986732373329,14sleep150-21swapper/1519:07:077
17988062368329,13sleep70-21swapper/719:08:5113
17986612368362,4sleep40-21swapper/419:06:5510
17985472368329,13sleep20-21swapper/219:05:338
17987892366328,14sleep130-21swapper/1319:08:415
17986472366323,14sleep140-21swapper/1419:06:496
17988292363325,30sleep110-21swapper/1119:09:113
17986632361341,13sleep50-21swapper/519:06:5711
17988942354332,14sleep80-21swapper/819:09:5714
17988892354334,13sleep60-21swapper/619:09:5512
17985872353346,5sleep90-21swapper/919:05:5615
17988122351331,13sleep120-21swapper/1219:08:554
17987862351331,13sleep100-21swapper/1019:08:382
17987132345325,13sleep00-21swapper/019:07:400
17986322341322,12sleep10-21swapper/119:06:361
1799395994444,0cyclictest0-21swapper/222:39:538
1799395994241,1cyclictest2031437-21kworker/u32:0+events_unbound00:16:078
1799395994037,1cyclictest1921441-21cat21:25:118
179943099391,25cyclictest0-21swapper/1421:34:066
1799410993939,0cyclictest0-21swapper/719:10:0513
1799395993938,1cyclictest2076718-21ntpq23:25:198
1799395993938,1cyclictest1769-21arpwatch22:41:258
179943099382,11cyclictest0-21swapper/1423:01:586
179943099380,25cyclictest0-21swapper/1421:01:096
179943099380,25cyclictest0-21swapper/1400:18:516
1799395993836,2cyclictest0-21swapper/222:26:558
1799395993836,1cyclictest1968160-21timerandwakeup22:00:238
179943099371,11cyclictest0-21swapper/1422:07:036
179943099371,11cyclictest0-21swapper/1419:33:176
179943099371,11cyclictest0-21swapper/1419:22:186
179943099370,24cyclictest0-21swapper/1423:45:546
179943099370,24cyclictest0-21swapper/1420:06:146
1799395993635,1cyclictest1944740-21kworker/u32:3+events_unbound21:53:538
1799395993634,2cyclictest1885017-21cat20:50:118
1799395993634,0cyclictest0-21swapper/223:59:278
1799395993633,3cyclictest0-21swapper/222:22:238
1799395993633,3cyclictest0-21swapper/221:33:438
1799395993633,2cyclictest1910963-21kworker/u32:2-xprtiod22:10:538
1799395993632,2cyclictest211rcu_preempt00:32:558
1799395993627,3cyclictest211rcu_preempt22:18:438
179939599360,30cyclictest2136355-21kworker/2:1-mm_percpu_wq00:28:318
179943099350,22cyclictest0-21swapper/1422:29:016
1799395993534,1cyclictest1769-21arpwatch23:30:298
1799395993533,0cyclictest0-21swapper/200:22:138
1799395993532,1cyclictest1769-21arpwatch23:10:338
1799395993434,0cyclictest2128160-21kworker/u32:2-xprtiod00:38:538
1799395993434,0cyclictest0-21swapper/221:23:098
1799395993433,1cyclictest0-21swapper/223:22:198
1799395993432,2cyclictest0-21swapper/222:47:558
1799395993432,2cyclictest0-21swapper/220:55:198
1799395993432,2cyclictest0-21swapper/220:25:148
1799395993432,0cyclictest0-21swapper/223:36:108
1799395993432,0cyclictest0-21swapper/200:00:478
1799395993431,3cyclictest0-21swapper/223:08:158
1799395993431,3cyclictest0-21swapper/221:39:378
1799395993431,2cyclictest1946848-21kworker/2:2-events22:07:238
1799395993431,0cyclictest0-21swapper/223:51:178
1799395993430,0cyclictest211rcu_preempt22:50:258
179939599342,1cyclictest43-21ksoftirqd/223:42:298
179942299330,32cyclictest0-21swapper/1121:07:563
1799416993329,4cyclictest1774-21snmpd23:22:4515
1799404993333,0cyclictest0-21swapper/519:10:0511
179940199330,32cyclictest0-21swapper/400:16:3510
179939599334,0cyclictest0-21swapper/223:48:198
1799395993332,1cyclictest1907859-21cat21:15:118
1799395993332,1cyclictest0-21swapper/222:58:518
1799395993332,1cyclictest0-21swapper/222:30:218
1799395993332,1cyclictest0-21swapper/221:55:118
1799395993332,1cyclictest0-21swapper/221:10:458
1799395993332,1cyclictest0-21swapper/219:25:118
1799395993332,1cyclictest0-21swapper/200:07:118
179939599333,1cyclictest0-21swapper/220:30:178
1799395993331,2cyclictest0-21swapper/221:05:178
1799395993329,2cyclictest2036251-21kworker/2:0-events23:15:588
1799395993327,3cyclictest1873112-21diskstats20:35:108
179939599330,31cyclictest43-21ksoftirqd/221:46:598
179939599330,31cyclictest43-21ksoftirqd/221:46:598
179939599330,31cyclictest1912901-21kworker/2:1+events21:40:358
179939599330,31cyclictest1912901-21kworker/2:1+events21:40:358
179939599330,30cyclictest1769351-21kworker/2:2+events19:30:198
179943099328,11cyclictest0-21swapper/1423:56:536
179943099328,11cyclictest0-21swapper/1420:39:116
1799419993230,1cyclictest2007336-21kworker/10:0+events22:55:172
179941699320,31cyclictest0-21swapper/923:14:2715
1799395993232,0cyclictest0-21swapper/219:24:028
1799395993231,1cyclictest0-21swapper/223:00:358
1799395993231,1cyclictest0-21swapper/219:40:158
1799395993231,1cyclictest0-21swapper/200:10:138
179939599322,1cyclictest43-21ksoftirqd/220:40:158
1799435993130,1cyclictest1774-21snmpd21:53:137
1799435993130,1cyclictest1774-21snmpd21:18:427
1799422993130,1cyclictest1774-21snmpd19:53:423
1799419993130,1cyclictest2007336-21kworker/10:0+events23:26:592
1799419993130,1cyclictest1918947-21kworker/10:1+events22:31:032
1799419993129,1cyclictest2109691-21kworker/10:1+events00:07:132
1799419993129,1cyclictest2007336-21kworker/10:0+events23:46:492
1799419993129,1cyclictest2007336-21kworker/10:0+events23:37:392
1799419993129,1cyclictest2007336-21kworker/10:0+events23:07:172
1799419993129,1cyclictest2007336-21kworker/10:0+events23:01:192
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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