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2026-05-17 - 20:44

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
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.

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 100 highest latencies:
System rack5slot4s.osadl.org (updated Sun May 17, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16897362720,4sleep30-21swapper/307:25:573
17547102630,3sleep0201rcuc/008:30:580
17922312590,1sleep01792234-21cut09:10:560
1670648995539,14cyclictest1875659-21apt-get10:35:470
1670648995430,21cyclictest280-21systemd-journal10:20:000
1670650995346,5cyclictest1870162-40mandb10:27:351
167064899521,38cyclictest1999637-21true12:40:010
1670653995043,5cyclictest280-21systemd-journal09:25:122
1670650994942,5cyclictest280-21systemd-journal11:40:381
1670650994939,7cyclictest280-21systemd-journal09:34:351
1670648994726,8cyclictest1953948-21ntpq11:51:020
1670648994638,6cyclictest1810200-21ntpq09:26:010
1670648994624,8cyclictest1864555-21ntpq10:21:010
1670648994539,4cyclictest1865737-21apt-get10:25:490
167064899451,42cyclictest1-21systemd12:10:460
1670648994437,5cyclictest1650632-21kworker/u8:3+flush-8:009:50:500
1670648994435,7cyclictest1900556-21/usr/sbin/munin11:01:010
167064899443,17cyclictest583-21snmpd08:45:470
1670648994422,6cyclictest280-21systemd-journal10:45:010
1670653994334,7cyclictest1687310-21cron07:25:002
1670650994337,4cyclictest280-21systemd-journal12:35:521
1670650994334,7cyclictest1854664-21ntpq10:11:021
1670650994334,6cyclictest1905182-21latency_hist11:05:011
1670648994324,5cyclictest1800793-21grep09:16:070
1670648994324,5cyclictest1800793-21grep09:16:060
1670648994235,5cyclictest1756790-21apt-get08:35:480
1670648994233,6cyclictest1825895-21latency_hist09:45:010
1670648994231,9cyclictest1801757-21diskstats09:20:530
1670648994231,9cyclictest1671119-21diskstats07:10:540
1670650994130,8cyclictest280-21systemd-journal07:46:351
1670650994032,5cyclictest280-21systemd-journal10:21:331
1670648993831,5cyclictest1741644-21sh08:20:000
1670648993828,8cyclictest1726018-21ntpq08:01:020
1670648993730,5cyclictest1741983-21apt-get08:20:470
1670650993627,6cyclictest280-21systemd-journal10:59:341
1670650993626,7cyclictest1885218-21latency_hist10:45:001
1670648993629,5cyclictest1650632-21kworker/u8:3+flush-8:010:00:540
1670650993529,4cyclictest280-21systemd-journal08:30:341
1670648993525,8cyclictest1790387-21ntpq09:06:030
167064899352,27cyclictest1682407-21kworker/0:0+events07:35:490
1670653993426,6cyclictest280-21systemd-journal12:19:592
1670650993426,6cyclictest1741958-21/usr/sbin/munin08:20:591
1670648993427,5cyclictest1940025-21latency_hist11:40:000
1670648993427,5cyclictest1721003-21ntpq07:55:590
1670650993326,5cyclictest1905493-21apt-get11:05:491
1670650993322,9cyclictest280-21systemd-journal08:00:011
1670648993325,6cyclictest1979539-21latency_hist12:20:010
1670648993323,8cyclictest1839791-21ntpq09:56:010
1670650993228,3cyclictest1665613-21kworker/u8:1+events_unbound10:30:251
1670650993228,3cyclictest1665613-21kworker/u8:1+events_unbound08:53:181
1670650993225,5cyclictest1796523-21apt-get09:15:471
1670650993225,5cyclictest1796523-21apt-get09:15:471
1670648993224,6cyclictest1890942-21diskstats10:50:530
1670648993224,6cyclictest1829939-21ntpq09:46:020
1670648993222,8cyclictest1885311-21cp10:45:000
167065099317,16cyclictest1841029-21apt-get10:00:491
1670650993126,4cyclictest1665613-21kworker/u8:1+flush-8:007:54:401
1670650993125,5cyclictest1665613-21kworker/u8:1+flush-8:008:55:311
1670648993128,2cyclictest1650632-21kworker/u8:3+flush-8:007:29:360
1670648993126,3cyclictest1816842-21irqcore09:35:550
1670653993010,10cyclictest0-21swapper/211:50:592
1670650993026,3cyclictest1650632-21kworker/u8:3+flush-8:007:20:001
1670650993026,3cyclictest1650632-21kworker/u8:3+flush-8:007:19:591
1670650993025,3cyclictest1989476-21systemd-run12:30:011
1670650993025,3cyclictest1860414-21cron10:20:001
1670650993024,4cyclictest1741657-21latency_hist08:20:001
1670650993023,5cyclictest1969953-21apt-get12:10:471
1670650993018,1cyclictest161rcu_preempt11:10:521
1670650993018,1cyclictest161rcu_preempt11:10:521
1670648993025,3cyclictest1985314-21irqcore12:25:550
1670648993025,3cyclictest1761946-21cpuspeed_turbos08:40:510
1670648993021,6cyclictest1850573-21latency_hist10:10:010
1670648993020,8cyclictest1730883-21ntpq08:06:050
1670648993019,9cyclictest1732343-21diskstats08:10:530
1670653992925,2cyclictest1915630-21fschecks_count11:15:552
1670653992921,6cyclictest280-21systemd-journal08:30:002
167065099297,4cyclictest30-21ksoftirqd/112:05:591
167065099296,15cyclictest1949101-21ntpq11:46:051
167065099296,15cyclictest1890854-21awk10:50:511
1670650992924,3cyclictest1825135-21seq09:41:051
1670650992913,10cyclictest1686385-21needreboot07:21:011
1670650992912,9cyclictest1691351-21ntpq07:25:591
167065099291,12cyclictest0-21swapper/109:10:501
1670648992917,9cyclictest1910676-21diskstats11:10:530
1670648992917,9cyclictest1910676-21diskstats11:10:520
16658412292,6sleep00-21swapper/007:05:200
1670653992820,6cyclictest280-21systemd-journal08:42:342
1670653992810,4cyclictest0-21swapper/209:40:572
1670653992810,4cyclictest0-21swapper/207:15:592
1670653992810,4cyclictest0-21swapper/207:15:592
1670653992810,10cyclictest0-21swapper/207:25:562
167065099286,11cyclictest30-21ksoftirqd/109:05:011
1670650992823,3cyclictest1757381-21irqcore08:35:551
1670650992820,6cyclictest280-21systemd-journal09:58:351
1670650992811,10cyclictest1761722-21apt-get08:40:471
1670648992823,4cyclictest1775841-21unixbench_multi08:51:090
1670653992724,2cyclictest1716952-21cron07:55:002
1670653992722,3cyclictest1880285-21idleruntime-cro10:40:002
167065099278,4cyclictest30-21ksoftirqd/110:05:591
167065099277,9cyclictest161rcu_preempt11:15:581
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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