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2026-05-16 - 21:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot4s.osadl.org (updated Sat May 16, 2026 12:44:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1781388994542,2cyclictest75-21kswapd011:13:511
1781388994441,2cyclictest2086885-21apt-get12:04:271
1781394994340,2cyclictest75-21kswapd011:13:523
1781394993833,3cyclictest2009023-21latency_hist10:50:003
1781394993329,3cyclictest2024707-21/usr/sbin/munin11:05:243
1781392993327,4cyclictest1946642-21apt-get09:50:022
1781392993230,1cyclictest1915682-21kworker/2:2+pm11:13:482
1781388993226,4cyclictest1905322-21latency_hist09:10:001
1781388993125,4cyclictest1781302-21latency_hist07:10:001
178138599311,28cyclictest1-21systemd09:45:010
1781392993023,5cyclictest252-21systemd-journal07:40:002
1781388993026,3cyclictest1848436-21kworker/u8:2+flush-259:009:00:011
1781385993024,4cyclictest1801937-21latency_hist07:30:010
1781392992912,5cyclictest1884779-21awk08:50:002
1781388992923,4cyclictest2118018-21latency_hist12:35:011
1781388992922,5cyclictest2029625-21latency_hist11:10:011
1781392992821,5cyclictest1978044-21latency_hist10:20:002
1781385992824,3cyclictest2055734-21apt-get11:35:120
1781388992622,3cyclictest1728295-21kworker/u8:4+flush-259:009:20:241
1781385992622,3cyclictest75-21kswapd011:13:520
1781394992522,2cyclictest2040004-21kworker/u8:3+flush-259:012:20:253
1781394992521,3cyclictest1905349-21kworker/u8:0+events_unbound10:20:173
1781394992520,4cyclictest252-21systemd-journal07:54:473
1781394992519,4cyclictest1895065-21latency_hist09:00:003
1781388992520,4cyclictest2065823-21latency_hist11:45:011
1781385992521,3cyclictest1728295-21kworker/u8:4+flush-259:009:40:010
1781394992420,3cyclictest1728295-21kworker/u8:4+flush-259:009:20:163
1781394992420,3cyclictest1728295-21kworker/u8:4+flush-259:009:00:243
1781394992420,3cyclictest1728295-21kworker/u8:4+flush-259:008:40:253
1781392992418,4cyclictest1848436-21kworker/u8:2+flush-259:008:50:172
1781388992418,4cyclictest1978309-21apt-get10:20:121
1781385992420,2cyclictest1728295-21kworker/u8:4+flush-259:009:20:000
1781385992417,5cyclictest1817360-21latency_hist07:45:010
1781385992318,3cyclictest2045161-21latency_hist11:25:000
1781385992317,4cyclictest1817789-40mandb07:45:020
1781394992217,3cyclictest1817355-21apt-get07:45:023
1781392992216,4cyclictest252-21systemd-journal12:27:572
1781392992216,4cyclictest252-21systemd-journal08:10:012
1781392992216,4cyclictest2081742-21latency_hist12:00:012
1781388992218,3cyclictest1807077-21kworker/u8:1+flush-259:008:05:001
1781388992217,3cyclictest1998960-21/usr/sbin/munin10:40:191
1781394992116,3cyclictest2014593-21diskstats10:55:153
1781394992115,4cyclictest1864202-21latency_hist08:30:003
1781392992115,4cyclictest2118031-21https12:35:012
178139299210,19cyclictest2076181-21munin-run11:55:012
1781388992116,3cyclictest1864466-21apt-get08:30:121
1781388992114,5cyclictest252-21systemd-journal10:20:001
1781385992119,2cyclictest2102448-21kworker/u8:1+events_unbound12:20:030
1781394992013,5cyclictest2013296-21ntpq10:50:223
1781392992015,4cyclictest2055699-21kworker/u8:4+flush-259:012:15:262
1781392992015,3cyclictest2014431-21apt-get10:55:132
1781388992015,4cyclictest1828357-21apt-get07:55:131
1781388992014,5cyclictest252-21systemd-journal10:35:001
1781388992013,5cyclictest1822947-21latency_hist07:50:011
1781385992015,4cyclictest1973143-21apt-get10:15:110
1781394991915,3cyclictest1738189-21kworker/u8:0+flush-259:007:15:223
1781394991914,3cyclictest1920899-21kworker/u8:3+flush-259:010:05:233
1781394991914,3cyclictest1848436-21kworker/u8:2+flush-259:009:05:233
1781394991913,4cyclictest252-21systemd-journal07:15:003
1781392991917,1cyclictest0-21swapper/211:44:592
1781392991912,5cyclictest2024470-21latency_hist11:05:012
1781388991915,3cyclictest2076308-21base6411:55:001
1781388991915,3cyclictest1905591-21apt-get09:10:131
1781388991914,4cyclictest1885025-21/usr/sbin/munin08:50:141
1781388991913,4cyclictest1988402-21latency_hist10:30:011
1781385991916,2cyclictest2014189-21kworker/u8:2+events_unbound11:09:550
1781385991914,3cyclictest252-21systemd-journal07:56:470
1781385991912,5cyclictest1786491-21latency_hist07:15:000
1781394991814,2cyclictest1848689-21latency_hist08:15:013
1781388991814,3cyclictest1946667-21gpgv09:50:001
1781388991812,4cyclictest252-21systemd-journal08:15:001
1781388991811,5cyclictest1873665-21ntpq08:35:231
1781385991816,2cyclictest2040004-21kworker/u8:3+events_unbound11:49:380
178138599180,17cyclictest1962583-21turbostat10:05:000
1781392991715,1cyclictest0-21swapper/207:45:002
1781392991714,2cyclictest1802203-21apt-get07:30:132
1781392991712,4cyclictest2050554-21apt-get11:30:112
1781388991713,3cyclictest2040004-21kworker/u8:3+events_unbound11:25:141
1781388991712,4cyclictest509-21rs:main1
178138899170,8cyclictest1859022-21awk08:25:001
178138599173,4cyclictest2011679-21grep10:50:180
178138599173,3cyclictest2052301-21cut11:30:180
178138599172,6cyclictest2097569-21cat12:15:010
178138599171,5cyclictest1967741-21sh10:10:010
1781385991710,5cyclictest1947192-21cp09:50:010
178139499169,5cyclictest1946641-21latency_hist09:50:013
1781394991613,2cyclictest1940516-21needreboot09:40:193
1781394991611,3cyclictest1738189-21kworker/u8:0+events_unbound07:35:193
1781394991610,4cyclictest252-21systemd-journal11:50:003
1781394991610,4cyclictest2113093-21/usr/sbin/munin12:30:213
1781388991614,1cyclictest1952235-21cron09:55:011
1781388991612,3cyclictest1728295-21kworker/u8:4+flush-259:007:25:231
178138599169,5cyclictest2003859-21latency_hist10:45:000
178138599163,8cyclictest1926689-21if_enp0s30f409:30:150
178138599163,3cyclictest1802660-21cut07:30:180
178138599163,2cyclictest1993824-21apt-get10:35:130
178138599162,5cyclictest1828080-21latency_hist07:55:000
178138599161,5cyclictest2075281-21ntpq11:50:220
1781385991613,2cyclictest1847733-21needreboot08:10:200
1781385991611,1cyclictest191rcu_preempt07:15:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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