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2026-04-25 - 22:58

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 Apr 25, 2026 12:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1806840997672,3cyclictest1801436-21kworker/u8:2+events_unbound07:10:032
1806840995653,2cyclictest75-21kswapd007:10:012
1806837994540,3cyclictest2091492-21apt-get11:45:121
1806832994438,4cyclictest1957023-21latency_hist09:35:010
1806837994237,3cyclictest1879323-21kworker/u8:2+flush-259:011:05:191
1806832994138,2cyclictest2138375-21kworker/u8:3+events_unbound12:35:220
1806832994137,3cyclictest252-21systemd-journal10:19:590
1806840993933,4cyclictest2096392-21latency_hist11:50:012
1806832993730,5cyclictest1936914-21diskstats09:15:140
1806840993630,4cyclictest2060013-21latency_hist11:15:002
1806845993528,5cyclictest2096655-21apt-get11:50:133
1806845993324,6cyclictest1915446-21latency_hist08:55:013
1806840993329,3cyclictest2039603-21/usr/sbin/munin10:55:142
1806840993329,3cyclictest1998072-21kworker/u8:0+flush-259:011:45:002
1806840993329,3cyclictest1879323-21kworker/u8:2+events_unbound11:05:172
1806840993328,3cyclictest1962400-21/usr/sbin/munin09:40:152
1806832993329,3cyclictest1936108-21kworker/u8:4+flush-259:010:00:200
1806845993228,3cyclictest75-21kswapd007:10:013
1806840993229,2cyclictest1998072-21kworker/u8:0+events_unbound11:25:182
1806840993228,3cyclictest1879323-21kworker/u8:2+flush-259:010:15:002
1806840993128,2cyclictest2102511-21kworker/u8:1+events_unbound11:55:222
1806837993125,4cyclictest1895035-21kworker/u8:4+flush-259:008:50:161
1806837993124,5cyclictest1930043-21ntpq09:05:231
1806832993127,3cyclictest509-21rs:main0
1806832993125,5cyclictest1924871-21ntpq09:00:220
1806840993024,4cyclictest2024177-21/usr/sbin/munin10:40:152
1806837993026,3cyclictest1879323-21kworker/u8:2+events_unbound10:45:131
1806837993025,4cyclictest252-21systemd-journal12:05:011
1806837993025,4cyclictest2133608-21apt-get12:25:131
1806837993025,3cyclictest1983069-21apt-get10:00:111
1806832993027,2cyclictest1998072-21kworker/u8:0+flush-259:010:30:140
1806832993027,2cyclictest1812185-21kworker/u8:0+events_unbound08:05:330
1806832993026,3cyclictest1998072-21kworker/u8:0+flush-259:010:40:240
1806832993026,3cyclictest1925813-21kworker/u8:3+events_unbound09:10:140
1806832993025,3cyclictest252-21systemd-journal07:38:330
1806837992926,2cyclictest1936108-21kworker/u8:4+events_unbound09:20:021
1806837992925,3cyclictest2091272-21kworker/u8:3+flush-259:011:50:161
1806832992925,3cyclictest1925813-21kworker/u8:3+flush-259:009:06:320
1806832992925,3cyclictest1879323-21kworker/u8:2+flush-259:008:35:270
1806840992825,2cyclictest1998072-21kworker/u8:0+events_unbound10:55:012
1806840992825,2cyclictest1879323-21kworker/u8:2+flush-259:009:55:262
1806837992824,3cyclictest1998072-21kworker/u8:0+flush-259:011:15:191
1806837992822,4cyclictest1863833-21latency_hist08:05:001
180683299281,25cyclictest1-21systemd11:24:330
1806845992722,4cyclictest1998072-21kworker/u8:0+flush-259:011:00:213
1806840992725,2cyclictest1936108-21kworker/u8:4+flush-259:010:00:212
1806840992724,2cyclictest1936107-21kworker/u8:0+flush-259:009:25:202
1806840992724,2cyclictest1879323-21kworker/u8:2+flush-259:011:25:012
1806840992724,2cyclictest1879323-21kworker/u8:2+events_unbound09:45:222
1806840992723,3cyclictest1998072-21kworker/u8:0+events_unbound10:30:222
1806840992723,3cyclictest1936108-21kworker/u8:4+flush-259:009:35:142
1806840992721,4cyclictest252-21systemd-journal08:00:002
1806832992723,3cyclictest2091272-21kworker/u8:3+events_unbound11:50:220
1806832992723,3cyclictest1998072-21kworker/u8:0+events_unbound11:35:210
1806832992723,3cyclictest1998072-21kworker/u8:0+events_unbound10:50:200
1806832992722,4cyclictest1874147-21latency_hist08:15:010
1806832992722,4cyclictest1874147-21latency_hist08:15:000
1806840992622,3cyclictest1879323-21kworker/u8:2+events_unbound10:15:172
1806837992622,3cyclictest2091272-21kworker/u8:3+events_unbound11:55:211
1806837992622,3cyclictest1879323-21kworker/u8:2+flush-259:010:25:171
1806837992620,5cyclictest1972479-21latency_hist09:50:001
1806837992620,4cyclictest2086376-21apt-get11:40:111
1806832992622,3cyclictest2102511-21kworker/u8:1+events_unbound12:10:220
1806832992620,4cyclictest2102157-21base6411:55:020
1806845992514,10cyclictest1801436-21kworker/u8:2+flush-259:007:35:003
1806840992523,2cyclictest1795448-21kworker/u8:1+events_unbound07:15:232
1806840992522,2cyclictest1869005-21kworker/u8:1+flush-259:008:15:202
1806840992522,2cyclictest1812185-21kworker/u8:0+events_unbound07:36:332
1806840992521,3cyclictest2060275-21apt-get11:15:132
1806840992519,4cyclictest2013642-21latency_hist10:30:012
1806837992519,4cyclictest1935168-21ntpq09:10:211
1806837992519,4cyclictest1879516-21/usr/sbin/munin08:20:171
1806832992521,3cyclictest1936107-21kworker/u8:0+flush-259:009:40:170
1806832992521,3cyclictest1936107-21kworker/u8:0+events_unbound09:20:130
1806832992521,3cyclictest1879323-21kworker/u8:2+events_unbound10:05:130
1806832992521,3cyclictest1801436-21kworker/u8:2+events_unbound07:30:180
1806845992419,4cyclictest1879323-21kworker/u8:2+flush-259:010:50:003
1806845992419,3cyclictest1925813-21kworker/u8:3+flush-259:009:10:203
1806845992418,4cyclictest1894809-21latency_hist08:35:003
1806840992421,2cyclictest2102511-21kworker/u8:1+flush-259:012:05:212
1806840992421,2cyclictest1812185-21kworker/u8:0+events_unbound08:10:152
1806840992421,2cyclictest1812185-21kworker/u8:0+events_unbound08:10:152
1806840992420,3cyclictest1998072-21kworker/u8:0+flush-259:011:00:252
1806837992420,3cyclictest1936107-21kworker/u8:0+flush-259:009:30:001
1806837992420,3cyclictest1838015-21kworker/u8:3+events_unbound08:25:231
1806837992419,4cyclictest252-21systemd-journal07:20:011
1806832992420,3cyclictest1838015-21kworker/u8:3+events_unbound08:25:170
1806840992319,3cyclictest1998072-21kworker/u8:0+flush-259:010:20:542
1806840992317,4cyclictest252-21systemd-journal07:34:592
1806837992319,3cyclictest2128204-21kworker/u8:1+flush-259:012:30:201
1806837992318,3cyclictest1874380-21/usr/sbin/munin08:15:141
1806832992320,2cyclictest1998072-21kworker/u8:0+events_unbound11:15:240
1806832992319,3cyclictest1900267-21apt-get08:40:110
1806832992319,3cyclictest1879323-21kworker/u8:2+events_unbound10:25:150
1806832992318,4cyclictest2106726-21kworker/u8:4+events_unbound12:08:340
1806845992214,6cyclictest1895044-21/usr/sbin/munin08:35:143
1806845992214,5cyclictest1817341-21latency_hist07:20:013
1806840992219,2cyclictest2122656-21kworker/u8:2+flush-259:012:20:002
1806840992219,2cyclictest1838015-21kworker/u8:3+events_unbound08:30:212
1806840992218,3cyclictest2128204-21kworker/u8:1+events_unbound12:24:352
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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