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2026-05-27 - 19:32

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

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 rackcslot7s.osadl.org (updated Wed May 27, 2026 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
181982422540,8sleep03056-21PK-Backend07:05:140
190396721300,4sleep13056-21PK-Backend11:00:181
187784421300,3sleep23056-21PK-Backend09:45:202
18201082790,9sleep20-21swapper/207:05:192
139099750,62rtkit-daemon0-21swapper/107:07:141
182089027439,10sleep30-21swapper/307:09:533
18293502520,4sleep23056-21PK-Backend07:30:152
19013312490,4sleep13056-21PK-Backend10:55:001
182107099360,17cyclictest1883750-21cat10:05:023
182107099352,18cyclictest0-21swapper/311:30:033
182107099321,18cyclictest1909674-21runrttasks11:17:523
182107099320,19cyclictest1823291-21sed07:15:033
182107099320,19cyclictest1823291-21sed07:15:033
182107099320,17cyclictest1908009-21taskset11:13:463
182107099310,17cyclictest1888703-21taskset10:19:173
139099310,4rtkit-daemon1389-21rtkit-daemon09:02:132
182107099301,16cyclictest42-21ksoftirqd/309:28:013
182107099300,18cyclictest0-21swapper/311:56:543
182107099300,18cyclictest0-21swapper/309:02:113
182107099300,17cyclictest1873118-21taskset09:34:313
139099300,4rtkit-daemon1389-21rtkit-daemon12:13:022
139099300,4rtkit-daemon1389-21rtkit-daemon08:25:392
182107099290,27cyclictest1932117-21needreboot12:20:183
182107099290,16cyclictest0-21swapper/309:56:443
182107099270,25cyclictest1938570-21cat12:40:003
182107099261,23cyclictest1848935-21df08:25:143
1821070992611,14cyclictest1859342-21df08:55:143
1821070992610,14cyclictest1897036-21cat10:40:203
182107099260,25cyclictest1925626-21seq12:00:363
182107099260,24cyclictest1885975-21hddtemp_smartct10:10:133
182107099260,17cyclictest1916800-21seq11:36:583
19014622250,3sleep0161rcuc/010:55:120
182107099259,14cyclictest1904256-21cat11:00:203
182107099259,14cyclictest1843151-21cut08:10:023
182107099252,21cyclictest1905567-21needreboot11:05:143
182107099251,22cyclictest1856364-21grep08:45:193
182107099251,20cyclictest1836183-21apt07:50:113
1821070992510,13cyclictest1894020-21ls10:35:013
182107099250,23cyclictest1885375-21cut10:10:013
182107099250,23cyclictest1844112-21ntp_states08:10:193
182107099250,23cyclictest1821413-21tr07:10:123
182107099250,15cyclictest3056-21PK-Backend12:29:583
182106599250,23cyclictest1389-21rtkit-daemon10:50:092
182107099249,14cyclictest1895241-21sed10:35:213
182107099249,13cyclictest1880092-21cron09:55:013
182107099246,16cyclictest1826368-21wc07:20:193
182107099245,17cyclictest1900302-21missed_timers10:50:163
182107099241,20cyclictest1862771-21apt09:05:103
182107099240,3cyclictest1895000-21snapd09:39:133
182107099240,22cyclictest1930076-21seq12:15:113
182107099240,22cyclictest1889782-21ntp_states10:20:193
182107099240,1cyclictest0-21swapper/308:35:233
182107099236,15cyclictest1936397-21grep12:34:593
182107099234,17cyclictest1868143-21tr09:20:123
182107099232,20cyclictest1846568-21cron08:20:003
182107099232,18cyclictest0-21swapper/308:40:113
1821070992312,9cyclictest1866209-21/usr/sbin/munin09:15:143
182107099231,19cyclictest1834189-21apt07:45:123
182107099231,19cyclictest0-21swapper/308:30:123
182107099231,18cyclictest3056-21PK-Backend07:40:113
182107099230,21cyclictest1926228-21/usr/sbin/munin12:05:113
182107099230,21cyclictest1898335-21missed_timers10:45:153
182107099230,11cyclictest1891137-21df10:25:133
182106599230,21cyclictest1868334-21df09:20:122
182106299230,20cyclictest1875174-21apt09:40:101
1821058992321,1cyclictest0-21swapper/008:51:160
182107099229,11cyclictest1919845-21ps11:45:193
182107099229,11cyclictest1901907-21if_err_enp2s010:55:163
182107099228,12cyclictest42-21ksoftirqd/307:55:143
182107099222,16cyclictest1910353-21apt-get11:20:043
1821070992220,1cyclictest0-21swapper/308:50:173
182107099221,19cyclictest1865577-21users09:10:223
182107099221,19cyclictest1829310-21/usr/sbin/munin07:30:153
182107099221,18cyclictest1927985-21apt12:10:103
182107099221,18cyclictest1846839-21apt08:20:103
182107099221,18cyclictest1846839-21apt08:20:103
1821070992210,10cyclictest1921396-21missed_timers11:50:163
182107099220,2cyclictest1912852-21ntpq11:25:203
1821065992217,3cyclictest1867708-21turbostat.cron09:19:592
1821062992219,2cyclictest3056-21PK-Backend09:28:271
182106299220,21cyclictest3056-21PK-Backend07:59:391
1821058992220,1cyclictest3056-21PK-Backend10:05:230
1821058992220,1cyclictest0-21swapper/012:34:140
1821058992220,1cyclictest0-21swapper/011:58:590
1821058992220,1cyclictest0-21swapper/010:04:010
1821058992220,1cyclictest0-21swapper/007:34:100
1821058992219,2cyclictest3056-21PK-Backend10:45:040
182105899220,21cyclictest0-21swapper/011:13:510
182105899220,21cyclictest0-21swapper/010:44:170
182107099211,17cyclictest0-21swapper/311:40:103
182107099210,19cyclictest1840493-21cat08:00:173
182106599212,17cyclictest1095-21runrttasks08:38:592
1821065992114,5cyclictest1858740-21systemctl08:55:002
182106599210,2cyclictest1887074-21unin-run10:15:012
182106599210,20cyclictest0-21swapper/211:44:102
182106599210,20cyclictest0-21swapper/207:53:202
182106599210,19cyclictest3056-21PK-Backend09:53:032
182106599210,19cyclictest0-21swapper/210:35:022
1821062992119,1cyclictest3056-21PK-Backend08:57:241
1821062992118,2cyclictest3056-21PK-Backend11:50:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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