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2026-04-25 - 07:17

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 Sat Apr 25, 2026 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29018421140,3sleep13056-21PK-Backend23:50:191
21375721040,4sleep13056-21PK-Backend20:15:141
23255321010,3sleep00-21swapper/021:10:100
18980927940,14sleep20-21swapper/219:09:152
18961927743,28sleep30-21swapper/319:06:483
139099730,60rtkit-daemon0-21swapper/019:08:060
18839727245,17sleep10-21swapper/119:05:121
2292392500,2sleep00-21swapper/021:00:120
2842152480,2sleep13056-21PK-Backend23:35:111
2736462470,4sleep13056-21PK-Backend23:05:111
139099430,5rtkit-daemon3056-21PK-Backend19:24:051
139099430,5rtkit-daemon3056-21PK-Backend19:24:051
2005022390,3sleep10-21swapper/119:35:201
139099390,3rtkit-daemon3056-21PK-Backend22:04:241
2400322370,1sleep2240033-21cat21:30:132
139099370,3rtkit-daemon3056-21PK-Backend20:44:111
139099370,3rtkit-daemon3056-21PK-Backend20:12:051
139099370,3rtkit-daemon3056-21PK-Backend19:41:561
2547362360,2sleep30-21swapper/322:10:123
190011993228,2cyclictest226478-21python320:50:202
190011993114,10cyclictest285637-21taskset23:39:292
19001199305,23cyclictest0-21swapper/219:15:032
19001499291,26cyclictest291897-21ntp_states23:55:203
19001499291,26cyclictest291897-21ntp_states23:55:203
19001199286,9cyclictest300481-21taskset00:20:152
19001199275,6cyclictest285963-21apt23:40:122
19001199274,14cyclictest0-21swapper/222:20:212
19001199269,15cyclictest241767-21expr21:35:132
19001199268,16cyclictest280521-21unin-run23:25:002
19001199265,6cyclictest190517-21expr19:10:122
19000799260,7cyclictest3056-21PK-Backend23:55:191
19000799260,7cyclictest3056-21PK-Backend23:55:191
19001199259,14cyclictest219021-21expr20:30:142
19001199259,14cyclictest212393-21taskset20:10:182
19001199253,14cyclictest0-21swapper/222:25:212
190011992512,11cyclictest221208-21ps20:35:202
2330112240,4sleep13056-21PK-Backend21:10:161
19001499240,4cyclictest305688-21/usr/sbin/munin00:35:143
19001199248,14cyclictest2156-21gnome-shell22:45:092
19001199245,7cyclictest0-21swapper/200:25:222
190011992422,1cyclictest253955-21apt-get22:10:032
190011992416,5cyclictest294846-21cnf-update-db00:05:012
190011992416,5cyclictest294846-21cnf-update-db00:05:012
190011992411,10cyclictest290898-21munin-run23:55:012
1911562230,6chrt191158-21cat19:10:200
190014992318,3cyclictest282855-21df23:30:123
190014992317,4cyclictest290759-21runrttasks23:53:303
190014992315,5cyclictest219551-21python320:30:213
19001499231,19cyclictest0-21swapper/320:40:103
19001199238,14cyclictest2176-21JS10:27:482
19001199234,18cyclictest208262-21/usr/sbin/munin20:00:152
190011992316,5cyclictest34-21ksoftirqd/220:20:102
190011992316,5cyclictest34-21ksoftirqd/220:20:102
190011992315,5cyclictest223011-21python320:40:192
190011992314,7cyclictest245618-21diskstats21:45:152
190011992314,5cyclictest298370-21apt00:15:132
190011992313,6cyclictest227326-21/usr/sbin/munin20:55:232
190011992310,11cyclictest232432-21cat21:10:012
190011992310,11cyclictest230538-21cron21:05:002
19000799230,21cyclictest3056-21PK-Backend19:53:191
190004992315,6cyclictest238897-21python321:25:200
139099230,16rtkit-daemon3056-21PK-Backend23:32:321
2532282220,6sleep30-21swapper/322:05:193
2532282220,6sleep30-21swapper/322:05:193
2039582220,7sleep013-21ksoftirqd/019:45:210
19001499225,15cyclictest285281-21timerwakeupswit23:35:223
190014992214,6cyclictest192822-21fw_packets19:15:153
19001499220,3cyclictest216328-21taskset20:20:383
19001499220,3cyclictest216328-21taskset20:20:383
19001199228,13cyclictest196637-21uname19:25:162
19001199228,12cyclictest273315-21unin-run23:05:002
190011992220,1cyclictest0-21swapper/223:32:092
190011992220,1cyclictest0-21swapper/221:59:352
190011992220,1cyclictest0-21swapper/200:14:132
190011992218,3cyclictest1895000-21snapd22:19:132
190011992213,5cyclictest270088-21apt22:55:112
190011992212,6cyclictest223889-21apt20:45:132
190011992211,8cyclictest194429-21apt19:20:122
190011992211,8cyclictest194429-21apt19:20:122
190011992210,10cyclictest202808-21cron19:45:012
190011992210,10cyclictest1095-21runrttasks19:32:022
19001199220,21cyclictest0-21swapper/223:27:292
19001199220,20cyclictest0-21swapper/219:54:022
190007992219,2cyclictest3056-21PK-Backend23:10:291
19000799220,20cyclictest3056-21PK-Backend21:04:221
190004992220,1cyclictest0-21swapper/022:07:530
190004992220,1cyclictest0-21swapper/022:07:530
19000499220,21cyclictest0-21swapper/020:38:100
19001499216,3cyclictest232614-21cpuspeed21:10:113
190014992118,2cyclictest3056-21PK-Backend00:28:183
190014992114,5cyclictest243193-21mktemp21:40:013
190014992114,5cyclictest229792-21ntp_kernel_pll_21:00:173
19001199219,10cyclictest210468-21if_err_enp2s020:05:162
19001199218,3cyclictest275429-21apt-config23:10:012
19001199212,15cyclictest82332-21update-manager23:18:522
190011992119,1cyclictest0-21swapper/221:44:142
190011992119,1cyclictest0-21swapper/221:18:252
190011992119,1cyclictest0-21swapper/221:18:252
190011992119,1cyclictest0-21swapper/220:26:132
190011992118,2cyclictest0-21swapper/221:13:592
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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