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2026-04-13 - 09:38

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 Mon Apr 13, 2026 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
180959321270,3sleep00-21swapper/021:35:020
176847721120,3sleep03056-21PK-Backend19:35:190
178069621020,3sleep00-21swapper/020:10:200
139099850,71rtkit-daemon0-21swapper/319:05:043
175788428140,13sleep10-21swapper/119:06:051
175812426544,14sleep00-21swapper/019:09:090
175798126444,14sleep20-21swapper/219:07:182
18511102500,1sleep20-21swapper/223:30:192
18524412480,3sleep30-21swapper/323:35:133
18721872440,4sleep20-21swapper/200:30:182
18077732440,3sleep1251rcuc/121:30:011
17616352380,3sleep30-21swapper/319:15:213
175835699302,6cyclictest0-21swapper/219:55:112
1758356993010,5cyclictest1793843-21sed20:50:002
175835699298,7cyclictest436-20systemd-journal22:50:002
175835699298,6cyclictest1836677-21cat22:50:142
175835699292,6cyclictest0-21swapper/200:35:122
175835699292,5cyclictest0-21swapper/223:50:132
1758359992813,13cyclictest1820365-21unin-run22:05:023
175835699288,5cyclictest1787829-21cat20:30:242
175835699286,6cyclictest1848585-21find23:25:102
175835699281,9cyclictest1862502-21perf00:05:002
1758359992712,13cyclictest1832765-21unin-run22:40:003
175835699279,6cyclictest1803425-21sshd21:15:192
175835699278,5cyclictest1848415-21wc23:25:002
175835699278,5cyclictest1801345-21expr21:10:122
175835699277,5cyclictest1804653-21expr21:20:132
175835699277,5cyclictest1804653-21expr21:20:132
175835699273,9cyclictest1769439-21apt19:40:102
175835699272,10cyclictest0-21swapper/223:55:112
175835699271,9cyclictest1772660-21idleruntime-cro19:50:002
1758356992711,4cyclictest1839043-21processes22:55:192
175835699267,5cyclictest1794458-21ls20:50:172
175835699262,8cyclictest82332-21update-manager21:55:062
175835699261,8cyclictest1758694-21cpuspeed_turbos19:10:142
175835699261,8cyclictest1-21systemd20:40:002
175835699261,7cyclictest1778115-21apt20:05:112
1758356992613,3cyclictest1867090-21python300:15:192
175835699260,9cyclictest1842332-21tail23:05:182
175835999253,12cyclictest0-21swapper/322:20:543
175835699258,3cyclictest0-21swapper/223:00:212
175835699252,6cyclictest1825525-21apt-get22:20:032
175835699251,9cyclictest1832134-21python322:35:212
175835699251,8cyclictest1857268-21sh23:50:002
175835699251,8cyclictest1769157-21cron19:40:012
175835699251,7cyclictest1834469-21sh22:45:002
175835699251,7cyclictest1785057-21apt20:25:122
175835699251,6cyclictest1809418-21sleep21:35:002
175835699251,10cyclictest1780992-21python320:11:052
175835699250,4cyclictest978-21snmpd20:42:542
175835699250,10cyclictest1819002-21cut22:00:122
18565282240,8sleep126-21ksoftirqd/123:45:181
1758359992412,10cyclictest1808304-21df_inode21:30:133
175835699247,4cyclictest0-21swapper/220:20:172
175835699245,5cyclictest1765092-21/usr/sbin/munin19:25:202
175835699241,7cyclictest1766807-21/usr/sbin/munin19:30:202
175835699241,5cyclictest18681912chrt00:20:032
1758356992410,3cyclictest1795760-21/usr/sbin/munin20:55:182
1758354992415,7cyclictest1836197-21cron22:50:001
18431822230,2sleep00-21swapper/023:10:000
175835999235,16cyclictest1009-21lldpd22:00:003
175835999230,12cyclictest0-21swapper/320:10:013
175835699238,4cyclictest1799737-21kernelversion21:05:162
175835699236,3cyclictest0-21swapper/221:50:012
175835699232,8cyclictest1846005-21python323:15:242
175835699231,8cyclictest1811630-21apt-get21:40:052
1758356992317,5cyclictest0-21swapper/219:15:272
175835699231,10cyclictest1828661-21python322:25:202
18031172220,3sleep0161rcuc/021:15:160
175835999226,14cyclictest1867302-21users00:15:213
175835999226,14cyclictest1843617-21ls23:10:123
175835999226,14cyclictest1838781-21memory22:55:173
1758359992220,1cyclictest0-21swapper/320:45:113
1758359992220,1cyclictest0-21swapper/319:59:083
1758359992220,1cyclictest0-21swapper/319:41:563
1758359992220,1cyclictest0-21swapper/300:35:333
1758359992220,1cyclictest0-21swapper/300:01:403
175835999221,6cyclictest1846460-21sshd23:18:193
1758359992212,7cyclictest436-20systemd-journal21:08:193
175835999220,21cyclictest0-21swapper/321:18:573
175835699221,7cyclictest1798391-21python321:00:212
175835699221,6cyclictest1821467-21python322:05:202
1758356992215,5cyclictest883-21dbus-daemon22:35:002
1758354992219,2cyclictest3056-21PK-Backend22:53:361
175835499220,20cyclictest3056-21PK-Backend19:45:051
1758350992220,1cyclictest0-21swapper/023:43:090
1758350992220,1cyclictest0-21swapper/023:33:360
1758350992220,1cyclictest0-21swapper/022:40:430
1758350992220,1cyclictest0-21swapper/020:27:000
1758350992220,1cyclictest0-21swapper/019:49:140
1758350992220,1cyclictest0-21swapper/000:31:150
1758350992212,8cyclictest2254-21gdbus20:40:040
175835099220,21cyclictest0-21swapper/023:23:020
175835999217,4cyclictest1850836-21uname23:30:163
175835999217,3cyclictest1764281-21cpuspeed19:25:123
175835999215,14cyclictest1858413-21python323:50:223
1758359992119,1cyclictest0-21swapper/322:51:303
1758359992119,1cyclictest0-21swapper/321:54:253
1758359992119,1cyclictest0-21swapper/319:51:503
1758359992119,1cyclictest0-21swapper/300:13:503
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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