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2026-03-13 - 23:03

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #3

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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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 highest latencies:
System rack3slot3s.osadl.org (updated Fri Mar 13, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1711220212468,52sleep30-21swapper/33
171112528263,12sleep10-21swapper/11
171120428051,11sleep20-21swapper/22
171118227953,18sleep00-21swapper/00
171150499226,12cyclictest2130531-21taskset3
1711504992218,2cyclictest0-21swapper/33
171150499211,16cyclictest66950irq/132-enp1s0-TxRx-33
22087592201,9sleep11842393-21diskmemload1
171150499205,12cyclictest0-21swapper/33
171150499201,15cyclictest1716642-21taskset3
171150499201,15cyclictest0-21swapper/33
171150499201,12cyclictest0-21swapper/33
19893802191,4sleep00-21swapper/00
1711504991917,1cyclictest0-21swapper/33
1711504991917,1cyclictest0-21swapper/33
1711504991916,1cyclictest0-21swapper/33
1711504991915,2cyclictest0-21swapper/33
1711504991915,2cyclictest0-21swapper/33
1711504991911,7cyclictest0-21swapper/33
171150499191,15cyclictest0-21swapper/33
171150499191,15cyclictest0-21swapper/33
171150499191,14cyclictest0-21swapper/33
171150499191,14cyclictest0-21swapper/33
171150499191,14cyclictest0-21swapper/33
171150499191,14cyclictest0-21swapper/33
171150499191,14cyclictest0-21swapper/33
1711504991910,6cyclictest2050488-21taskset3
171150499190,12cyclictest0-21swapper/33
21199522180,3sleep10-21swapper/11
19969152181,3sleep20-21swapper/22
171150499181,6cyclictest1783201-21taskset3
171150499181,5cyclictest0-21swapper/33
1711504991815,1cyclictest0-21swapper/33
1711504991814,2cyclictest0-21swapper/33
1711504991813,2cyclictest0-21swapper/33
1711504991812,3cyclictest0-21swapper/33
171150499181,14cyclictest0-21swapper/33
171150499181,14cyclictest0-21swapper/33
171150499181,14cyclictest0-21swapper/33
171150499181,14cyclictest0-21swapper/33
171150499181,14cyclictest0-21swapper/33
171150499181,14cyclictest0-21swapper/33
171150499181,14cyclictest0-21swapper/33
171150499181,13cyclictest0-21swapper/33
171150499181,13cyclictest0-21swapper/33
171150499181,13cyclictest0-21swapper/33
171150499181,13cyclictest0-21swapper/33
171150499180,14cyclictest1799482-21sleep3
20858512171,3sleep20-21swapper/22
19376962171,2sleep00-21swapper/00
171150499172,11cyclictest2092402-21taskset3
1711504991713,2cyclictest0-21swapper/33
1711504991713,2cyclictest0-21swapper/33
1711504991713,2cyclictest0-21swapper/33
171150499171,14cyclictest0-21swapper/33
171150499171,14cyclictest0-21swapper/33
171150499171,13cyclictest0-21swapper/33
171150499170,14cyclictest0-21swapper/33
21736662161,2sleep00-21swapper/00
19893122160,1sleep20-21swapper/22
19449292160,5sleep11842393-21diskmemload1
19179732161,10sleep11842393-21diskmemload1
171150499168,4cyclictest1794205-21sleep3
171150499161,3cyclictest0-21swapper/33
1711504991613,1cyclictest0-21swapper/33
171150499160,13cyclictest0-21swapper/33
171150499160,13cyclictest0-21swapper/33
171150499160,12cyclictest0-21swapper/33
22105702151,10sleep02210585-21ssh0
19655172151,8sleep21842393-21diskmemload2
19370992151,3sleep11842393-21diskmemload1
18469522151,9sleep11847018-21ntpq1
18221452151,3sleep20-21swapper/22
171150499158,4cyclictest1723750-21chrt3
1711504991512,2cyclictest0-21swapper/33
1711504991512,1cyclictest0-21swapper/33
171150499150,13cyclictest0-21swapper/33
171150499150,12cyclictest0-21swapper/33
171150499150,12cyclictest0-21swapper/33
171150499150,12cyclictest0-21swapper/33
21504262145,6sleep2431ktimers/22
21130692141,2sleep21842393-21diskmemload2
21009902142,5sleep12101049-21ntpq1
20953142141,8sleep11842393-21diskmemload1
20945952140,3sleep01842393-21diskmemload0
20864892141,7sleep11842393-21diskmemload1
20592552141,9sleep22059269-21ssh2
20172412140,2sleep20-21swapper/22
20077432141,8sleep11842393-21diskmemload1
19747032141,8sleep01976141-21cut0
19653222141,5sleep11965516-21expr1
19619092141,3sleep01961921-21ssh0
19035952141,9sleep21903774-21cut2
18929382140,11sleep01892952-21ssh0
18673392141,4sleep01867351-21ssh0
18593772141,4sleep21859388-21ssh2
18570662141,7sleep11842393-21diskmemload1
18366342140,1sleep20-21swapper/22
18157032141,3sleep21815722-21apt-get2
1711504991412,1cyclictest0-21swapper/33
171150499140,12cyclictest0-21swapper/33
21630552131,6sleep12163114-21ntpq1
21240182131,4sleep22125276-21ssh2
20700842131,8sleep02070097-21rm0
20259922131,4sleep02026006-21ssh0
18855452131,8sleep01885559-21ssh0
18473112131,7sleep21847569-21grep2
171150499131,8cyclictest1746969-21taskset3
171150499131,1cyclictest0-21swapper/33
171150499130,12cyclictest0-21swapper/33
21559692121,7sleep12155980-21ssh1
21397742121,6sleep02139788-21ssh0
21396312121,6sleep11842393-21diskmemload1
21341142121,7sleep22135845-21tr2
21295482120,3sleep12129559-21ssh1
20972072121,7sleep02097425-21hddtemp_smartct0
20923402121,3sleep20-21swapper/22
20801322121,7sleep02081715-21tr0
20705022121,4sleep00-21swapper/00
20695522121,7sleep22069565-21ssh2
20594362121,7sleep02059450-21ssh0
20274772121,7sleep22027932-21kthreadcore2
20254382121,7sleep11842393-21diskmemload1
20222752121,7sleep22022335-21ntpq2
19985272121,5sleep10-21swapper/11
18747062121,5sleep00-21swapper/00
18607382121,7sleep21860842-21cut2
18423252120,3sleep2255-21systemd-journal2
17249352121,7sleep01725583-21cut0
22003032110,3sleep12200314-21ssh1
21893882111,5sleep02189445-21ntpq0
21819142111,3sleep00-21swapper/00
21813922111,3sleep20-21swapper/22
21733812111,3sleep10-21swapper/11
21669202111,3sleep00-21swapper/00
21462972111,3sleep10-21swapper/11
21452352111,5sleep02145294-21ntpq0
21287702111,3sleep00-21swapper/00
21206462111,3sleep00-21swapper/00
21126292110,7sleep02112643-21ssh0
21049712111,3sleep20-21swapper/22
20779142111,6sleep12077929-21ssh1
20671022111,4sleep11842393-21diskmemload1
20516082111,4sleep00-21swapper/00
20358962111,4sleep22036114-21hddtemp_smartct2
20327422110,3sleep10-21swapper/11
20080022111,4sleep21842393-21diskmemload2
19821292111,4sleep21842393-21diskmemload2
19818682111,3sleep10-21swapper/11
19554382111,3sleep00-21swapper/00
19463032111,3sleep20-21swapper/22
19292592111,4sleep21842393-21diskmemload2
19283342111,4sleep11842393-21diskmemload1
19226982111,2sleep01924313-21ssh0
19095442111,4sleep21842393-21diskmemload2
19021242111,7sleep11842393-21diskmemload1
18918062111,4sleep21842393-21diskmemload2
18915912111,4sleep11842393-21diskmemload1
18831852111,4sleep11842393-21diskmemload1
18744052111,4sleep11842393-21diskmemload1
18656652111,5sleep11842393-21diskmemload1
18304782111,5sleep21830531-21ntp_states2
18263842111,5sleep11826643-21df_inode1
18210322111,4sleep11821051-21apt-get1
18041322111,6sleep11804372-21grep1
17930152111,5sleep01793156-21ntpq0
17769612111,5sleep21777018-21ntp_states2
17610192111,3sleep10-21swapper/11
22093272101,3sleep20-21swapper/22
21999602101,4sleep21842393-21diskmemload2
21920562101,4sleep21842393-21diskmemload2
21648732101,5sleep22164888-21ssh2
21537462101,5sleep02153923-21cut0
21227442101,4sleep21842393-21diskmemload2
21135062101,2sleep10-21swapper/11
20764032100,2sleep22076418-21ssh2
20599472101,3sleep11842393-21diskmemload1
20442852101,2sleep10-21swapper/11
20377402101,3sleep12039513-21cut1
20345532101,3sleep072-21kcompactd00
20161592101,3sleep11842393-21diskmemload1
20094012101,3sleep02009425-21apt-get0
19975442101,5sleep01997558-21ssh0
19870842100,4sleep11987149-21ntpq1
19646772101,4sleep11842393-21diskmemload1
19635182101,4sleep21842393-21diskmemload2
19534822100,1sleep20-21swapper/22
19480902101,4sleep11948313-21hddtemp_smartct1
19390662101,4sleep01939094-21apt-get0
19360522101,3sleep20-21swapper/22
19185472101,2sleep20-21swapper/22
19106382101,3sleep00-21swapper/00
19104492101,3sleep11842393-21diskmemload1
18955782101,4sleep01895799-21hddtemp_smartct0
18852602101,2sleep20-21swapper/22
18566932101,4sleep01856707-21ssh0
18358282101,4sleep11835881-21ntp_states1
18303682101,5sleep01830416-21ntpq0
18154432101,4sleep21815467-21munin-run2
17944352101,4sleep21794454-21apt-get2
17931572101,5sleep11793203-21ntpq1
17458012101,3sleep272-21kcompactd02
17457302101,5sleep11745604-31frcode1
17362082101,5sleep01737909-21kthreadcore0
17160882101,5sleep11716336-21unixbench_multi1
2194470291,2sleep01842393-21diskmemload0
2190482291,3sleep11842393-21diskmemload1
2176729291,4sleep12176951-21ssh1
2172207291,4sleep22172275-21sed2
2146012290,1sleep20-21swapper/22
2049039291,4sleep22049266-21users2
2008381291,2sleep00-21swapper/00
1965286291,2sleep00-21swapper/00
1918367291,4sleep01918379-21ssh0
1870109291,4sleep21871749-21grep2
1848490291,4sleep01848500-21ssh0
1814517291,4sleep01814569-21/usr/sbin/munin0
1808982291,3sleep11809095-21ntpq1
1805046291,2sleep20-21swapper/22
1798574291,4sleep11798685-21ps1
1787837291,3sleep01787887-21ntpq0
1778445292,3sleep01778464-21apt-get0
1771600290,4sleep21771649-21ntpq2
1755653291,4sleep21755708-21ld2
1751120290,1sleep00-21swapper/00
1730284291,4sleep21731426-21grep2
1723052291,4sleep21723106-21ld2
1716773291,4sleep01716792-21munin-run0
2039779281,2sleep02039831-21ntpq0
1837300280,3sleep11837319-21apt-get1
1776859281,3sleep01776907-21ntpq0
1773412281,4sleep11774858-21tr1
1766567281,3sleep01766749-21sed0
1756909281,3sleep01757129-21cstates0
1825231271,2sleep01825354-21mailstats0
1815244270,1sleep10-21swapper/11
1804095270,4sleep00-21swapper/00
1794433270,1sleep00-21swapper/00
1793850270,1sleep20-21swapper/22
1788541270,4sleep20-21swapper/22
1783784270,1sleep10-21swapper/11
1782553271,3sleep10-21swapper/11
1762213270,2sleep20-21swapper/22
1761748270,1sleep20-21swapper/22
1756133270,2sleep00-21swapper/00
1746726271,3sleep21746968-21grep2
1745699270,2sleep00-21swapper/00
1740326270,1sleep20-21swapper/22
1734756270,1sleep10-21swapper/11
1734455270,1sleep00-21swapper/00
1724381270,1sleep10-21swapper/11
1719025270,1sleep10-21swapper/11
1716622270,1sleep20-21swapper/22
1832637261,2sleep01834261-21kthreadcore0
1810086260,4sleep00-21swapper/00
1804486260,1sleep20-21swapper/22
1783230260,4sleep20-21swapper/22
1772226260,1sleep00-21swapper/00
1767541260,2sleep10-21swapper/11
1751560261,1sleep10-21swapper/11
1751116260,1sleep10-21swapper/11
1740172260,1sleep10-21swapper/11
1729228260,1sleep20-21swapper/22
1837241250,1sleep00-21swapper/00
1820664250,3sleep00-21swapper/00
1761997250,1sleep10-21swapper/11
1719198250,1sleep00-21swapper/00
1815697240,1sleep10-21swapper/11
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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