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2026-09-05 - 19:29

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, 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.
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 rack8slot4s.osadl.org (updated Fri Sep 04, 2026 12:44:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4787942271185,25sleep40-21swapper/407:05:564
4788762248175,22sleep30-21swapper/307:07:083
4790182244176,21sleep50-21swapper/507:09:115
4788802244171,22sleep70-21swapper/707:07:127
4788002244174,22sleep10-21swapper/107:06:011
4789622243180,51sleep60-21swapper/607:08:246
4790332220164,45sleep20-21swapper/207:09:242
4790042207173,23sleep00-21swapper/007:08:580
47929599270,2cyclictest81-21ksoftirqd/612:25:136
47929599260,24cyclictest521286-21awk08:20:016
47929199250,24cyclictest626347-21sh11:15:175
47929199250,24cyclictest530178-21sleep08:35:025
47928499250,24cyclictest596778-21ntpq10:25:192
47927899250,24cyclictest610032-21sed10:50:010
47927899250,24cyclictest610032-21sed10:50:010
479296992423,1cyclictest576120-21ntpq09:50:207
479295992420,3cyclictest615676-21apt-get11:00:016
47929599240,3cyclictest659900-21idleruntime-cro12:15:016
47929599240,3cyclictest487610-21ntpq07:20:186
47929599240,23cyclictest81-21ksoftirqd/608:30:136
479291992423,1cyclictest554180-21apt-get09:15:115
47929199240,23cyclictest0-21swapper/508:45:025
479289992423,1cyclictest509903-21apt-get08:00:134
47928999240,24cyclictest629203-21ntpq11:20:204
47928999240,23cyclictest616141-21apt-get11:00:124
47928999240,23cyclictest606790-21sh10:45:014
47928699240,23cyclictest636328-21munin-run11:35:013
47928499240,0cyclictest0-21swapper/207:20:132
47928199240,23cyclictest609809-21appstreamcli10:50:031
47928199240,23cyclictest609809-21appstreamcli10:50:031
47928199240,23cyclictest0-21swapper/109:25:181
47927899240,1cyclictest662815-21apt-get12:19:100
47927899240,0cyclictest0-21swapper/009:00:110
479295992322,1cyclictest0-21swapper/610:50:226
479295992322,1cyclictest0-21swapper/610:50:226
479295992321,1cyclictest0-21swapper/612:19:116
479295992320,3cyclictest480890-21ntpq07:10:186
47929599230,22cyclictest81-21ksoftirqd/610:10:176
47929599230,22cyclictest629261-21ntpq11:20:206
47929599230,22cyclictest562605-21munin-run09:30:016
47929599230,22cyclictest497729-21appstreamcli07:40:026
47929599230,22cyclictest0-21swapper/609:15:116
47929599230,22cyclictest0-21swapper/609:00:016
47929599230,22cyclictest0-21swapper/608:25:136
479291992321,1cyclictest662836-21dpkg-deb12:19:115
479291992321,1cyclictest550793-21cron09:10:015
479291992321,1cyclictest0-21swapper/511:10:015
47929199230,22cyclictest536524-21apt-get08:45:135
47929199230,22cyclictest0-21swapper/511:20:215
47929199230,0cyclictest0-21swapper/511:00:125
479289992319,3cyclictest600912-21basename10:35:014
479289992312,10cyclictest0-21swapper/408:05:134
47928999230,22cyclictest0-21swapper/410:25:124
479286992323,0cyclictest0-21swapper/311:00:123
479286992322,1cyclictest604292-21apt-get10:40:133
479286992322,1cyclictest571869-21apt-get09:45:123
47928699230,23cyclictest0-21swapper/310:25:193
47928699230,22cyclictest486285-21apt-get07:20:123
47928699230,22cyclictest0-21swapper/312:19:093
47928699230,22cyclictest0-21swapper/312:00:213
47928699230,22cyclictest0-21swapper/309:30:113
47928699230,22cyclictest0-21swapper/307:35:113
479284992323,0cyclictest0-21swapper/212:05:182
479284992319,3cyclictest497638-21latency_hist07:40:012
47928499230,23cyclictest0-21swapper/210:05:162
47928499230,22cyclictest609979-21cut10:50:012
47928499230,22cyclictest609979-21cut10:50:012
47928499230,22cyclictest518531-21latency_hist08:15:022
47928499230,22cyclictest506526-21awk07:55:012
47928499230,22cyclictest0-21swapper/212:25:042
47928499230,22cyclictest0-21swapper/209:05:132
47928499230,1cyclictest620408-21ntpq11:05:182
47928499230,1cyclictest0-21swapper/209:35:112
479281992322,1cyclictest1-21systemd12:20:011
479281992318,4cyclictest565545-21munin-run09:35:011
47928199230,23cyclictest0-21swapper/111:50:211
47928199230,22cyclictest497650-21munin-run07:40:011
47928199230,22cyclictest0-21swapper/112:10:121
47928199230,22cyclictest0-21swapper/111:35:131
47928199230,22cyclictest0-21swapper/111:15:101
47928199230,1cyclictest0-21swapper/110:45:121
47928199230,1cyclictest0-21swapper/110:45:121
479278992323,0cyclictest0-21swapper/008:45:050
479278992323,0cyclictest0-21swapper/007:25:130
47927899230,3cyclictest646910-21ntpq11:50:210
47927899230,23cyclictest597967-21perf10:30:010
47927899230,22cyclictest509903-21apt-get08:00:130
47927899230,1cyclictest612721-21idleruntime-cro10:55:010
47927899230,1cyclictest612721-21idleruntime-cro10:55:010
479296992221,1cyclictest630870-21apt-get11:25:127
479296992221,1cyclictest546670-21ntpq09:00:177
47929699220,2cyclictest577758-21apt-get09:55:127
47929699220,22cyclictest627928-21apt-get11:20:147
47929699220,22cyclictest548303-21apt-get09:05:137
47929699220,22cyclictest0-21swapper/709:30:117
47929699220,21cyclictest0-21swapper/711:45:127
47929699220,21cyclictest0-21swapper/707:40:137
47929699220,1cyclictest662837-21dpkg-deb12:19:107
479295992221,1cyclictest81-21ksoftirqd/611:40:206
479295992220,1cyclictest671915-21turbostat12:35:016
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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