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2026-07-02 - 10:04

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #6

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.

Total number of samples: 50 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the highest latencies:
System rack4slot6s.osadl.org (updated Thu Jul 02, 2026 00:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2780822600,2sleep027807-21sort00:30:170
2279622490,3sleep022797-21cat22:05:170
2106522400,3sleep021062-21ls00:05:010
1402221340,3sleep014021-21ntp_kernel_pll_19:25:200
3176621260,4chrt31767-21latency_hist20:35:020
1862121150,3chrt18619-21entropy23:55:150
3032221140,3chrt30324-21latency_hist22:35:020
2413821090,3sleep024144-21df_inode20:05:130
1392921040,3sleep013933-21timerandwakeup23:35:270
2825621030,3sleep028260-21ntp_states20:20:220
2284721010,4sleep022437-21/usr/sbin/munin00:10:280
266502990,3sleep026658-21cpu20:15:120
237132960,3sleep023720-21grep00:15:100
121072900,3sleep012142-21cpu23:30:110
321442874,10sleep032216-21timerwakeupswit22:40:270
42062840,4sleep04208-21sshd20:53:340
173212840,3sleep017330-21cron21:44:590
61522795,60sleep06221-21awk21:00:250
149182783,5sleep00-21swapper21:35:140
187432750,2sleep018744-21egrep21:50:120
888027419,31sleep08962-21/usr/sbin/munin19:05:210
258932693,5sleep00-21swapper00:22:350
213192693,5sleep00-21swapper22:00:050
164122670,3sleep016415-21cut23:45:250
9731996533,23cyclictest18525-21latency_hist23:55:020
94892650,2sleep09484-21latency_hist23:20:020
9731996311,18cyclictest16138-21sshd19:34:340
93252633,5sleep00-21swapper21:13:050
9731996132,19cyclictest11117-21/usr/sbin/munin23:25:210
973199609,16cyclictest22845-21df20:00:120
973199608,19cyclictest21158-21/usr/sbin/munin00:05:320
9731995934,15cyclictest10176-21/usr/sbin/munin21:15:280
9731995930,18cyclictest7323-21/usr/sbin/munin21:05:180
9731995917,14cyclictest276-21runrttasks23:40:210
9731995912,16cyclictest4575-21/usr/sbin/munin23:00:200
9731995911,16cyclictest13641-21/usr/sbin/munin21:30:120
9731995910,16cyclictest16622-21/usr/sbin/munin19:35:230
973199589,16cyclictest1770-21/usr/sbin/munin22:50:150
973199587,14cyclictest4516-21/usr/sbin/munin20:55:190
9731995833,16cyclictest27030-21runrttasks00:26:220
9731995811,16cyclictest30681-21/usr/sbin/munin22:35:240
973199579,18cyclictest727-21/usr/sbin/munin22:45:200
973199578,23cyclictest6819-21munin-run23:10:000
973199578,17cyclictest32251-21grep20:35:260
973199578,15cyclictest20201-21/usr/sbin/munin19:50:150
9731995731,15cyclictest3116-21/usr/sbin/munin22:55:130
9731995711,15cyclictest22657-21munin-run20:00:010
973199569,16cyclictest1951-21/usr/sbin/munin20:45:190
973199569,16cyclictest12338-21munin-run19:20:000
9731995633,14cyclictest25301-21/usr/sbin/munin22:15:150
9731995632,16cyclictest30135-21runrttasks20:27:470
9731995631,17cyclictest9832-21/usr/sbin/munin23:20:220
9731995631,15cyclictest23992-21/usr/sbin/munin22:10:140
9731995630,16cyclictest13193-21runrttasks19:21:230
9731995615,15cyclictest12227-21latency_hist21:25:020
9731995610,17cyclictest30063-21munin-run00:40:010
9731995610,13cyclictest26506-21/usr/sbin/munin22:20:270
973199559,18cyclictest21192-21awk22:00:000
973199559,17cyclictest7081-21irqstats23:10:160
973199558,14cyclictest662-21/usr/sbin/munin20:40:160
973199557,16cyclictest11060-21grep19:15:020
9731995532,14cyclictest25429-21/usr/sbin/munin20:10:120
9731995531,16cyclictest27936-21irqstats22:25:160
9731995510,18cyclictest12826-21cat21:25:280
9731995510,17cyclictest17728-21grep21:45:200
973199549,15cyclictest276-21runrttasks19:44:100
973199547,14cyclictest19253-21chrt19:45:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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