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2025-04-23 - 06:34

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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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.

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 792 highest latencies:
System rack4slot6s.osadl.org (updated Wed Apr 23, 2025 00:44:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1902922440,2sleep019030-21latency_hist23:45:000
2436721480,2sleep024368-21cut00:10:020
16651214521,32sleep016679-21ntp_states19:05:220
299021380,3chrt2987-21ntpq20:20:230
3049021320,3chrt30491-21latency00:35:180
1073321320,3sleep010737-21tr20:50:220
274421300,4chrt2745-21cut22:35:020
1205321290,3chrt12054-21ntp_states20:55:250
2699421190,2sleep026995-21latency_hist00:20:020
426821010,4sleep04287-21/usr/sbin/munin22:40:220
187712990,3sleep018843-21/usr/sbin/munin21:20:320
65212880,3sleep06524-21fgrep22:50:300
13912888,68sleep01417-21latency_hist22:30:000
14932734,58sleep01543-21interrupts20:15:180
58332715,55sleep05877-21users20:30:310
294522703,5sleep00-21swapper22:10:100
132792680,2sleep013281-21ls21:00:180
1759299647,16cyclictest11974-21/usr/sbin/munin23:15:270
1759299609,16cyclictest16927-21sshd21:15:120
1759299607,18cyclictest32001-21/usr/sbin/munin22:20:160
17592996028,23cyclictest10761-21/usr/sbin/munin23:10:140
1759299599,15cyclictest30685-21/usr/sbin/munin22:15:230
17592995923,22cyclictest19025-21df19:15:120
17592995911,18cyclictest30322-21ntpq20:00:270
17592995910,16cyclictest27998-21chrt22:00:280
1759299589,17cyclictest26434-21ntp_states19:45:230
1759299589,17cyclictest10631-21latency_hist23:10:020
1759299589,16cyclictest4001-21/usr/sbin/munin20:25:170
1759299589,16cyclictest31305-21/usr/sbin/munin20:05:200
1759299587,17cyclictest22819-21/usr/sbin/munin21:40:240
1759299587,15cyclictest27193-21/usr/sbin/munin00:20:170
1759299586,17cyclictest28712-21/usr/sbin/munin19:55:160
17592995813,16cyclictest664-21timerandwakeup20:10:320
17592995810,16cyclictest7441-21df22:55:130
143972583,5sleep00-21swapper23:24:420
1759299579,16cyclictest9200-21/usr/sbin/munin20:45:260
1759299579,15cyclictest26577-21/usr/sbin/munin21:55:280
1759299579,15cyclictest20293-21/usr/sbin/munin19:20:310
1759299578,16cyclictest20272-21egrep21:30:080
1759299577,14cyclictest2870-21df22:35:160
17592995735,14cyclictest16120-21/usr/sbin/munin21:10:280
17592995734,15cyclictest14793-21/usr/sbin/munin21:05:270
17592995732,16cyclictest21764-21/usr/sbin/munin21:35:190
17592995729,17cyclictest21781-21runrttasks19:27:000
1759299569,14cyclictest29028-21/usr/sbin/munin00:30:160
1759299568,16cyclictest25148-21ntpq19:40:200
1759299567,17cyclictest27437-21/usr/sbin/munin19:50:340
1759299566,18cyclictest6567-21/usr/sbin/munin20:35:160
17592995633,15cyclictest22550-21/usr/sbin/munin19:30:160
17592995633,14cyclictest18174-21/usr/sbin/munin19:10:300
17592995632,15cyclictest8365-21/usr/sbin/munin20:40:300
17592995610,16cyclictest17060-21/usr/sbin/munin23:35:270
17592995610,16cyclictest15565-21ntp_states23:30:210
17592995610,15cyclictest8899-21grep23:00:210
1759299558,17cyclictest21584-21/usr/sbin/munin23:55:270
1759299558,15cyclictest20001-21irqstats23:50:140
1759299558,14cyclictest24503-21df_inode00:10:090
17592995533,14cyclictest24806-21/usr/sbin/munin21:50:070
17592995511,16cyclictest23012-21grep00:00:310
17592995510,16cyclictest5987-21munin-run22:50:000
17592995410,16cyclictest29281-21awk22:10:010
17592995410,16cyclictest24715-21cat21:50:020
1759299538,17cyclictest23705-21irqstats19:35:200
1759299538,17cyclictest19720-21chrt21:26:480
1759299529,16cyclictest14929-21sshd23:28:140
17592995129,14cyclictest19671-21runrttasks23:49:310
1759299506,14cyclictest28331-21sshd00:25:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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