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2026-03-15 - 04:21

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 all highest latencies:
System rack4slot6s.osadl.org (updated Sun Mar 15, 2026 00:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2114622720,3sleep021143-21cat20:25:270
2701622480,3sleep027013-21grep20:50:020
2871921280,4chrt28222-21/usr/sbin/munin23:00:270
311621250,3chrt3117-21sshd21:21:190
11649912531,16cyclictest20117-21runrttasks00:34:410
1656821220,3chrt16567-21/usr/sbin/munin00:20:150
11649912128,16cyclictest23261-21/usr/sbin/munin20:35:110
11649911931,16cyclictest3523-21runrttasks19:18:290
11649911728,15cyclictest15216-21runrttasks20:03:590
11649911727,14cyclictest25614-21runrttasks20:44:330
11649911724,15cyclictest27083-21munin-node20:50:100
11649911625,15cyclictest17235-21runrttasks22:15:510
11649911625,14cyclictest32406-21/usr/sbin/munin21:10:160
3214021150,4sleep032144-21df_inode23:15:160
11649911531,72cyclictest1471-21/usr/sbin/munin19:10:190
11649911526,15cyclictest20138-21runrttasks22:28:210
2307321140,3sleep023089-21munin-run20:35:000
11649911419,16cyclictest14309-21ntpq22:05:210
2352921130,4chrt23530-21/usr/sbin/munin22:40:240
11649911327,12cyclictest9661-21runrttasks21:47:100
11649911323,13cyclictest8246-21runrttasks23:47:350
1164991128,29cyclictest10209-21/usr/sbin/munin23:55:200
11649911227,14cyclictest17100-21/usr/sbin/munin20:10:250
1164991119,18cyclictest2045-21sshd21:18:180
11649911133,68cyclictest13857-21runrttasks19:58:370
11649911125,14cyclictest18789-21runrttasks00:29:200
11649911124,16cyclictest21482-21runrttasks22:33:510
11649911123,15cyclictest18160-21if_eth020:15:150
11649911123,15cyclictest11148-21sshd19:47:250
11649911122,16cyclictest15583-21runrttasks22:10:190
11649911119,13cyclictest4340-21runrttasks23:32:210
11649911110,20cyclictest29767-21ntpq23:05:190
1164991109,29cyclictest288-21snmpd19:40:160
1164991109,16cyclictest12747-21sshd00:05:190
1164991108,18cyclictest5743-21seq19:25:290
11649911029,13cyclictest31991-21latency_hist23:15:020
11649911025,13cyclictest8477-21runrttasks19:36:470
11649911024,15cyclictest8819-21latency_hist21:45:020
621121090,4chrt6212-21if_err_eth023:40:160
1164991098,20cyclictest11418-21/usr/sbin/munin21:55:310
11649910911,18cyclictest9119-21readlink23:50:260
1164991089,20cyclictest26955-21df22:55:090
1164991089,18cyclictest11525-21ntpq00:00:200
1164991089,17cyclictest3923-21df_inode19:20:130
11649910828,15cyclictest22677-21runrttasks22:38:090
11649910823,13cyclictest11115-21runrttasks21:53:360
11649910823,11cyclictest19949-21chrt20:20:270
11649910822,14cyclictest30241-21timerwakeupswit21:00:280
11649910821,14cyclictest15736-21runrttasks20:05:180
11649910811,19cyclictest31157-21memory21:05:180
11649910810,18cyclictest288-21snmpd19:50:200
11649910810,16cyclictest20552-21awk00:35:190
1164991079,19cyclictest5966-21munin-run23:40:000
11649910728,12cyclictest7083-21sshd21:37:190
11649910723,16cyclictest25126-21runrttasks22:46:570
11649910723,15cyclictest2334-21if_err_eth023:25:140
11649910721,14cyclictest18917-21runrttasks22:23:520
11649910719,13cyclictest7500-21sshd19:34:200
11649910715,15cyclictest15706-21/usr/sbin/munin00:15:290
1164991069,16cyclictest3989-21/usr/sbin/munin21:25:230
11649910628,14cyclictest5710-21runrttasks21:31:340
11649910621,12cyclictest1892-21sshd23:23:200
11649910611,18cyclictest26787-21latency_hist22:55:010
11649910522,14cyclictest28366-21/usr/sbin/munin20:55:280
1164991039,18cyclictest13917-21/usr/sbin/munin00:10:140
11649910311,16cyclictest12811-21fw_packets22:00:150
3256927219,31sleep032608-21memory19:05:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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