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2025-12-26 - 11:32

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 highest latencies:
System rack4slot6s.osadl.org (updated Fri Dec 26, 2025 00:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1073922550,3sleep010737-21grep20:35:190
1593022480,2sleep015933-21proc_pri23:00:250
2859922410,2sleep028600-21latency_hist21:45:010
2367421210,3chrt23673-21/usr/sbin/munin21:25:190
2096521140,4chrt20966-21/usr/sbin/munin23:20:190
2887621120,3chrt28875-21/usr/sbin/munin21:45:190
2612721120,3sleep026184-21/usr/sbin/munin23:40:200
1361121040,4chrt13612-21mailstats20:45:290
3002921000,3sleep030059-21grep23:55:200
323002957,13sleep032301-21sshd19:52:470
273922875,10sleep027407-21memory23:45:180
172532875,65sleep017309-21ntpq21:00:200
243012804,8sleep023693-21/usr/sbin/munin19:20:300
2094027921,33sleep020964-21munin-run19:10:000
210692750,3sleep021091-21wc21:15:210
212782713,5sleep00-21swapper19:10:190
2098899688,26cyclictest10260-21sshd20:33:290
20988996726,14cyclictest946-21ntpd22:25:210
17002660,3sleep01701-21uname20:00:170
20988996135,17cyclictest14852-21/usr/sbin/munin20:50:250
20988996135,16cyclictest4115-21/usr/sbin/munin00:20:240
20988996035,16cyclictest10681-21/usr/sbin/munin22:40:170
20988996010,17cyclictest30028-21df_inode21:50:150
2098899599,18cyclictest24625-21/usr/sbin/munin23:35:290
2098899599,16cyclictest5709-21ntp_states20:15:260
2098899598,19cyclictest4413-21seq20:10:220
20988995936,16cyclictest13601-21/usr/sbin/munin22:50:310
2098899589,16cyclictest6518-21/usr/sbin/munin00:30:150
2098899588,19cyclictest18339-21/usr/sbin/munin21:05:280
2098899588,18cyclictest30135-21/usr/sbin/munin19:45:240
2098899588,16cyclictest2673-21/usr/sbin/munin22:10:320
20988995835,15cyclictest1448-21/usr/sbin/munin22:05:130
20988995834,15cyclictest8169-21/usr/sbin/munin22:30:240
20988995833,17cyclictest14512-21/usr/sbin/munin22:55:220
20988995832,16cyclictest28693-21/usr/sbin/munin23:50:210
20988995821,14cyclictest25972-21awk21:35:000
20988995810,17cyclictest3100-21/usr/sbin/munin20:05:190
20988995810,14cyclictest31376-21ntp_states00:00:220
2098899579,16cyclictest8013-21/usr/sbin/munin20:25:280
2098899579,15cyclictest6813-21fw_packets20:20:150
2098899578,18cyclictest32642-21runrttasks22:00:150
2098899578,17cyclictest7716-21df00:35:140
2098899578,15cyclictest22060-21/usr/sbin/munin23:25:290
2098899577,17cyclictest2492-21/usr/sbin/munin00:15:150
2098899577,15cyclictest26259-21/usr/sbin/munin19:30:100
20988995734,14cyclictest17133-21/usr/sbin/munin23:05:200
20988995734,14cyclictest11972-21/usr/sbin/munin20:40:150
20988995733,15cyclictest22539-21/usr/sbin/munin19:15:180
20988995731,18cyclictest11969-21runrttasks22:45:210
20988995731,15cyclictest32394-21/usr/sbin/munin00:05:160
20988995730,18cyclictest0-21swapper21:10:330
20988995711,17cyclictest9407-21ntpq22:35:210
2098899569,15cyclictest18234-21df_inode23:10:160
2098899569,14cyclictest28856-21/usr/sbin/munin19:40:160
2098899568,16cyclictest5095-21/usr/sbin/munin00:25:130
2098899568,14cyclictest3959-21/usr/sbin/munin22:15:200
2098899568,14cyclictest27545-21/usr/sbin/munin19:35:310
2098899567,15cyclictest23346-21/usr/sbin/munin23:30:170
20988995610,14cyclictest5276-21/usr/sbin/munin22:20:280
2098899557,17cyclictest32699-21/usr/sbin/munin19:55:180
2098899557,17cyclictest288-21snmpd21:37:200
2098899557,16cyclictest22242-21/usr/sbin/munin21:20:200
20988995531,16cyclictest16433-21runrttasks20:56:150
20988995528,15cyclictest1284-21/usr/sbin/munin00:10:170
2098899548,14cyclictest25515-21wc19:25:280
2098899548,13cyclictest31249-21/usr/sbin/munin21:55:250
20988995310,16cyclictest19695-21/usr/sbin/munin23:15:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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