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2026-07-05 - 03:26

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 Sun Jul 05, 2026 00:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
690822710,3sleep06907-21wc21:10:290
535521350,4chrt5070-21/usr/sbin/munin21:05:190
177921240,4chrt1777-21users20:50:290
509521210,3chrt5098-21sed23:10:170
7726991209,95cyclictest30904-21/usr/sbin/munin22:45:130
262021200,3chrt2618-21irqstats20:55:180
1256621180,3chrt12568-21latency_hist23:40:020
7726991148,90cyclictest30039-21systemctl22:40:260
2325321140,3chrt23254-21cat22:15:160
7726991129,89cyclictest27289-21ntpq22:30:210
77269911231,71cyclictest18318-21/usr/sbin/munin19:50:180
77269911230,71cyclictest29880-21/usr/sbin/munin20:35:150
77269911229,70cyclictest3698-21/usr/sbin/munin23:05:150
77269911211,87cyclictest21032-21ntp_states20:00:220
7726991118,89cyclictest32250-21df_inode22:50:140
7726991109,87cyclictest14466-21memory19:35:170
7726991109,86cyclictest15652-21df_inode19:40:130
7726991108,88cyclictest7582-21ls23:20:140
7726991107,90cyclictest15476-21df_inode21:45:130
77269911024,72cyclictest14000-21df_inode23:45:140
7726991098,89cyclictest18060-21latency_hist19:50:010
7726991098,88cyclictest9395-21ntp_states19:15:220
7726991098,88cyclictest23912-21users20:10:300
7726991098,87cyclictest25985-21df_inode20:20:130
7726991097,90cyclictest16698-21egrep21:50:090
7726991097,88cyclictest14423-21ntp_states21:40:260
7726991097,87cyclictest7706-21df21:15:130
7726991097,87cyclictest26820-21date00:35:020
7726991096,90cyclictest26971-21latency_hist22:30:020
77269910929,67cyclictest20799-21/usr/sbin/munin00:10:250
7726991089,87cyclictest25522-21chrt00:30:010
7726991089,86cyclictest29087-21chrt22:36:540
7726991087,88cyclictest11537-21/usr/sbin/munin21:30:180
77269910832,65cyclictest18357-21/usr/sbin/munin00:00:300
7726991078,88cyclictest16792-21ntp_states23:55:220
7726991078,84cyclictest8971-21/usr/sbin/munin21:20:160
7726991078,84cyclictest7417-21latency_hist23:20:010
7726991077,87cyclictest1162-21cat22:55:170
7726991077,86cyclictest24602-21/usr/sbin/munin20:15:210
7726991077,85cyclictest20659-21/usr/sbin/munin22:05:140
7726991076,88cyclictest4985-21wc21:05:010
7726991076,87cyclictest32271-21date20:45:010
77269910730,65cyclictest22142-21/usr/sbin/munin20:05:140
77269910726,70cyclictest11235-21runrttasks23:35:000
7726991068,86cyclictest13373-21cat21:35:290
7726991068,85cyclictest15413-21memory23:50:170
7726991068,84cyclictest13142-21irqstats19:30:170
7726991067,86cyclictest23065-21/usr/sbin/munin00:20:140
7726991067,86cyclictest21650-21date00:15:010
7726991066,87cyclictest13521-21seq23:42:370
77269910630,66cyclictest3267-21runrttasks23:03:150
77269910627,69cyclictest1-21systemd19:25:010
77269910627,68cyclictest29549-21runrttasks20:34:170
77269910624,70cyclictest9184-21/usr/sbin/munin23:25:260
7726991059,83cyclictest20505-21latency_hist22:05:010
7726991058,85cyclictest18057-21seq21:55:140
7726991058,84cyclictest22153-21ntp_states22:10:210
7726991057,85cyclictest27394-21memory20:25:180
7726991057,83cyclictest12392-21runrttasks19:26:060
7726991056,85cyclictest20031-21users19:55:290
77269910523,69cyclictest8216-21/usr/sbin/munin19:10:230
7726991049,82cyclictest10348-21cat21:25:130
7726991048,84cyclictest28092-21cat00:40:010
7726991047,84cyclictest32363-21/usr/sbin/munin20:45:140
77269910421,72cyclictest19108-21/usr/sbin/munin00:05:180
7726991037,85cyclictest24755-21ntp_states22:20:210
772699936,75cyclictest7794-21cat19:10:030
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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