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2026-07-02 - 16:17

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 100 highest latencies:
System rack4slot6s.osadl.org (updated Thu Jul 02, 2026 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2629522530,3sleep026291-21systemctl08:00:000
2615521370,2sleep026156-21latency_hist10:05:010
2852921310,4chrt28530-21run-parts12:20:000
13413991149,92cyclictest32349-21seq10:28:090
134139911233,69cyclictest29181-21/usr/sbin/munin12:20:270
13413991118,73cyclictest7198-21pluginstate08:50:240
134139911122,78cyclictest18677-21/usr/sbin/munin07:30:130
134139911116,83cyclictest30080-21date10:20:010
134139911110,86cyclictest32578-21df_inode12:35:130
13413991109,88cyclictest24847-21df_inode12:05:130
13413991108,89cyclictest16302-21memory07:20:170
13413991099,87cyclictest18097-21runrttasks11:39:220
13413991099,86cyclictest2905-21/usr/sbin/munin10:40:130
134139910933,66cyclictest5696-21/usr/sbin/munin08:45:140
134139910933,65cyclictest9567-21/usr/sbin/munin11:05:190
134139910926,73cyclictest30602-21runrttasks10:20:250
134139910910,85cyclictest5461-21df10:50:140
13413991089,88cyclictest14940-21ntp_states09:20:220
13413991089,87cyclictest17993-21vmstat07:25:290
13413991088,86cyclictest12735-21seq11:17:410
13413991087,88cyclictest28164-21cat08:05:250
134139910827,70cyclictest1-21systemd07:11:010
134139910817,80cyclictest285-21sshd11:55:350
13413991077,86cyclictest9609-21/usr/sbin/munin09:00:170
13413991077,86cyclictest481-21/usr/sbin/munin08:25:130
134139910730,66cyclictest31046-21sshd12:29:340
134139910728,68cyclictest1-21systemd10:35:010
134139910727,60cyclictest19574-21runrttasks09:39:250
134139910714,82cyclictest15207-21awk07:15:250
134139910710,83cyclictest30346-21df_inode08:15:130
13413991069,84cyclictest19959-21/usr/sbin/munin07:35:090
13413991069,82cyclictest22324-21ls09:50:010
13413991068,86cyclictest23901-21/usr/sbin/munin07:50:140
13413991068,86cyclictest10859-21ntp_states11:10:210
13413991067,86cyclictest26507-21/usr/sbin/munin12:10:250
13413991067,86cyclictest23576-21awk12:00:130
13413991067,74cyclictest276-21runrttasks09:41:530
134139910629,66cyclictest18224-21runrttasks09:33:510
134139910628,68cyclictest5172-21runrttasks10:49:110
134139910627,67cyclictest23848-21/usr/sbin/munin09:55:200
13413991058,83cyclictest195772chrt11:45:010
13413991057,84cyclictest16210-21swap11:30:250
13413991056,85cyclictest13898-21chrt11:21:250
134139910527,67cyclictest22323-21runrttasks07:44:130
134139910523,70cyclictest946-21ntpd08:10:210
13413991049,83cyclictest31422-21memory12:30:180
13413991049,83cyclictest22744-21memory07:45:170
13413991047,85cyclictest26823-21processes08:00:250
13413991047,83cyclictest32010-21find08:20:250
13413991047,83cyclictest288-21snmpd09:09:250
13413991046,84cyclictest27500-21latency_hist10:10:020
134139910430,63cyclictest4089-21runrttasks08:39:360
134139910428,65cyclictest28230-21runrttasks10:11:120
134139910427,65cyclictest15084-21runrttasks11:25:370
134139910426,67cyclictest8156-21runrttasks08:55:110
13413991039,70cyclictest15987-21df09:25:130
13413991038,82cyclictest4895-21users08:40:290
13413991038,72cyclictest20731-21seq11:49:430
13413991027,83cyclictest8202-21sed11:00:180
134139910223,67cyclictest22659-21ntpq09:50:200
13413991017,83cyclictest13402-21chrt09:15:130
13413991016,85cyclictest7280-21users10:55:290
134139910131,61cyclictest12909-21runrttasks09:12:390
13413991007,81cyclictest20899-21seq11:50:090
13413991007,77cyclictest32755-21chrt10:30:100
1341399997,81cyclictest1993-21ntp_states08:30:210
1341399906,73cyclictest13441-21grep07:10:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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