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2026-03-21 - 15:44

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 here to display the system's profile data or here to proceed to next system.
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 Sat Mar 21, 2026 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
39322580,3sleep0392-21wc10:35:260
141422020,2sleep01412-21ls08:35:150
3260621950,2sleep032607-21if_eth008:30:140
11039214420,29sleep011115-21/usr/sbin/munin07:05:240
2731221240,3chrt27311-21/usr/sbin/munin12:20:250
1314421190,3sleep013146-21grep09:20:160
2994921180,3chrt29951-21cpu08:20:110
1436121150,3chrt14359-21if_err_eth009:25:160
399021140,4chrt3991-21forks08:45:150
53152980,4sleep05316-21ntp_states10:55:250
191012980,4sleep019118-21munin-run11:50:000
284802970,3sleep028491-21ls12:25:190
113822960,2sleep011384-21sendmail11:20:000
11737999566,17cyclictest18334-21df07:35:100
172642940,3sleep017335-21/usr/sbin/munin09:35:260
11737999367,14cyclictest21168-21sh07:45:220
11737999365,16cyclictest28463-21sshd08:14:540
11737999364,19cyclictest10558-21memory09:10:180
11737999362,16cyclictest26649-21vmstat08:05:300
196702920,3sleep019714-21if_eth007:40:150
11737999264,17cyclictest22965-21seq12:04:490
11737999264,15cyclictest14151-21chrt07:18:580
11737999261,20cyclictest22255-21/usr/sbin/munin09:55:220
11737999164,17cyclictest1873-21sshd10:41:170
11737999052,24cyclictest2452-21/usr/sbin/munin10:45:250
11737998963,15cyclictest14728-21ntp_states07:20:220
11737998961,17cyclictest23440-21seq07:55:100
11737998961,15cyclictest24940-21memory08:00:180
11737998960,18cyclictest24406-21/usr/sbin/munin12:10:300
11737998960,17cyclictest20444-21date11:55:010
11737998863,14cyclictest28826-21sort08:15:180
11737998863,14cyclictest11899-21df_inode07:10:140
11737998862,14cyclictest16424-21chrt11:39:170
11737998862,14cyclictest14734-21sshd11:30:530
11737998861,15cyclictest31147-21ntp_states12:35:210
11737998858,18cyclictest10030-21chrt09:08:220
11737998764,14cyclictest32371-21cron08:30:000
11737998760,15cyclictest28473-21/usr/sbin/munin10:20:130
11737998760,15cyclictest26871-21/usr/sbin/munin12:20:010
11737998759,17cyclictest11952-21runrttasks09:15:220
11737998756,17cyclictest8142-21cut09:00:240
11737998745,15cyclictest16943-21awk11:40:190
11737998663,14cyclictest3737-21/usr/sbin/munin10:50:130
11737998662,14cyclictest25952-21ls10:10:130
11737998661,14cyclictest5480-21ntp_states08:50:220
11737998660,15cyclictest25834-21cat10:10:010
11737998659,17cyclictest28403-21latency_hist10:20:010
11737998563,12cyclictest8966-21df_inode11:10:140
11737998562,13cyclictest209-21dbus-daemon11:20:250
11737998562,13cyclictest1-21systemd12:35:010
11737998554,18cyclictest21696-21systemctl12:00:000
11737998461,14cyclictest29898-21irqstats10:25:170
11737998461,13cyclictest17062-21df07:30:140
11737998461,13cyclictest16134-21users09:30:310
11737998460,13cyclictest8085-21grep11:05:250
11737998457,14cyclictest16375-21sshd07:25:540
11737998454,18cyclictest18134-21/usr/sbin/munin09:40:270
11737998359,14cyclictest23310-21memory12:05:170
11737998358,14cyclictest23015-21runrttasks07:52:330
11737998353,18cyclictest23274-21date10:00:020
11737998351,22cyclictest216-21rs:main0
11737998257,15cyclictest31327-21ntpq10:30:210
11737998257,14cyclictest13191-21/usr/sbin/munin11:25:250
11737998158,14cyclictest3842-21grep08:45:020
11737998156,15cyclictest20782-21/usr/sbin/munin09:50:140
11737998058,13cyclictest6769-21ntp_states08:55:220
11737998047,23cyclictest6328-21/usr/sbin/munin11:00:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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