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2026-09-19 - 11:05

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 highest latencies:
System rack4slot6s.osadl.org (updated Sat Sep 19, 2026 00:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
426222680,3sleep04264-21ntp_kernel_err20:40:190
130822580,3sleep01310-21latency_hist20:30:010
1864922530,2sleep018648-21mailstats21:35:270
822822310,3sleep08229-21processes20:55:250
150621240,4chrt1507-21ntp_kernel_pll_22:35:210
2002821180,4chrt20024-21ps19:35:270
2283621120,2sleep022833-21grep19:45:280
1533721090,2sleep015338-21modprobe23:30:000
2724921020,4sleep027274-21missed_timers00:15:210
313692970,2sleep031368-21df20:20:120
30332960,3sleep03104-21fgrep20:35:260
211282950,2sleep021127-21awk23:50:270
75802910,3sleep07613-21latency_hist23:00:010
135152890,3sleep013516-21ntp_states19:10:230
221462880,3sleep022170-21idleruntime21:50:150
249402876,10sleep024961-21ntp_states22:00:220
134072870,4sleep013479-21users23:20:300
240372856,12sleep0288-21snmpd21:56:020
233912850,4sleep023400-21wc00:00:180
1191727922,33sleep011967-21df19:05:100
121212776,58sleep012150-21users23:15:270
262382750,3sleep026236-21ntpq22:05:210
218912756,57sleep021941-21df23:55:120
13120996729,27cyclictest9253-21/usr/sbin/munin23:05:190
13120996429,22cyclictest29229-21/usr/sbin/munin20:10:270
13120996225,15cyclictest23827-21sshd19:50:180
13120996211,18cyclictest17899-21idleruntime-cro23:40:000
13120996123,14cyclictest31265-21latency_hist20:20:020
13120996034,15cyclictest13128-21/usr/sbin/munin21:15:150
1312099598,16cyclictest7706-21/usr/sbin/munin23:00:190
1312099598,15cyclictest27252-21/usr/sbin/munin22:10:320
1312099597,19cyclictest6350irq/103-63fec0021:25:200
1312099597,17cyclictest9168-21/usr/sbin/munin21:00:290
13120995934,15cyclictest26672-21/usr/sbin/munin20:00:270
13120995920,15cyclictest21224-21runrttasks19:40:180
13120995910,18cyclictest31404-21ntpq22:25:190
1312099589,18cyclictest24492-21/usr/sbin/munin00:05:260
1312099589,17cyclictest5296-21/usr/sbin/munin20:45:210
1312099588,18cyclictest10422-21irqstats23:10:170
1312099588,17cyclictest3491-21seq22:43:160
1312099587,18cyclictest32230-21/usr/sbin/munin00:35:290
13120995834,14cyclictest18095-21/usr/sbin/munin23:40:110
13120995833,16cyclictest25825-21runrttasks00:10:100
13120995810,15cyclictest19096-21sshd19:31:190
1312099579,16cyclictest1683-21ntpq20:30:200
1312099579,14cyclictest10516-21df21:05:130
1312099578,19cyclictest15633-21load23:30:180
1312099577,18cyclictest28532-21/usr/sbin/munin22:15:160
1312099577,18cyclictest19405-21/usr/sbin/munin23:45:130
13120995733,16cyclictest29993-21/usr/sbin/munin00:25:240
13120995730,17cyclictest579-21runrttasks22:30:390
13120995729,16cyclictest0-21swapper00:31:070
13120995710,19cyclictest15821-21/usr/sbin/munin19:20:180
1312099569,17cyclictest25121-21ntp_states19:55:240
1312099569,17cyclictest17214-21ntp_states21:30:220
1312099568,18cyclictest15578-21sshd19:19:190
1312099568,16cyclictest17293-21/usr/sbin/munin19:25:180
1312099567,16cyclictest28377-21/usr/sbin/munin00:20:100
1312099567,15cyclictest3828-21/usr/sbin/munin22:45:260
13120995632,15cyclictest20115-21users21:40:290
13120995631,15cyclictest21417-21runrttasks21:45:330
13120995630,16cyclictest12764-21runrttasks21:13:500
1312099558,14cyclictest5113-21/usr/sbin/munin22:50:280
1312099558,13cyclictest30141-21ntp_states22:20:210
13120995510,14cyclictest14561-21cat21:20:180
13120995410,16cyclictest7138-21ls20:50:270
13120995330,15cyclictest27512-21/usr/sbin/munin20:05:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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