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2026-06-04 - 07:27

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 Thu Jun 04, 2026 00:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2264422650,3sleep022645-21systemctl20:10:220
922122480,3sleep09219-21grep23:45:240
553521180,3sleep05534-21wc21:25:240
1910621150,3sleep019108-21latency_hist00:25:010
1532721130,2sleep015328-21modprobe19:35:000
1776621040,3sleep017791-21munin-run00:20:000
2761621020,3sleep027615-21ls22:50:270
142362990,2sleep014253-21missed_timers00:05:190
101972980,4sleep010215-21/usr/sbin/munin19:10:140
287502960,3sleep028753-21sort20:40:210
196752940,2sleep019671-21ntpq22:20:200
180622930,4sleep018102-21latency_hist19:50:010
288122880,2sleep028809-21find22:55:240
37862870,3sleep03787-21/usr/sbin/munin23:25:130
10033998259,14cyclictest14811-21/usr/sbin/munin22:00:290
10033998258,13cyclictest13346-21/usr/sbin/munin00:00:280
10033998153,17cyclictest9268-21/usr/sbin/munin21:40:180
10033998151,15cyclictest13698-21sshd21:56:580
10033998053,15cyclictest23926-21seq20:18:460
10033997954,14cyclictest1980-21chrt23:17:340
10033997953,14cyclictest8151-21sendmail_mailqu21:35:260
10033997952,17cyclictest20686-21memory00:30:180
10033997853,16cyclictest30654-21mailstats20:50:220
10033997853,14cyclictest7876-21ntp_states23:40:220
10033997851,14cyclictest18245-21/usr/sbin/munin19:50:100
10033997850,16cyclictest11692-21df_inode21:50:140
10033997752,14cyclictest19805-21/usr/sbin/munin00:25:280
10033997750,14cyclictest19068-21chrt22:18:340
10033997750,14cyclictest17416-21ls19:45:020
10033997749,16cyclictest2432-21/usr/sbin/munin23:20:260
10033997653,14cyclictest27240-21runrttasks20:33:490
10033997652,15cyclictest32454-21memory21:00:140
10033997651,14cyclictest22252-21ntp_states22:30:220
10033997651,13cyclictest15516-21memory00:10:180
10033997650,14cyclictest31987-21seq20:58:580
10033997646,19cyclictest31007-21/usr/sbin/munin23:05:150
10033997553,13cyclictest24749-21memory22:40:180
10033997551,13cyclictest20487-21/usr/sbin/munin20:00:180
10033997550,15cyclictest276-21runrttasks20:49:540
10033997549,16cyclictest28119-21munin-run20:40:020
10033997548,14cyclictest10346-21/usr/sbin/munin21:45:140
10033997541,19cyclictest12403-21chrt19:20:160
910427420,32sleep09115-21ntp_states19:05:200
10033997452,13cyclictest1267-21runrttasks21:06:100
10033997451,14cyclictest23071-21latency_hist00:40:030
10033997449,15cyclictest2456-21users21:10:260
10033997351,14cyclictest24584-21/usr/sbin/munin20:20:210
10033997350,14cyclictest7199-21runrttasks21:31:310
10033997349,16cyclictest12020-21latency_hist19:20:020
10033997348,15cyclictest946-21ntpd23:55:210
10033997341,20cyclictest32345-21/usr/sbin/munin23:10:120
10033997338,22cyclictest13655-21chrt19:26:540
10033997250,12cyclictest10455-21ntp_states23:50:220
10033997243,19cyclictest16047-21idleruntime-cro19:40:000
10033997238,20cyclictest3899-21/usr/sbin/munin21:20:170
10033997232,14cyclictest20735-21df22:25:110
10033997147,13cyclictest276-21runrttasks22:12:090
10033997145,16cyclictest16109-21users22:05:300
10033997140,20cyclictest25841-21/usr/sbin/munin22:45:200
10033997138,20cyclictest3789-21sendmail-msp21:20:010
10033997049,13cyclictest1-21systemd23:35:010
10033997049,12cyclictest24344-21runrttasks22:39:340
10033997044,15cyclictest19961-21runrttasks19:59:210
10033996946,14cyclictest22177-21cat20:10:020
10033996936,21cyclictest6333-21df23:35:120
10033996734,21cyclictest29995-21ntpq23:00:200
10033996439,15cyclictest26061-21seq20:29:420
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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