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2026-03-18 - 12:35

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 all highest latencies:
System rack4slot6s.osadl.org (updated Wed Mar 18, 2026 00:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
901922720,2sleep09020-21modprobe21:55:000
1706822570,3sleep017071-21wc22:25:170
1200822500,3sleep012007-21wc00:10:260
81322360,3sleep0817-21timerwakeupswit19:15:270
2348921420,2sleep023487-21grep20:45:020
643421300,3chrt6430-21cpu23:50:100
1195621240,3sleep011952-21cat22:05:200
146521200,3chrt1464-21/usr/sbin/munin23:30:190
772021180,4chrt7718-21sshd19:43:320
1421221110,3chrt14214-21cpu00:20:130
259722910,4sleep026062-21latency_hist20:55:020
307282880,2sleep030741-21vmstat19:05:260
133102870,4sleep013373-21switchtime00:15:260
137752830,4sleep0288-21snmpd22:11:440
31342998252,20cyclictest10683-21/usr/sbin/munin19:55:140
32662810,3sleep03313-21cat19:25:260
31342998154,16cyclictest27987-21users21:00:300
31342997951,17cyclictest20845-21df_inode22:40:140
31342997855,15cyclictest8511-21runrttasks23:57:030
31342997749,16cyclictest12509-21vmstat20:00:300
31342997653,14cyclictest16945-21runrttasks20:20:010
31342997652,14cyclictest15563-21/usr/sbin/munin00:25:140
31342997647,16cyclictest19930-21ntp_states20:30:220
31342997645,16cyclictest18490-21/usr/sbin/munin00:35:250
31342997547,18cyclictest3147-21users23:35:290
31342997545,15cyclictest4705-21runrttasks23:42:250
31342997535,24cyclictest31735-21ntp_states19:10:220
31342997449,15cyclictest15540-21seq20:14:180
31342997448,17cyclictest5437-21ntp_states23:45:210
31342997448,14cyclictest4398-21runrttasks19:30:170
31342997447,16cyclictest760-21runrttasks23:26:540
31342997447,16cyclictest25851-21latency_hist23:00:020
31342997445,16cyclictest1721-21awk21:25:220
31342997444,17cyclictest10449-21/usr/sbin/munin22:00:180
31342997350,13cyclictest19761-21ntp_states22:35:220
31342997348,14cyclictest18781-21/usr/sbin/munin22:30:300
31342997347,13cyclictest13639-21systemctl20:05:260
31342997344,16cyclictest25939-21/usr/sbin/munin23:00:220
31342997343,20cyclictest21194-21/usr/sbin/munin20:35:210
31342997246,14cyclictest30607-21seq23:16:500
31342997148,14cyclictest6751-21/usr/sbin/munin21:45:170
31342997147,13cyclictest8026-21/usr/sbin/munin19:45:100
31342997144,14cyclictest26051-21wc20:55:020
31342997143,16cyclictest31453-21ntp_states23:20:220
31342997049,13cyclictest24401-21runrttasks22:54:130
31342997046,15cyclictest17556-21/usr/sbin/munin20:20:260
31342997046,13cyclictest9389-21/usr/sbin/munin19:50:140
31342997045,17cyclictest29219-21runrttasks23:10:560
31342997045,14cyclictest2880-21memory21:30:180
31342997037,21cyclictest17289-21awk00:30:290
31342996945,14cyclictest9843-21chrt00:02:090
31342996945,14cyclictest22150-21idleruntime22:45:140
31342996944,15cyclictest31222-21latency_hist21:15:020
31342996944,13cyclictest9340-21seq21:55:180
31342996942,18cyclictest15675-21runrttasks22:20:110
31342996940,17cyclictest1584-21/usr/sbin/munin19:20:140
31342996937,19cyclictest28685-21seq21:05:110
31342996844,15cyclictest18481-21if_eth020:25:150
31342996832,15cyclictest27893-21seq23:05:570
31342996829,14cyclictest31543-21ntpq21:15:170
31342996746,13cyclictest15485-21munin-run22:20:020
31342996742,14cyclictest24751-21grep20:50:020
31342996737,17cyclictest5695-21ntpq19:35:190
31342996637,18cyclictest4027-21df21:35:110
31342996632,22cyclictest5285-21/usr/sbin/munin21:40:130
31342996531,21cyclictest32586-21munin-node21:20:100
31342996523,18cyclictest10379-21df_inode00:05:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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