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2026-04-03 - 18:41

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #7

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.

Note that this system runs a non-RT kernel.
Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackbslot7s.osadl.org (updated Fri Apr 03, 2026 12:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
181321785925,17815sleep212406-21kworker/u8:207:12:432
18469215149,1493sleep317375-21kworker/3:209:44:413
2839828475,831sleep028051-1kworker/0:2H08:37:180
18431254210,518sleep118467-21ntpq11:27:231
19266249022,450sleep219272-21/usr/sbin/munin08:07:312
631524017,383sleep013441-21snmpd10:48:220
631524017,383sleep013441-21snmpd10:48:220
12329234813,222sleep012458-21latency_hist07:47:020
28764227216,241sleep228771-21ntp_states10:17:272
28764227216,241sleep228771-21ntp_states10:17:272
265022271102,55sleep00-21swapper/011:52:260
265022271102,55sleep00-21swapper/011:52:260
20058224918,217sleep320106-21unin-run08:12:003
1516122466,12sleep00-21swapper/007:54:170
22026223924,155sleep022116-21fschecks_time08:17:190
22026223924,155sleep022116-21fschecks_time08:17:190
2485223630,22sleep031713-21cyclictest08:57:170
203192234108,71sleep00-21swapper/008:12:100
1388022320,19sleep031713-21cyclictest07:52:010
15288223115,193sleep015313-21munin-plugin-st09:36:580
16247222115,150sleep016217-21latency_hist11:22:010
684722149,19sleep00-21swapper/007:27:270
109921960,110sleep31103-21kworker/u8:112:16:593
2792121857,79sleep00-21swapper/010:16:120
2792121857,79sleep00-21swapper/010:16:120
13998218418,142sleep00-21swapper/011:12:280
13248218220,146sleep113376-21unixbench_multi07:47:311
19080218115,60sleep00-21swapper/009:47:200
21028217922,139sleep121183-21grep08:12:311
22803217722,137sleep122909-21tune2fs11:42:171
2348221737,152sleep023534-21sort08:22:150
2348221737,152sleep023534-21sort08:22:150
301412171108,44sleep00-21swapper/008:42:180
688621709,143sleep00-21swapper/010:52:130
688621709,143sleep00-21swapper/010:52:130
3156421647,37sleep00-21swapper/010:27:100
1317121615,12sleep00-21swapper/009:27:460
1317121615,12sleep00-21swapper/009:27:460
1150721615,11sleep00-21swapper/011:06:510
1929215827,78sleep01932-21cron10:36:590
8466215194,35sleep18471-21cpu10:57:151
1426214911,123sleep01438-21munin-node07:12:080
1323214827,99sleep00-21swapper/008:52:490
8385214610,119sleep01-21systemd09:17:000
3750214618,104sleep23829-21mailstats07:17:282
3325214113,27sleep20-21swapper/212:22:242
1161213932,55sleep01117-21latency_hist12:17:010
32028213752,73sleep01-21systemd12:12:000
807521368,111sleep00-21swapper/007:32:200
30292213612,102sleep00-21swapper/010:22:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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