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2026-08-12 - 23:06

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #3

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.
Unexpectedly long latencies may be caused by SMIs
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 rack9slot3s.osadl.org (updated Wed Aug 12, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
119591640,47ptp4l0-21swapper/107:09:481
119591630,31ptp4l0-21swapper/007:06:240
1300915752,2phc2sys0-21swapper/207:05:132
1136025047,1sleep30-21swapper/307:05:143
88872450,0sleep10-21swapper/111:00:201
119591300,0ptp4l0-21swapper/011:45:240
119591180,1ptp4l20909-21apt-get12:25:110
119591180,0ptp4l0-21swapper/110:45:251
119591180,0ptp4l0-21swapper/107:45:011
119591180,0ptp4l0-21swapper/011:10:170
119591180,0ptp4l0-21swapper/010:35:130
119591180,0ptp4l0-21swapper/010:20:220
119591180,0ptp4l0-21swapper/008:35:230
119591160,1ptp4l31746-21ntp_states08:40:201
119591160,1ptp4l2332-21apt-get11:50:131
119591160,1ptp4l21281-21apt-get11:25:120
119591160,1ptp4l21209-21apt-get10:25:010
119591160,1ptp4l21057-21snmp_o5powerctl09:20:231
119591160,1ptp4l17802-21snmp_o5powerctl10:15:221
119591160,1ptp4l10824-21apt-get10:05:131
119591160,0ptp4l0-21swapper/110:55:121
119591160,0ptp4l0-21swapper/009:45:010
119591150,1ptp4l8765-21apt-get09:00:110
119591150,1ptp4l5257-21users08:50:240
119591150,1ptp4l4217-21perl07:50:151
119591150,1ptp4l2834-21/usr/sbin/munin09:50:170
119591150,1ptp4l28244-21snmp_o5powerctl11:35:240
119591150,1ptp4l28214-21ps09:35:170
119591150,1ptp4l27862-21apt-get07:35:121
119591150,1ptp4l26345-21snmp_o5powerctl09:30:220
119591150,1ptp4l25225-21snmp_o5powerctl12:30:221
119591150,1ptp4l23320-21munin-run12:30:001
119591150,1ptp4l22903-21interrupts09:25:162
119591150,1ptp4l16978-21ntp_states12:15:200
119591150,1ptp4l15722-21grep12:15:131
119591150,1ptp4l12521-21irqstats09:05:171
119591150,0ptp4l14690-21ls10:10:160
119591150,0ptp4l0-21swapper/211:39:562
119591150,0ptp4l0-21swapper/112:22:321
119591150,0ptp4l0-21swapper/111:57:461
119591150,0ptp4l0-21swapper/111:45:121
119591150,0ptp4l0-21swapper/111:05:251
119591150,0ptp4l0-21swapper/110:21:011
119591150,0ptp4l0-21swapper/108:35:011
119591150,0ptp4l0-21swapper/108:16:441
119591150,0ptp4l0-21swapper/107:15:121
119591150,0ptp4l0-21swapper/012:35:110
119591150,0ptp4l0-21swapper/011:20:210
119591150,0ptp4l0-21swapper/009:40:120
119591150,0ptp4l0-21swapper/008:30:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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