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2026-03-30 - 04:20

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 Mon Mar 30, 2026 00:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
119591640,44ptp4l0-21swapper/019:05:380
119591640,39ptp4l0-21swapper/119:09:391
1667225144,2sleep20-21swapper/219:05:122
1888825042,6sleep30-21swapper/319:07:243
119591200,0ptp4l0-21swapper/123:40:221
119591200,0ptp4l0-21swapper/120:30:231
119591190,0ptp4l0-21swapper/121:45:011
119591180,0ptp4l0-21swapper/100:30:211
119591180,0ptp4l0-21swapper/023:10:170
119591160,3ptp4l12198-21if_enp0s31f620:55:151
119591160,0ptp4l0-21swapper/020:45:170
119591160,0ptp4l0-21swapper/020:35:120
119591150,1ptp4l6341-21smartctl22:45:170
119591150,1ptp4l3659-21apt-get19:40:142
119591150,1ptp4l28751-21snmp_o5powerctl23:25:220
119591150,1ptp4l27135-21snmp_o5powerctl19:20:211
119591150,1ptp4l2681-21latency_hist22:40:011
119591150,1ptp4l26271-21snmp_o5powerctl22:20:210
119591150,1ptp4l26106-21snmp_o5powerctl23:20:221
119591150,1ptp4l22928-21df20:15:142
119591150,1ptp4l21489-21ls20:10:241
119591150,1ptp4l21275-21snmp_o5powerctl20:10:220
119591150,1ptp4l20580-21snmp_o5powerctl23:10:211
119591150,1ptp4l1784-21ls23:35:231
119591150,1ptp4l17757-21snmp_o5powerctl00:05:230
119591150,1ptp4l17416-21df_inode20:05:130
119591150,1ptp4l17053-21cut21:05:130
119591150,1ptp4l10129-21snmp_o5powerctl21:50:230
119591150,0ptp4l0-21swapper/122:55:101
119591150,0ptp4l0-21swapper/122:50:111
119591150,0ptp4l0-21swapper/022:10:120
119591150,0ptp4l0-21swapper/021:55:120
119591150,0ptp4l0-21swapper/019:45:360
119591150,0ptp4l0-21swapper/000:21:300
119591140,1ptp4l9514-21smartctl20:50:151
119591140,1ptp4l6892-21grep23:45:200
119591140,1ptp4l6217-21date19:45:010
119591140,1ptp4l32038-21ls19:30:151
119591140,1ptp4l31649-21ps19:30:140
119591140,1ptp4l30284-21sed20:30:000
119591140,1ptp4l29950-21diskstats00:30:150
119591140,1ptp4l28842-21users00:25:242
119591140,1ptp4l28382-21irqrtprio21:25:201
119591140,1ptp4l2803-21aten_r9power_cu22:40:122
119591140,1ptp4l26151-21hddtemp_smartct19:20:140
119591140,1ptp4l25814-21hddtemp_smartct20:20:150
119591140,1ptp4l23351-21sort23:15:242
119591140,1ptp4l21984-21df_inode00:15:161
119591140,1ptp4l19550-21hddtemp_smartct00:10:160
119591140,1ptp4l17533-21phc2sys-jitter00:05:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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