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2026-06-23 - 12:23

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 100 highest latencies:
System rack9slot3s.osadl.org (updated Tue Jun 23, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
119591610,41ptp4l0-21swapper/019:05:120
119591540,31ptp4l0-21swapper/119:05:191
1447425249,1sleep30-21swapper/319:05:153
1651225042,2sleep20-21swapper/219:06:572
201112450,0sleep10-21swapper/123:15:171
137912430,0sleep20-21swapper/220:00:222
119591320,0ptp4l0-21swapper/119:15:221
119591210,0ptp4l0-21swapper/122:55:171
1700999200,2cyclictest23016-21kworker/1:222:45:241
119591200,0ptp4l0-21swapper/119:25:191
119591190,0ptp4l0-21swapper/122:25:191
119591190,0ptp4l0-21swapper/100:35:221
119591190,0ptp4l0-21swapper/021:40:130
119591190,0ptp4l0-21swapper/000:35:230
119591180,0ptp4l0-21swapper/121:05:171
119591180,0ptp4l0-21swapper/021:45:200
119591170,0ptp4l0-21swapper/022:55:180
202052160,0sleep20-21swapper/219:15:022
119591160,0ptp4l0-21swapper/121:35:261
119591160,0ptp4l0-21swapper/119:50:191
119591160,0ptp4l0-21swapper/100:10:121
119591150,1ptp4l4774-21snmp_o5powerctl23:45:220
119591150,1ptp4l4216-21apt-get20:45:131
119591150,1ptp4l28019-21df23:30:151
119591150,1ptp4l26673-21ls22:25:200
119591150,1ptp4l24621-21snmp_o5powerctl20:20:221
119591150,1ptp4l2126-21snmp_o5powerctl23:40:220
119591150,1ptp4l19304-21ls21:10:241
119591150,1ptp4l17869-21ntp_states00:10:190
119591150,0ptp4l0-21swapper/123:55:221
119591150,0ptp4l0-21swapper/123:45:201
119591150,0ptp4l0-21swapper/123:20:111
119591150,0ptp4l0-21swapper/122:35:121
119591150,0ptp4l0-21swapper/121:20:121
119591150,0ptp4l0-21swapper/120:05:131
119591150,0ptp4l0-21swapper/100:15:121
119591150,0ptp4l0-21swapper/023:05:130
119591150,0ptp4l0-21swapper/022:10:130
119591150,0ptp4l0-21swapper/020:35:020
119591150,0ptp4l0-21swapper/020:25:130
119591150,0ptp4l0-21swapper/019:25:110
17010991413,0cyclictest33-21ksoftirqd/219:35:172
119591140,1ptp4l9522-21/usr/sbin/munin20:55:121
119591140,1ptp4l7246-21expr20:50:131
119591140,1ptp4l6760-21irqrtprio23:50:160
119591140,1ptp4l6714-21cstates21:50:140
119591140,1ptp4l6367-21df22:50:121
119591140,1ptp4l5267-21/usr/sbin/munin19:45:180
119591140,1ptp4l4047-21/usr/sbin/munin19:45:131
119591140,1ptp4l3322-21users19:40:230
119591140,1ptp4l3322-21users19:40:230
119591140,1ptp4l32647-21cut23:40:010
119591140,1ptp4l29760-21snmp_o5powerctl21:30:210
119591140,1ptp4l29070-21ntpq22:30:190
119591140,1ptp4l26332-21systemctl23:25:201
119591140,1ptp4l25910-21df_inode21:25:130
119591140,1ptp4l25660-21ls00:25:180
119591140,1ptp4l24495-21ntp_states19:20:180
119591140,1ptp4l23177-21awk23:20:180
119591140,1ptp4l21133-21hddtemp_smartct19:15:140
119591140,1ptp4l20374-21telnet20:15:120
119591140,1ptp4l18685-21sendmail_mailtr19:10:210
119591140,1ptp4l18569-21snmp_o5powerctl22:10:231
119591140,1ptp4l16307-21pmu-power21:05:220
119591140,1ptp4l16006-21updatedb.mlocat00:07:241
119591140,1ptp4l14822-21irqstats00:05:160
119591140,1ptp4l13418-21ls22:00:230
119591140,1ptp4l12121-21fschecks_count22:00:151
119591140,0ptp4l8683-21ls20:50:220
119591140,0ptp4l12888-21ls00:00:240
119591140,0ptp4l0-21swapper/222:25:192
119591140,0ptp4l0-21swapper/222:10:232
119591140,0ptp4l0-21swapper/123:50:121
119591140,0ptp4l0-21swapper/123:00:511
119591140,0ptp4l0-21swapper/122:40:191
119591140,0ptp4l0-21swapper/122:17:321
119591140,0ptp4l0-21swapper/121:40:361
119591140,0ptp4l0-21swapper/121:31:051
119591140,0ptp4l0-21swapper/121:26:211
119591140,0ptp4l0-21swapper/120:40:211
119591140,0ptp4l0-21swapper/120:30:021
119591140,0ptp4l0-21swapper/120:25:201
119591140,0ptp4l0-21swapper/120:10:071
119591140,0ptp4l0-21swapper/119:37:321
119591140,0ptp4l0-21swapper/119:20:231
119591140,0ptp4l0-21swapper/100:20:211
119591140,0ptp4l0-21swapper/100:00:221
119591140,0ptp4l0-21swapper/023:25:210
119591140,0ptp4l0-21swapper/023:15:220
119591140,0ptp4l0-21swapper/023:00:240
119591140,0ptp4l0-21swapper/022:51:550
119591140,0ptp4l0-21swapper/021:35:160
119591140,0ptp4l0-21swapper/021:20:220
119591140,0ptp4l0-21swapper/020:20:220
119591140,0ptp4l0-21swapper/000:15:130
119591130,1ptp4l0-21swapper/120:35:121
119591130,0ptp4l0-21swapper/223:55:172
119591130,0ptp4l0-21swapper/223:20:172
119591130,0ptp4l0-21swapper/222:35:232
119591130,0ptp4l0-21swapper/222:20:132
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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