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2025-11-17 - 19:16

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 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 the highest latencies:
System rack4slot6s.osadl.org (updated Mon Nov 17, 2025 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
491022620,2sleep04909-21pluginstate12:20:280
2578621350,3chrt25787-21/usr/sbin/munin09:30:210
2573221350,4chrt25730-21df_inode07:25:140
2974521300,3chrt29746-21/usr/sbin/munin07:40:220
20906212320,21sleep020478-21/usr/sbin/munin07:05:240
1554221130,4sleep015027-21/usr/sbin/munin10:55:310
2288121110,3sleep022879-21entropy11:25:160
543421070,4sleep04826-21/usr/sbin/munin08:10:320
678221000,4sleep06783-21sshd08:16:030
179132950,3sleep017944-21latency09:00:200
77622870,4sleep07763-21sshd12:30:370
114142870,4sleep011431-21irqstats08:35:170
49902840,3sleep05029-21proc_pri10:15:280
228302830,2sleep022832-21tr09:20:010
131152763,5sleep00-21swapper08:40:400
59842744,58sleep06004-21irqstats12:25:190
21522734,58sleep02178-21df10:05:160
11322720,3sleep01170-21netstat07:55:220
91822700,3sleep09184-21grep08:25:290
240542684,55sleep022189-21snmpd09:24:340
21677996336,17cyclictest28451-21/usr/sbin/munin09:40:260
21677996210,18cyclictest16738-21ntp_states08:55:230
2167799618,20cyclictest29425-21lockfile-create07:40:000
208312610,2sleep020830-21switchtime09:10:280
2167799609,17cyclictest27815-21sshd07:32:370
2167799608,17cyclictest31853-21/usr/sbin/munin12:00:270
2167799599,17cyclictest6009-21/usr/sbin/munin10:20:200
2167799597,18cyclictest7295-21/usr/sbin/munin10:25:130
21677995935,16cyclictest26877-21runrttasks11:40:180
21677995935,15cyclictest20534-21/usr/sbin/munin11:15:280
297642580,2sleep029762-21processes09:45:260
2167799589,18cyclictest32281-21ntpq09:55:280
2167799589,15cyclictest15165-21/usr/sbin/munin08:50:160
21677995833,16cyclictest8717-21/usr/sbin/munin12:35:260
21677995821,13cyclictest2360-21if_eth008:00:160
21677995812,18cyclictest21600-21fw_packets11:20:150
21677995810,20cyclictest4125-21sshd12:17:350
2167799579,33cyclictest32115-21/usr/sbin/munin07:50:250
2167799579,19cyclictest29259-21/usr/sbin/munin11:50:300
2167799579,16cyclictest324-21munin-node12:05:140
2167799579,15cyclictest12458-21/usr/sbin/munin10:45:160
2167799577,18cyclictest13867-21cat10:50:170
2167799577,16cyclictest2235-21grep12:10:220
21677995733,14cyclictest10048-21/usr/sbin/munin08:30:130
21677995710,18cyclictest30982-21ntpq09:50:240
21677995710,18cyclictest23132-21chrt07:15:140
21677995710,14cyclictest28292-21/usr/sbin/munin11:45:260
2167799569,16cyclictest11035-21munin-run10:40:010
2167799569,15cyclictest3543-21/usr/sbin/munin08:05:230
2167799569,14cyclictest19058-21/usr/sbin/munin09:05:320
2167799568,16cyclictest18914-21/usr/sbin/munin11:10:150
2167799567,16cyclictest30833-21/usr/sbin/munin07:45:290
2167799567,15cyclictest24097-21/usr/sbin/munin11:30:170
21677995634,15cyclictest16530-21/usr/sbin/munin11:00:210
21677995633,15cyclictest8637-21/usr/sbin/munin10:30:140
21677995633,15cyclictest11226-21/usr/sbin/munin10:40:130
2167799559,19cyclictest25379-21/usr/sbin/munin11:35:210
2167799559,16cyclictest17632-21/usr/sbin/munin11:05:170
2167799559,15cyclictest7932-21/usr/sbin/munin08:20:310
2167799559,14cyclictest26872-21df_inode09:35:140
2167799558,18cyclictest4563-21latency_hist10:15:010
21677995517,13cyclictest228702chrt07:14:310
2167799548,16cyclictest1696-21sshd10:02:360
2167799548,15cyclictest24387-21/usr/sbin/munin07:20:290
2167799547,14cyclictest14167-21ntp_states08:45:230
21677995431,15cyclictest24434-21/usr/sbin/munin09:25:190
21677995410,13cyclictest30543-21/usr/sbin/munin11:55:280
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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