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2026-03-27 - 18:26

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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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 50 highest latencies:
System rack4slot6s.osadl.org (updated Fri Mar 27, 2026 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1118522150,3sleep011182-21cat09:25:260
2030421210,4chrt20303-21/usr/sbin/munin10:00:270
2779421160,3sleep027792-21cat12:35:260
691721090,3sleep06920-21open_files11:15:230
2885021070,4chrt28851-21latency_hist08:30:010
1271621050,5sleep0285-21sshd11:38:150
170022950,4sleep017019-21fw_packets11:55:160
324912930,2sleep032493-21latency_hist10:50:000
307892900,3sleep030801-21/usr/sbin/munin08:35:290
261782855,11sleep0288-21snmpd08:19:570
695428120,35sleep07007-21/usr/sbin/munin07:05:110
252992720,3sleep025310-21vmstat12:25:300
267032670,3sleep026704-21cat10:25:270
174662650,3sleep017470-21latency07:45:160
8159996111,19cyclictest14027-21sshd11:43:150
8159996034,17cyclictest24588-21runrttasks12:25:010
8159996012,16cyclictest26041-21df12:30:130
815999599,18cyclictest29910-21munin-run10:40:000
815999599,17cyclictest27459-21/usr/sbin/munin10:30:200
815999599,17cyclictest14705-21/usr/sbin/munin07:35:260
815999598,18cyclictest28918-21/usr/sbin/munin08:30:200
8159995930,18cyclictest20901-21/usr/sbin/munin12:10:130
815999589,19cyclictest23198-21sshd08:06:330
815999589,15cyclictest16162-21irqstats07:40:170
815999588,15cyclictest9416-21latency_hist07:15:000
815999587,18cyclictest5500-21/usr/sbin/munin09:05:240
8159995835,15cyclictest4437-21/usr/sbin/munin11:05:240
8159995834,16cyclictest30100-21/usr/sbin/munin10:40:100
8159995833,16cyclictest17271-21/usr/sbin/munin09:50:160
8159995833,16cyclictest10701-21/usr/sbin/munin11:30:170
8159995831,15cyclictest9359-21/usr/sbin/munin11:25:160
8159995810,16cyclictest9538-21/usr/sbin/munin07:15:160
815999579,16cyclictest448-21ntpq10:50:230
815999577,18cyclictest14558-21/usr/sbin/munin09:40:200
815999577,17cyclictest7921-21/usr/sbin/munin11:20:250
815999577,17cyclictest22389-21ntp_states12:15:210
815999577,16cyclictest12487-21/usr/sbin/munin09:30:300
815999577,15cyclictest13246-21/usr/sbin/munin09:35:190
8159995733,16cyclictest18388-21/usr/sbin/munin12:00:150
8159995733,15cyclictest24230-21/usr/sbin/munin08:10:270
8159995733,15cyclictest13755-21/usr/sbin/munin07:30:240
8159995732,16cyclictest19574-21runrttasks07:53:430
8159995731,16cyclictest1831-21/usr/sbin/munin10:55:250
8159995731,16cyclictest1742-21/usr/sbin/munin08:50:150
8159995710,17cyclictest4258-21df09:00:120
8159995710,14cyclictest21463-21/usr/sbin/munin08:00:200
815999569,14cyclictest9582-21/usr/sbin/munin09:20:160
8159995634,15cyclictest23023-21runrttasks10:11:330
8159995633,14cyclictest8557-21/usr/sbin/munin09:15:250
8159995632,16cyclictest2999-21/usr/sbin/munin11:00:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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