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2026-06-10 - 17:26

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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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.

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 100 highest latencies:
System rack4slot6s.osadl.org (updated Wed Jun 10, 2026 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2831722570,3sleep028316-21wc12:20:240
1633922440,3sleep016343-21latency11:35:160
2064822100,2sleep020651-21netstat07:40:180
2016921360,4sleep020168-21wc09:45:020
2658321270,4chrt26584-21cat10:10:010
2382821210,3chrt23827-21latency_hist12:05:010
2042921120,3chrt20428-21/usr/sbin/munin09:45:170
1526721110,3sleep015273-21df_inode07:20:130
2777421040,2sleep027775-21latency_hist12:20:020
2912521030,4sleep029170-21sendmail10:20:010
1507521020,4sleep015125-21df09:25:100
2119821000,3sleep021213-21munin-run11:55:010
52562990,3sleep05254-21grep08:45:280
9712970,4sleep01006-21proc_pri10:35:240
297612970,4sleep029827-21sort10:20:270
108742970,3sleep010911-21latency_hist11:15:020
292392960,4sleep029240-21sshd08:14:340
167062960,5sleep016770-21mailstats09:30:250
320902950,4sleep032104-21forks08:25:130
151142950,3sleep015158-21ntpq11:30:200
253612938,8sleep00-21swapper12:10:170
4012900,3sleep0402-21latency_hist12:40:020
269342764,61sleep026959-21ntpq10:10:200
192842760,3sleep019286-21awk11:45:280
1157527217,33sleep011594-21ntp_states07:05:200
12509996011,14cyclictest319172sleep008:25:010
1250999599,17cyclictest276-21runrttasks07:31:330
1250999598,18cyclictest3614-21/usr/sbin/munin10:45:250
1250999598,16cyclictest30380-21/usr/sbin/munin12:30:160
12509995932,17cyclictest13046-21/usr/sbin/munin07:10:250
12509995921,13cyclictest19603-21switchtime07:35:270
12509995910,18cyclictest288-21snmpd10:28:340
1250999587,19cyclictest3446-21/usr/sbin/munin08:40:270
1250999587,17cyclictest11000-21/usr/sbin/munin11:15:260
12509995835,13cyclictest17043-21/usr/sbin/munin07:25:270
12509995834,15cyclictest12617-21/usr/sbin/munin11:20:220
12509995834,14cyclictest7706-21/usr/sbin/munin08:55:250
12509995820,14cyclictest7612-21runrttasks11:00:260
12509995811,17cyclictest17785-21irqstats09:35:150
1250999578,17cyclictest17486-21/usr/sbin/munin11:40:250
1250999578,15cyclictest4549-21/usr/sbin/munin10:50:130
12509995732,17cyclictest14472-21/usr/sbin/munin07:15:260
12509995731,16cyclictest22863-21/usr/sbin/munin09:55:110
12509995730,17cyclictest22166-21runrttasks09:50:490
12509995730,16cyclictest22792-21runrttasks07:49:350
12509995710,14cyclictest844-21/usr/sbin/munin08:30:130
12509995710,14cyclictest21336-21/usr/sbin/munin11:55:200
1250999569,14cyclictest6278-21ntpq08:50:180
1250999568,15cyclictest6179-21grep10:55:240
1250999567,17cyclictest9955-21chrt09:05:120
1250999567,16cyclictest11469-21ntpq09:10:180
1250999567,15cyclictest24113-21/usr/sbin/munin10:00:270
12509995634,14cyclictest25760-21/usr/sbin/munin08:00:180
12509995632,15cyclictest27009-21irqstats08:05:170
12509995629,16cyclictest8949-21/usr/sbin/munin09:00:230
12509995610,14cyclictest29831-21chrt08:15:260
12509995533,14cyclictest24350-21/usr/sbin/munin07:55:140
12509995531,15cyclictest31948-21/usr/sbin/munin10:30:150
12509995510,19cyclictest288-21snmpd11:29:180
12509995510,14cyclictest13957-21/usr/sbin/munin09:20:160
1250999549,18cyclictest2286-21/usr/sbin/munin08:35:170
1250999547,14cyclictest8719-21ntp_states11:05:210
12509995430,13cyclictest12734-21/usr/sbin/munin09:15:190
12509995429,16cyclictest24002-21df_inode12:05:160
1250999539,18cyclictest2634-21seq10:40:490
12509995330,15cyclictest29370-21/usr/sbin/munin12:25:180
12509995310,16cyclictest23037-21df_inode07:50:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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