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2026-05-25 - 05:55

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 Mon May 25, 2026 00:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1119622970,3sleep011197-21cat20:30:280
58522450,3sleep0584-21tr19:50:220
2511321250,4chrt25050-21/usr/sbin/munin19:20:120
2532521200,4chrt25324-21/usr/sbin/munin23:30:290
2658721190,2sleep026589-21grep21:30:260
2822421110,3sleep0288-21snmpd23:42:560
2362021100,2sleep023623-21latency_hist19:15:020
2661421050,3sleep026617-21/usr/sbin/munin23:35:320
148382970,4sleep014882-21/usr/sbin/munin20:45:260
18952930,3sleep01897-21ntpq19:55:250
302222910,3sleep030296-21sendmail_mailqu23:50:250
135722870,3sleep013570-21open_inodes20:40:250
65522850,4sleep06612-21latency_hist22:20:020
2143227521,31sleep021434-21ntp_states19:05:210
70542713,56sleep07059-21/usr/sbin/munin20:15:220
22348996426,14cyclictest32678-21latency_hist19:50:020
180782643,5sleep00-21swapper23:04:290
22348996332,22cyclictest1760-21/usr/sbin/munin00:05:290
143022630,2sleep014304-21latency_hist22:50:010
2234899629,22cyclictest10519-21/usr/sbin/munin22:35:230
2234899608,19cyclictest12119-21/usr/sbin/munin20:35:190
2234899608,17cyclictest9368-21/usr/sbin/munin20:25:150
22348996031,21cyclictest5347-21/usr/sbin/munin00:20:170
22348996022,15cyclictest21456-21runrttasks21:10:290
22348996018,15cyclictest31619-21cat23:55:250
2234899598,19cyclictest14671-21ntpq22:50:220
22348995934,16cyclictest24330-21runrttasks21:21:360
22348995934,15cyclictest28758-21/usr/sbin/munin23:45:160
2234899589,15cyclictest23449-21/usr/sbin/munin23:25:280
2234899588,18cyclictest7769-21/usr/sbin/munin00:30:170
2234899588,17cyclictest4345-21irqstats20:05:160
2234899588,16cyclictest19558-21/usr/sbin/munin23:10:300
2234899586,18cyclictest19693-21/usr/sbin/munin21:05:260
22348995835,15cyclictest3962-21/usr/sbin/munin00:15:150
22348995834,16cyclictest324-21/usr/sbin/munin21:55:180
22348995833,15cyclictest11964-21/usr/sbin/munin22:40:140
22348995832,16cyclictest27628-21/usr/sbin/munin21:35:170
302842570,4sleep030283-21forks19:40:140
2234899578,16cyclictest18544-21sshd21:00:150
2234899578,15cyclictest28748-21/usr/sbin/munin21:40:230
2234899576,16cyclictest9236-21/usr/sbin/munin22:30:130
22348995734,15cyclictest8017-21/usr/sbin/munin22:25:130
22348995733,15cyclictest18604-21/usr/sbin/munin23:05:220
22348995732,16cyclictest29083-21/usr/sbin/munin19:35:180
22348995711,16cyclictest22286-21/usr/sbin/munin23:20:150
22348995710,15cyclictest8340-21tr20:20:190
2234899568,14cyclictest6747-21/usr/sbin/munin22:20:130
2234899568,14cyclictest15958-21/usr/sbin/munin20:50:160
2234899567,16cyclictest6350irq/103-63fec0022:05:230
22348995634,14cyclictest30275-21/usr/sbin/munin21:45:170
22348995632,16cyclictest23786-21runrttasks19:15:120
22348995632,15cyclictest7536-21runrttasks00:29:110
22348995631,16cyclictest9639-21/usr/sbin/munin00:35:300
22348995630,16cyclictest31969-21runrttasks21:50:530
22348995626,21cyclictest5998-21threads20:10:270
22348995610,15cyclictest21186-21/usr/sbin/munin23:15:230
2234899559,15cyclictest15722-21df22:55:110
2234899559,14cyclictest2887-21ntp_states00:10:230
2234899558,18cyclictest22568-21ntp_states21:15:240
2234899558,16cyclictest26333-21/usr/sbin/munin19:25:290
2234899558,15cyclictest32485-21/usr/sbin/munin00:00:200
22348995531,15cyclictest28358-21runrttasks19:31:360
22348995510,16cyclictest25441-21/usr/sbin/munin21:25:280
2234899548,14cyclictest2907-21/usr/sbin/munin20:00:210
22348995430,15cyclictest17145-21runrttasks20:55:120
22348995428,17cyclictest1511-21df_inode22:00:130
22348995310,16cyclictest4075-21df22:10:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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