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2026-05-25 - 18:10

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 100 highest latencies:
System rack4slot6s.osadl.org (updated Mon May 25, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29053991268,20cyclictest13147-21/usr/sbin/munin12:25:180
1354021260,4chrt13539-21/usr/sbin/munin10:20:200
290539912432,13cyclictest32017-21runrttasks11:30:360
1779521240,4chrt17794-21/usr/sbin/munin08:30:270
1205621240,3chrt11864-21/usr/sbin/munin12:20:190
290539912329,14cyclictest29098-21/usr/sbin/munin11:20:210
290539912130,14cyclictest17533-21/usr/sbin/munin10:35:240
290539912028,15cyclictest3995-21runrttasks07:37:300
290539911829,13cyclictest21386-21/usr/sbin/munin10:50:240
290539911723,16cyclictest24045-21/usr/sbin/munin11:00:250
29053991169,17cyclictest26456-21df_inode09:05:130
290539911630,15cyclictest15535-21runrttasks08:21:380
290539911624,16cyclictest9915-21runrttasks12:10:520
632721150,4chrt6325-21uptime07:45:280
290539911520,14cyclictest21910-21runrttasks08:46:050
29053991148,17cyclictest26820-21/usr/sbin/munin11:10:290
290539911429,14cyclictest5211-21runrttasks07:41:430
290539911429,13cyclictest31571-21runrttasks09:25:080
290539911428,15cyclictest9009-21runrttasks12:09:010
290539911427,14cyclictest28665-21cron11:19:590
290539911426,16cyclictest14370-21runrttasks08:17:510
290539911413,18cyclictest15902-21memory12:35:200
290539911410,16cyclictest28922-21ls09:15:010
290539911327,15cyclictest209-21dbus-daemon11:35:240
290539911327,14cyclictest13180-21runrttasks08:13:420
290539911326,15cyclictest3921-21runrttasks11:49:400
290539911325,15cyclictest387-21runrttasks09:30:060
290539911324,15cyclictest19872-21runrttasks08:40:020
290539911321,17cyclictest877-21ntpq07:25:240
290539911313,23cyclictest12188-21cat10:15:160
290539911312,21cyclictest29346-21memory07:10:190
290539911226,14cyclictest26118-21runrttasks09:03:470
290539911224,14cyclictest15295-21runrttasks12:32:370
290539911222,15cyclictest4808-21runrttasks11:51:220
290539911221,13cyclictest15462-21sshd10:27:290
290539911212,19cyclictest16362-21ntp_states08:25:230
29053991117,26cyclictest22337-21/usr/sbin/munin10:55:140
290539911127,15cyclictest8091-21runrttasks07:54:210
290539911124,16cyclictest16370-21runrttasks10:30:270
290539911122,15cyclictest20419-21runrttasks10:45:480
290539911121,14cyclictest10173-21sshd10:06:290
290539911118,16cyclictest20677-21sshd08:41:300
290539911114,18cyclictest4282-21/usr/sbin/munin09:45:320
290539911112,18cyclictest8209-21df10:00:120
29053991108,16cyclictest31616-21idleruntime-cro07:20:000
290539911027,14cyclictest2911-21latency_hist09:40:020
290539911011,21cyclictest8559-21ntpq07:55:180
290539911011,17cyclictest25509-21wc11:05:290
29053991099,19cyclictest5370-21seq11:55:080
29053991099,18cyclictest11192-21ntp_states08:05:220
29053991099,17cyclictest30675-21/usr/sbin/munin11:25:260
29053991099,16cyclictest31946-21memory07:20:180
290539910923,17cyclictest24577-21runrttasks08:56:560
290539910922,15cyclictest10724-21runrttasks08:04:370
290539910921,15cyclictest11403-21runrttasks12:17:300
290539910913,19cyclictest30890-21users09:20:300
290539910911,20cyclictest23111-21users08:50:300
290539910911,17cyclictest3139-21irqstats09:40:160
29053991089,19cyclictest1677-21/usr/sbin/munin11:40:180
290539910826,15cyclictest6877-21/usr/sbin/munin12:00:180
290539910822,14cyclictest11155-21mailstats10:10:260
290539910821,15cyclictest29492-21/usr/sbin/munin09:15:280
29053991078,18cyclictest1863-21/usr/sbin/munin07:30:140
29053991067,11cyclictest29089-21latency_hist07:10:010
290539910610,19cyclictest6893-21df09:55:120
290539910610,17cyclictest5755-21memory09:50:190
29053991049,17cyclictest19338-21sshd10:42:290
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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