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2026-05-26 - 20:06

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 Tue May 26, 2026 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3095522530,2sleep030956-21processes11:15:250
333021540,2sleep03333-21latency_hist09:30:000
291372950,4sleep0205-21cron11:10:000
160862950,3sleep016138-21latency_hist12:25:010
204052930,3sleep020455-21sh08:30:110
287392920,4sleep028751-21users09:00:290
93252900,4sleep09337-21/usr/sbin/munin07:45:300
256452880,3sleep025672-21/usr/sbin/munin10:55:190
311532870,3sleep031182-21awk07:05:230
11662840,3sleep01172-21missed_timers07:15:180
32060997249,14cyclictest9088-21runrttasks11:55:540
165522690,3sleep016553-21processes12:25:220
32060996411,17cyclictest5745-21munin-run11:45:000
32060996410,16cyclictest16035-21sshd10:18:270
32060996232,17cyclictest11814-21vmstat10:00:290
3206099609,17cyclictest8613-21/usr/sbin/munin09:50:270
32060996038,14cyclictest13343-21runrttasks08:01:010
32060996036,15cyclictest3858-21/usr/sbin/munin07:25:200
32060996035,16cyclictest7773-21/usr/sbin/munin07:40:230
32060996033,18cyclictest0-21swapper08:15:100
3206099598,16cyclictest26704-21/usr/sbin/munin11:00:170
32060995936,14cyclictest23266-21/usr/sbin/munin08:40:190
32060995931,17cyclictest19686-21/usr/sbin/munin08:25:290
32060995910,20cyclictest29496-21df09:05:100
3206099589,34cyclictest17533-21df12:30:130
3206099589,18cyclictest19105-21seq12:35:230
3206099589,17cyclictest17835-21/usr/sbin/munin08:20:210
3206099588,16cyclictest3565-21ntp_states11:35:230
3206099587,18cyclictest21689-21/usr/sbin/munin08:35:260
32060995835,15cyclictest10077-21/usr/sbin/munin09:55:160
32060995834,15cyclictest12647-21/usr/sbin/munin12:10:250
32060995833,15cyclictest27158-21/usr/sbin/munin08:55:220
32060995832,17cyclictest5255-21/usr/sbin/munin09:35:270
3206099579,16cyclictest746-21df11:25:100
3206099579,15cyclictest21544-21/usr/sbin/munin10:40:310
3206099578,23cyclictest12793-21ntp_states10:05:250
3206099578,17cyclictest17665-21/usr/sbin/munin10:25:160
3206099578,15cyclictest18949-21/usr/sbin/munin10:30:140
3206099576,17cyclictest13781-21/usr/sbin/munin10:10:290
32060995734,15cyclictest9823-21/usr/sbin/munin12:00:140
32060995734,15cyclictest24795-21/usr/sbin/munin08:45:270
32060995734,14cyclictest32440-21/usr/sbin/munin07:10:200
32060995732,16cyclictest6632-21/usr/sbin/munin09:40:270
32060995730,16cyclictest16649-21/usr/sbin/munin10:20:190
32060995728,17cyclictest5461-21users07:30:290
3206099569,15cyclictest24253-21irqstats10:50:170
3206099569,15cyclictest13959-21/usr/sbin/munin08:05:300
3206099568,16cyclictest2351-21df07:20:120
3206099568,15cyclictest25566-21/usr/sbin/munin08:50:310
32060995631,14cyclictest7558-21/usr/sbin/munin11:50:260
32060995626,19cyclictest2287-21/usr/sbin/munin11:30:230
32060995610,16cyclictest31944-21/usr/sbin/munin11:20:130
3206099558,18cyclictest20458-21netstat10:35:200
3206099557,14cyclictest3714-21ntp_kernel_pll_09:30:200
32060995532,14cyclictest30826-21/usr/sbin/munin09:10:140
32060995531,16cyclictest23833-21runrttasks10:48:500
32060995531,15cyclictest32089-21/usr/sbin/munin09:15:130
32060995531,15cyclictest11222-21/usr/sbin/munin12:05:180
32060995530,15cyclictest6547-21/usr/sbin/munin07:35:250
32060995529,15cyclictest11381-21/usr/sbin/munin07:55:130
32060995526,17cyclictest1317-21grep09:20:260
3206099549,13cyclictest29790-21awk11:10:270
32060995431,14cyclictest10421-21/usr/sbin/munin07:50:240
32060995430,17cyclictest15532-21runrttasks08:10:230
32060995429,15cyclictest8450-21seq09:49:450
32060995429,15cyclictest6556-21runrttasks11:46:120
32060995113,15cyclictest135962chrt12:15:100
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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