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2026-05-31 - 22:05

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 792 highest latencies:
System rack4slot6s.osadl.org (updated Sun May 31, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2143022730,3sleep021431-21cat10:45:150
1221722530,3sleep012216-21latency_hist10:10:020
202122410,2sleep02019-21df_inode09:30:100
627722150,2sleep06275-21ntpq07:40:200
1001422100,2sleep010012-21irqstats07:55:170
2298221220,3chrt22980-21memory08:45:170
2938621200,3chrt29385-21/usr/sbin/munin09:10:160
2765721120,3chrt27658-21idleruntime-cro11:10:000
222621120,3sleep02225-21awk11:35:280
740021110,2sleep07403-21cut11:55:250
104621070,3sleep01063-21/usr/sbin/munin07:20:180
463221050,3sleep04669-21if_eth009:40:140
2560621030,4sleep025654-21mailstats11:00:250
305942970,3sleep030600-21df_inode09:15:130
143672947,12sleep014368-21sshd08:10:340
145552915,10sleep014556-21sshd10:18:340
174922870,4sleep017534-21/usr/sbin/munin12:35:210
32902810,3sleep03305-21munin-plugin-st07:30:010
188772797,59sleep018886-21irqstats10:35:180
2974127419,31sleep029811-21/usr/sbin/munin07:05:230
254492716,52sleep025501-21irqstats08:55:160
8792660,3sleep0880-21cat09:25:180
30620996432,22cyclictest15291-21/usr/sbin/munin08:15:200
30620996116,14cyclictest6350irq/103-63fec0009:55:000
242672613,49sleep00-21swapper08:50:200
3062099609,18cyclictest16402-21df08:20:120
30620996013,15cyclictest9824-21if_err_eth010:00:160
3062099599,18cyclictest3167-21/usr/sbin/munin11:40:130
3062099599,15cyclictest24183-21ntp_states10:55:220
3062099599,15cyclictest12286-21/usr/sbin/munin10:10:230
30620995935,15cyclictest4955-21/usr/sbin/munin07:35:200
30620995933,17cyclictest8594-21runrttasks09:55:170
30620995933,16cyclictest32572-21runrttasks09:21:210
30620995911,16cyclictest17979-21/usr/sbin/munin08:25:250
3062099589,22cyclictest7372-21/usr/sbin/munin07:45:160
3062099589,15cyclictest13085-21sshd12:18:350
3062099587,18cyclictest16468-21ntp_states10:25:220
30620995834,16cyclictest8370-21/usr/sbin/munin12:00:130
30620995834,15cyclictest32260-21/usr/sbin/munin07:15:190
30620995833,15cyclictest17787-21/usr/sbin/munin10:30:250
30620995810,15cyclictest29062-21/usr/sbin/munin11:15:270
3062099578,15cyclictest21560-21awk08:40:120
3062099578,15cyclictest20200-21/usr/sbin/munin08:35:200
3062099577,17cyclictest18922-21/usr/sbin/munin08:30:200
30620995734,14cyclictest20147-21/usr/sbin/munin10:40:150
30620995734,14cyclictest1008-21/usr/sbin/munin11:30:270
30620995733,16cyclictest5733-21/usr/sbin/munin11:50:140
30620995733,16cyclictest27259-21/usr/sbin/munin09:00:290
30620995733,14cyclictest15386-21/usr/sbin/munin10:20:270
30620995730,17cyclictest16239-21/usr/sbin/munin12:30:180
30620995730,17cyclictest14841-21/usr/sbin/munin12:25:160
30620995729,16cyclictest9611-21/usr/sbin/munin12:05:160
30620995710,14cyclictest12940-21/usr/sbin/munin08:05:280
3062099569,19cyclictest3423-21ls09:35:180
3062099569,17cyclictest3690-21awk07:30:200
3062099567,17cyclictest13475-21/usr/sbin/munin12:20:120
30620995634,15cyclictest32114-21runrttasks11:25:260
30620995633,14cyclictest4725-21/usr/sbin/munin11:45:250
30620995632,15cyclictest9115-21/usr/sbin/munin07:50:260
30620995632,15cyclictest27971-21/usr/sbin/munin11:10:170
30620995630,17cyclictest30672-21runrttasks11:20:190
30620995630,15cyclictest6022-21/usr/sbin/munin09:45:180
3062099559,18cyclictest11495-21seq08:00:240
3062099559,15cyclictest27961-21/usr/sbin/munin09:05:200
3062099558,14cyclictest10817-21/usr/sbin/munin12:10:280
30620995431,15cyclictest23329-21runrttasks10:51:230
30620995430,15cyclictest31014-21ntp_states07:10:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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