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2026-06-15 - 17:13

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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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 Mon Jun 15, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1001722540,3sleep010015-21df_inode12:30:120
285859913434,14cyclictest14661-21/usr/sbin/munin08:20:250
185921300,4chrt1858-21swap07:30:230
1161421260,3chrt11615-21latency10:30:170
285859912533,15cyclictest15876-21/usr/sbin/munin08:25:210
285859912132,16cyclictest11028-21/usr/sbin/munin08:05:290
3088521170,3chrt30884-21/usr/sbin/munin11:45:130
285859911327,15cyclictest19627-21/usr/sbin/munin08:40:170
28585991128,18cyclictest29678-21idleruntime-cro09:20:010
285859911230,14cyclictest9334-21/usr/sbin/munin08:00:180
28585991098,16cyclictest31289-21/usr/sbin/munin07:20:250
285859910910,16cyclictest216-21rs:main0
28585991079,14cyclictest7589-21df10:15:070
28585991078,16cyclictest24858-21cat09:00:200
28585991078,15cyclictest26846-21sshd09:08:060
285859910628,15cyclictest5053-21runrttasks10:01:580
285859910610,16cyclictest9532-21seq10:20:570
28585991059,16cyclictest1956-21/usr/sbin/munin09:45:210
28585991049,15cyclictest12413-21/usr/sbin/munin12:40:020
431421020,4sleep04382-21/usr/sbin/munin07:40:230
72282850,2sleep07250-21ls12:20:010
230352820,4sleep023036-21munin-node11:15:100
57812790,3sleep05784-21switchtime07:45:270
2738827520,30sleep027438-21df07:05:110
2858599619,20cyclictest17871-21/usr/sbin/munin10:55:140
28585996135,15cyclictest12180-21/usr/sbin/munin08:10:250
28585996124,13cyclictest4464-21runrttasks09:58:160
28585996110,16cyclictest32288-21sshd09:34:050
28585996033,16cyclictest21836-21/usr/sbin/munin11:10:130
28585996017,14cyclictest21073-21runrttasks08:45:220
287482590,2sleep028749-21df_inode07:10:120
2858599599,15cyclictest27218-21/usr/sbin/munin09:10:230
28585995911,17cyclictest24495-21munin-run09:00:000
2858599589,18cyclictest32084-21/usr/sbin/munin11:50:240
2858599589,16cyclictest10153-21/usr/sbin/munin10:25:290
2858599589,15cyclictest6556-21/usr/sbin/munin07:50:190
2858599588,18cyclictest14184-21sendmail08:20:000
28585995834,15cyclictest978-21/usr/sbin/munin11:55:130
28585995833,17cyclictest27862-21runrttasks11:33:170
28585995832,17cyclictest19967-21runrttasks11:01:540
28585995810,17cyclictest288-21snmpd11:05:380
2858599579,16cyclictest12713-21/usr/sbin/munin10:35:160
2858599579,15cyclictest15312-21/usr/sbin/munin10:45:290
2858599579,15cyclictest1407-21munin-run09:45:000
2858599579,15cyclictest14029-21/usr/sbin/munin10:40:310
2858599578,16cyclictest24356-21/usr/sbin/munin11:20:300
2858599578,14cyclictest25637-21/usr/sbin/munin11:25:250
28585995733,15cyclictest17156-21/usr/sbin/munin10:50:270
28585995731,16cyclictest3091-21runrttasks12:02:380
2858599569,17cyclictest29380-21munin-run11:40:000
2858599568,16cyclictest7837-21/usr/sbin/munin07:55:160
2858599568,16cyclictest5553-21/usr/sbin/munin10:05:200
2858599568,14cyclictest22231-21memory08:50:170
28585995631,17cyclictest3824-21/usr/sbin/munin12:05:240
28585995626,21cyclictest3949-21latency_hist07:40:020
2858599558,15cyclictest29518-21/usr/sbin/munin11:40:190
2858599558,14cyclictest7394-21/usr/sbin/munin12:20:140
2858599557,16cyclictest30256-21chrt07:15:190
28585995529,15cyclictest5395-21/usr/sbin/munin12:10:280
28585995513,15cyclictest299552chrt09:21:130
2858599547,16cyclictest32575-21/usr/sbin/munin07:25:150
2858599547,15cyclictest18165-21/usr/sbin/munin08:35:130
28585995433,13cyclictest2943-21runrttasks09:51:180
28585995431,15cyclictest30668-21runrttasks09:26:150
28585995329,15cyclictest365-21runrttasks09:37:400
28585995329,15cyclictest17171-21/usr/sbin/munin08:30:220
28585995230,14cyclictest6917-21runrttasks10:10:510
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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