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2026-09-23 - 21:17

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 Wed Sep 23, 2026 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3099122320,3sleep030990-21tr11:35:210
1792822320,4sleep017924-21cat08:40:020
1063621650,3sleep010635-21wc08:10:250
1011221220,4chrt10110-21df_inode10:15:120
1001621190,3chrt10018-21if_eth012:20:140
387121150,2sleep03870-21ntp_kernel_pll_09:50:230
1378021150,3chrt13783-21cpu12:35:100
271009910980,17cyclictest21952-21/usr/sbin/munin08:55:170
271009910879,17cyclictest27159-21ntpq11:20:210
925021070,4sleep08954-21/usr/sbin/munin08:05:260
271009910678,17cyclictest6746-21/usr/sbin/munin07:55:250
271009910678,15cyclictest7701-21ls10:05:170
271009910676,17cyclictest5065-21/usr/sbin/munin07:50:130
271009910675,22cyclictest17355-21chrt10:42:180
271009910674,21cyclictest5527-21seq09:55:460
271009910578,14cyclictest7970-21/usr/sbin/munin08:00:210
271009910575,18cyclictest13053-21/usr/sbin/munin10:25:250
271009910478,15cyclictest19097-21chrt08:44:370
271009910378,13cyclictest2427-21ntp_states11:50:260
271009910376,15cyclictest28921-21/usr/sbin/munin07:15:250
271009910375,15cyclictest26138-21/usr/sbin/munin11:15:300
364721020,4sleep03662-21munin-run07:45:000
271009910266,12cyclictest276-21runrttasks07:39:270
271009910176,14cyclictest4589-21/usr/sbin/munin12:00:010
271009910175,16cyclictest14079-21date08:25:010
271009910175,14cyclictest15376-21sed08:30:010
271009910174,16cyclictest21139-21chrt10:56:450
271009910174,16cyclictest12022-21runrttasks10:20:490
271009910173,17cyclictest4786-21runrttasks12:00:140
2839521000,4sleep028399-21df09:20:130
271009910076,12cyclictest11579-21/usr/sbin/munin12:25:250
271009910074,15cyclictest32176-21irqstats11:40:170
271009910073,16cyclictest8976-21wc10:10:210
271009910073,16cyclictest15813-21users10:35:290
271009910072,17cyclictest32371-21/usr/sbin/munin07:30:300
271009910071,17cyclictest30714-21seq07:23:010
271009910068,20cyclictest13627-21idleruntime-cro12:35:000
271009910056,19cyclictest12157-21sshd08:15:480
27100999975,14cyclictest276-21runrttasks09:37:050
27100999975,14cyclictest22456-21chrt11:01:450
27100999974,15cyclictest30880-21cat09:30:010
27100999974,14cyclictest7743-21mailstats12:10:300
27100999974,14cyclictest3970-21/usr/sbin/munin07:45:170
27100999973,15cyclictest20292-21latency_hist10:55:010
27100999973,14cyclictest3124-21chrt09:47:060
27100999971,16cyclictest23316-21/usr/sbin/munin09:00:180
27100999970,21cyclictest24330-21df_inode11:10:170
27100999966,20cyclictest13949-21/usr/sbin/munin10:30:330
27100999873,14cyclictest6654-21seq12:05:450
27100999873,14cyclictest18099-21ntp_states10:45:210
27100999869,17cyclictest23263-21ntp_states11:05:220
27100999775,13cyclictest28592-21/usr/sbin/munin11:25:260
27100999774,14cyclictest1290-21awk11:45:250
27100999774,13cyclictest276-21runrttasks09:14:420
27100999773,15cyclictest30521-21seq11:34:290
27100999773,15cyclictest27387-21memory07:10:170
27100999770,15cyclictest6785-21/usr/sbin/munin10:00:290
27100999757,14cyclictest1325-21ntp_states09:40:210
27100999673,13cyclictest20619-21df_inode08:50:130
27100999673,13cyclictest20309-21chrt08:49:010
27100999662,21cyclictest8582-21/usr/sbin/munin12:15:140
27100999572,15cyclictest32155-21runrttasks07:29:210
27100999572,14cyclictest27081-21df_inode09:15:130
27100999470,15cyclictest16264-21chrt08:32:370
27100999464,17cyclictest24711-21ntp_kernel_pll_09:05:210
27100999363,18cyclictest30913-21/usr/sbin/munin09:30:280
27100998964,13cyclictest288-21snmpd07:10:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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