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2026-03-16 - 23:30

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 Mar 16, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1818121570,2sleep018185-21modprobe09:10:000
1547421370,3sleep015475-21latency_hist11:05:010
1959221240,2sleep019595-21wc11:20:170
2021121190,3chrt20212-21/usr/sbin/munin07:10:270
196709911933,13cyclictest19098-21runrttasks11:18:310
196709911830,17cyclictest31063-21runrttasks09:59:570
3127321170,4chrt31271-21ls12:05:180
196709911730,15cyclictest12556-21runrttasks10:52:470
196709911729,16cyclictest1615-21/usr/sbin/munin08:05:150
196709911726,15cyclictest27689-21timerandwakeup11:50:270
196709911631,14cyclictest23305-21runrttasks09:29:390
196709911628,15cyclictest8718-21runrttasks10:38:070
196709911628,14cyclictest21608-21runrttasks11:27:440
196709911626,15cyclictest31368-21runrttasks07:55:060
196709911626,15cyclictest28624-21runrttasks09:50:030
196709911624,14cyclictest285-21sshd09:37:330
196709911529,14cyclictest9803-21runrttasks10:41:130
196709911528,14cyclictest4977-21latency_hist12:30:020
196709911528,14cyclictest3573-21runrttasks08:11:500
196709911511,21cyclictest15839-21ntp_states11:05:220
196709911430,15cyclictest17730-21runrttasks11:12:530
196709911427,14cyclictest6328-21/usr/sbin/munin12:35:140
196709911426,15cyclictest28741-21runrttasks11:55:210
196709911426,14cyclictest1248-21runrttasks08:03:510
196709911425,17cyclictest3416-21runrttasks10:16:580
196709911425,16cyclictest3498-21runrttasks12:23:540
196709911423,15cyclictest10387-21munin-node10:45:100
19670991139,29cyclictest25891-21/usr/sbin/munin11:45:160
196709911323,16cyclictest9308-21runrttasks08:35:110
196709911323,14cyclictest28898-21fw_packets07:45:150
19670991127,30cyclictest22011-21/usr/sbin/munin11:30:190
196709911229,14cyclictest30588-21runrttasks12:02:130
196709911226,15cyclictest25539-21runrttasks11:43:130
196709911213,18cyclictest1161-21/usr/sbin/munin12:15:310
19670991117,14cyclictest32339-21/usr/sbin/munin12:10:240
196709911129,13cyclictest28322-21runrttasks07:42:000
196709911128,15cyclictest28182-21runrttasks09:47:190
196709911124,15cyclictest13821-21runrttasks10:57:390
196709911110,21cyclictest6983-21ntp_states08:25:230
196709911024,13cyclictest946-21ntpd08:40:210
196709911011,18cyclictest16334-21chrt09:00:310
196709910923,15cyclictest24200-21runrttasks09:31:240
196709910923,14cyclictest32240-21runrttasks10:03:460
2129521080,3chrt21298-21netstat07:15:180
19670991089,16cyclictest7679-21modprobe10:34:590
196709910825,14cyclictest22719-21proc_pri07:20:250
196709910824,13cyclictest27316-21runrttasks07:39:340
196709910812,16cyclictest6498-21sshd08:24:320
19670991078,14cyclictest3948-21/usr/sbin/munin10:20:150
19670991077,15cyclictest31261-21munin-run07:55:000
196709910726,12cyclictest26074-21/usr/sbin/munin09:40:230
196709910725,13cyclictest32681-21runrttasks10:05:160
196709910713,22cyclictest5230-21/usr/sbin/munin10:25:130
196709910713,14cyclictest5044-21cpu12:30:090
196709910712,20cyclictest14697-21ntp_states08:55:220
19670991067,14cyclictest25406-21/usr/sbin/munin07:30:250
196709910621,15cyclictest19722-21if_eth009:15:140
196709910611,15cyclictest13377-21/usr/sbin/munin08:50:200
19670991058,14cyclictest8015-21/usr/sbin/munin08:30:100
19670991058,14cyclictest276-21runrttasks11:37:530
19670991049,14cyclictest23943-21ntp_states07:25:230
196709910418,14cyclictest19746-21latency_hist07:10:020
19670991037,12cyclictest192112chrt09:12:560
196709910324,12cyclictest5147-21runrttasks08:19:130
19670991027,14cyclictest12038-21memory08:45:180
19670991018,13cyclictest21648-21sshd09:21:320
19670991007,13cyclictest1643-21ntpq10:10:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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