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2026-03-15 - 19:06

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #0

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: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System r0s0s.osadl.org (updated Sun Mar 15, 2026 12:46:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10818062312281,23sleep40-21swapper/407:07:234
10798902305274,24sleep10-21swapper/107:05:031
10816962304265,13sleep00-21swapper/007:05:510
10818172302266,12sleep60-21swapper/607:07:346
10819722299278,13sleep50-21swapper/507:09:425
10817932298260,12sleep20-21swapper/207:07:142
10818182288269,12sleep70-21swapper/707:07:347
10817002285265,13sleep30-21swapper/307:05:543
1082470993938,1cyclictest1167245-21kworker/u16:2+events_unbound10:25:232
1082474993632,3cyclictest339-21systemd-journal11:05:226
108247199355,30cyclictest1124247-21fail2ban-client08:30:123
1082474993429,4cyclictest449069-21snmpd10:11:126
108247399340,31cyclictest0-21swapper/509:26:555
1082471993433,1cyclictest1195809-21grep10:50:273
1082471993433,1cyclictest1135155-21ntpq08:50:243
1082471993432,2cyclictest1123115-21kworker/u16:2+flush-8:009:05:003
1082471993431,3cyclictest835504-21cups-browsed11:35:003
1082471993431,3cyclictest1137030-21fail2ban-client08:55:133
1082471993430,2cyclictest171rcu_preempt11:20:203
1082474993330,2cyclictest449069-21snmpd08:58:056
1082474993330,2cyclictest449069-21snmpd08:26:106
1082473993330,2cyclictest449069-21snmpd07:28:045
108247399330,31cyclictest0-21swapper/507:15:305
108247399330,30cyclictest0-21swapper/509:53:175
1082472993330,3cyclictest449069-21snmpd09:09:344
1082472993329,3cyclictest449069-21snmpd12:39:584
1082471993331,2cyclictest1142332-21kworker/u16:3+flush-8:009:20:013
1082471993331,2cyclictest1108335-21kworker/u16:3+events_unbound08:25:243
1082471993331,2cyclictest1091126-21df_inode07:25:113
1082471993330,1cyclictest1172940-21gcc10:05:253
1082469993330,2cyclictest449069-21snmpd11:39:441
1082469993330,2cyclictest449069-21snmpd10:27:491
1082475993230,2cyclictest449069-21snmpd09:13:217
1082475993230,2cyclictest449069-21snmpd09:09:287
1082475993230,2cyclictest449069-21snmpd08:30:447
1082475993230,2cyclictest449069-21snmpd07:59:037
1082475993230,2cyclictest449069-21snmpd07:28:077
1082474993230,2cyclictest449069-21snmpd08:08:566
1082474993230,2cyclictest449069-21snmpd08:08:556
1082474993229,2cyclictest449069-21snmpd07:24:516
108247499320,31cyclictest0-21swapper/608:51:396
108247499320,31cyclictest0-21swapper/608:22:286
108247499320,30cyclictest0-21swapper/609:27:406
108247399320,31cyclictest0-21swapper/512:21:455
108247399320,31cyclictest0-21swapper/509:40:225
1082472993230,1cyclictest449069-21snmpd08:49:154
1082472993230,1cyclictest1119429-21cat08:20:144
1082472993229,3cyclictest449069-21snmpd07:24:354
1082472993229,2cyclictest449069-21snmpd10:50:014
1082472993229,2cyclictest449069-21snmpd09:14:214
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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