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2026-05-19 - 11:31

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #5

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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  Phytec
Click here to display the system's profile data or here to proceed to next system.
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 100 highest latencies:
System rackbslot5s.osadl.org (updated Tue May 19, 2026 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1541809995345,6cyclictest1576342-21kworker/u8:0+events_unbound20:52:072
1541809995336,11cyclictest311ktimers/220:05:122
1541809995242,7cyclictest1543567-21munin-plugin-st19:15:012
1541807995042,5cyclictest1639978-21unixbench_multi23:50:260
1541810994939,7cyclictest1628101-21sendmail23:20:003
1541809994943,4cyclictest1638450-21kworker/u8:2+events_unbound23:47:362
1541807994919,4cyclictest131rcu_preempt22:45:120
1541810994536,4cyclictest0-21swapper/320:20:133
1541809994539,4cyclictest1638450-21kworker/u8:2+events_unbound23:57:382
1541809994537,6cyclictest1636517-21kworker/u8:1+events_unbound00:02:392
1541807994515,6cyclictest131rcu_preempt00:30:110
1541809994419,10cyclictest131rcu_preempt20:43:262
1541807994436,4cyclictest1642383-21idleruntime-cro00:00:010
1541807994334,5cyclictest1649834-21sendmail00:20:010
1541810994232,7cyclictest1564906-21fschecks_count20:15:143
1541810994228,10cyclictest1625950-21grep23:10:263
1541810994222,13cyclictest131rcu_preempt19:30:193
1541807994230,6cyclictest0-21swapper/021:15:000
1541810994121,6cyclictest131rcu_preempt22:55:013
1541809994135,4cyclictest1597084-21kworker/u8:1+events_unbound22:02:192
1541807994134,5cyclictest1450230-21kworker/u8:2+events_unbound19:26:580
1541807994132,6cyclictest1552987-21fschecks_count19:40:180
1541807994132,6cyclictest1552987-21fschecks_count19:40:180
1541810994029,7cyclictest1583056-21grep21:05:263
1541809994022,11cyclictest131rcu_preempt21:40:212
1541808994032,4cyclictest1611036-21ls22:30:001
1541810993931,4cyclictest0-21swapper/321:25:153
1541810993920,11cyclictest131rcu_preempt19:35:373
1541810993920,11cyclictest131rcu_preempt19:35:363
1541810993918,18cyclictest391ktimers/300:26:403
1541809993933,4cyclictest1614293-21kworker/u8:3+events_unbound23:12:282
1541809993933,4cyclictest1563054-21kworker/u8:3+events_unbound20:27:042
1541807993927,6cyclictest0-21swapper/023:15:010
1541807993919,11cyclictest131rcu_preempt21:50:110
154180999383,6cyclictest32-21ksoftirqd/221:50:102
1541809993832,4cyclictest1543123-21kworker/u8:3+events_unbound19:21:582
1541809993831,4cyclictest1541805-21cyclictest20:50:022
154180799389,5cyclictest131rcu_preempt22:00:140
1541807993832,4cyclictest1612369-21kworker/u8:1+events_unbound22:37:280
1541807993831,4cyclictest0-21swapper/023:20:000
1541807993825,8cyclictest0-21swapper/020:55:260
1541810993727,7cyclictest1574371-21grep20:40:253
1541809993731,4cyclictest1645746-21kworker/u8:2+events_unbound00:07:412
1541809993730,4cyclictest0-21swapper/223:20:002
1541809993727,7cyclictest1581810-21sh21:05:012
1541809993727,7cyclictest0-21swapper/219:20:002
1541809993727,7cyclictest0-21swapper/219:20:002
1541809993716,9cyclictest131rcu_preempt19:50:322
1541809993716,5cyclictest131rcu_preempt00:23:232
1541808993730,5cyclictest1607617-21munin-plugin-st22:20:011
1541807993726,6cyclictest0-21swapper/000:05:260
1541810993629,4cyclictest1576488-21latency_hist20:50:003
1541810993625,8cyclictest1630008-21debian-sa123:25:013
1541810993624,8cyclictest391ktimers/319:15:043
1541810993624,8cyclictest391ktimers/319:15:043
1541810993620,5cyclictest131rcu_preempt22:45:263
1541810993619,9cyclictest131rcu_preempt20:12:243
1541810993619,3cyclictest131rcu_preempt22:15:023
1541809993630,4cyclictest1583175-21kworker/u8:1+events_unbound21:12:112
1541809993629,5cyclictest1583175-21kworker/u8:1+events_unbound21:08:412
1541809993628,5cyclictest1556006-21cron19:50:002
1541809993623,5cyclictest131rcu_preempt22:45:142
1541809993621,4cyclictest131rcu_preempt23:30:332
1541809993620,5cyclictest131rcu_preempt22:53:012
1541809993618,4cyclictest131rcu_preempt20:21:402
1541807993626,6cyclictest0-21swapper/019:10:250
1541807993617,6cyclictest1649678-21kworker/u8:0+events_unbound00:22:000
1541807993614,10cyclictest131rcu_preempt21:35:230
1541810993525,4cyclictest131rcu_preempt21:57:073
1541809993529,4cyclictest645-21runrttasks21:20:102
1541809993526,5cyclictest301rcuc/220:40:002
1541809993520,5cyclictest131rcu_preempt23:25:572
1541809993519,5cyclictest131rcu_preempt20:05:022
1541809993516,5cyclictest131rcu_preempt23:00:012
1541809993515,5cyclictest131rcu_preempt21:35:232
1541809993514,5cyclictest131rcu_preempt19:35:232
1541809993514,5cyclictest131rcu_preempt19:35:222
1541808993527,4cyclictest0-21swapper/119:20:011
1541808993527,4cyclictest0-21swapper/119:20:001
1541808993525,7cyclictest0-21swapper/121:40:151
1541808993525,6cyclictest0-21swapper/121:50:011
1541808993524,7cyclictest1602055-21grep22:00:271
1541807993529,4cyclictest1633184-21kworker/u8:3+events_unbound23:32:330
1541807993525,6cyclictest0-21swapper/000:05:000
1541807993524,6cyclictest0-21swapper/022:10:250
1541807993524,6cyclictest0-21swapper/021:55:250
1541807993523,9cyclictest121ktimers/022:30:130
1541810993426,4cyclictest0-21swapper/321:30:253
1541810993421,4cyclictest131rcu_preempt22:43:053
1541810993420,8cyclictest131rcu_preempt19:14:383
1541810993419,9cyclictest131rcu_preempt22:05:053
1541810993410,5cyclictest131rcu_preempt21:20:173
1541809993425,6cyclictest0-21swapper/223:40:012
1541809993422,8cyclictest301rcuc/223:40:232
1541809993417,5cyclictest131rcu_preempt00:10:352
1541809993416,5cyclictest131rcu_preempt22:05:162
1541809993416,5cyclictest131rcu_preempt21:30:192
1541809993416,5cyclictest131rcu_preempt20:30:202
1541809993416,11cyclictest131rcu_preempt00:25:162
1541809993415,4cyclictest131rcu_preempt21:19:462
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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