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2025-11-17 - 20:18

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
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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 rackbslot5s.osadl.org (updated Mon Nov 17, 2025 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3788222995325,24cyclictest0-21swapper/209:45:282
3788213995041,5cyclictest3891085-21cron12:05:000
3788225994840,4cyclictest3800896-21cron07:45:013
3788222994827,17cyclictest0-21swapper/210:55:182
3788225994736,5cyclictest0-21swapper/309:00:003
3788217994738,5cyclictest3792150-21apt-get07:20:001
3788225994635,8cyclictest391ktimers/310:45:143
3788222994636,7cyclictest3892539-21grep12:05:282
3788222994619,23cyclictest0-21swapper/211:05:192
378822299461,4cyclictest3879376-21apt-get11:30:152
3788213994636,5cyclictest3861867-21cron10:40:010
378822299452,37cyclictest3838012-21apt-get09:30:142
3788222994519,22cyclictest0-21swapper/210:30:002
3788217994538,4cyclictest3879143-21sh11:30:001
3788225994431,9cyclictest440-21cron11:30:013
378822299441,2cyclictest3881077-21apt-get11:35:142
3788217994434,6cyclictest3795306-21grep07:25:281
3788225994332,6cyclictest0-21swapper/312:40:003
3788225994332,6cyclictest0-21swapper/312:39:593
378822299431,8cyclictest3888672-21/usr/sbin/munin11:55:262
378822299431,7cyclictest3805524-21/usr/sbin/munin07:55:282
378822299429,28cyclictest3874728-21sed11:15:222
378822299421,9cyclictest3801769-21/usr/sbin/munin07:45:262
378822299421,8cyclictest3845809-21/usr/sbin/munin09:50:262
378822299421,3cyclictest3802841-21apt-get07:50:162
3788217994229,9cyclictest3901526-21apt12:35:011
3788225994133,5cyclictest3807740-21munin-plugin-st08:05:003
378822299412,35cyclictest3862375-21/usr/sbin/munin10:40:172
378822299412,34cyclictest3903220-21cron12:39:592
378822299412,34cyclictest3903220-21cron12:39:592
378822299411,9cyclictest3876486-21/usr/sbin/munin11:20:202
378822299411,7cyclictest3852634-21swap10:10:292
378822299411,6cyclictest3800009-21ntp_states07:40:252
3788222994116,22cyclictest0-21swapper/212:20:282
378822299411,37cyclictest3893571-21irqstats12:10:192
3788217994110,4cyclictest131rcu_preempt12:20:141
3788213994132,6cyclictest3810013-21fschecks_count08:10:170
3788213994128,10cyclictest121ktimers/010:50:140
3788222994019,18cyclictest0-21swapper/210:00:242
378822299401,3cyclictest3894991-21/usr/sbin/munin12:15:152
378822299401,36cyclictest3860732-21irqstats10:35:192
378822299401,34cyclictest3869777-21/usr/sbin/munin11:00:252
3788217994028,8cyclictest440-21cron07:50:001
3788225993928,8cyclictest391ktimers/312:00:143
378822299393,33cyclictest3833453-21ntp_states09:15:232
378822299392,31cyclictest3882797-21apt-get11:40:142
378822299391,8cyclictest3900463-21/usr/sbin/munin12:30:212
378822299391,7cyclictest3885372-21/usr/sbin/munin11:45:262
378822299391,7cyclictest3885372-21/usr/sbin/munin11:45:262
378822299391,7cyclictest3818042-21sshd08:33:362
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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