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2026-05-15 - 00:02

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #7

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 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.

Note that this system runs a non-RT kernel.
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 rackbslot7s.osadl.org (updated Thu May 14, 2026 12:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
151732133216,1299sleep115182-21/usr/sbin/munin12:34:271
26421293921,901sleep324629-21kworker/u8:309:44:493
884327607,740sleep38879-21ntpq10:29:593
884327607,740sleep38879-21ntpq10:29:593
2520926358,613sleep025167-21apt-get08:00:030
18406257128,507sleep318476-21unin-run07:39:263
18406257128,507sleep318476-21unin-run07:39:263
7122251513,487sleep27130-21ntpq10:24:542
4366248621,449sleep24382-21/usr/sbin/munin08:34:502
4366248621,449sleep24382-21/usr/sbin/munin08:34:502
1011424670,7sleep20-21swapper/210:34:462
1660924518,429sleep316653-21ntpq10:54:513
26387244227,394sleep026403-21apt-get09:44:380
8051239924,357sleep28094-21/usr/sbin/munin12:10:092
1909623980,11sleep00-21swapper/007:39:590
3015223969,372sleep030190-21ntpq09:54:550
3015223969,372sleep030190-21ntpq09:54:550
71312364132,212sleep37171-21processes10:24:553
22442232713,249sleep322543-21timerandwakeup07:50:083
22442232713,249sleep322543-21timerandwakeup07:50:083
1124223169,292sleep311364-21cat08:54:583
1124223169,292sleep311364-21cat08:54:583
9004229016,175sleep39007-21apt-get08:49:373
20630229087,184sleep320785-21unixbench_multi09:24:583
25358226210,191sleep325429-21cat11:24:273
23070224219,208sleep123121-21unin-run07:54:261
23070224219,208sleep123121-21unin-run07:54:261
31753223622,192sleep231796-21fschecks_count08:19:482
28498223229,23sleep30-21swapper/309:49:533
28498223229,23sleep30-21swapper/309:49:533
463223012,170sleep3476-21idleruntime-cro08:24:253
20691222741,21sleep30-21swapper/311:09:293
16056222054,21sleep30-21swapper/307:30:093
13046221613,186sleep313179-21grep12:24:563
2017221312,180sleep32020-21cron08:29:263
16866220315,22sleep20-21swapper/209:14:442
16866220315,22sleep20-21swapper/209:14:442
16680219933,126sleep316720-21sendmail12:39:263
16680219933,126sleep316720-21sendmail12:39:263
3077221980,90sleep38485-21cyclictest08:14:553
3077221980,90sleep38485-21cyclictest08:14:553
185512198114,17sleep30-21swapper/309:19:453
10860219670,18sleep30-21swapper/307:14:473
12522219327,19sleep30-21swapper/307:19:473
7098218811,160sleep37147-21apt-config12:09:253
8807218035,18sleep30-21swapper/307:09:463
8807218035,18sleep30-21swapper/307:09:463
26923216627,101sleep326965-21cat08:04:463
25272216617,128sleep30-21swapper/308:00:143
7620215910,109sleep37617-21apt-get12:09:383
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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