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2026-09-05 - 21:10

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 Sat Sep 05, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21752293998,9379sleep018517-21kworker/0:109:04:140
21752293998,9379sleep018517-21kworker/0:109:04:140
69402660916,6581sleep323534-21kworker/3:210:02:333
261482150275,1410sleep026291-21apt-config07:38:330
281012149514,1468sleep318004-1kworker/3:1H11:08:493
20206278414,755sleep220216-21/usr/sbin/munin07:18:492
22010264816,615sleep122018-21/usr/sbin/munin12:33:421
4687234512,53sleep00-21swapper/011:38:320
19620234220,298sleep019768-21grep12:24:010
232922298105,175sleep023318-21grep12:38:300
230682276113,31sleep00-21swapper/009:09:030
17909226019,219sleep018022-21perl07:13:340
192772258103,38sleep019418-21unixbench_singl07:14:030
31307224113,202sleep031339-21fschecks_count07:53:510
21317223819,205sleep021385-21latency_hist10:48:310
17370221719,43sleep00-21swapper/012:18:440
5754221677,23sleep00-21swapper/009:58:470
12968221626,178sleep312999-21cut12:03:543
19068220822,169sleep119149-21/usr/sbin/munin12:23:501
30841220530,152sleep030854-21modprobe11:18:300
6183220436,155sleep26224-21systemd-run11:43:312
28675220216,164sleep028806-21timerwakeupswit11:09:060
8614219439,24sleep00-21swapper/010:08:320
15550219325,29sleep00-21swapper/012:13:310
9570219121,142sleep00-21swapper/011:53:460
5500218810,164sleep05570-21/usr/sbin/munin11:39:010
15474218510,161sleep015540-21idleruntime10:28:540
17642217916,18sleep20-21swapper/212:18:542
20675217715,27sleep00-21swapper/012:28:530
925121765,159sleep00-21swapper/008:26:450
21755217316,139sleep021769-21fschecks_count07:23:510
967721699,17sleep00-21swapper/008:28:470
13665216828,79sleep00-21swapper/008:39:040
6362216512,135sleep00-21swapper/008:18:330
308216515,111sleep00-21swapper/007:58:430
2718215815,36sleep02752-21fschecks_count09:48:540
5588215713,126sleep35648-21ls11:39:043
28529215733,109sleep028574-21ntpq07:43:580
28529215733,109sleep028574-21ntpq07:43:580
23950215713,24sleep00-21swapper/007:29:040
11312215722,27sleep00-21swapper/008:33:510
2300821560,8sleep10-21swapper/110:53:321
27312215117,118sleep327342-21cpu09:23:473
7928214616,33sleep08078-21latency_hist08:23:340
23799214623,96sleep224009-21apt-config09:13:332
24148214511,30sleep024167-21apt-get09:13:430
265492144117,16sleep026038-21apt-get07:38:410
1591621436,12sleep30-21swapper/312:13:513
1423921439,121sleep014303-21ps10:23:580
27993214114,110sleep127517-21apt-get11:08:381
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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