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2026-06-15 - 15:57

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 Mon Jun 15, 2026 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1800629748,953sleep230971-1kworker/2:1H21:58:022
8122258516,549sleep28305-21apt-config21:27:362
8122258516,549sleep28305-21apt-config21:27:362
5580237234,245sleep15635-21munin-plugin-st19:37:331
15968237211,287sleep116113-21latency_hist21:52:351
19451232426,229sleep119600-21grep23:43:051
7546232139,221sleep17628-21fschecks_time19:42:541
3177522938,269sleep131847-21mailstats20:58:031
28922228121,63sleep10-21swapper/100:12:581
16279225510,198sleep116429-21grep23:33:041
20227225310,66sleep120370-21grep22:03:061
238692246111,51sleep10-21swapper/123:57:471
13429223719,195sleep013522-21latency_hist20:02:360
4751223017,67sleep04755-21cron21:17:330
28898222945,127sleep10-21swapper/119:08:041
17676222723,91sleep117820-21gpgv21:57:361
31661222238,52sleep10-21swapper/100:22:351
29406221283,111sleep129416-21modprobe20:52:341
29406221283,111sleep129416-21modprobe20:52:341
29084221121,170sleep329221-21sed19:08:073
13081220530,55sleep10-21swapper/121:42:501
4082220341,106sleep14212-21latency_hist19:32:361
9474219330,124sleep19539-21awk19:48:031
9474219330,124sleep19539-21awk19:48:031
5689219115,122sleep10-21swapper/121:18:021
9581219040,58sleep10-21swapper/123:13:011
25421219017,159sleep025460-21ntp_kernel_pll_20:37:580
3207121877,167sleep132124-21basename19:17:541
2399021878,168sleep124047-21cat22:17:361
231021879,139sleep12389-21apt-config19:27:351
23511216634,91sleep123412-21apt-get20:33:191
400921636,145sleep10-21swapper/122:55:531
31043216112,134sleep331062-21find00:18:303
7936215927,117sleep17979-21ntpq23:07:561
26454215913,134sleep126610-21tail22:23:051
3748215823,105sleep10-21swapper/100:36:531
32698215750,45sleep10-21swapper/122:43:001
32698215750,45sleep10-21swapper/122:43:001
26957215631,112sleep127000-21tr20:42:561
1925621559,20sleep10-21swapper/122:02:331
23304215119,109sleep323367-21http23:57:333
17806215150,47sleep10-21swapper/123:38:051
27247214876,53sleep10-21swapper/100:07:571
1702214732,79sleep10-21swapper/122:47:571
11567214610,76sleep10-21swapper/123:18:141
29490214512,117sleep229611-21cat22:33:042
29072214515,115sleep229139-21awk00:13:032
1368214324,79sleep11411-21ntpq00:27:571
27877214125,64sleep127956-21switchtime22:28:061
8410213824,45sleep10-21swapper/121:27:521
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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