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2026-09-15 - 02:11

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 Sep 14, 2026 12:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1241721123224,11164sleep010585-21kworker/0:212:08:070
259572356613,3538sleep021808-21kworker/0:211:08:240
166012133619,1305sleep316603-21kworker/3:008:56:593
12839266717,634sleep112874-21/usr/sbin/munin12:08:211
28875245611,432sleep228321-21kworker/u8:311:18:152
51162276105,52sleep30-21swapper/310:03:183
1015224431,188sleep31036-21modprobe11:32:583
1015224431,188sleep31036-21modprobe11:32:583
980022396,198sleep39875-21find08:33:293
3628223815,208sleep33774-21unixbench_singl11:38:313
18467223011,206sleep318492-21awk07:18:233
7407222868,68sleep37371-21latency_hist08:28:003
5739222024,145sleep35826-21latency_hist11:48:003
16783221616,40sleep30-21swapper/307:13:223
25575220914,179sleep025623-21unin-run07:42:590
17220220948,27sleep30-21swapper/312:23:173
17220220948,27sleep30-21swapper/312:23:173
29873220533,151sleep329986-21timerwakeupswit07:53:363
22481220413,166sleep322561-21fschecks_time10:58:183
21822219214,163sleep321941-21expr07:28:283
28177219111,158sleep327384-21/usr/sbin/munin07:48:313
24883218920,154sleep024917-21fschecks_count09:23:170
24883218920,154sleep024917-21fschecks_count09:23:170
15851218011,115sleep315912-21basename10:37:583
13007218016,148sleep213085-21sed12:08:262
1407217622,76sleep30-21swapper/309:53:003
1407217622,76sleep30-21swapper/309:53:003
28413217316,60sleep30-21swapper/311:18:003
28413217316,60sleep30-21swapper/311:18:003
18316216815,130sleep30-21swapper/309:03:013
18316216815,130sleep30-21swapper/309:03:013
1667521660,10sleep10-21swapper/107:13:191
16262216621,123sleep30-21swapper/312:18:283
16262216621,123sleep30-21swapper/312:18:283
773121640,9sleep20-21swapper/211:53:062
10965216413,86sleep30-21swapper/312:03:143
8958216116,94sleep39022-21latency_hist08:33:013
8270215216,118sleep08345-21sendmail_mailtr11:53:300
2362121498,90sleep323657-21ntpq09:18:243
16090214215,21sleep00-21swapper/007:13:020
14529214134,40sleep00-21swapper/007:08:100
14529214134,40sleep00-21swapper/007:08:100
21370213926,46sleep30-21swapper/309:12:583
24585213730,90sleep30-21swapper/307:38:213
14420213114,101sleep314488-21awk08:48:273
14420213114,101sleep314488-21awk08:48:273
7283213018,34sleep21-21systemd11:52:592
427621300,13sleep04260-21munin-run08:17:590
3022212821,85sleep23179-21ls09:58:002
118721289,104sleep31151-21latency_hist08:08:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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