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2026-06-21 - 20:11

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 Fri Jun 19, 2026 12:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
230192833280,8220sleep122522-21apt-get07:02:291
261622573516,5703sleep225686-21kworker/2:108:52:372
1163828768,854sleep211611-21apt-get11:32:432
25700279725,737sleep325741-21unin-run08:52:183
6453250622,467sleep26476-21/usr/sbin/munin09:32:472
24887247219,436sleep224897-21/usr/sbin/munin12:12:362
18662234954,167sleep318664-21apt-get10:12:293
1110222917,273sleep3363-21snmpd08:06:023
7115228431,166sleep37157-21ntp_kernel_pll_11:17:423
2760122786,237sleep323758-21sshd12:21:453
9589227685,96sleep30-21swapper/311:27:193
2197227582,136sleep30-21swapper/307:37:393
11593226410,238sleep311611-21apt-get11:32:273
25546226130,151sleep325695-21grep12:12:493
11311224532,122sleep311509-21apt-key11:32:193
5250223337,149sleep35341-21fschecks_time11:12:373
5250223337,149sleep35341-21fschecks_time11:12:373
735422238,199sleep37503-21cut09:37:203
18326221814,190sleep118380-21sort11:52:321
3765221232,142sleep30-21swapper/311:07:363
23655221113,62sleep30-21swapper/308:42:493
18890220528,143sleep319018-21unixbench_multi08:27:553
20945220223,96sleep321092-21unixbench_multi10:17:503
4419219815,163sleep00-21swapper/009:27:280
23440219019,158sleep023486-21fschecks_count10:27:360
15101218910,93sleep315194-21latency_hist10:02:193
4270218621,152sleep24389-21sed11:07:472
24513218635,57sleep324536-21modprobe12:12:173
181321838,85sleep31854-21grep09:17:463
21910218130,111sleep321981-21cat08:37:483
27933217427,64sleep30-21swapper/312:22:303
21530216913,20sleep30-21swapper/312:02:363
6424216026,111sleep26432-21modprobe11:17:162
6424216026,111sleep26432-21modprobe11:17:162
25424216051,86sleep30-21swapper/307:07:513
23064215328,25sleep10-21swapper/110:27:171
13380215311,91sleep30-21swapper/308:12:373
3079221518,53sleep30-21swapper/312:32:193
17221214912,97sleep316626-21/usr/sbin/munin08:23:033
14461214859,50sleep314495-21munin-run11:42:173
1033214844,61sleep31053-21modprobe09:17:173
906121448,101sleep39176-21ls07:58:153
906121448,101sleep39176-21ls07:58:153
9853214040,80sleep324396-21cyclictest09:42:493
28780213832,90sleep328915-21timerwakeupswit07:17:483
30650213643,50sleep30-21swapper/309:07:283
4846213332,52sleep30-21swapper/307:47:203
4846213332,52sleep30-21swapper/307:47:203
15142213227,21sleep30-21swapper/308:17:413
14502213113,101sleep014583-21rm11:42:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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