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2026-08-30 - 19:32

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 Sun Aug 30, 2026 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
13449262915,598sleep313460-21ntpq10:34:183
483244751,176sleep1512-21idleruntime-cro11:38:521
23907238920,349sleep124053-21grep09:24:241
23907238920,349sleep124053-21grep09:24:241
248332329144,166sleep124871-21fschecks_count09:29:121
14209231913,291sleep214214-21ntpq12:19:182
14209231913,291sleep214214-21ntpq12:19:182
2877522659,199sleep128861-21cut07:59:131
14825224634,194sleep114869-21ntp_offset07:14:191
974219239,141sleep11026-21cut08:14:111
19785219117,155sleep119930-21unixbench_multi07:29:251
389421859,158sleep13910-21latency_hist11:48:531
248021830,61sleep02484-21latency_hist11:43:540
248021830,61sleep02484-21latency_hist11:43:540
21413218213,151sleep121487-21latency_hist09:18:551
2941721819,22sleep10-21swapper/109:43:541
5483218011,143sleep15627-21apt-config11:53:541
13843217921,56sleep313884-21fschecks_count12:19:103
13843217921,56sleep313884-21fschecks_count12:19:103
966221788,156sleep19800-21latency_hist10:23:551
966221788,156sleep19800-21latency_hist10:23:551
293421726,12sleep10-21swapper/108:19:191
6342217113,24sleep10-21swapper/108:29:251
2771521708,150sleep127840-21cat11:19:221
18186216813,137sleep118129-21latency_hist12:33:541
9634216624,118sleep10-21swapper/112:04:231
9634216624,118sleep10-21swapper/112:04:231
3187421627,137sleep131987-21timerwakeupswit09:49:231
101921609,59sleep10-21swapper/111:39:041
101921609,59sleep10-21swapper/111:39:041
4316215910,134sleep14434-21timerwakeupswit10:04:331
15196215517,119sleep10-21swapper/110:39:251
1600921547,131sleep10-21swapper/107:19:071
11422215310,19sleep10-21swapper/110:29:031
2659821527,17sleep10-21swapper/111:17:161
22450215011,13sleep00-21swapper/011:04:110
15056214910,40sleep115091-21latency_hist12:23:531
15056214910,40sleep115091-21latency_hist12:23:531
2343121477,12sleep10-21swapper/111:06:301
867121446,11sleep10-21swapper/112:02:341
1490821437,12sleep10-21swapper/108:56:381
10032214212,114sleep110175-21apt-config08:43:541
1859621416,11sleep10-21swapper/107:26:061
927021395,11sleep20-21swapper/210:19:282
927021395,11sleep20-21swapper/210:19:282
136421395,11sleep10-21swapper/109:56:211
29159213722,95sleep029234-21grep11:24:210
749021359,111sleep17535-21ntpq08:34:171
1922121357,28sleep10-21swapper/110:54:061
25270213411,109sleep225307-21idleruntime-cro07:48:522
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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