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2026-05-19 - 03:40

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 Tue May 19, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
247112603813,6013sleep210951-21kworker/2:100:15:022
139592596413,5939sleep132173-21kworker/1:223:41:461
27622342114,3394sleep216621-21kworker/2:223:06:022
27622342114,3394sleep216621-21kworker/2:223:06:022
2138524847,409sleep321424-21ntpq20:39:353
31972244217,409sleep331987-21awk22:54:443
31972244217,409sleep331987-21awk22:54:443
307722770,63sleep324529-21cyclictest21:24:323
30102236138,26sleep31-21systemd23:09:103
30102236138,26sleep31-21systemd23:09:103
4568223068,81sleep34360-21/usr/sbin/munin21:29:293
28040221732,150sleep328054-21wc19:19:123
29767221418,142sleep329914-21unixbench_singl21:04:423
28191221295,21sleep30-21swapper/322:44:513
17716221095,19sleep30-21swapper/320:29:133
17895220313,177sleep317946-21cpuspeed20:29:253
12540220341,106sleep30-21swapper/323:38:453
18782218923,121sleep318848-21fschecks_time22:15:283
18782218923,121sleep318848-21fschecks_time22:15:283
12123218813,74sleep312133-21acpi21:54:203
12123218813,74sleep312133-21acpi21:54:203
2196218217,141sleep02286-21grep19:39:320
1315921829,157sleep013209-21sed23:39:310
178121788,99sleep31825-21awk19:39:103
6845217251,92sleep30-21swapper/323:19:323
19526217256,102sleep319540-21grep20:34:303
19526217256,102sleep319540-21grep20:34:303
15013217148,102sleep30-21swapper/323:44:433
24834216942,21sleep30-21swapper/322:34:223
5552216712,140sleep05561-21ntpq23:14:440
17199216452,92sleep30-21swapper/322:09:343
799216346,101sleep3882-21cat22:59:413
799216346,101sleep3882-21cat22:59:413
31234216213,103sleep331386-21latency_hist19:29:133
3396216119,34sleep30-21swapper/323:09:303
10697216019,27sleep310786-21fschecks_time21:49:283
12121215711,130sleep212129-21ntpq20:09:382
9271214317,26sleep30-21swapper/321:44:353
14994214050,78sleep315033-21modprobe22:04:093
27981213910,49sleep30-21swapper/321:00:303
17599213714,24sleep30-21swapper/323:54:243
30676213135,81sleep30-21swapper/321:09:273
6612213020,86sleep36756-21unixbench_multi21:34:423
22222213072,22sleep322268-21cpu00:09:263
22222213072,22sleep322268-21cpu00:09:263
6301212912,102sleep06332-21nfs_client21:34:350
402212917,39sleep30-21swapper/321:14:443
26026212820,93sleep026027-21sshd22:38:020
15743212862,25sleep315777-21ps22:04:383
20767212618,86sleep020858-21cut00:04:300
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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