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2026-05-18 - 02:24

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 May 17, 2026 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25651247049,4679sleep314125-21kworker/u8:309:29:343
170162260012,2572sleep026633-1kworker/0:0H10:44:330
13315212189,1192sleep026633-1kworker/0:0H12:14:340
133212112612,1101sleep130628-1kworker/1:1H12:14:391
1188029997,958sleep311916-21ntpq12:09:403
1188029997,958sleep311916-21ntpq12:09:403
938827807,736sleep39425-21ntpq10:19:413
875276820,729sleep1969-21/usr/sbin/munin11:34:371
4249270910,685sleep026633-1kworker/0:0H10:04:270
1477425047,484sleep314810-21ntpq08:54:413
1035524865,468sleep310391-21ntpq12:04:393
10113246512,439sleep310153-21grep08:39:393
20734242622,336sleep331841-1kworker/3:2H09:14:353
844024098,281sleep38504-21wc08:34:383
28245232031,269sleep128264-21fschecks_count07:54:341
28245232031,269sleep128264-21fschecks_count07:54:341
7061231411,288sleep07090-21apt-config10:14:000
20870230019,228sleep30-21swapper/312:39:163
19220229744,214sleep319300-21fschecks_time09:09:353
20893229013,258sleep021037-21cat12:39:170
1235722577,239sleep312404-21cat10:29:383
1235722577,239sleep312404-21cat10:29:383
5039224245,152sleep35128-21latency_hist11:49:173
16736223953,166sleep316753-21modprobe07:19:153
22028222659,59sleep30-21swapper/307:34:373
19314221916,187sleep019321-21/usr/sbin/munin07:24:530
12932220927,168sleep313019-21fschecks_time08:49:363
30421220728,111sleep313298-21cyclictest09:44:363
13599220719,170sleep113616-21uniq07:09:361
13599220719,170sleep113616-21uniq07:09:361
2100122048,92sleep321123-21cat07:29:453
1138422019,174sleep311461-21fschecks_time08:44:353
24408218910,60sleep30-21swapper/309:24:453
232892188130,18sleep322982-21apt-get11:04:193
29947218419,120sleep329957-21modprobe09:44:153
14858217730,126sleep314795-21latency_hist07:14:183
14858217730,126sleep314795-21latency_hist07:14:183
7599217657,57sleep30-21swapper/310:14:363
3218221769,124sleep312492-21ntpd09:49:403
1266217233,14sleep30-21swapper/309:54:413
4988217115,85sleep15009-21awk11:49:151
2651221699,147sleep0363-21snmpd11:14:010
3236621656,32sleep30-21swapper/311:29:513
19497216215,127sleep019534-21ntp_kernel_pll_09:09:400
12391216226,117sleep212451-21processes07:04:452
2663216137,61sleep30-21swapper/311:39:443
5912215456,60sleep36039-21cat11:49:453
8173215064,19sleep30-21swapper/311:59:183
6181214614,51sleep26227-21/usr/sbin/munin10:09:422
13256214653,29sleep30-21swapper/307:09:183
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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