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2026-08-21 - 09:48

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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.

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 rack4slot1s.osadl.org (updated Fri Aug 21, 2026 00:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
840921010,2chrt0-21swapper/023:29:150
279912710,6chrt27996-21unixbench_multi22:54:170
279912710,6chrt27996-21unixbench_multi22:54:170
69452680,3chrt0-21swapper/020:34:080
59452620,2chrt0-21swapper/323:24:073
187502570,2sleep018751-21fschecks_count19:39:040
187502570,2sleep018751-21fschecks_count19:39:040
176762560,3chrt0-21swapper/322:29:083
9752995448,4cyclictest20648-21/usr/sbin/munin00:04:080
9752995348,3cyclictest0-21swapper/000:03:590
9752995348,3cyclictest0-21swapper/000:03:590
9752995348,3cyclictest0-21swapper/000:03:590
6382530,3chrt0-21swapper/000:34:190
236652450,4chrt0-21swapper/021:19:060
236652450,4chrt0-21swapper/021:19:060
236652450,4chrt0-21swapper/021:19:060
114362450,2chrt0-21swapper/022:11:320
114362450,2chrt0-21swapper/022:11:320
9759994322,5cyclictest17101-21gltestperf19:34:071
9759994236,4cyclictest0-21swapper/100:04:171
9752994135,4cyclictest9732-21cyclictest00:24:200
9752994135,4cyclictest9732-21cyclictest00:24:200
174072380,2sleep017551-21missed_timers23:54:120
9759993730,5cyclictest17411-21kernelversion23:54:111
9759993726,8cyclictest3046-21latency_hist00:43:581
9759993726,8cyclictest3046-21latency_hist00:43:581
18762370,2sleep00-21swapper/020:19:120
18762370,2sleep00-21swapper/020:19:120
262052360,2sleep20-21swapper/221:24:102
12732350,2sleep30-21swapper/323:09:203
9752993425,7cyclictest545-21in:imuxsock22:48:540
9752993425,7cyclictest545-21in:imuxsock22:48:540
266732340,1sleep026743-21tail19:59:110
266732340,1sleep026743-21tail19:59:110
976699331,25cyclictest20529-21taskset00:03:582
976699331,25cyclictest20529-21taskset00:03:582
976699331,25cyclictest20529-21taskset00:03:582
9759993323,7cyclictest29349-21needreboot22:59:111
9759993323,7cyclictest29349-21needreboot22:59:111
9759993228,3cyclictest27555-21ntp_offset22:54:131
9759993228,3cyclictest27555-21ntp_offset22:54:131
976799311,20cyclictest20548-21chrt00:03:593
976799311,20cyclictest20548-21chrt00:03:593
976799311,20cyclictest20548-21chrt00:03:593
976799311,10cyclictest16271-21taskset23:49:203
976799311,10cyclictest16271-21taskset23:49:203
9752993124,5cyclictest545-21in:imuxsock22:04:380
9752993124,5cyclictest545-21in:imuxsock22:04:380
9752993123,6cyclictest4322-21sshd20:24:370
9752993123,6cyclictest4322-21sshd20:24:370
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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