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2025-12-09 - 21:34

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #8

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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  Congatec
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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.
Unexpectedly long latencies may be caused by SMIs
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 100 highest latencies:
System rackeslot8s.osadl.org (updated Tue Dec 09, 2025 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18093359913860,1382cyclictest18307142sleep33
18093359913401,1334cyclictest22386342sleep33
197877521110,1sleep00-21swapper/00
180933599187,8cyclictest18812982sleep33
19247672173,1sleep30-21swapper/33
1809335991714,1cyclictest0-21swapper/33
1809335991714,1cyclictest0-21swapper/33
1809335991714,1cyclictest0-21swapper/33
1809335991714,1cyclictest0-21swapper/33
1809335991714,1cyclictest0-21swapper/33
1809335991613,1cyclictest0-21swapper/33
1809335991613,1cyclictest0-21swapper/33
180933599161,12cyclictest1919067-21taskset3
180933599161,11cyclictest2213907-21turbostat3
180933599161,11cyclictest2140292-21taskset3
180933599161,11cyclictest2123448-21taskset3
180933599160,12cyclictest2270998-21taskset3
180933599157,5cyclictest2303104-21turbostat3
1809335991513,1cyclictest0-21swapper/33
1809335991512,1cyclictest0-21swapper/33
1809335991512,1cyclictest0-21swapper/33
180933599151,11cyclictest2238124-21turbostat3
180933599151,11cyclictest2095263-21taskset3
180933599151,11cyclictest2095263-21taskset3
180933599147,4cyclictest1815417-21taskset3
180933599145,6cyclictest2251994-21taskset3
180933599145,6cyclictest21749422sleep33
180933599144,7cyclictest1943045-21taskset3
180933599144,7cyclictest1829942-21taskset3
1809335991413,0cyclictest0-21swapper/33
1809335991413,0cyclictest0-21swapper/33
1809335991412,1cyclictest0-21swapper/33
1809335991412,1cyclictest0-21swapper/33
1809335991412,1cyclictest0-21swapper/33
1809335991412,0cyclictest0-21swapper/33
1809335991411,1cyclictest0-21swapper/33
1809335991411,1cyclictest0-21swapper/33
1809335991411,1cyclictest0-21swapper/33
180933599141,10cyclictest2188572-21taskset3
180933599141,10cyclictest2081742-21taskset3
180933599141,10cyclictest2074613-21taskset3
180933599141,10cyclictest2060630-21taskset3
180933599141,10cyclictest2023718-21taskset3
180933599141,10cyclictest1963807-21taskset3
180933599141,10cyclictest1931583-21taskset3
180933599140,11cyclictest2133384-21turbostat3
22628132131,3sleep22262852-21apt-get2
20522892130,5sleep12052294-21sh1
19934622132,8sleep01993601-21/usr/sbin/munin0
180933599134,7cyclictest2278866-21taskset3
180933599134,7cyclictest2157766-21taskset3
180933599133,7cyclictest2155665-21taskset3
180933599132,8cyclictest2256535-21chrt3
180933599131,9cyclictest2228616-21chrt3
180933599131,9cyclictest1946388-21taskset3
1809335991311,1cyclictest0-21swapper/33
1809335991311,1cyclictest0-21swapper/33
1809335991311,1cyclictest0-21swapper/33
1809335991311,1cyclictest0-21swapper/33
180933599131,10cyclictest2147960-21taskset3
1809335991310,1cyclictest0-21swapper/33
1809335991310,1cyclictest0-21swapper/33
1809335991310,1cyclictest0-21swapper/33
180933599130,10cyclictest2044597-21taskset3
19386512120,4sleep11938199-21apt-get1
19195172121,7sleep11919550-21apt-get1
190898120,8rtkit-daemon2236146-21ssh0
190898120,4rtkit-daemon1815676-21munin-node0
180933599129,1cyclictest0-21swapper/33
180933599123,7cyclictest2198228-21taskset3
180933599121,9cyclictest1963410-21taskset3
180933599121,8cyclictest2214693-21taskset3
180933599121,8cyclictest2057766-21taskset3
180933599121,8cyclictest1980034-21taskset3
180933599120,9cyclictest2189940-21taskset3
180933599120,10cyclictest2279207-21taskset3
22548802110,1sleep12254919-21apt-get1
22296022111,7sleep02229610-21ssh0
22138852111,7sleep02214099-21cat0
19778092110,4sleep10-21swapper/11
19627242110,8sleep21962828-21awk2
190898110,3rtkit-daemon667-21snmpd1
190898110,2rtkit-daemon0-21swapper/11
21819712102,4sleep22181993-21apt-get2
21716442100,7sleep02171650-21ssh0
21011962101,5sleep22101233-21apt-get2
20767972102,4sleep02076830-21apt-get0
19451192100,1sleep01945212-21/usr/sbin/munin0
190898100,6rtkit-daemon2136471-21grep0
190898100,6rtkit-daemon2092238-21chrt0
190898100,5rtkit-daemon667-21snmpd0
190898100,5rtkit-daemon2133408-21ssh0
190898100,5rtkit-daemon2118575-21irqrtprio1
190898100,4rtkit-daemon2058613-21ssh0
190898100,3rtkit-daemon2155786-21ssh2
190898100,3rtkit-daemon2068361-21ssh0
18876012101,5sleep01887756-21diskstats0
18876012101,5sleep01887756-21diskstats0
18099422100,7sleep01810846-21sed0
2298095292,4sleep02300241-21grep0
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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