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2025-11-17 - 06:22

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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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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.
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 rack0slot8s.osadl.org (updated Mon Nov 17, 2025 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2759911030,93ptp4l0-21swapper/119:06:111
94980970,91rtkit-daemon0-21swapper/419:05:416
206052740,2sleep00-21swapper/019:05:140
2336426755,10sleep50-21swapper/519:08:337
2342426456,6sleep110-21swapper/1119:09:263
2017626452,10sleep70-21swapper/719:05:109
2317126352,9sleep100-21swapper/1019:05:482
2331126249,10sleep60-21swapper/619:07:468
16772600,0sleep20-21swapper/222:50:174
112022580,0sleep60-21swapper/600:25:208
253952570,0sleep70-21swapper/721:55:299
2376199273,8cyclictest0-21swapper/422:10:006
2376199212,15cyclictest0-21swapper/400:00:006
2376199212,14cyclictest0-21swapper/419:40:026
2376199202,14cyclictest0-21swapper/421:55:006
2378999190,1cyclictest0-21swapper/1020:05:272
275991170,1ptp4l21-21ksoftirqd/100:05:171
275991170,1ptp4l21-21ksoftirqd/100:05:161
275991170,0ptp4l0-21swapper/121:00:171
2378099173,8cyclictest0-21swapper/821:15:0110
2376699173,7cyclictest0-21swapper/521:10:007
2374399173,10cyclictest0-21swapper/121:55:011
2374399172,10cyclictest0-21swapper/123:55:001
2374399172,10cyclictest0-21swapper/123:55:001
2373699173,8cyclictest0-21swapper/022:50:010
280942160,0sleep100-21swapper/1022:00:192
275991160,1ptp4l21-21ksoftirqd/122:35:221
275991160,1ptp4l21-21ksoftirqd/119:25:161
275991160,0ptp4l0-21swapper/122:45:201
275991160,0ptp4l0-21swapper/122:02:201
275991160,0ptp4l0-21swapper/119:15:151
2379399162,9cyclictest0-21swapper/1122:00:003
2378499162,10cyclictest19403-21kworker/u24:100:10:0111
2378499162,10cyclictest19403-21kworker/u24:100:10:0011
2378099164,8cyclictest0-21swapper/820:30:0110
2378099163,7cyclictest0-21swapper/822:35:0110
2378099162,7cyclictest0-21swapper/800:40:0010
2377599162,7cyclictest0-21swapper/723:55:009
2377599162,7cyclictest0-21swapper/723:55:009
2375599164,7cyclictest0-21swapper/322:35:005
2375599163,8cyclictest0-21swapper/319:55:015
23743991613,2cyclictest32151-21/usr/sbin/munin21:25:151
2373699164,7cyclictest0-21swapper/019:20:000
2373699162,9cyclictest0-21swapper/020:55:000
2373699162,8cyclictest0-21swapper/020:20:250
191591160,0getstats0-21swapper/221:54:284
275991150,1ptp4l21-21ksoftirqd/121:15:241
275991150,0ptp4l0-21swapper/121:57:201
275991150,0ptp4l0-21swapper/121:50:011
275991150,0ptp4l0-21swapper/120:10:171
2379399153,7cyclictest0-21swapper/1122:55:263
2379399153,7cyclictest0-21swapper/1119:45:023
2378999150,3cyclictest0-21swapper/1023:40:182
2378999150,3cyclictest0-21swapper/1023:40:172
2378499153,7cyclictest0-21swapper/920:20:0011
2378499152,8cyclictest0-21swapper/922:50:0111
2378499152,8cyclictest0-21swapper/922:00:2711
2378499151,3cyclictest0-21swapper/923:20:1811
2377599152,8cyclictest0-21swapper/719:25:019
2375599153,7cyclictest0-21swapper/322:50:005
2375599153,7cyclictest0-21swapper/319:20:015
2375599153,7cyclictest0-21swapper/300:25:005
2375599152,8cyclictest0-21swapper/321:00:005
2375599152,8cyclictest0-21swapper/300:05:015
2375599152,8cyclictest0-21swapper/300:05:005
2375599152,7cyclictest0-21swapper/320:25:265
2374799152,9cyclictest0-21swapper/223:05:014
2374399154,6cyclictest0-21swapper/119:35:011
2374399152,8cyclictest0-21swapper/119:40:001
2373699153,8cyclictest0-21swapper/020:35:010
2373699153,8cyclictest0-21swapper/019:55:010
2373699153,7cyclictest0-21swapper/020:20:000
234082157,6sleep80-21swapper/819:09:1210
275991140,1ptp4l21-21ksoftirqd/119:40:271
275991140,0ptp4l0-21swapper/123:55:181
275991140,0ptp4l0-21swapper/120:27:021
275991140,0ptp4l0-21swapper/120:05:291
275991140,0ptp4l0-21swapper/100:32:151
2378099142,7cyclictest0-21swapper/822:20:0010
2378099142,6cyclictest0-21swapper/819:15:0010
2378099140,8cyclictest0-21swapper/800:20:0010
2377599144,6cyclictest0-21swapper/719:26:489
2376699142,7cyclictest0-21swapper/523:35:017
2376199142,7cyclictest0-21swapper/422:27:186
2375599143,6cyclictest0-21swapper/300:35:005
2374399143,7cyclictest0-21swapper/123:40:251
2374399143,7cyclictest0-21swapper/123:40:241
2374399142,8cyclictest0-21swapper/123:40:001
2374399142,7cyclictest0-21swapper/123:00:001
2373699142,8cyclictest0-21swapper/022:05:000
275991130,1ptp4l21-21ksoftirqd/122:53:301
275991130,1ptp4l21-21ksoftirqd/119:51:451
275991130,0ptp4l0-21swapper/123:08:081
2378999132,7cyclictest0-21swapper/1023:35:242
2378999132,6cyclictest0-21swapper/1021:35:292
2378999130,8cyclictest0-21swapper/1022:40:002
2378999130,2cyclictest0-21swapper/1019:25:162
2378499132,6cyclictest0-21swapper/919:15:2511
2378499131,8cyclictest0-21swapper/922:25:0011
2378499131,7cyclictest0-21swapper/919:30:0211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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