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2025-12-10 - 11:43

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 Wed Dec 10, 2025 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
275991980,86ptp4l0-21swapper/119:05:191
3075826655,9sleep110-21swapper/1119:07:323
2996926653,10sleep50-21swapper/519:05:267
3089426453,9sleep00-21swapper/019:09:330
3087526351,10sleep70-21swapper/719:09:169
179362620,0sleep20-21swapper/221:35:264
3071226151,8sleep40-21swapper/419:06:496
3063526153,6sleep60-21swapper/619:05:508
3065226049,9sleep100-21swapper/1019:06:062
48512560,0sleep70-21swapper/700:10:009
48512560,0sleep70-21swapper/700:10:009
31135992016,3cyclictest0-21swapper/823:14:5610
275991190,1ptp4l21-21ksoftirqd/120:40:211
3110799183,9cyclictest0-21swapper/323:15:005
314972170,0sleep20-21swapper/221:15:004
3115099170,16cyclictest0-21swapper/1121:00:193
3112599172,8cyclictest0-21swapper/623:25:008
3110799173,9cyclictest0-21swapper/322:10:005
29652170,0sleep110-21swapper/1119:55:123
3115099161,10cyclictest0-21swapper/1120:10:003
3114199162,9cyclictest0-21swapper/923:25:0011
3114199162,8cyclictest0-21swapper/922:40:0011
3114199161,2cyclictest0-21swapper/922:00:1811
3113599164,7cyclictest0-21swapper/822:20:0010
3113599163,8cyclictest0-21swapper/821:00:0010
3113599162,8cyclictest0-21swapper/821:50:0010
3112599163,8cyclictest0-21swapper/622:55:008
3112599163,8cyclictest0-21swapper/620:50:008
3110199162,9cyclictest0-21swapper/200:30:004
275991160,0ptp4l0-21swapper/123:40:191
275991160,0ptp4l0-21swapper/122:55:161
3115099153,8cyclictest0-21swapper/1122:15:003
3114199153,7cyclictest0-21swapper/922:00:0011
3114199151,7cyclictest0-21swapper/921:35:0011
3113599152,8cyclictest0-21swapper/800:22:3310
3113599152,8cyclictest0-21swapper/800:00:0110
3112599153,8cyclictest19885-21kworker/u24:223:15:008
3112599153,8cyclictest0-21swapper/620:55:008
3112599151,8cyclictest0-21swapper/619:40:018
3111599150,10cyclictest6665-21cut20:40:186
3110799153,7cyclictest0-21swapper/322:25:005
3110799152,8cyclictest0-21swapper/321:05:005
3108799153,7cyclictest0-21swapper/021:55:260
3108799153,7cyclictest0-21swapper/020:00:010
3108799152,8cyclictest0-21swapper/019:40:010
306502157,6sleep80-21swapper/819:06:0410
275991150,1ptp4l9461-21grep20:45:141
275991150,1ptp4l21-21ksoftirqd/122:20:231
275991150,0ptp4l0-21swapper/120:15:281
275991150,0ptp4l0-21swapper/119:30:251
275991150,0ptp4l0-21swapper/119:20:251
162082150,0sleep20-21swapper/219:30:124
3115099141,7cyclictest0-21swapper/1123:40:003
3115099141,7cyclictest0-21swapper/1123:40:003
3114199143,7cyclictest0-21swapper/921:55:0011
3114199142,7cyclictest0-21swapper/923:05:2411
3114199142,7cyclictest0-21swapper/921:30:0011
3114199142,7cyclictest0-21swapper/900:30:0111
3114199142,7cyclictest0-21swapper/900:10:0111
3114199142,7cyclictest0-21swapper/900:10:0011
3113599142,7cyclictest0-21swapper/821:20:0010
3112599142,7cyclictest0-21swapper/621:30:008
3112599142,7cyclictest0-21swapper/621:10:278
3112599141,8cyclictest19885-21kworker/u24:219:25:018
3112199144,5cyclictest0-21swapper/522:05:007
3112199142,8cyclictest0-21swapper/520:05:017
3110799142,8cyclictest0-21swapper/323:40:015
3110799142,8cyclictest0-21swapper/323:40:005
3110799142,8cyclictest0-21swapper/321:25:005
275991140,1ptp4l21-21ksoftirqd/123:20:141
275991140,1ptp4l21-21ksoftirqd/122:25:261
275991140,0ptp4l0-21swapper/123:37:291
275991140,0ptp4l0-21swapper/123:37:291
275991140,0ptp4l0-21swapper/120:50:191
3114199133,6cyclictest0-21swapper/922:15:0011
3114199131,7cyclictest0-21swapper/922:35:0011
3113599131,11cyclictest0-21swapper/800:25:1910
3113599130,1cyclictest0-21swapper/823:20:2110
3112199132,7cyclictest0-21swapper/523:20:007
3111599130,10cyclictest0-21swapper/420:35:006
3110799132,7cyclictest0-21swapper/320:50:005
3110799132,7cyclictest0-21swapper/300:05:015
3110799132,7cyclictest0-21swapper/300:05:005
3110199132,7cyclictest0-21swapper/220:40:004
3108799132,7cyclictest0-21swapper/022:35:000
3108799132,7cyclictest0-21swapper/020:30:000
3108799132,7cyclictest0-21swapper/000:25:010
275991130,1ptp4l21-21ksoftirqd/122:54:401
275991130,1ptp4l21-21ksoftirqd/100:10:161
275991130,0ptp4l0-21swapper/120:55:211
275991130,0ptp4l0-21swapper/119:52:031
275991130,0ptp4l0-21swapper/100:35:141
3115099122,6cyclictest0-21swapper/1100:10:013
3115099122,6cyclictest0-21swapper/1100:10:003
3115099122,5cyclictest0-21swapper/1122:35:003
3114199122,6cyclictest0-21swapper/920:20:0011
3114199121,7cyclictest0-21swapper/920:00:0111
3114199120,4cyclictest13780-21kernelversion19:25:1811
3113599124,2cyclictest17627-21latency_hist20:15:0010
3113599123,3cyclictest25400-21perl21:05:1610
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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