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2025-12-13 - 23:31

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
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 50 highest latencies:
System rackeslot8s.osadl.org (updated Sat Dec 13, 2025 12:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27201179910820,1078cyclictest30190722sleep311:00:013
2720117993930,390cyclictest2954421-21turbostat10:14:553
290836521940,2sleep20-21swapper/209:30:222
2720117992017,1cyclictest0-21swapper/307:35:003
2720117991916,1cyclictest0-21swapper/308:40:013
2720117991916,1cyclictest0-21swapper/307:20:003
272011799191,14cyclictest3012463-21taskset10:55:013
272011799186,9cyclictest3063978-21turbostat11:35:013
272011799176,7cyclictest2915453-21turbostat09:39:593
272011799171,12cyclictest3044507-21turbostat11:20:003
272011799171,12cyclictest2883662-21taskset09:15:123
2720117991614,1cyclictest0-21swapper/309:55:003
272011799161,11cyclictest3096328-21sleep12:00:003
272011799161,11cyclictest2720319-21taskset07:10:083
30697222150,5sleep03069794-21ntp_states11:35:210
28568822150,4sleep12857006-21cat08:50:231
272011799158,4cyclictest2812762-21turbostat08:20:003
2720117991513,1cyclictest0-21swapper/311:14:383
2720117991513,1cyclictest0-21swapper/308:08:013
2720117991513,0cyclictest0-21swapper/309:24:053
2720117991512,1cyclictest0-21swapper/311:40:223
2720117991512,1cyclictest0-21swapper/309:09:213
2720117991512,1cyclictest0-21swapper/307:50:193
272011799151,11cyclictest3109348-21chrt12:10:013
272011799151,11cyclictest3018051-21taskset10:55:213
272011799151,11cyclictest2980062-21turbostat10:30:003
272011799151,11cyclictest2825899-21taskset08:30:133
272011799151,10cyclictest2954418-21turbostat10:10:003
272011799151,10cyclictest2935213-21taskset09:55:153
31341712140,5sleep03134228-21ntp_states12:25:210
272011799144,8cyclictest2857386-21taskset08:51:403
272011799144,7cyclictest28056562sleep308:10:233
272011799141,8cyclictest28387152sleep308:40:153
2720117991413,0cyclictest0-21swapper/307:43:033
2720117991412,1cyclictest0-21swapper/310:20:323
2720117991412,1cyclictest0-21swapper/308:25:043
2720117991412,0cyclictest0-21swapper/311:26:063
2720117991411,1cyclictest0-21swapper/310:41:283
2720117991411,1cyclictest0-21swapper/310:38:213
2720117991411,1cyclictest0-21swapper/307:36:513
272011799141,10cyclictest3147900-21turbostat12:40:003
272011799141,10cyclictest3108203-21taskset12:05:203
272011799141,10cyclictest3050347-21taskset11:20:213
272011799141,10cyclictest3025461-21taskset11:05:023
272011799141,10cyclictest2946914-21taskset10:00:283
272011799141,10cyclictest2908693-21taskset09:31:073
272011799141,10cyclictest2787089-21turbostat08:00:003
272011799140,11cyclictest3128044-21chrt12:20:303
31304032130,9sleep13132370-21tr12:25:181
29740952131,8sleep22974210-21cut10:25:162
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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