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2025-12-07 - 01:29

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, 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 rackcslot8s.osadl.org (updated Sat Dec 06, 2025 12:46:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28902930,0sleep30-21swapper/310:15:003
114091620,30ptp4l0-21swapper/107:05:011
114091620,2ptp4l0-21swapper/507:05:105
2633926038,7sleep20-21swapper/207:09:012
2120915948,6phc2sys0-21swapper/607:09:066
114091590,28ptp4l0-21swapper/007:05:290
2450525140,7sleep70-21swapper/707:05:057
2617524938,7sleep30-21swapper/307:06:543
2640924836,7sleep40-21swapper/407:09:514
114091330,0ptp4l0-21swapper/512:10:175
114091320,0ptp4l0-21swapper/610:29:256
114091320,0ptp4l0-21swapper/609:15:206
114091320,0ptp4l0-21swapper/011:50:130
114091310,0ptp4l0-21swapper/612:25:526
114091310,0ptp4l0-21swapper/612:05:146
114091310,0ptp4l0-21swapper/610:48:066
114091310,0ptp4l0-21swapper/510:20:535
114091310,0ptp4l0-21swapper/510:15:435
114091310,0ptp4l0-21swapper/109:00:251
114091310,0ptp4l0-21swapper/010:38:290
114091300,0ptp4l0-21swapper/611:18:586
114091300,0ptp4l0-21swapper/611:14:186
114091300,0ptp4l0-21swapper/111:00:201
114091300,0ptp4l0-21swapper/012:10:190
114091290,0ptp4l0-21swapper/611:54:366
114091290,0ptp4l0-21swapper/610:19:086
114091290,0ptp4l0-21swapper/609:50:206
114091290,0ptp4l0-21swapper/511:27:075
114091290,0ptp4l0-21swapper/011:31:040
114091290,0ptp4l0-21swapper/009:13:320
114091280,0ptp4l0-21swapper/611:22:056
114091280,0ptp4l0-21swapper/610:07:116
114091280,0ptp4l0-21swapper/609:24:386
114091280,0ptp4l0-21swapper/608:05:126
114091280,0ptp4l0-21swapper/210:36:502
114091280,0ptp4l0-21swapper/210:05:122
114091280,0ptp4l0-21swapper/209:54:352
114091280,0ptp4l0-21swapper/010:33:160
114091280,0ptp4l0-21swapper/010:20:130
114091280,0ptp4l0-21swapper/008:10:180
114091270,2ptp4l0-21swapper/110:32:371
114091270,0ptp4l0-21swapper/612:35:356
114091270,0ptp4l0-21swapper/612:04:266
114091270,0ptp4l0-21swapper/610:24:226
114091270,0ptp4l0-21swapper/609:12:396
114091270,0ptp4l0-21swapper/211:23:092
114091270,0ptp4l0-21swapper/210:33:032
114091270,0ptp4l0-21swapper/110:59:081
114091270,0ptp4l0-21swapper/110:59:081
114091260,0ptp4l0-21swapper/611:31:276
114091260,0ptp4l0-21swapper/611:06:026
114091260,0ptp4l0-21swapper/610:54:516
114091260,0ptp4l0-21swapper/610:43:576
114091260,0ptp4l0-21swapper/511:52:265
114091260,0ptp4l0-21swapper/511:17:535
114091260,0ptp4l0-21swapper/412:23:094
114091260,0ptp4l0-21swapper/410:00:034
114091260,0ptp4l0-21swapper/212:26:362
114091260,0ptp4l0-21swapper/212:17:372
114091260,0ptp4l0-21swapper/210:57:042
114091260,0ptp4l0-21swapper/210:57:032
114091260,0ptp4l0-21swapper/112:03:351
114091260,0ptp4l0-21swapper/009:30:070
114091250,4ptp4l26532-21sh10:03:241
114091250,2ptp4l0-21swapper/009:20:060
114091250,1ptp4l32308-21cpuspeed_turbos07:20:122
114091250,0ptp4l0-21swapper/611:26:116
114091250,0ptp4l0-21swapper/609:28:416
114091250,0ptp4l0-21swapper/211:54:592
114091250,0ptp4l0-21swapper/210:25:212
114091250,0ptp4l0-21swapper/207:15:002
114091250,0ptp4l0-21swapper/111:38:241
114091250,0ptp4l0-21swapper/110:11:241
114091250,0ptp4l0-21swapper/108:10:001
114091250,0ptp4l0-21swapper/012:08:260
114091250,0ptp4l0-21swapper/010:15:190
26709992420,3cyclictest2513-21kworker/4:010:20:444
26709992416,0cyclictest49-21ksoftirqd/408:54:154
114091240,1ptp4l811-21NetworkManager08:31:091
114091240,1ptp4l30944-21fw_forwarded_lo11:35:142
114091240,1ptp4l29888-21/usr/sbin/munin09:25:142
114091240,1ptp4l28347-21latency10:05:170
114091240,1ptp4l26928-21munin-run08:20:002
114091240,1ptp4l26928-21munin-run08:20:002
114091240,1ptp4l20129-21cpu09:55:116
114091240,1ptp4l1038-21ssh10:55:186
114091240,1ptp4l1038-21ssh10:55:176
114091240,0ptp4l0-21swapper/612:30:366
114091240,0ptp4l0-21swapper/609:45:446
114091240,0ptp4l0-21swapper/609:30:496
114091240,0ptp4l0-21swapper/608:55:146
114091240,0ptp4l0-21swapper/608:00:176
114091240,0ptp4l0-21swapper/607:40:116
114091240,0ptp4l0-21swapper/607:35:136
114091240,0ptp4l0-21swapper/607:20:006
114091240,0ptp4l0-21swapper/509:35:185
114091240,0ptp4l0-21swapper/410:10:174
114091240,0ptp4l0-21swapper/212:30:202
114091240,0ptp4l0-21swapper/212:11:582
114091240,0ptp4l0-21swapper/211:27:182
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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