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2026-06-12 - 17:17

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 Fri Jun 12, 2026 12:46:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
111391630,5ptp4l0-21swapper/407:08:124
1881916050,6phc2sys0-21swapper/707:09:217
111391600,29ptp4l0-21swapper/007:07:100
1922825747,6sleep20-21swapper/207:07:472
12062570,0sleep60-21swapper/611:09:006
102112570,0sleep20-21swapper/211:20:172
111391550,5ptp4l0-21swapper/107:06:271
1939024837,7sleep50-21swapper/507:09:505
1749624836,7sleep60-21swapper/607:05:096
1906524635,7sleep30-21swapper/307:05:383
111391340,1ptp4l31003-21irqstats10:20:151
111391340,0ptp4l0-21swapper/012:05:160
111391320,1ptp4l9386-21/usr/sbin/munin10:35:150
111391320,0ptp4l0-21swapper/507:45:135
111391310,0ptp4l0-21swapper/510:08:295
111391310,0ptp4l0-21swapper/109:24:511
111391310,0ptp4l0-21swapper/009:38:210
111391310,0ptp4l0-21swapper/007:45:170
111391300,0ptp4l0-21swapper/111:41:211
111391300,0ptp4l0-21swapper/012:29:140
111391300,0ptp4l0-21swapper/011:46:360
111391300,0ptp4l0-21swapper/010:40:370
111391300,0ptp4l0-21swapper/010:40:360
111391300,0ptp4l0-21swapper/010:18:250
111391300,0ptp4l0-21swapper/010:04:390
111391300,0ptp4l0-21swapper/009:10:350
111391290,0ptp4l0-21swapper/511:45:195
111391290,0ptp4l0-21swapper/411:58:414
111391290,0ptp4l0-21swapper/311:59:003
111391290,0ptp4l0-21swapper/112:18:481
111391290,0ptp4l0-21swapper/110:07:581
111391280,0ptp4l0-21swapper/409:43:444
111391280,0ptp4l0-21swapper/012:17:270
111391280,0ptp4l0-21swapper/010:59:190
111391280,0ptp4l0-21swapper/008:00:120
111391270,1ptp4l0-21swapper/109:05:191
111391270,0ptp4l0-21swapper/711:59:047
111391270,0ptp4l0-21swapper/709:50:497
111391270,0ptp4l0-21swapper/511:35:145
111391270,0ptp4l0-21swapper/412:04:544
111391270,0ptp4l0-21swapper/411:53:354
111391270,0ptp4l0-21swapper/410:42:504
111391270,0ptp4l0-21swapper/410:42:494
111391270,0ptp4l0-21swapper/409:34:564
111391270,0ptp4l0-21swapper/409:19:034
111391270,0ptp4l0-21swapper/109:16:151
111391270,0ptp4l0-21swapper/012:00:290
111391270,0ptp4l0-21swapper/011:54:010
111391270,0ptp4l0-21swapper/011:31:510
111391270,0ptp4l0-21swapper/011:26:380
111391270,0ptp4l0-21swapper/011:11:120
111391270,0ptp4l0-21swapper/010:32:520
19691992620,3cyclictest481ktimersoftd/407:25:594
111391260,0ptp4l0-21swapper/610:46:576
111391260,0ptp4l0-21swapper/510:32:165
111391260,0ptp4l0-21swapper/510:29:485
111391260,0ptp4l0-21swapper/412:25:324
111391260,0ptp4l0-21swapper/412:08:374
111391260,0ptp4l0-21swapper/410:11:584
111391260,0ptp4l0-21swapper/112:11:451
111391260,0ptp4l0-21swapper/111:24:321
111391260,0ptp4l0-21swapper/110:30:071
111391260,0ptp4l0-21swapper/110:19:501
111391260,0ptp4l0-21swapper/108:35:161
111391260,0ptp4l0-21swapper/011:55:140
111391260,0ptp4l0-21swapper/011:09:450
111391260,0ptp4l0-21swapper/011:03:340
111391260,0ptp4l0-21swapper/009:18:290
111391250,0ptp4l0-21swapper/512:30:005
111391250,0ptp4l0-21swapper/510:39:175
111391250,0ptp4l0-21swapper/509:20:205
111391250,0ptp4l0-21swapper/412:38:054
111391250,0ptp4l0-21swapper/411:29:554
111391250,0ptp4l0-21swapper/409:46:544
111391250,0ptp4l0-21swapper/409:27:294
111391250,0ptp4l0-21swapper/409:22:364
111391250,0ptp4l0-21swapper/111:27:591
111391250,0ptp4l0-21swapper/110:29:401
111391250,0ptp4l0-21swapper/012:22:300
111391250,0ptp4l0-21swapper/012:10:300
111391250,0ptp4l0-21swapper/010:50:420
111391250,0ptp4l0-21swapper/008:05:140
111391250,0ptp4l0-21swapper/008:05:130
111391250,0ptp4l0-21swapper/007:15:000
111391240,1ptp4l26654-21missed_timers09:30:170
111391240,1ptp4l20254-21strings10:05:164
111391240,1ptp4l2008-21/usr/sbin/munin10:25:137
111391240,1ptp4l1517-21latency_hist07:40:010
111391240,0ptp4l0-21swapper/711:29:207
111391240,0ptp4l0-21swapper/708:50:137
111391240,0ptp4l0-21swapper/512:11:305
111391240,0ptp4l0-21swapper/512:06:095
111391240,0ptp4l0-21swapper/509:45:135
111391240,0ptp4l0-21swapper/509:16:135
111391240,0ptp4l0-21swapper/507:26:435
111391240,0ptp4l0-21swapper/412:15:164
111391240,0ptp4l0-21swapper/411:05:034
111391240,0ptp4l0-21swapper/410:36:264
111391240,0ptp4l0-21swapper/410:22:044
111391240,0ptp4l0-21swapper/410:15:164
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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