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2026-09-03 - 01:21

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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 rack0slot4s.osadl.org (updated Thu Sep 03, 2026 00:46:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
39415102364325,13sleep110-21swapper/1119:09:583
39412082364344,13sleep20-21swapper/219:06:028
39380162362345,11sleep140-21swapper/1419:05:116
39414492361340,14sleep150-21swapper/1519:09:127
39412862361322,13sleep30-21swapper/319:07:089
39414032356317,13sleep120-21swapper/1219:08:384
39413542354333,14sleep80-21swapper/819:08:0114
39411822352333,12sleep00-21swapper/019:05:450
39414612351331,13sleep90-21swapper/919:09:2215
39412492351331,13sleep70-21swapper/719:06:4013
39413072350315,28sleep50-21swapper/519:07:2711
39412272350330,13sleep40-21swapper/419:06:2110
39412962349328,14sleep130-21swapper/1319:07:195
39412892345324,14sleep60-21swapper/619:07:1212
39412332344325,13sleep100-21swapper/1019:06:262
39413032342320,14sleep10-21swapper/119:07:221
3941992997876,1cyclictest4170308-21kworker/u32:0+events_unbound23:25:1612
3941992997876,1cyclictest4170308-21kworker/u32:0+events_unbound23:25:1612
3942004996259,2cyclictest78020-21kworker/u32:1+flush-259:000:20:182
3942013996058,2cyclictest4038668-21kworker/u32:0+events_unbound21:47:595
3941969995553,2cyclictest4021857-21kworker/u32:3+events_unbound21:17:160
3941992995352,0cyclictest0-21swapper/623:40:1112
3942013995049,1cyclictest4067203-21kworker/u32:4+events_unbound22:11:005
3941969994845,2cyclictest4170308-21kworker/u32:0+events_unbound23:50:520
3942013994644,2cyclictest4123815-21kworker/u32:2+events_unbound22:28:575
3941983994545,0cyclictest0-21swapper/319:55:129
3941983994542,2cyclictest4005277-21kworker/u32:0+events_unbound20:23:309
3941983994542,2cyclictest4005277-21kworker/u32:0+events_unbound20:23:309
3941992994442,1cyclictest8575-21kworker/u32:3+events_unbound23:35:3012
3942013994341,2cyclictest4139345-21kworker/u32:1+events_unbound23:02:135
3941989994037,2cyclictest4067203-21kworker/u32:4+flush-259:022:10:2211
3942008993836,2cyclictest3967749-21kworker/u32:1+flush-259:021:15:213
3941999993837,1cyclictest92408-21kworker/u32:2+events_unbound00:31:4914
3941969993836,2cyclictest0-21swapper/000:35:140
3942013993736,1cyclictest4170308-21kworker/u32:0+flush-259:000:04:175
3942008993635,1cyclictest4170308-21kworker/u32:0+flush-259:023:41:163
3941981993634,2cyclictest92408-21kworker/u32:2+events_unbound00:34:238
3942020993533,1cyclictest4170308-21kworker/u32:0+events_unbound22:57:067
3941969993533,1cyclictest20402-21kworker/u32:1+events_unbound23:45:120
3941969993532,2cyclictest0-21swapper/019:10:110
3942011993433,1cyclictest4123815-21kworker/u32:2+flush-259:022:28:184
3942011993432,2cyclictest92408-21kworker/u32:2+events_unbound00:36:554
3941983993433,1cyclictest4139345-21kworker/u32:1+events_unbound23:04:479
3941976993432,1cyclictest3984264-21kworker/u32:0+events_unbound19:57:541
3942020993333,0cyclictest0-21swapper/1519:55:137
394201899339,11cyclictest0-21swapper/1420:05:496
3942013993329,3cyclictest0-21swapper/1319:15:125
3942008993325,7cyclictest51881-21ethtool23:45:143
3941969993333,0cyclictest0-21swapper/023:37:020
3941969993333,0cyclictest0-21swapper/022:57:590
3941969993333,0cyclictest0-21swapper/000:06:070
3941969993332,0cyclictest0-21swapper/021:25:180
3941969993331,1cyclictest4066667-21kworker/u32:1+events_unbound21:30:140
3941969993330,2cyclictest4170308-21kworker/u32:0+events_unbound23:20:080
3941969993330,2cyclictest4170308-21kworker/u32:0+events_unbound23:20:080
3942020993230,2cyclictest3902878-21kworker/u32:3+events_unbound19:39:597
394201899328,11cyclictest0-21swapper/1400:18:266
394201899327,14cyclictest0-21swapper/1419:54:496
394201899320,29cyclictest0-21swapper/1421:30:146
3942013993232,0cyclictest0-21swapper/1319:10:115
3942013993229,3cyclictest3967749-21kworker/u32:1+events_unbound20:54:135
3942011993231,1cyclictest4123815-21kworker/u32:2+flush-259:022:50:044
3942011993230,2cyclictest4021857-21kworker/u32:3+flush-259:020:42:044
3942004993231,1cyclictest4066667-21kworker/u32:1+events_unbound21:27:302
3942002993214,15cyclictest0-21swapper/919:55:1315
3941989993231,1cyclictest3967749-21kworker/u32:1+flush-259:020:45:1511
3941969993232,0cyclictest0-21swapper/022:03:410
394201899317,13cyclictest0-21swapper/1423:56:286
394201899317,13cyclictest0-21swapper/1423:01:326
394201899310,30cyclictest0-21swapper/1419:55:346
3942013993131,0cyclictest0-21swapper/1322:46:265
3942013993130,1cyclictest0-21swapper/1300:35:145
394201399310,30cyclictest0-21swapper/1322:35:085
3942011993130,1cyclictest4058453-21ethtool21:20:174
394200899310,1cyclictest0-21swapper/1121:45:153
3942002993111,18cyclictest0-21swapper/920:50:1115
394200299310,30cyclictest0-21swapper/922:00:1515
394200299310,30cyclictest0-21swapper/900:37:3315
3941992993129,2cyclictest4139345-21kworker/u32:1+events_unbound22:31:2912
394199299310,30cyclictest0-21swapper/620:16:4612
394198999310,30cyclictest0-21swapper/521:55:1611
3941987993130,1cyclictest1774-21snmpd20:02:0110
394198799310,28cyclictest0-21swapper/421:35:1610
3941983993130,1cyclictest1774-21snmpd20:06:139
3941976993130,1cyclictest1774-21snmpd21:20:321
394197699310,1cyclictest0-21swapper/119:15:551
3941969993130,1cyclictest3970448-21kworker/0:0+events19:51:420
3941969993129,2cyclictest3996744-21kworker/u32:2+events_unbound20:28:370
3941969993129,2cyclictest3996744-21kworker/u32:2+events_unbound20:28:370
3941969993124,3cyclictest0-21swapper/023:56:410
394202099300,30cyclictest0-21swapper/1522:35:327
394202099300,30cyclictest0-21swapper/1521:42:527
394202099300,29cyclictest0-21swapper/1523:15:127
394202099300,1cyclictest0-21swapper/1521:30:147
394201899307,12cyclictest0-21swapper/1423:12:326
394201899306,13cyclictest0-21swapper/1423:45:296
394201899306,13cyclictest0-21swapper/1421:00:436
3942018993029,1cyclictest1774-21snmpd21:07:126
3942018993029,1cyclictest1774-21snmpd19:32:116
3942018993027,2cyclictest3996744-21kworker/u32:2+events_unbound20:36:186
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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