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2026-05-25 - 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 Mon May 25, 2026 00:45:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
418998670,65rtkit-daemon0-21swapper/119:07:351
202077826732,2sleep120-21swapper/1219:08:514
202015826361,1sleep140-21swapper/1419:05:256
22235552590,0sleep100-21swapper/1022:25:252
201874725452,1sleep50-21swapper/519:05:1611
2021397995315,25cyclictest2779210-21thunderbird22:05:086
202046625331,21sleep30-21swapper/319:05:309
2021360995049,1cyclictest2055346-21kworker/u32:2+events_unbound21:15:118
2021360994847,1cyclictest2152964-21kworker/u32:0+events_unbound21:35:058
2021360994746,1cyclictest2055346-21kworker/u32:2+flush-259:022:00:058
2021360994746,1cyclictest2055346-21kworker/u32:2+events_unbound20:35:228
2021360994746,1cyclictest2055346-21kworker/u32:2+events_unbound20:35:218
2021360994634,12cyclictest2779309-21WRScene~ilder#120:43:488
2021360994534,1cyclictest2779309-21WRScene~ilder#120:01:318
2021360994533,10cyclictest2740927-21Isolated12:05:318
2021360994533,10cyclictest2740927-21Isolated12:05:318
2021360994532,11cyclictest2740927-21Isolated12:05:318
2021360994434,1cyclictest2740927-21Isolated12:05:318
2021360994434,1cyclictest2740927-21Isolated12:05:318
2021360994433,11cyclictest2740927-21Isolated12:05:318
2021360994433,11cyclictest2740927-21Isolated12:05:318
2021360994331,12cyclictest2779309-21WRScene~ilder#122:34:288
2021360994232,10cyclictest3465320-21IMAP21:44:318
2021360994230,10cyclictest2740927-21Isolated12:05:318
202056124138,2sleep90-21swapper/919:06:3915
2021360994039,1cyclictest2275071-21kworker/u32:0+events_unbound23:21:458
2021360994036,4cyclictest3465320-21IMAP20:06:288
202136099397,30cyclictest2779311-21WRRende~ckend#123:57:578
202086423936,2sleep60-21swapper/619:09:4912
202058823937,1sleep70-21swapper/719:06:5313
202139799382,11cyclictest0-21swapper/1420:04:196
202136099378,0cyclictest0-21swapper/223:41:298
2021360993733,4cyclictest2779210-21thunderbird00:32:458
2021360993722,15cyclictest2779309-21WRScene~ilder#119:28:308
202074623735,1sleep40-21swapper/419:08:2810
202139799360,11cyclictest0-21swapper/1420:59:146
202136099366,1cyclictest2779210-21thunderbird22:24:028
2021360993635,1cyclictest2779309-21WRScene~ilder#123:53:558
2021360993635,1cyclictest2740666-21firefox22:14:078
2021360993633,1cyclictest2740694-21glean.dispatche23:01:598
2021360993632,2cyclictest2080859-21kworker/u32:0+events_unbound20:21:098
2021360993631,3cyclictest2779309-21WRScene~ilder#121:34:208
2021360993631,3cyclictest2779291-21Compositor23:05:578
2021355993635,1cyclictest2314166-21kworker/u32:3+events_unbound23:40:150
202083123634,1sleep110-21swapper/1119:09:223
202080223634,1sleep100-21swapper/1019:09:052
202069823634,1sleep20-21swapper/219:07:548
2021399993535,0cyclictest0-21swapper/1522:46:177
202139799350,10cyclictest0-21swapper/1420:15:196
202139799350,10cyclictest0-21swapper/1419:53:206
2021383993526,1cyclictest1955124-21kworker/10:1+events20:49:362
202136099359,26cyclictest0-21swapper/222:44:048
2021360993534,1cyclictest2779309-21WRScene~ilder#100:26:238
2021360993532,0cyclictest0-21swapper/222:51:178
2021360993522,11cyclictest2779309-21WRScene~ilder#121:20:468
2021399993432,2cyclictest2275071-21kworker/u32:0+events_unbound00:20:187
202136699342,31cyclictest2779210-21thunderbird20:05:0110
202136099345,29cyclictest0-21swapper/222:45:258
202136099344,30cyclictest411rcuc/200:24:058
202136099344,30cyclictest0-21swapper/223:45:278
202136099344,1cyclictest2779309-21WRScene~ilder#121:03:508
2021360993433,1cyclictest2779309-21WRScene~ilder#120:52:088
2021360993431,3cyclictest0-21swapper/222:38:298
2021360993431,3cyclictest0-21swapper/222:16:378
2021360993430,1cyclictest2215790-21kworker/2:0-events22:27:418
202050023432,1sleep150-21swapper/1519:05:587
202049023431,2sleep80-21swapper/819:05:5014
202047623431,2sleep130-21swapper/1319:05:395
2021397993333,0cyclictest0-21swapper/1419:56:246
2021397993333,0cyclictest0-21swapper/1400:04:176
2021390993328,5cyclictest1774-21snmpd22:08:404
2021383993329,1cyclictest2379778-21kworker/10:0+events00:36:192
2021378993328,3cyclictest2779277-21Renderer23:30:1614
2021368993330,2cyclictest2093189-21kworker/u32:0+events_unbound20:45:2211
2021362993329,4cyclictest1774-21snmpd19:24:569
2021360993332,1cyclictest2087832-21kworker/u32:1+events_unbound20:56:438
202136099333,1cyclictest2779210-21thunderbird19:31:598
2021360993330,3cyclictest0-21swapper/221:07:258
2021360993330,0cyclictest0-21swapper/219:57:308
2021360993330,0cyclictest0-21swapper/200:35:268
2021355993331,2cyclictest2222341-21kworker/u32:4+flush-259:023:05:200
202074123331,1sleep00-21swapper/019:08:240
2021399993232,0cyclictest0-21swapper/1521:32:557
2021399993232,0cyclictest0-21swapper/1520:49:357
202139999320,29cyclictest0-21swapper/1519:40:137
202139799328,14cyclictest2779210-21thunderbird23:00:036
202139799328,11cyclictest0-21swapper/1421:43:116
2021390993229,3cyclictest1774-21snmpd21:48:524
202139099322,30cyclictest2779231-21glean.dispatche19:37:324
202139099320,1cyclictest2779210-21thunderbird19:26:054
2021387993230,2cyclictest2321716-21kworker/u32:4+flush-259:023:50:163
2021383993231,1cyclictest2339311-21kworker/u32:1+events_unbound00:05:192
2021383993228,1cyclictest2230271-21kworker/10:0+events22:35:502
2021371993230,1cyclictest1774-21snmpd22:19:4412
202136899320,29cyclictest0-21swapper/522:45:1511
202136899320,29cyclictest0-21swapper/519:55:1511
202136299320,31cyclictest2779210-21thunderbird19:17:549
2021360993232,0cyclictest0-21swapper/223:15:178
2021360993232,0cyclictest0-21swapper/223:15:178
2021360993232,0cyclictest0-21swapper/200:00:138
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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