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2025-11-27 - 20:38

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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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  Intel
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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack5slot4s.osadl.org (updated Thu Nov 27, 2025 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26012042660,2sleep3586-21kworker/3:2+events08:01:143
2547507996256,5cyclictest2772710-21kworker/u8:0+flush-8:011:01:281
2547507995751,4cyclictest2842948-21kworker/u8:1+events_unbound12:31:231
2547507995649,5cyclictest2594638-21kworker/u8:0+flush-8:008:16:231
2547507995649,5cyclictest2594638-21kworker/u8:0+flush-8:008:16:231
2547507995645,8cyclictest2638411-21ntpq08:36:181
2547507995550,4cyclictest2649436-21kworker/u8:1+events_unbound09:06:171
2547507995449,3cyclictest2634051-21kworker/u8:3+flush-8:010:56:221
2547507995446,6cyclictest2634051-21kworker/u8:3+events_unbound10:41:231
2547505995438,13cyclictest2599694-21apt-get08:01:050
2547510995224,9cyclictest282-21systemd-journal11:40:012
2547507995245,5cyclictest2649436-21kworker/u8:1+flush-8:010:21:231
2547505995235,14cyclictest2808474-21apt-get11:31:070
2547507995143,5cyclictest2803446-21kworker/u8:3+flush-8:012:01:201
2547507995141,8cyclictest2817211-21ntpq11:36:251
2547507995042,5cyclictest2852653-21latency_hist12:15:011
2547507995039,8cyclictest2628494-21ntpq08:26:201
28052742490,4chrt371rcuc/211:26:192
2547507994944,4cyclictest2649436-21kworker/u8:1+events_unbound11:26:251
2547507994943,4cyclictest2649436-21kworker/u8:1+events_unbound10:46:241
27699422480,2sleep2371rcuc/210:51:162
2547507994843,4cyclictest2733162-21kworker/u8:2+flush-8:010:31:121
2547507994841,5cyclictest2793320-21latency_hist11:15:011
2547505994840,5cyclictest2668997-21latency_hist09:10:010
2547507994743,3cyclictest1719994-21kworker/u8:4+flush-8:007:16:271
2547507994742,4cyclictest2733162-21kworker/u8:2+events_unbound10:26:121
2547507994741,4cyclictest2817719-21kworker/u8:0+events_unbound12:36:211
2547507994741,4cyclictest2649436-21kworker/u8:1+flush-8:009:01:261
2547507994740,5cyclictest2713748-21kworker/u8:0+events_unbound09:56:251
2547507994740,5cyclictest2649436-21kworker/u8:1+flush-8:009:41:221
2547507994738,7cyclictest2673184-21ntpq09:11:231
2547505994738,7cyclictest2702872-21ntpq09:41:220
2547505994737,7cyclictest282-21systemd-journal09:30:000
2547510994626,7cyclictest282-21systemd-journal07:36:212
2547507994641,3cyclictest2634051-21kworker/u8:3+events_unbound10:16:161
2547507994640,4cyclictest1110744-21kworker/u8:2+flush-8:007:36:251
2547505994637,7cyclictest2833140-21/usr/sbin/munin11:56:220
2547505994634,9cyclictest2866545-21ntpq12:26:190
2547507994541,3cyclictest2778202-21kworker/u8:2+flush-8:011:51:271
2547507994541,3cyclictest2644021-21kworker/u8:0+flush-8:008:51:181
2547507994540,4cyclictest2634051-21kworker/u8:3+flush-8:010:01:221
2547507994539,4cyclictest2547220-21kworker/u8:0+flush-8:007:41:261
2547507994535,7cyclictest2707815-21ntpq09:46:231
2547505994537,6cyclictest2623500-21ntpq08:21:190
2547507994438,4cyclictest2634051-21kworker/u8:3+flush-8:009:16:221
2547505994423,18cyclictest2838091-21/usr/sbin/munin12:01:170
2547507994339,3cyclictest2649436-21kworker/u8:1+events_unbound09:55:011
2547507994338,4cyclictest2569639-21kworker/u8:1+events_unbound07:51:241
2547507994338,4cyclictest1110744-21kworker/u8:2+flush-8:007:21:231
2547507994338,3cyclictest2634051-21kworker/u8:3+flush-8:010:11:141
2547507994336,5cyclictest2634051-21kworker/u8:3+events_unbound08:35:011
2547505994335,6cyclictest1110744-21kworker/u8:2+flush-8:008:31:270
2547510994233,7cyclictest282-21systemd-journal12:40:002
2547507994238,3cyclictest2594638-21kworker/u8:0+events_unbound08:11:111
2547507994238,3cyclictest2594638-21kworker/u8:0+events_unbound08:11:111
2547507994237,4cyclictest1110744-21kworker/u8:2+events_unbound07:46:251
2547507994234,6cyclictest2842948-21kworker/u8:1+flush-8:012:26:211
2547505994233,7cyclictest2728340-21apt-get10:10:000
2547505994224,15cyclictest2712648-21ntpq09:51:220
2547507994137,3cyclictest2817719-21kworker/u8:0+flush-8:012:16:291
2547507994135,4cyclictest2649436-21kworker/u8:1+events_unbound11:06:211
2547507994133,6cyclictest1110744-21kworker/u8:2+flush-8:008:06:211
2547507994132,7cyclictest2772697-21ntpq10:51:211
2547505994123,16cyclictest2832471-21unixbench_multi11:51:280
2547507994034,5cyclictest2649436-21kworker/u8:1+flush-8:009:31:231
2547507994034,4cyclictest1110744-21kworker/u8:2+flush-8:007:26:161
2547507993934,4cyclictest2778202-21kworker/u8:2+flush-8:011:46:191
2547507993934,3cyclictest2733162-21kworker/u8:2+events_unbound10:36:181
2547507993932,5cyclictest2648321-21ntpq08:46:241
2547507993929,8cyclictest2802317-21ntpq11:21:221
2547505993931,6cyclictest2818591-21diskstats11:41:120
2547505993921,16cyclictest2599341-21cron08:00:000
2547507993832,4cyclictest2842949-21kworker/u8:4+flush-8:012:06:201
2547507993831,5cyclictest2634051-21kworker/u8:3+flush-8:009:36:251
25470802384,9sleep10-21swapper/107:08:521
2547507993732,4cyclictest2634518-21kworker/u8:4+events_unbound08:41:231
2547505993721,14cyclictest2654714-21tr08:56:100
2547505993720,15cyclictest2744736-21irqrtprio10:26:140
2547505993715,19cyclictest282-21systemd-journal10:20:030
2547507993630,4cyclictest1110744-21kworker/u8:2+flush-8:007:31:201
2547505993627,7cyclictest2797370-21ntpq11:16:220
2547505993621,13cyclictest2678922-21sendmail09:20:000
2547505993618,16cyclictest2868294-21sort12:31:150
2547505993618,16cyclictest2555544-21irqrtprio07:16:150
2547505993615,19cyclictest2792475-21ntpq11:11:210
2547505993612,7cyclictest2803171-21cron11:25:000
2547510993526,7cyclictest282-21systemd-journal07:35:002
2547507993529,4cyclictest1719994-21kworker/u8:4+events_unbound07:11:241
2547507993529,4cyclictest1110744-21kworker/u8:2+events_unbound08:01:211
2547507993527,6cyclictest2634051-21kworker/u8:3+flush-8:009:26:221
2547505993521,12cyclictest2683859-21munin-plugin-st09:25:000
2547505993519,14cyclictest0-21swapper/007:45:000
2547505993519,14cyclictest0-21swapper/007:30:010
2547505993518,15cyclictest2625004-21fschecks_count08:26:110
2547505993517,16cyclictest2650098-21sort08:51:160
2547505993514,18cyclictest2784311-21sort11:06:150
2547505993513,20cyclictest0-21swapper/010:42:010
27390542340,6sleep3451irq_work/310:21:073
2547507993429,4cyclictest2817719-21kworker/u8:0+flush-8:012:21:151
2547507993428,4cyclictest2803446-21kworker/u8:3+flush-8:011:31:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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