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2026-07-22 - 20:54

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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 rack2slot7s.osadl.org (updated Wed Jul 22, 2026 12:43:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2981555997165,3cyclictest0-21swapper/109:55:471
2981555997165,3cyclictest0-21swapper/109:55:471
2981554996034,4cyclictest3048658-21fschecks_count10:00:380
2981554995934,4cyclictest3047945-21sendmail10:00:010
2981554995934,4cyclictest3047945-21sendmail10:00:010
2981555995748,6cyclictest3137246-21timerandwakeup12:25:551
2981556994937,8cyclictest0-21swapper/210:20:472
2981556994937,8cyclictest0-21swapper/210:20:472
2981556994840,2cyclictest0-21swapper/212:00:402
2981554994830,8cyclictest151ktimers/011:45:470
2981555994739,5cyclictest421-21dbus-daemon09:45:021
298155499475,36cyclictest3064298-21ssh10:25:520
2981554994740,2cyclictest0-21swapper/012:10:020
2981554994636,6cyclictest12650irq/32-eth010:20:470
2981554994636,6cyclictest12650irq/32-eth010:20:470
298155499462,32cyclictest3115637-21ssh11:50:470
298155499461,37cyclictest3109573-21ssh11:40:440
2981556994536,6cyclictest2998073-21systemd-run08:05:022
2981555994337,3cyclictest0-21swapper/110:20:011
2981555994336,4cyclictest1003-21mta-sts-daemon12:30:521
298155499435,29cyclictest3088434-21ssh11:05:460
2981554994333,7cyclictest2170916-21cups-browsed11:13:350
298155499432,35cyclictest3097521-21ssh11:20:460
298155499432,35cyclictest3097521-21ssh11:20:460
2981556994235,4cyclictest3023644-21sendmail09:20:012
2981556994233,6cyclictest0-21swapper/211:45:342
298155599423,34cyclictest3109697-21ssh11:40:501
2981555994232,2cyclictest0-21swapper/110:15:011
2981554994234,5cyclictest151ktimers/007:55:480
2981556994132,5cyclictest0-21swapper/211:00:442
2981556994128,10cyclictest3076197-21needreboot10:45:432
2981556994127,10cyclictest3097986-21timerwakeupswit11:20:592
2981556994127,10cyclictest3097986-21timerwakeupswit11:20:592
2981556994121,11cyclictest351ktimers/210:00:492
2981555994130,7cyclictest420-21avahi-daemon12:18:461
2981555994130,7cyclictest420-21avahi-daemon12:18:461
2981555994034,3cyclictest0-21swapper/110:55:031
2981555994032,5cyclictest3123620-21cron12:05:011
2981555994032,5cyclictest1003-21mta-sts-daemon11:15:461
2981555994032,5cyclictest1003-21mta-sts-daemon11:15:461
298155699394,8cyclictest171rcu_preempt11:30:462
2981556993931,5cyclictest3016067-21systemd-run09:05:022
2981556993930,6cyclictest3032790-21idleruntime-cro09:35:012
2981555993931,5cyclictest3129656-21grep12:15:011
2981555993931,5cyclictest3007058-21systemd-run08:35:011
2981555993931,4cyclictest1001-21mta-sts-daemon11:37:131
2981555993931,4cyclictest0-21swapper/111:10:491
298155599392,28cyclictest3082289-21ssh10:55:451
2981555993830,5cyclictest3051010-21systemd-run10:05:011
2981555993830,5cyclictest2998067-21systemd-run08:05:011
2981555993825,10cyclictest3120461-21sshd11:59:411
2981555993813,19cyclictest265-21systemd-journal10:20:441
2981555993813,19cyclictest265-21systemd-journal10:20:441
2981554993829,4cyclictest0-21swapper/010:40:470
2981556993730,3cyclictest0-21swapper/212:00:012
2981556993729,5cyclictest3081738-21aten_r2power_po10:55:362
2981556993729,5cyclictest3002579-21systemd-run08:20:012
2981556993729,4cyclictest1003-21mta-sts-daemon08:45:462
2981556993726,7cyclictest420-21avahi-daemon09:50:132
298155699371,28cyclictest3033873-21ssh09:35:462
2981555993727,5cyclictest1003-21mta-sts-daemon09:15:211
2981554993724,7cyclictest12650irq/32-eth009:45:460
2981556993627,6cyclictest420-21avahi-daemon09:45:492
2981556993624,9cyclictest665-21snmpd09:20:522
2981556993624,9cyclictest665-21snmpd09:20:522
2981555993630,3cyclictest0-21swapper/110:40:351
2981555993629,5cyclictest2981553-21cyclictest11:45:211
2981555993628,5cyclictest3087278-21cron11:05:011
2981555993628,5cyclictest2992577-21fschecks_time07:45:381
2981555993625,8cyclictest3014525-21munin-run09:00:011
2981554993629,4cyclictest2983032-21sh07:15:000
2981554993628,5cyclictest1-21systemd11:00:020
2981554993625,8cyclictest151ktimers/008:25:490
2981554993624,9cyclictest3072137-21run-parts10:40:010
2981556993528,4cyclictest3132679-21cut12:20:002
2981556993528,4cyclictest3132679-21cut12:20:002
2981556993528,4cyclictest2985083-21fschecks_time07:20:372
2981556993528,4cyclictest2985083-21fschecks_time07:20:372
2981556993525,6cyclictest265-21systemd-journal10:30:012
298155699352,23cyclictest3058133-21ssh10:15:482
2981556993511,8cyclictest3017534-21diskmemload11:40:512
298155599353,24cyclictest3052050-21ssh10:05:471
2981555993529,3cyclictest0-21swapper/111:50:421
2981555993527,5cyclictest421-21dbus-daemon09:55:021
2981555993527,5cyclictest3018254-21gltestperf09:10:361
2981555993526,6cyclictest750-21ntpd08:25:011
2981555993526,5cyclictest3066846-21sh10:30:391
298155599351,26cyclictest3097442-21ssh11:20:421
298155599351,26cyclictest3097442-21ssh11:20:421
2981554993528,4cyclictest3007107-21latency_hist08:35:020
2981554993527,4cyclictest0-21swapper/007:40:080
2981554993526,6cyclictest3137431-21grep12:25:560
2981554993523,9cyclictest0-21swapper/012:30:590
2981554993523,7cyclictest12650irq/32-eth010:10:450
298155499352,27cyclictest3133368-21ssh12:20:370
298155699343,24cyclictest3070237-21ssh10:35:472
2981556993425,6cyclictest1003-21mta-sts-daemon10:43:282
298155699342,25cyclictest3027837-21ssh09:25:492
298155599345,14cyclictest3030919-21ssh09:30:491
2981555993425,6cyclictest3025365-21unixbench_singl09:21:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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