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2026-08-18 - 18:58

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 Tue Aug 18, 2026 12:42:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2677289995742,9cyclictest0-21swapper/211:30:592
2677289995742,9cyclictest0-21swapper/211:30:592
2677288995727,5cyclictest0-21swapper/110:50:581
2677288995630,22cyclictest1883844-21cups-browsed10:34:581
2677289995443,7cyclictest0-21swapper/209:00:002
2677289995345,5cyclictest2768400-21latency_hist10:40:032
2677289995038,7cyclictest420-21avahi-daemon11:21:592
2677289995038,7cyclictest420-21avahi-daemon11:21:592
2677289994837,7cyclictest421-21dbus-daemon12:35:022
2677289994837,7cyclictest421-21dbus-daemon12:35:022
2677289994837,6cyclictest0-21swapper/210:45:552
2677289994735,6cyclictest0-21swapper/210:15:552
267728799472,33cyclictest2763271-21ssh10:30:580
267728999462,34cyclictest2796665-21ssh11:26:002
267728799465,31cyclictest2723750-21ssh09:26:030
2677287994638,5cyclictest265-21systemd-journal10:55:590
2677289994536,6cyclictest2677293-21systemd-run07:10:012
2677289994533,8cyclictest2760852-21unixbench_multi10:26:112
2677287994526,15cyclictest0-21swapper/010:45:590
2677289994436,5cyclictest2683299-21systemd-run07:30:012
2677289994436,5cyclictest2683299-21systemd-run07:30:012
2677288994436,5cyclictest2716357-21ssh09:15:021
2677288994436,5cyclictest2716357-21ssh09:15:021
267728899442,31cyclictest2748228-21ssh10:06:061
267728899442,31cyclictest2748228-21ssh10:06:061
2677289994334,6cyclictest2684147-21sed07:30:592
2677289994334,6cyclictest2684147-21sed07:30:592
2677289994333,7cyclictest2725540-21/usr/sbin/munin09:30:022
2677289994332,7cyclictest1883844-21cups-browsed10:57:352
2677288994335,5cyclictest2787783-21ps11:11:051
2677288994234,5cyclictest2687803-21systemd-run07:45:011
2677288994229,9cyclictest265-21systemd-journal12:11:591
2677287994234,5cyclictest2729994-21processes09:36:060
267728999418,24cyclictest2790619-21ssh11:16:012
267728999418,24cyclictest2790619-21ssh11:16:012
2677289994134,4cyclictest0-21swapper/207:25:002
2677289994133,5cyclictest2698320-21latency_hist08:20:022
2677289994133,5cyclictest2680274-21munin-run07:20:012
2677288994132,6cyclictest2837624-21unin-run12:35:021
2677288994132,6cyclictest2837624-21unin-run12:35:021
2677288994132,5cyclictest2751707-21unixbench_multi10:11:111
2677288994132,5cyclictest2751707-21unixbench_multi10:11:111
2677287994131,5cyclictest0-21swapper/010:50:580
2677289994034,3cyclictest0-21swapper/209:40:582
2677289994020,5cyclictest171rcu_preempt12:01:012
2677288994032,5cyclictest1-21systemd10:40:011
2677287994025,12cyclictest0-21swapper/010:10:520
2677287994025,12cyclictest0-21swapper/010:10:520
2677289993929,6cyclictest2748267-21proc_pri10:06:062
2677289993929,6cyclictest2748267-21proc_pri10:06:062
2677288993930,6cyclictest2772592-21/usr/sbin/munin10:46:081
2677287993931,4cyclictest2830380-21grep12:21:110
2677287993931,4cyclictest2830380-21grep12:21:110
2677287993930,6cyclictest0-21swapper/012:30:560
2677287993930,6cyclictest0-21swapper/012:30:560
267728799391,33cyclictest1883844-21cups-browsed08:45:590
2677289993830,5cyclictest2816529-21cron12:00:012
2677288993830,5cyclictest2737779-21kworker/u8:0-rpciod10:01:061
2677288993826,9cyclictest2815069-21switchtime11:56:091
2677288993825,6cyclictest0-21swapper/112:26:051
2677287993829,5cyclictest2677299-21systemd-run07:10:010
2677287993827,6cyclictest2713734-21/usr/sbin/munin09:11:080
2677287993827,6cyclictest2713734-21/usr/sbin/munin09:11:080
2677287993826,6cyclictest12650irq/32-eth011:16:080
2677287993826,6cyclictest12650irq/32-eth011:16:080
2677287993824,9cyclictest151ktimers/011:56:030
2677287993824,10cyclictest0-21swapper/010:21:590
2677289993730,4cyclictest2812302-21grep11:51:102
267728999372,31cyclictest2787601-21ssh11:10:582
267728899375,5cyclictest171rcu_preempt10:56:081
2677288993729,5cyclictest2819590-21systemd-run12:05:021
2677288993729,5cyclictest2731718-21systemd09:40:021
2677288993729,4cyclictest2741004-21latency_hist09:55:031
267728899372,29cyclictest2720600-21ssh09:20:581
2677287993732,3cyclictest0-21swapper/011:51:010
2677287993731,4cyclictest2828576-21systemctl12:20:010
2677287993727,6cyclictest2771330-21latency_hist10:45:020
2677289993628,4cyclictest0-21swapper/209:10:592
2677289993628,4cyclictest0-21swapper/209:10:592
2677289993625,7cyclictest420-21avahi-daemon12:28:122
267728899363,24cyclictest2799607-21sh11:30:571
267728899363,24cyclictest2799607-21sh11:30:571
2677288993628,5cyclictest2793824-21proc_pri11:21:071
2677288993628,5cyclictest2793824-21proc_pri11:21:071
2677288993628,5cyclictest2698810-21fschecks_time08:20:531
267728899361,26cyclictest2796605-21ssh11:25:571
2677287993629,4cyclictest151ktimers/009:55:580
2677287993628,5cyclictest2738239-21aten_r2power_cu09:50:450
2677287993621,9cyclictest2787026-21aten_r2power_po11:10:480
2677287993612,17cyclictest151ktimers/012:10:570
2677289993529,3cyclictest0-21swapper/212:35:552
2677289993529,3cyclictest0-21swapper/212:35:552
2677289993528,3cyclictest0-21swapper/212:20:012
2677289993526,4cyclictest0-21swapper/209:36:022
2677289993525,7cyclictest2728601-21latency_hist09:35:022
267728899353,27cyclictest2802671-21sshd11:35:591
2677288993529,2cyclictest0-21swapper/109:20:011
2677288993528,5cyclictest0-21swapper/108:00:011
2677288993528,4cyclictest2759647-21aten_r2power_en10:25:481
2677288993527,5cyclictest1000-21mta-sts-daemon11:15:421
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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