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2026-07-27 - 23:18

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 Mon Jul 27, 2026 12:43:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
398677099493,37cyclictest4023969-21ssh09:10:520
3986772994638,5cyclictest4113434-21ssh11:40:012
3986772994635,7cyclictest3196310-21cups-browsed11:05:462
3986771994637,6cyclictest4101504-21idleruntime-cro11:20:011
3986771994637,6cyclictest4101504-21idleruntime-cro11:20:011
3986772994234,5cyclictest3994270-21systemd-run07:35:012
3986771994234,5cyclictest4062178-21sh10:15:011
3986771994234,5cyclictest3196310-21cups-browsed08:25:021
3986771994233,6cyclictest1-21systemd12:00:121
3986772994133,5cyclictest4062176-21systemd-run10:15:012
3986771994134,4cyclictest1002-21mta-sts-daemon11:10:521
3986771994032,5cyclictest4018239-21cron08:55:011
3986771994028,8cyclictest4063601-21switchtime10:15:571
3986770994032,5cyclictest1-21systemd10:00:010
3986772993931,5cyclictest4056247-21latency_hist10:05:032
3986772993928,8cyclictest4110451-21sh11:35:012
3986771993932,4cyclictest4149296-21systemctl12:40:011
3986771993932,4cyclictest4022752-21diskmemload09:50:021
3986771993932,3cyclictest0-21swapper/110:35:521
3986771993931,5cyclictest3196310-21cups-browsed11:47:281
3986770993932,4cyclictest4018772-21fschecks_time08:55:410
3986770993930,6cyclictest4137327-21grep12:20:010
3986772993831,4cyclictest3992784-21systemd-run07:30:012
3986772993827,4cyclictest0-21swapper/210:05:532
3986770993831,4cyclictest4122380-21systemd-run11:55:020
3986770993831,4cyclictest4122380-21systemd-run11:55:020
3986770993831,4cyclictest4090315-21latency11:00:420
3986770993831,4cyclictest4016778-21systemd-run08:50:010
3986770993830,5cyclictest4077828-21aten_r2power_en10:40:370
3986770993829,6cyclictest421-21dbus-daemon12:01:130
3986770993828,4cyclictest4062886-21fschecks_time10:15:400
3986770993826,5cyclictest0-21swapper/007:15:500
3986772993729,5cyclictest4096753-21proc_pri11:10:552
3986772993727,6cyclictest3196307-21cupsd09:21:342
3986772993726,8cyclictest4053123-21sh10:00:012
3986771993730,3cyclictest0-21swapper/107:50:011
3986771993729,5cyclictest1-21systemd09:00:011
3986771993727,7cyclictest4030316-21switchtime09:21:001
3986771993726,7cyclictest3196310-21cups-browsed10:44:071
3986772993628,5cyclictest421-21dbus-daemon11:05:012
3986772993625,8cyclictest4141297-21missed_timers12:25:442
3986771993629,4cyclictest4140528-21latency_hist12:25:031
3986771993629,4cyclictest4140528-21latency_hist12:25:031
3986771993628,5cyclictest1-21systemd09:15:011
3986770993631,3cyclictest4040978-21munin-run09:40:000
3986770993628,5cyclictest1-21systemd09:35:020
3986770993628,5cyclictest1-21systemd09:35:020
3986772993528,2cyclictest0-21swapper/209:45:472
3986772993527,5cyclictest4119960-21aten_r2power_vo11:50:402
3986772993527,5cyclictest4119960-21aten_r2power_vo11:50:402
3986772993527,5cyclictest3196310-21cups-browsed09:29:282
3986772993526,6cyclictest3196310-21cups-browsed07:50:442
3986771993528,4cyclictest4122357-21grep11:55:011
3986771993528,4cyclictest4122357-21grep11:55:011
3986771993528,4cyclictest4015295-21latency_hist08:45:021
3986771993527,5cyclictest3991262-21cron07:25:011
3986771993526,6cyclictest420-21avahi-daemon09:19:301
3986770993530,3cyclictest4098494-21kworker/u8:4-xprtiod11:15:010
3986770993524,8cyclictest4050066-21sh09:55:010
3986770993524,7cyclictest0-21swapper/012:30:420
398677099351,29cyclictest4108596-21ssh11:30:500
3986772993426,5cyclictest4085051-21unixbench_multi10:51:012
3986772993425,6cyclictest439-21systemd-logind07:20:022
3986771993427,4cyclictest4001769-21idleruntime-cro08:00:011
3986771993427,4cyclictest1002-21mta-sts-daemon12:12:041
3986771993426,5cyclictest4111151-21sh11:35:411
3986771993426,5cyclictest4000119-21tail07:50:561
3986771993426,5cyclictest3992784-21systemd-run07:30:011
3986770993428,3cyclictest0-21swapper/010:58:120
3986770993426,6cyclictest4139071-21unixbench_singl12:21:000
3986770993426,6cyclictest4139071-21unixbench_singl12:21:000
3986770993423,4cyclictest4093913-21cat11:05:580
398677099342,26cyclictest4033031-21ssh09:25:490
3986770993419,11cyclictest12650irq/32-eth012:25:530
398677099340,29cyclictest4081454-21ssh10:45:470
398677099340,29cyclictest4081454-21ssh10:45:470
3986772993327,3cyclictest0-21swapper/212:00:492
3986772993325,5cyclictest4074466-21latency_hist10:35:032
3986772993325,5cyclictest4063863-21head10:15:592
3986772993324,7cyclictest4014580-21needreboot08:40:472
3986772993324,6cyclictest3196310-21cups-browsed11:29:402
398677199333,25cyclictest4072498-21ssh10:30:511
3986771993327,3cyclictest0-21swapper/107:20:011
3986771993326,4cyclictest4054805-21kworker/u8:0-xprtiod11:20:371
3986771993326,4cyclictest4054805-21kworker/u8:0-xprtiod11:20:371
3986771993326,4cyclictest4040970-21cron09:40:001
3986771993324,5cyclictest4135202-21kernelversion12:15:441
3986771993323,7cyclictest1000-21mta-sts-daemon09:30:531
3986771993323,7cyclictest1000-21mta-sts-daemon09:30:531
3986771993322,8cyclictest4020628-21ntp_kernel_pll_09:00:511
398677199332,26cyclictest4054329-21ssh10:00:531
398677099333,5cyclictest171rcu_preempt12:10:490
3986770993326,5cyclictest694-21cron10:55:000
3986772993227,2cyclictest0-21swapper/212:00:002
3986772993226,3cyclictest0-21swapper/212:10:012
3986772993225,5cyclictest0-21swapper/210:20:352
3986772993225,4cyclictest4133011-21grep12:11:002
3986772993225,4cyclictest4089514-21latency_hist11:00:022
3986772993224,5cyclictest421-21dbus-daemon09:20:022
3986772993224,5cyclictest4149499-21latency_hist12:40:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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