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2026-08-26 - 00:42

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 25, 2026 12:42:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3493031995949,6cyclictest1000-21mta-sts-daemon09:46:080
3493033995143,4cyclictest1002-21mta-sts-daemon11:30:592
3493032995143,5cyclictest3494531-21systemd-run07:15:011
3493031994932,11cyclictest12650irq/32-eth012:26:050
3493032994841,4cyclictest1000-21mta-sts-daemon11:58:331
3493032994841,4cyclictest1000-21mta-sts-daemon11:58:331
3493032994839,3cyclictest0-21swapper/111:31:051
3493032994738,6cyclictest1001-21mta-sts-daemon09:01:051
3493033994637,3cyclictest0-21swapper/209:46:002
3493032994536,6cyclictest3599764-21aten_r2power_fr11:05:511
3493032994531,4cyclictest0-21swapper/111:11:071
3493033994435,6cyclictest421-21dbus-daemon08:30:012
3493032994436,5cyclictest3606363-21needreboot11:15:591
3493032994335,3cyclictest0-21swapper/110:46:051
3493031994330,4cyclictest3538233-21latency_hist09:25:010
3493033994235,3cyclictest0-21swapper/211:00:012
3493033994234,5cyclictest3647749-21sh12:25:012
3493033994234,5cyclictest3512516-21munin-plugin-st08:15:012
349303299424,32cyclictest3569983-21sh10:16:041
3493032994234,5cyclictest3545388-21missed_timers09:35:571
3493032994234,5cyclictest3545388-21missed_timers09:35:571
3493032994233,6cyclictest3623619-21latency_hist11:45:021
349303299422,32cyclictest3609556-21ssh11:21:041
3493031994235,4cyclictest1000-21mta-sts-daemon08:31:080
3493033994129,9cyclictest1-21systemd10:25:012
349303299415,28cyclictest1002-21mta-sts-daemon10:31:011
3493032994130,8cyclictest3647743-21cron12:25:011
3493033994031,6cyclictest1-21systemd07:55:012
3493033994031,5cyclictest0-21swapper/210:16:052
3493032994031,5cyclictest1001-21mta-sts-daemon10:24:461
3493033993930,6cyclictest3521680-21latency_hist08:45:022
3493033993930,5cyclictest0-21swapper/210:35:012
3493032993932,4cyclictest1002-21mta-sts-daemon12:26:011
3493032993931,5cyclictest3502029-21basename07:40:011
3493032993930,7cyclictest3523034-21sh08:50:011
3493032993918,12cyclictest3529020-21diskmemload10:56:011
3493031993929,6cyclictest151ktimers/007:56:020
3493031993920,12cyclictest151ktimers/008:06:010
3493033993830,5cyclictest3650790-21latency_hist12:30:022
3493033993830,5cyclictest3622312-21unixbench_singl11:41:152
3493032993832,3cyclictest0-21swapper/109:55:011
3493032993826,9cyclictest3495357-21ntp_kernel_err07:16:031
349303299382,31cyclictest3560838-21ssh10:01:041
3493031993832,3cyclictest0-21swapper/011:26:070
3493031993831,4cyclictest1001-21mta-sts-daemon09:40:470
3493031993830,5cyclictest421-21dbus-daemon07:45:010
3493031993829,7cyclictest3559584-21idleruntime-cro10:00:010
349303399371,31cyclictest3588299-21ssh10:46:062
3493032993730,4cyclictest3627409-21gltestperf11:50:561
3493032993729,5cyclictest3653786-21systemd-run12:35:021
3493032993729,5cyclictest3516952-21unixbench_singl08:26:131
3493032993729,4cyclictest3521641-21latency_hist08:45:021
349303299372,31cyclictest2702384-21cups-browsed12:11:001
349303199374,24cyclictest3582103-21ssh10:36:030
349303199374,24cyclictest3582103-21ssh10:36:030
3493031993731,4cyclictest3541877-21aten_r2power_fr09:30:520
3493031993729,5cyclictest0-21swapper/010:07:480
3493031993728,7cyclictest421-21dbus-daemon10:25:010
3493031993722,13cyclictest3566635-21latency10:10:570
349303199371,26cyclictest3651999-21ssh12:31:050
3493033993630,3cyclictest0-21swapper/210:01:142
3493033993628,5cyclictest3559562-21ssh10:00:012
3493033993627,6cyclictest2702353-21cupsd07:40:012
3493033993625,8cyclictest3638762-21munin-plugin-st12:10:022
3493032993626,8cyclictest0-21swapper/108:40:011
3493032993626,6cyclictest750-21ntpd07:21:041
3493031993629,4cyclictest3578952-21needreboot10:30:590
3493031993628,4cyclictest3547637-21latency_hist09:40:030
3493031993628,4cyclictest3547637-21latency_hist09:40:030
3493033993527,5cyclictest3596939-21fschecks_time11:00:572
3493033993527,5cyclictest3591257-21ssh10:51:072
3493033993527,5cyclictest3532100-21ssh09:15:012
3493033993527,4cyclictest0-21swapper/211:56:022
3493033993527,4cyclictest0-21swapper/211:56:022
3493033993527,4cyclictest0-21swapper/211:51:482
3493033993511,5cyclictest171rcu_preempt08:21:042
3493032993526,4cyclictest0-21swapper/110:40:561
3493031993528,4cyclictest3501044-21fschecks_time07:35:540
3493031993527,3cyclictest151ktimers/009:11:070
3493031993524,8cyclictest420-21avahi-daemon11:51:110
3493033993428,3cyclictest0-21swapper/211:20:002
3493033993426,5cyclictest3614410-21ssh11:30:012
3493033993426,5cyclictest3576196-21proc_pri10:26:122
3493033993426,5cyclictest0-21swapper/207:45:002
3493033993425,4cyclictest0-21swapper/209:41:042
3493032993423,7cyclictest3636217-21munin-node12:05:521
349303299342,25cyclictest3563843-21sh10:06:031
349303299342,24cyclictest3536348-21ssh09:21:011
349303299342,22cyclictest3642995-21ssh12:16:061
349303199345,20cyclictest12650irq/32-eth010:46:060
3493031993428,4cyclictest3621472-21latency11:40:580
3493031993427,4cyclictest3643416-21unixbench-2d12:16:140
3493031993426,6cyclictest3586991-21idleruntime-cro10:45:000
3493031993426,5cyclictest420-21avahi-daemon11:03:510
349303199342,26cyclictest3633905-21ssh12:01:060
3493033993326,4cyclictest1001-21mta-sts-daemon07:21:052
3493033993326,4cyclictest1000-21mta-sts-daemon10:39:482
3493033993326,4cyclictest1000-21mta-sts-daemon10:39:482
3493033993325,5cyclictest3527516-21cron09:05:012
3493033993324,4cyclictest0-21swapper/210:06:162
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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