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2026-08-24 - 00:03

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 Sun Aug 23, 2026 12:42:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3837680997869,6cyclictest3934701-21kworker/u8:11-xprtiod11:25:591
383768099524,39cyclictest3975483-21ssh11:56:011
3837680995136,9cyclictest420-21avahi-daemon11:42:541
3837680994838,6cyclictest3963904-21unixbench_singl11:36:181
383768099481,34cyclictest3929749-21sh10:41:001
3837679994636,6cyclictest3032758-21cups-browsed08:36:020
3837681994535,6cyclictest3032758-21cups-browsed09:55:502
3837680994534,7cyclictest420-21avahi-daemon10:18:241
3837680994534,6cyclictest3867669-21munin-plugin-st08:50:011
3837680994436,5cyclictest3907306-21ssh10:05:011
3837681994333,6cyclictest3895290-21latency_hist09:45:022
3837680994334,4cyclictest0-21swapper/109:16:071
383768199422,29cyclictest3032758-21cups-browsed07:56:012
3837680994234,4cyclictest0-21swapper/112:20:021
3837680994231,6cyclictest3951732-21unixbench_singl11:16:151
3837679994234,5cyclictest3032758-21cups-browsed11:16:030
3837679994229,9cyclictest0-21swapper/011:10:010
3837679994229,11cyclictest3866151-40mandb08:43:400
3837679994221,15cyclictest12650irq/32-eth010:16:060
3837681994136,2cyclictest0-21swapper/211:00:012
3837681994133,5cyclictest485-21in:imuxsock11:22:492
3837681994132,5cyclictest4001668-21cut12:40:012
3837681994132,5cyclictest3869165-21cut08:55:012
383768099404,26cyclictest3032755-21cupsd09:36:011
3837680994032,5cyclictest3960000-21kernelversion11:30:551
3837680994032,5cyclictest3960000-21kernelversion11:30:551
3837680994030,5cyclictest0-21swapper/111:46:011
3837680994030,4cyclictest0-21swapper/111:01:051
383768099402,29cyclictest3948106-21ssh11:11:021
3837679994022,13cyclictest12650irq/32-eth011:56:020
383768199397,17cyclictest1002-21mta-sts-daemon08:43:462
3837681993931,4cyclictest0-21swapper/210:01:022
3837680993927,9cyclictest3899946-21sed09:51:131
383768099391,6cyclictest171rcu_preempt07:51:021
383768099391,31cyclictest3926772-21ssh10:36:031
3837679993931,6cyclictest3904254-21sendmail10:00:010
3837681993832,3cyclictest0-21swapper/210:21:052
3837681993831,3cyclictest0-21swapper/212:05:562
3837681993830,5cyclictest3873671-21diskmemload11:30:502
3837681993830,5cyclictest3873671-21diskmemload11:30:502
383768199381,30cyclictest3966462-21ssh11:41:082
383768099389,19cyclictest428-21mta-sts-daemon08:51:031
383768099387,5cyclictest0-21swapper/107:31:001
3837680993830,5cyclictest3934706-21systemd-run10:50:011
3837680993829,5cyclictest3990543-21missed_timers12:20:561
3837680993828,7cyclictest3980524-21latency_hist12:05:021
3837680993828,5cyclictest1002-21mta-sts-daemon10:59:591
3837680993828,5cyclictest0-21swapper/109:46:041
3837680993824,9cyclictest0-21swapper/108:43:481
3837680993823,12cyclictest1001-21mta-sts-daemon07:40:591
3837680993821,13cyclictest271ktimers/111:06:031
3837679993820,12cyclictest12650irq/32-eth009:21:010
3837681993731,3cyclictest0-21swapper/210:30:582
3837681993731,3cyclictest0-21swapper/210:30:582
3837681993730,4cyclictest3857173-21systemd-run08:15:012
3837681993727,6cyclictest567-21gdbus10:16:012
3837680993729,3cyclictest0-21swapper/110:00:011
3837680993728,6cyclictest420-21avahi-daemon09:05:011
3837680993728,6cyclictest420-21avahi-daemon09:05:011
3837680993728,5cyclictest3885969-21systemd-run09:30:011
3837680993727,7cyclictest3846657-21sendmail07:40:001
3837680993723,9cyclictest3910340-21cut10:10:011
3837679993730,4cyclictest3937738-21systemd-run10:55:010
3837679993730,4cyclictest3860173-21cron08:25:010
3837679993729,5cyclictest420-21avahi-daemon09:30:530
3837681993628,5cyclictest3879805-21idleruntime-cro09:20:012
3837681993628,5cyclictest3843675-21basename07:30:002
3837681993628,5cyclictest3843675-21basename07:30:002
3837681993627,5cyclictest1-21systemd11:10:012
383768099365,16cyclictest3972493-21ssh11:51:031
3837680993631,2cyclictest0-21swapper/108:00:011
3837680993627,6cyclictest265-21systemd-journal08:10:011
3837680993627,5cyclictest3876742-21munin-plugin-st09:15:001
3837680993626,6cyclictest1003-21mta-sts-daemon08:01:011
383768099362,20cyclictest3881165-21ssh09:21:071
3837680993615,16cyclictest566-21gmain07:46:051
3837679993630,4cyclictest3943837-21latency_hist11:05:020
383768199353,28cyclictest3963395-21ssh11:36:092
3837681993530,2cyclictest0-21swapper/211:20:012
3837681993529,3cyclictest0-21swapper/210:36:072
3837681993528,4cyclictest3912129-21unixbench_singl10:11:122
3837681993527,5cyclictest3883083-21latency_hist09:25:022
3837681993527,5cyclictest3872202-21systemd-run09:05:012
3837681993527,5cyclictest3872202-21systemd-run09:05:012
3837681993527,5cyclictest3842102-21unixbench_singl07:21:132
3837681993527,5cyclictest1002-21mta-sts-daemon11:05:012
3837680993526,6cyclictest3983997-21ssh12:10:501
3837680993523,8cyclictest3873677-21idleruntime-cro09:10:001
3837680993523,8cyclictest3873677-21idleruntime-cro09:10:001
383768099352,27cyclictest3887111-21ssh09:30:591
3837680993516,11cyclictest271ktimers/108:35:591
3837679993529,4cyclictest3893302-21ntp_kernel_pll_09:41:010
3837679993529,3cyclictest1001-21mta-sts-daemon10:46:060
3837679993528,4cyclictest4001654-21ssh12:40:010
3837679993527,5cyclictest420-21avahi-daemon11:12:570
3837679993521,10cyclictest12650irq/32-eth010:06:040
3837681993427,4cyclictest3901208-21cron09:55:012
3837681993426,5cyclictest421-21dbus-daemon12:35:022
3837681993425,6cyclictest3032755-21cupsd12:10:032
383768099344,18cyclictest428-21mta-sts-daemon12:26:051
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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