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2026-07-19 - 16:07

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 Jul 19, 2026 12:43:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1520343996863,2cyclictest0-21swapper/111:30:441
1520343995750,3cyclictest1530912-21kworker/u8:6-xprtiod07:47:071
1520343995750,3cyclictest1530912-21kworker/u8:6-xprtiod07:47:071
1520344995641,12cyclictest694-21cron09:20:012
152034299528,31cyclictest1597049-21ssh10:15:420
152034499494,33cyclictest1657262-21sshd11:55:512
1520343994941,5cyclictest1658980-21sendmail12:00:011
152034499484,36cyclictest1633155-21ssh11:15:482
1520344994834,11cyclictest1605992-21sh10:30:432
1520343994838,5cyclictest0-21swapper/112:35:451
1520343994838,5cyclictest0-21swapper/112:35:451
1520344994740,3cyclictest0-21swapper/209:40:012
152034499473,34cyclictest1585011-21ssh09:55:472
1520343994737,5cyclictest0-21swapper/110:05:451
1520343994737,5cyclictest0-21swapper/110:05:451
1520343994737,4cyclictest0-21swapper/112:20:511
1520342994741,4cyclictest1670931-21ssh12:20:010
152034399465,33cyclictest1572803-21ssh09:35:471
1520343994638,5cyclictest1670948-21munin-run12:20:011
1520344994536,5cyclictest1679940-21cut12:35:012
1520344994435,6cyclictest1682936-21grep12:40:012
1520344994435,6cyclictest1682936-21grep12:40:012
1520344994435,5cyclictest1536915-21systemd-run08:05:012
1520343994438,3cyclictest0-21swapper/111:20:011
1520342994334,7cyclictest1586863-21munin-run10:00:010
1520344994232,6cyclictest1609632-21unixbench_singl10:35:562
1520343994235,3cyclictest0-21swapper/112:10:011
1520343994228,5cyclictest0-21swapper/110:35:461
1520342994236,4cyclictest1556388-21diskmemload11:05:550
1520342994235,4cyclictest1644377-21aten_r2power_cu11:35:310
1520344994132,4cyclictest0-21swapper/211:10:012
1520344994131,7cyclictest420-21avahi-daemon08:10:532
1520343994129,9cyclictest1647440-21aten2.4-expect11:40:321
1520344994030,7cyclictest1672228-21sshd12:20:512
1520344994030,6cyclictest420-21avahi-daemon09:49:152
1520343994032,5cyclictest1530903-21systemd-run07:45:011
1520343994032,4cyclictest1003-21mta-sts-daemon11:25:471
1520343994027,10cyclictest1576047-21mailstats09:40:501
1520342994029,3cyclictest1536917-21systemd08:05:010
1520342994024,13cyclictest724506-21cups-browsed11:05:020
1520344993933,2cyclictest0-21swapper/209:50:552
1520344993931,5cyclictest1565563-21systemd-run09:25:012
1520344993930,6cyclictest1-21systemd12:15:022
1520344993929,6cyclictest1001-21mta-sts-daemon10:56:562
1520343993932,5cyclictest1526918-21fschecks_time07:30:381
1520343993929,5cyclictest1000-21mta-sts-daemon09:26:411
1520342993931,5cyclictest420-21avahi-daemon09:32:540
1520344993831,4cyclictest1595999-21latency_hist10:15:012
1520344993831,4cyclictest1595999-21latency_hist10:15:012
1520344993830,5cyclictest724506-21cups-browsed08:15:492
1520344993829,6cyclictest1646975-21sendmail11:40:002
1520343993832,3cyclictest0-21swapper/111:00:021
1520343993831,5cyclictest1520341-21cyclictest09:15:021
1520343993831,5cyclictest1520341-21cyclictest09:15:021
1520343993831,3cyclictest0-21swapper/109:30:431
1520343993830,5cyclictest1626668-21gltestperf11:05:361
1520343993822,11cyclictest1593936-21needreboot10:10:401
1520343993822,11cyclictest1593936-21needreboot10:10:401
1520342993831,4cyclictest1662495-21aten_r2power_po12:05:330
1520342993831,4cyclictest1535501-21latency_hist08:00:020
1520342993830,5cyclictest1575216-21aten_r2power_fr09:40:320
1520342993829,6cyclictest1541380-21cron08:20:010
1520342993829,5cyclictest421-21dbus-daemon12:12:460
152034299382,30cyclictest724506-21cups-browsed11:10:440
1520344993728,6cyclictest421-21dbus-daemon09:30:012
1520344993725,7cyclictest0-21swapper/210:05:422
1520344993725,7cyclictest0-21swapper/210:05:422
152034399373,6cyclictest171rcu_preempt10:20:471
152034399373,4cyclictest171rcu_preempt11:50:461
1520343993727,5cyclictest1678437-21timerandwakeup12:30:551
1520342993731,4cyclictest1574706-21munin-run09:40:010
1520342993731,4cyclictest1000-21mta-sts-daemon10:27:060
1520342993731,3cyclictest0-21swapper/011:55:440
1520342993730,5cyclictest1001-21mta-sts-daemon08:35:460
1520342993730,4cyclictest0-21swapper/011:22:510
1520342993729,5cyclictest421-21dbus-daemon07:50:010
1520342993729,5cyclictest421-21dbus-daemon07:50:010
1520342993729,5cyclictest1565704-21latency_hist09:25:020
1520342993727,4cyclictest0-21swapper/007:40:460
1520342993721,11cyclictest1560573-21ssh09:15:490
1520344993628,5cyclictest1601967-21latency_hist10:25:012
1520344993628,5cyclictest1558040-21grep09:10:552
1520344993628,5cyclictest1558040-21grep09:10:552
1520343993630,3cyclictest0-21swapper/110:00:021
1520343993630,3cyclictest0-21swapper/108:35:011
1520343993628,5cyclictest1556413-21systemd-run09:10:011
1520343993628,5cyclictest1556413-21systemd-run09:10:011
1520342993627,6cyclictest1614889-21missed_timers10:45:400
1520342993627,6cyclictest12650irq/32-eth010:05:430
1520342993627,6cyclictest12650irq/32-eth010:05:430
1520344993526,6cyclictest421-21dbus-daemon10:45:352
1520344993525,7cyclictest1670948-21/usr/sbin/munin12:20:012
1520344993522,9cyclictest1636525-21timerwakeupswit11:20:552
1520343993525,7cyclictest1646951-21cron11:40:001
1520343993524,7cyclictest1660024-21ntp_kernel_err12:00:441
1520342993529,4cyclictest1554917-21systemd-run09:05:010
1520342993529,4cyclictest1554917-21systemd-run09:05:010
1520342993529,3cyclictest0-21swapper/010:45:010
1520342993528,4cyclictest1568587-21sh09:30:010
1520342993527,5cyclictest724503-21cupsd10:20:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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