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2026-05-23 - 21:35

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 Sat May 23, 2026 12:43:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
66328995342,7cyclictest106495-21latency_hist09:15:031
66328995342,7cyclictest106495-21latency_hist09:15:031
66327995314,11cyclictest151ktimers/012:31:010
66327995314,11cyclictest151ktimers/012:31:010
66328995239,7cyclictest141667-21kworker/u8:0-rpciod10:25:591
66327994921,22cyclictest251763-21kworker/u8:13+rpciod12:26:060
66327994833,12cyclictest91880-21latency_hist08:35:020
66329994720,22cyclictest538-21wpa_supplicant07:41:002
66329994720,22cyclictest538-21wpa_supplicant07:41:002
66328994721,6cyclictest155240-21kworker/u8:3-xprtiod10:51:031
66329994636,6cyclictest239772-21latency_hist12:00:022
66328994536,3cyclictest0-21swapper/109:26:021
66327994535,7cyclictest271833-21/usr/sbin/munin12:40:010
66328994435,5cyclictest189165-21timerwakeupswit10:56:091
66328994434,6cyclictest3459337-21cups-browsed09:30:551
66328994433,7cyclictest1055-21mta-sts-daemon11:11:431
66327994436,5cyclictest421-21dbus-daemon11:40:010
66327994428,13cyclictest155145-21munin-plugin-st10:15:010
66329994335,5cyclictest421-21dbus-daemon07:55:002
66329994331,7cyclictest199372-21cron11:10:002
66328994336,3cyclictest0-21swapper/110:05:591
6632799434,29cyclictest128094-21ssh09:41:020
6632799434,29cyclictest128094-21ssh09:41:020
66329994235,3cyclictest0-21swapper/209:40:012
66329994234,5cyclictest152144-21kernelversion10:10:532
66328994233,4cyclictest0-21swapper/111:15:591
66328994231,6cyclictest0-21swapper/112:36:001
66327994232,7cyclictest0-21swapper/011:45:010
66329994136,2cyclictest0-21swapper/211:20:012
66329994133,5cyclictest223585-21munin-run11:40:002
66328994128,9cyclictest102310-21diskmemload11:20:591
66328994118,7cyclictest0-21swapper/108:16:031
66329994034,3cyclictest0-21swapper/210:45:012
66329994029,7cyclictest0-21swapper/209:15:472
6632899408,5cyclictest102310-21diskmemload10:36:051
6632899404,28cyclictest140250-21ssh09:56:011
6632899403,27cyclictest220929-21ssh11:35:581
66328994032,5cyclictest183437-21latency_hist10:50:031
66328994031,6cyclictest600-21gmain10:20:001
66327994033,4cyclictest159202-21munin-run10:20:000
66329993931,5cyclictest99346-21latency_hist09:00:022
66329993931,5cyclictest227630-21systemd-run11:45:012
66329993929,6cyclictest0-21swapper/212:15:012
66328993912,8cyclictest171rcu_preempt08:36:021
66327993932,4cyclictest235631-21cron11:55:010
66329993832,3cyclictest0-21swapper/211:00:012
66329993831,3cyclictest0-21swapper/210:20:002
66329993828,7cyclictest255776-21/usr/sbin/munin12:20:022
6632899384,27cyclictest136159-21ssh09:51:001
66328993830,5cyclictest255762-21cron12:20:011
66328993829,6cyclictest212911-21ntpq11:25:591
66328993829,6cyclictest212911-21ntpq11:25:591
66328993829,5cyclictest248629-21fschecks_count12:10:481
66327993832,3cyclictest1056-21mta-sts-daemon11:56:050
66327993830,5cyclictest421-21dbus-daemon09:25:010
66327993830,5cyclictest421-21dbus-daemon09:10:020
66327993824,12cyclictest167210-21munin-plugin-st10:30:010
66329993730,3cyclictest0-21swapper/210:05:552
66329993729,4cyclictest0-21swapper/210:00:012
66329993728,6cyclictest195367-21basename11:05:002
66329993728,6cyclictest163945-21aten_r2power_fr10:25:482
66329993727,6cyclictest0-21swapper/210:55:032
6632999372,29cyclictest233184-21ssh11:51:082
66328993730,4cyclictest126573-21cron09:40:011
66328993729,5cyclictest67831-21systemd-run07:15:011
6632899372,29cyclictest144269-21ssh10:00:581
66328993714,6cyclictest171rcu_preempt08:40:571
66327993731,4cyclictest97713-21unixbench_singl08:51:080
66327993729,5cyclictest3459337-21cups-browsed11:34:200
66327993728,6cyclictest3459337-21cups-browsed10:03:240
6632999363,26cyclictest180633-21ssh10:46:002
66329993630,3cyclictest0-21swapper/212:30:162
66329993630,3cyclictest0-21swapper/212:30:162
66329993628,4cyclictest0-21swapper/211:11:112
66328993629,3cyclictest0-21swapper/112:05:031
66328993629,3cyclictest0-21swapper/109:21:011
66328993628,5cyclictest257601-21timerandwakeup12:21:081
66328993628,5cyclictest171230-21cron10:35:011
66328993627,6cyclictest75344-21systemd-run07:40:011
6632999354,24cyclictest103668-21ssh09:10:592
6632999354,24cyclictest103668-21ssh09:10:592
66329993528,4cyclictest259827-21munin-plugin-st12:25:012
66329993526,6cyclictest85818-21systemd-run08:15:012
66329993524,8cyclictest78322-21sh07:50:012
66328993529,3cyclictest0-21swapper/107:10:011
66328993527,5cyclictest130796-21latency_hist09:45:031
66328993527,5cyclictest130796-21latency_hist09:45:031
66328993525,4cyclictest0-21swapper/110:20:581
66327993531,2cyclictest0-21swapper/011:20:010
66327993529,2cyclictest0-21swapper/011:11:160
66327993528,4cyclictest231660-21ssh11:50:010
66327993527,5cyclictest421-21dbus-daemon09:40:010
66327993527,5cyclictest132678-21unixbench_singl09:46:100
66327993527,5cyclictest132678-21unixbench_singl09:46:100
66327993525,7cyclictest1-21systemd09:55:490
6632799352,25cyclictest659-21snmpd08:06:000
6632999343,23cyclictest208919-21ssh11:21:002
66329993426,4cyclictest79807-21kworker/u8:2-xprtiod10:03:022
66329993425,6cyclictest172168-21uniq10:35:502
66328993427,4cyclictest0-21swapper/111:10:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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