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2026-06-05 - 00:27

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 Thu Jun 04, 2026 12:42:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1886891995849,6cyclictest421-21dbus-daemon08:46:052
1886889995330,14cyclictest151ktimers/007:21:010
1886890995140,7cyclictest1903397-21systemd-run08:05:011
188689099505,37cyclictest1987161-21ssh10:51:081
188689199462,5cyclictest171rcu_preempt11:21:042
1886890994535,7cyclictest1051-21mta-sts-daemon12:31:041
188689099453,35cyclictest1961988-21ssh10:11:051
1886890994532,10cyclictest2047492-21unixbench_multi12:26:161
1886891994437,3cyclictest0-21swapper/211:31:092
1886890994436,5cyclictest1897386-21grep07:45:011
1886890994436,5cyclictest1889911-21systemd-run07:20:011
1886890994436,5cyclictest1889911-21systemd-run07:20:011
188689099434,27cyclictest1922872-21diskmemload11:01:041
1886890994336,3cyclictest0-21swapper/109:26:141
1886889994338,2cyclictest0-21swapper/011:40:010
1886889994335,5cyclictest2048855-21systemd-run12:30:010
1886889994334,6cyclictest1903407-21unin-run08:05:020
1886889994232,7cyclictest0-21swapper/011:26:190
188689199415,33cyclictest2034290-21ssh12:06:032
1886891994133,3cyclictest0-21swapper/210:41:062
1886890994133,5cyclictest1943592-21tail09:41:151
1886890994132,6cyclictest420-21avahi-daemon09:31:041
1886890994131,6cyclictest2004788-21ssh11:20:011
1886890994033,4cyclictest2029945-21munin-run12:00:011
1886890994032,5cyclictest1975101-21unixbench_multi10:31:151
1886890994032,5cyclictest1975101-21unixbench_multi10:31:151
1886890994030,6cyclictest1894566-21latency_hist07:35:031
1886891993931,4cyclictest1051-21mta-sts-daemon10:15:022
1886890993931,3cyclictest0-21swapper/109:51:141
1886890993930,6cyclictest1912392-21systemd-run08:35:011
1886890993930,5cyclictest1903908-21fschecks_count08:05:561
1886891993828,7cyclictest421-21dbus-daemon10:08:412
1886891993817,16cyclictest351ktimers/207:41:072
1886890993830,5cyclictest1960720-21grep10:10:011
1886890993829,5cyclictest1051-21mta-sts-daemon09:48:021
1886890993827,7cyclictest1895869-21munin-plugin-st07:40:011
1886889993831,5cyclictest1954398-21ssh10:00:010
1886889993831,4cyclictest1973309-21sh10:30:000
1886889993831,4cyclictest1973309-21sh10:30:000
1886889993831,4cyclictest1914033-21latency_hist08:40:020
188689199375,7cyclictest171rcu_preempt11:01:002
1886891993730,4cyclictest2017362-21sendmail11:40:012
1886890993729,5cyclictest1929174-21idleruntime-cro09:20:001
1886890993726,8cyclictest1907884-21idleruntime-cro08:20:011
1886890993723,10cyclictest2009134-21ntp_kernel_err11:26:041
1886889993728,6cyclictest1086143-21cups-browsed12:38:230
188688999371,34cyclictest0-21swapper/007:41:020
1886891993630,3cyclictest0-21swapper/212:20:002
1886891993630,3cyclictest0-21swapper/209:05:002
1886891993630,3cyclictest0-21swapper/209:05:002
1886891993630,3cyclictest0-21swapper/207:40:012
1886891993628,5cyclictest1888366-21cron07:15:002
1886891993628,5cyclictest1888366-21cron07:15:002
1886891993625,8cyclictest1922872-21diskmemload11:15:552
188689199362,27cyclictest2043793-21ssh12:21:042
188689199362,26cyclictest1936864-21ssh09:31:092
188689199362,25cyclictest1971540-21ssh10:26:112
188689199362,25cyclictest1971540-21ssh10:26:112
188689199362,24cyclictest1952615-21ssh09:56:092
1886890993627,6cyclictest1901914-21latency_hist08:00:021
1886889993627,6cyclictest421-21dbus-daemon09:45:570
1886889993623,8cyclictest2034309-21sh12:06:040
1886889993622,11cyclictest1921370-21cron09:05:000
1886889993622,11cyclictest1921370-21cron09:05:000
1886889993619,12cyclictest12350irq/32-eth011:41:090
188688999361,28cyclictest2021787-21sh11:46:050
1886891993529,3cyclictest0-21swapper/212:35:012
1886891993524,8cyclictest2023693-21systemd11:50:022
188689099353,22cyclictest2012393-21ssh11:31:071
188689099353,14cyclictest1997293-21ssh11:06:271
1886890993523,9cyclictest1898256-21ntp_kernel_pll_07:46:021
188689099352,26cyclictest1990279-21ssh10:56:041
1886890993516,14cyclictest421-21dbus-daemon10:26:071
1886890993516,14cyclictest421-21dbus-daemon10:26:071
1886890993514,4cyclictest28-21ksoftirqd/111:46:011
1886890993511,7cyclictest28-21ksoftirqd/109:35:271
1886889993530,3cyclictest1922750-21tail09:06:130
1886889993530,3cyclictest1922750-21tail09:06:130
1886889993529,3cyclictest2004796-21munin-plugin-st11:20:010
1886889993529,3cyclictest0-21swapper/009:25:010
1886889993528,4cyclictest1924083-21ntp_kernel_pll_09:11:020
1886889993527,6cyclictest1981460-21grep10:41:140
1886889993525,7cyclictest0-21swapper/012:20:000
1886891993428,2cyclictest0-21swapper/210:35:012
1886891993428,2cyclictest0-21swapper/210:35:012
1886891993427,3cyclictest0-21swapper/210:46:142
1886891993426,4cyclictest0-21swapper/209:16:012
1886891993424,4cyclictest1055-21mta-sts-daemon07:51:012
1886891993413,4cyclictest0-21swapper/208:11:062
188689099343,23cyclictest1977666-21ssh10:36:021
188689099343,23cyclictest1924224-21ssh09:11:081
1886890993425,5cyclictest2037210-21ssh12:11:011
1886890993424,7cyclictest1-21systemd07:10:011
1886890993424,7cyclictest1-21systemd07:10:011
188689099342,22cyclictest2043892-21diskmemload12:21:081
1886889993425,6cyclictest420-21avahi-daemon10:01:200
1886889993424,7cyclictest2045695-21cron12:25:000
188688999342,29cyclictest1983990-21ssh10:46:030
1886889993412,13cyclictest12350irq/32-eth011:31:070
1886891993325,5cyclictest421-21dbus-daemon09:10:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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