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2025-11-23 - 04:06

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.

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 Nov 23, 2025 00:39:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
98056995542,10cyclictest0-21swapper/123:59:151
98055995041,7cyclictest422-21dbus-daemon19:55:010
98057994834,9cyclictest0-21swapper/222:59:212
98057994834,9cyclictest0-21swapper/222:59:212
98056994839,6cyclictest453-21systemd-logind20:25:011
98056994834,11cyclictest283943-21sh00:29:121
98056994834,11cyclictest283943-21sh00:29:121
98055994836,10cyclictest12550irq/33-eth023:14:120
98056994732,10cyclictest224289-21ssh23:09:121
98056994730,14cyclictest159636-21missed_timers21:44:101
98056994635,8cyclictest137406-21mailstats21:14:211
98057994537,5cyclictest274151-21cron00:15:012
98057994537,5cyclictest122055-21systemd-run20:30:012
98057994535,6cyclictest2465701-21cups-browsed23:09:182
98056994537,5cyclictest270614-21true00:10:011
98056994431,10cyclictest1-21systemd21:35:011
98055994437,4cyclictest217694-21sendmail23:00:010
98055994437,4cyclictest217694-21sendmail23:00:010
98057994334,6cyclictest474-21in:imuxsock22:11:422
98055994336,5cyclictest141771-21ssh21:20:010
98055994336,5cyclictest141771-21ssh21:20:010
98055994324,14cyclictest151ktimers/000:19:130
98056994234,5cyclictest172120-21ssh22:00:011
98056994232,7cyclictest164210-21head21:49:261
98056994231,8cyclictest216844-21sh22:59:191
98056994231,8cyclictest216844-21sh22:59:191
98057994135,3cyclictest0-21swapper/223:24:192
98057994134,4cyclictest221476-21debian-sa123:05:012
98057994134,4cyclictest191237-21latency_hist22:25:022
98057994122,3cyclictest171rcu_preempt22:29:182
98056994134,3cyclictest0-21swapper/121:35:301
98056994132,4cyclictest0-21swapper/122:09:191
98057994032,5cyclictest152655-21unixbench_multi21:34:232
98056994032,5cyclictest288581-21cron00:35:001
98056994032,5cyclictest114538-21cron20:05:011
98056994020,9cyclictest271ktimers/123:54:101
98056994013,8cyclictest28-21ksoftirqd/121:19:181
98056994013,8cyclictest28-21ksoftirqd/121:19:181
98055994034,4cyclictest152310-21mailstats21:34:190
98055994026,8cyclictest151ktimers/021:09:160
98057993933,3cyclictest0-21swapper/222:00:012
98057993931,5cyclictest187339-21cron22:20:012
98057993931,5cyclictest148929-21tail21:29:292
98057993924,11cyclictest263320-21cups-browsed00:04:132
98056993931,4cyclictest0-21swapper/122:26:431
98056993930,6cyclictest422-21dbus-daemon23:25:021
98056993928,8cyclictest127796-21timerandwakeup20:49:231
98056993927,9cyclictest251482-21timerwakeupswit23:44:241
98055993932,5cyclictest1-21systemd22:00:010
98055993932,4cyclictest292104-21systemctl00:40:010
98055993927,9cyclictest0-21swapper/000:00:020
98057993830,5cyclictest246731-21fschecks_count23:39:042
98057993830,5cyclictest110070-21latency_hist19:50:022
98057993830,4cyclictest0-21swapper/222:34:142
98057993828,7cyclictest422-21dbus-daemon19:10:012
98057993827,7cyclictest957-21mta-sts-daemon23:52:262
98056993829,6cyclictest955-21mta-sts-daemon20:19:171
98056993829,6cyclictest190114-21needreboot22:24:101
98056993825,9cyclictest134033-21diskmemload22:19:061
98055993825,10cyclictest0-21swapper/023:09:100
98057993729,5cyclictest1-21systemd21:10:022
98057993729,4cyclictest0-21swapper/223:49:152
98057993729,4cyclictest0-21swapper/223:49:152
98057993728,6cyclictest474-21in:imuxsock20:16:172
98057993728,6cyclictest263320-21cups-browsed00:08:312
98056993730,5cyclictest111424-21grep19:54:231
98056993728,6cyclictest957-21mta-sts-daemon23:04:191
98056993725,6cyclictest0-21swapper/123:14:161
9805699372,29cyclictest657-21snmpd22:14:201
98055993726,8cyclictest248130-21sendmail23:40:020
98055993723,8cyclictest12450irq/32-eth022:54:170
98055993723,8cyclictest12450irq/32-eth022:54:170
9805599372,27cyclictest287762-21ssh00:34:170
98055993718,14cyclictest151ktimers/019:34:170
9805799368,22cyclictest209253-21ssh22:49:142
98057993628,5cyclictest134033-21diskmemload22:39:262
9805699363,25cyclictest273196-21ssh00:14:131
9805699363,24cyclictest205569-21ssh22:44:191
98056993627,6cyclictest209190-21ntp_kernel_err22:49:121
98056993627,5cyclictest698-21cron21:10:011
98055993630,4cyclictest221475-21idleruntime-cro23:05:010
98055993627,6cyclictest103098-21fschecks_time19:29:070
98055993627,4cyclictest0-21swapper/022:14:160
98055993622,4cyclictest0-21swapper/019:25:000
98055993622,4cyclictest0-21swapper/019:25:000
98057993528,4cyclictest131054-21kworker/u8:10-nfsiod21:00:012
98057993526,6cyclictest1690079-21ntpd22:54:152
98057993526,6cyclictest1690079-21ntpd22:54:152
98057993525,5cyclictest0-21swapper/200:34:152
98057993524,8cyclictest129515-21cron20:55:012
9805699354,25cyclictest167453-21ssh21:54:171
98056993529,3cyclictest0-21swapper/120:40:011
98056993529,3cyclictest0-21swapper/120:40:011
98056993526,6cyclictest232976-21latency_hist23:20:021
98055993528,4cyclictest185689-21aten2.4-expect22:19:030
98055993527,5cyclictest2465701-21cups-browsed21:46:220
98055993526,7cyclictest98007-21/usr/sbin/munin19:10:020
98057993429,2cyclictest0-21swapper/200:00:022
98057993428,3cyclictest0-21swapper/221:19:222
98057993428,3cyclictest0-21swapper/221:19:222
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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