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2025-03-22 - 16:48

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #5

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 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 rackeslot5s.osadl.org (updated Sat Mar 22, 2025 12:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
414099250,24cyclictest0-21swapper/108:36:071
414299240,0cyclictest0-21swapper/312:01:033
4141992422,1cyclictest0-21swapper/208:00:012
4140992421,2cyclictest24028-21grep10:19:591
414299230,2cyclictest7247-21latency_hist12:20:003
414299230,22cyclictest0-21swapper/307:49:593
4141992320,2cyclictest20818-21dump-pmu-power11:30:002
414199230,22cyclictest4918-21date09:29:592
414199230,22cyclictest14961-21awk11:14:592
4140992321,1cyclictest2271-21apt-get10:46:051
414099230,22cyclictest1504-21cron08:10:011
414099230,22cyclictest13471-21apt09:51:061
4139992320,2cyclictest22444-21dump-pmu-power09:00:000
4139992320,2cyclictest22444-21dump-pmu-power09:00:000
413999230,22cyclictest23343-21cron10:15:000
4142992220,1cyclictest15197-21cron12:35:003
414299220,21cyclictest28745-21munin-plugin-st11:50:003
414299220,21cyclictest0-21swapper/311:45:013
414299220,1cyclictest593-21dbus-daemon07:20:003
414299220,0cyclictest0-21swapper/309:51:063
4141992222,0cyclictest0-21swapper/209:51:052
4141992220,1cyclictest28720-21awk11:50:002
4141992220,1cyclictest14466-21apt-get07:31:062
414199220,21cyclictest7728-21apt-get11:01:012
414199220,21cyclictest6732-21apt10:55:012
414199220,1cyclictest612-21gdbus07:49:592
414199220,1cyclictest12593-21perf11:09:592
4140992220,1cyclictest7686-21wc09:34:591
4140992220,1cyclictest593-21dbus-daemon10:05:001
4140992220,1cyclictest0-21swapper/110:40:011
414099220,21cyclictest4897-21munin-run09:29:591
414099220,21cyclictest31300-21munin-run10:35:011
414099220,21cyclictest12595-21munin-run11:09:591
414099220,1cyclictest27972-21apt-get09:11:051
4139992220,1cyclictest32282-21apt-get10:41:020
4139992220,1cyclictest19056-21basename07:40:000
4139992220,1cyclictest0-21swapper/009:45:000
4139992217,4cyclictest29052-21cron08:00:000
4139992217,4cyclictest21168-21apt11:31:070
4139992216,5cyclictest0-21swapper/007:11:040
413999220,21cyclictest5333-21apt-get08:21:060
413999220,21cyclictest12438-21munin-run12:30:010
4142992120,1cyclictest0-21swapper/308:00:003
4142992120,0cyclictest0-21swapper/309:30:023
414299210,20cyclictest18928-21apt-get10:06:073
414299210,20cyclictest15847-21cron12:39:593
414299210,20cyclictest0-21swapper/307:51:063
414299210,1cyclictest29232-21apt-get10:31:093
414299210,1cyclictest16864-21apt-get07:36:063
414299210,0cyclictest0-21swapper/312:11:063
414299210,0cyclictest0-21swapper/308:26:083
4141992121,0cyclictest0-21swapper/207:11:022
4141992120,0cyclictest0-21swapper/210:06:072
4141992119,1cyclictest6577-21basename12:14:592
4141992119,1cyclictest21947-21grep10:11:082
4141992119,1cyclictest15220-21perf12:35:012
4141992118,2cyclictest31771-21idleruntime-cro11:59:592
414199210,20cyclictest6858-21apt-get07:16:062
414199210,20cyclictest0-21swapper/211:51:082
414199210,20cyclictest0-21swapper/208:51:052
4140992121,0cyclictest29075-21apt-get11:51:061
4140992121,0cyclictest24221-21apt-get11:41:011
4140992121,0cyclictest0-21swapper/110:21:011
414099210,20cyclictest12070-21apt-get07:26:051
414099210,1cyclictest4199-21munin-plugin-st12:09:591
414099210,0cyclictest26626-21apt-get11:46:071
414099210,0cyclictest0-21swapper/112:25:021
414099210,0cyclictest0-21swapper/111:25:021
4139992121,0cyclictest0-21swapper/009:00:010
4139992120,0cyclictest7729-21apt-get08:26:080
4139992119,1cyclictest18045-21perf11:25:000
4139992119,1cyclictest15219-21sh12:35:000
4139992119,1cyclictest0-21swapper/011:30:010
413999210,20cyclictest19720-21apt-get08:51:040
413999210,1cyclictest24571-21apt-get07:51:080
413999210,0cyclictest0-21swapper/007:16:070
4142992020,0cyclictest2127-21apt-get12:06:103
4142992020,0cyclictest18771-21apt-get11:26:053
4142992020,0cyclictest1865-21apt-get08:11:073
4142992020,0cyclictest0-21swapper/311:11:083
4142992020,0cyclictest0-21swapper/310:46:043
4142992020,0cyclictest0-21swapper/308:51:043
414299200,19cyclictest0-21swapper/310:01:023
414299200,0cyclictest0-21swapper/311:01:023
414299200,0cyclictest0-21swapper/309:26:073
414299200,0cyclictest0-21swapper/309:01:023
4141992020,0cyclictest0-21swapper/211:31:072
4141992020,0cyclictest0-21swapper/210:41:022
4141992020,0cyclictest0-21swapper/207:20:022
414199200,20cyclictest0-21swapper/210:31:092
414199200,20cyclictest0-21swapper/208:36:062
414199200,0cyclictest22428-21apt-get09:00:022
414199200,0cyclictest0-21swapper/209:11:062
414199200,0cyclictest0-21swapper/208:15:022
4140992020,0cyclictest0-21swapper/110:11:061
4140992020,0cyclictest0-21swapper/108:41:101
4140992020,0cyclictest0-21swapper/108:21:051
4140992019,0cyclictest9777-21ls08:29:591
414099200,20cyclictest0-21swapper/107:46:061
414099200,20cyclictest0-21swapper/107:21:071
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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