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2026-09-07 - 03:06
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OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #e, slot #6

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 50 highest latencies:
System rackeslot6.osadl.org (updated Sun Sep 06, 2026 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
128151599151138,10cyclictest1213033-21systemd-journal10:55:010
128151799146135,8cyclictest1341361-21latency_hist10:15:021
128151799144135,6cyclictest1365240-21latency_hist11:30:021
128151799144135,6cyclictest1365240-21latency_hist11:30:011
128151799144132,9cyclictest1379555-21latency_hist12:15:021
128151799144132,9cyclictest1379555-21latency_hist12:15:011
128151799141131,7cyclictest1292863-21apt-get07:45:031
128151599134128,4cyclictest1320395-21kworker/u8:1+flush-179:009:35:010
128151799132121,8cyclictest1357284-21latency_hist11:05:021
128151799128117,8cyclictest1360457-21latency_hist11:15:011
128151599125118,4cyclictest1346174-21kworker/u8:2+events_unbound11:15:230
128151599123114,6cyclictest1378207-21kworker/u8:1+events_unbound12:25:000
128151599120113,4cyclictest1268463-21kworker/u8:1+events_unbound07:25:140
128151599120109,8cyclictest1352506-21latency_hist10:50:010
128151799119108,9cyclictest1357543-21apt-get11:05:111
128151599119112,5cyclictest1339565-21kworker/u8:3+events_unbound10:10:260
128151599119106,8cyclictest1328365-21kworker/u8:3+flush-179:009:35:200
128151799118107,8cyclictest1347728-21latency_hist10:35:011
128151599118111,5cyclictest1265256-21kworker/u8:3+flush-179:007:25:010
128151599116111,4cyclictest1346174-21kworker/u8:2+events_unbound10:45:000
128151599114107,5cyclictest1292909-21kworker/u8:0+events_unbound07:45:230
12815159911398,12cyclictest1213033-21systemd-journal11:25:010
128151799111103,6cyclictest1330238-21apt-get09:40:121
128151599111105,5cyclictest1307924-21kworker/u8:0+events_unbound08:40:250
128151599111103,5cyclictest1325187-21kworker/u8:0+flush-179:009:25:240
128151799110101,6cyclictest1298145-21apt-get08:00:111
12815159911099,8cyclictest510-21rs:main0
12815159910997,9cyclictest1386722-21diskstats12:35:180
12815159910997,9cyclictest1386722-21diskstats12:35:180
128151599109101,5cyclictest1379608-21kworker/u8:3+events_unbound12:30:180
12815159910897,8cyclictest1365498-21apt-get11:30:120
12815159910799,5cyclictest1379608-21kworker/u8:3+flush-179:012:25:250
12815159910597,6cyclictest1379608-21kworker/u8:3+events_unbound12:20:010
12815159910497,5cyclictest1320395-21kworker/u8:1+flush-179:010:00:170
12815159910495,6cyclictest1368468-21kworker/u8:3+flush-179:011:55:160
12815159910397,4cyclictest1357951-21kworker/u8:0+flush-179:011:05:220
12815159910396,5cyclictest1307924-21kworker/u8:0+flush-179:008:35:240
12815159910386,12cyclictest1213033-21systemd-journal12:05:000
12815159910291,9cyclictest1341618-21apt-get10:15:120
12815159910194,5cyclictest1265256-21kworker/u8:3+events_unbound07:40:000
12815159910193,5cyclictest1346174-21kworker/u8:2+events_unbound10:55:150
12815159910187,10cyclictest1346174-21kworker/u8:2+flush-179:011:10:160
12815179910089,8cyclictest1354092-21latency_hist10:55:001
12815179910085,12cyclictest1339527-21apt-get10:10:011
12815159910088,8cyclictest1268463-21kworker/u8:1+events_unbound07:30:220
1281515999991,5cyclictest1320395-21kworker/u8:1+events_unbound09:20:240
1281515999991,5cyclictest1302883-21kworker/u8:2+flush-179:008:55:220
1281515999988,7cyclictest1299476-21latency_hist08:05:010
1281515999986,8cyclictest1346174-21kworker/u8:2+events_unbound11:00:160
1281515999890,5cyclictest1360435-21kworker/u8:1+flush-179:011:35:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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