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2026-07-21 - 00:07
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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 Mon Jul 20, 2026 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
97314199144136,5cyclictest968367-21kworker/u8:0+flush-179:007:10:030
97314199144133,8cyclictest1008942-21kworker/u8:1+events_unbound09:05:250
97314699141126,12cyclictest1213033-21systemd-journal09:10:011
97314199135129,4cyclictest977030-21kworker/u8:0+events_unbound07:30:240
97314199132124,6cyclictest1015406-21kworker/u8:1+events_unbound09:35:010
97314199131125,4cyclictest1034931-21kworker/u8:1+events_unbound10:45:250
97314199130122,6cyclictest992293-21latency_hist08:10:020
97314199129119,8cyclictest1213033-21systemd-journal11:40:010
97314199129119,8cyclictest1213033-21systemd-journal11:40:010
97314199128110,5cyclictest1000801-21kworker/u8:3+flush-179:008:50:210
97314199127121,4cyclictest1022020-21kworker/u8:0+events_unbound09:55:250
97314199127121,4cyclictest1022020-21kworker/u8:0+events_unbound09:55:250
97314199126120,4cyclictest977030-21kworker/u8:0+events_unbound08:35:240
97314199125116,6cyclictest977030-21kworker/u8:0+events_unbound07:25:170
97314699124110,11cyclictest1213033-21systemd-journal12:40:011
97314199124119,4cyclictest1073443-21kworker/u8:0+events_unbound12:35:250
97314199124118,4cyclictest1050853-21kworker/u8:0+flush-179:011:25:230
97314199124116,5cyclictest987493-21kworker/u8:2+events_unbound07:55:020
97314199123115,5cyclictest1041305-21kworker/u8:2+events_unbound11:20:210
97314199122116,4cyclictest1067070-21kworker/u8:2+flush-179:012:00:150
97314199122109,10cyclictest510-21rs:main0
97314699121111,7cyclictest951632-21kworker/u8:2+flush-179:007:20:011
97314199120112,5cyclictest977030-21kworker/u8:0+events_unbound07:45:140
97314199119112,5cyclictest1058864-21kworker/u8:0+events_unbound11:40:200
97314699118108,7cyclictest1031778-21latency_hist10:10:011
97314199118112,4cyclictest1050853-21kworker/u8:0+flush-179:011:10:220
97314199118111,5cyclictest991765-21kworker/u8:1+events_unbound08:25:010
97314199116110,4cyclictest977030-21kworker/u8:0+flush-179:008:20:220
97314199115110,4cyclictest1030430-21kworker/u8:2+flush-179:010:30:240
97314199115107,5cyclictest1054112-21kworker/u8:1+events_unbound11:30:190
97314699113104,6cyclictest977030-21kworker/u8:0+flush-179:008:20:221
97314199113106,5cyclictest1034931-21kworker/u8:1+flush-179:010:35:160
97314699112102,8cyclictest1057836-21diskstats11:30:181
97314199112106,5cyclictest1034931-21kworker/u8:1+events_unbound10:25:010
9731469911199,9cyclictest1063679-21apt-get11:50:001
97314199111105,5cyclictest1015406-21kworker/u8:1+flush-179:009:35:170
97314199111105,4cyclictest987493-21kworker/u8:2+events_unbound07:55:230
9731469911095,13cyclictest1067145-21kworker/u8:3+flush-179:012:05:261
97314199110103,6cyclictest1034931-21kworker/u8:1+flush-179:010:40:240
97314199110103,5cyclictest1008942-21kworker/u8:1+events_unbound09:05:000
97314199110102,6cyclictest1018578-21kworker/u8:2+flush-179:009:45:210
9731419910997,9cyclictest1213033-21systemd-journal09:55:000
97314199109104,4cyclictest1000801-21kworker/u8:3+flush-179:009:10:250
97314199109104,4cyclictest1000801-21kworker/u8:3+flush-179:009:10:250
97314199109102,5cyclictest1015406-21kworker/u8:1+events_unbound09:25:180
97314199109100,6cyclictest1005805-21latency_hist08:50:000
9731469910899,6cyclictest1047705-21latency_hist11:00:011
97314199108103,4cyclictest895611-21kworker/u8:1+flush-179:007:15:270
9731469910791,14cyclictest1000801-21kworker/u8:3+flush-179:009:30:241
9731419910799,6cyclictest977030-21kworker/u8:0+events_unbound08:35:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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