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2026-04-23 - 13:32
OSADL QA Farm

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 Thu Apr 23, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
23202119911296,12cyclictest2326463-21latency_hist19:30:011
23202099910798,6cyclictest2410051-21kworker/u8:2+flush-179:000:00:010
23202099910596,6cyclictest2341298-21latency_hist20:15:020
23202119910496,6cyclictest2324913-21kworker/u8:2+events_unbound19:30:021
2320209999587,5cyclictest2386116-21latency_hist22:35:010
2320211999383,7cyclictest2320069-21latency_hist19:10:011
2320211999181,7cyclictest2398843-21latency_hist23:15:011
2320211998880,6cyclictest2323278-21latency_hist19:20:011
2320211998578,5cyclictest2390893-21latency_hist22:50:011
2320211998479,4cyclictest2366197-21kworker/u8:0+events_unbound22:05:241
2320209998477,5cyclictest2366744-21kworker/u8:1+flush-179:021:40:000
2320209998372,8cyclictest2352486-21kworker/u8:3+flush-179:021:20:200
2320209998274,5cyclictest2397222-21kworker/u8:0+flush-179:000:05:200
2320211998176,4cyclictest2346113-21kworker/u8:0+events_unbound20:55:251
2320209998173,5cyclictest1213033-21systemd-journal20:05:000
2320211998076,3cyclictest2378402-21kworker/u8:3+flush-179:022:11:061
2320211998075,4cyclictest2352486-21kworker/u8:3+events_unbound21:20:141
2320209998074,4cyclictest2421446-21kworker/u8:2+flush-179:000:30:000
2320211997975,3cyclictest2378401-21kworker/u8:1+events_unbound22:15:201
2320211997973,4cyclictest2373109-21kworker/u8:2+events_unbound22:25:251
2320209997971,6cyclictest2324880-21latency_hist19:25:010
2320211997874,3cyclictest2373109-21kworker/u8:2+events_unbound22:40:221
2320211997868,8cyclictest2381597-21/usr/sbin/munin22:20:221
2320211997773,3cyclictest2306944-21kworker/u8:1+events_unbound19:35:201
2320209997668,5cyclictest2326962-21kworker/u8:3+events_unbound19:40:010
2320211997569,4cyclictest2373109-21kworker/u8:2+flush-179:022:55:041
2320211997470,3cyclictest2323258-21kworker/u8:0+events_unbound20:10:181
2320211997469,4cyclictest2397222-21kworker/u8:0+events_unbound23:20:261
2320209997347,23cyclictest1213033-21systemd-journal21:09:040
2320209997263,6cyclictest2408946-21diskstats23:45:150
2320211997166,4cyclictest2366197-21kworker/u8:0+events_unbound21:50:241
2320211997166,4cyclictest2320108-21kworker/u8:3+events_unbound19:10:131
2320209997163,6cyclictest2402037-21latency_hist23:25:010
2320209997162,7cyclictest2355891-21apt-get21:00:130
2320209997156,13cyclictest2349529-21apt-get20:40:120
2320209997156,13cyclictest2349529-21apt-get20:40:110
2320211997066,3cyclictest2323258-21kworker/u8:0+flush-179:019:20:241
2320211997065,4cyclictest2421446-21kworker/u8:2+flush-179:000:29:561
2320211997065,4cyclictest2352486-21kworker/u8:3+events_unbound21:10:181
2320211996964,4cyclictest2389353-21kworker/u8:0+flush-179:022:50:261
2320211996964,4cyclictest2352486-21kworker/u8:3+flush-179:021:00:261
2320211996963,4cyclictest2352486-21kworker/u8:3+events_unbound21:15:241
2320209996962,4cyclictest2323258-21kworker/u8:0+flush-179:019:30:160
2320211996863,4cyclictest2369989-21kworker/u8:3+flush-179:021:45:261
2320211996863,4cyclictest2352486-21kworker/u8:3+flush-179:020:54:551
2320209996855,10cyclictest510-21rs:main0
2320211996762,4cyclictest2397222-21kworker/u8:0+flush-179:000:37:151
2320211996762,4cyclictest2397222-21kworker/u8:0+flush-179:000:37:151
2320211996762,3cyclictest2337877-21kworker/u8:2+events_unbound20:05:151
2320209996758,6cyclictest2421446-21kworker/u8:2+events_unbound00:30:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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