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2025-07-01 - 05:34
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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
Characteristics of the 20 highest latencies:
System rackbslot1.osadl.org (updated Mon Jun 30, 2025 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18227072218189,19sleep20-21swapper/207:09:122
18224602213189,14sleep30-21swapper/307:06:083
18224632207183,14sleep10-21swapper/107:06:091
18227352206165,32sleep00-21swapper/007:09:340
1822972999941,56cyclictest1920349-21chrome08:45:001
1822969998535,47cyclictest1859552-21chrome07:45:010
1822977997066,3cyclictest1970064-21kworker/u8:2+events_unbound09:40:012
1822969996559,4cyclictest2102190-21latency_hist11:45:010
20760642620,3sleep01515611-13Compositor11:15:300
1822982996215,10cyclictest1859527-13Chrome_IOThread07:45:013
1822977996054,4cyclictest2041510-21latency_hist10:45:012
1822977996054,4cyclictest2041510-21latency_hist10:45:012
182297299570,1cyclictest2102460-21CacheThread_Blo11:45:011
182296999573,52cyclictest1920291-21chrome08:45:010
1822982995539,11cyclictest1935239-21latency_hist09:00:013
182297799550,1cyclictest19250irq/16-mmc010:45:012
1822969995451,2cyclictest1939497-31munin-html09:00:330
1822969995350,2cyclictest2096781-21kworker/u8:3+flush-179:012:10:190
1822982994942,5cyclictest2118112-21/usr/share/muni12:00:023
1822977994931,17cyclictest1934883-21kworker/u8:0+events_unbound09:10:182
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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