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2026-05-04 - 02:11
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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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackfslot7.osadl.org (updated Sun May 03, 2026 12:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1712668991750,173cyclictest0-21swapper/512:25:115
17126629911416,79cyclictest1746977-21ntpq08:10:193
1712662999316,58cyclictest1865359-21ntpq11:45:193
1712662998911,59cyclictest1867903-21lpstat11:50:173
1712662998748,38cyclictest1808748-21date10:05:023
171266299866,59cyclictest1875680-21tune2fs12:05:133
1712662997818,40cyclictest1858917-21df11:35:133
171266299780,59cyclictest1835171-21ntp_states10:50:203
1712662997214,39cyclictest1831708-21fschecks_count10:45:143
1712662997213,39cyclictest1770324-21/usr/sbin/munin08:55:143
1712662996911,19cyclictest0-21swapper/311:07:223
1712662996626,19cyclictest236199-21snmpd12:22:373
1712662996323,19cyclictest0-21swapper/311:40:413
171266299602,39cyclictest1714067-21memory07:10:183
1712662995919,39cyclictest1086-21runrttasks07:41:283
1712662995719,19cyclictest1759926-21diskstats08:35:143
171266299570,38cyclictest0-21swapper/312:00:013
1712662995618,19cyclictest877-21mta-sts-daemon08:42:083
1712662995618,19cyclictest1774353-21ntpq09:00:203
1712662995617,39cyclictest1848010-21df_inode11:15:153
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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