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2026-03-29 - 06:00
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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 Mar 29, 2026 00:46:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2604212991277,119cyclictest0-21swapper/122:10:161
2604212991277,119cyclictest0-21swapper/122:10:161
260421399121103,18cyclictest0-21swapper/200:30:152
2604218999537,39cyclictest1-21systemd20:00:017
2604218999354,19cyclictest8750ktimers/700:35:267
2604218998323,39cyclictest2660925-21collect220:50:197
2604218997517,39cyclictest2667280-21taskset21:03:097
2604218997234,19cyclictest30750irq/60-ahci[0000:00:07.0]20:10:307
2604218997234,19cyclictest2607384-21aten2.4-expect19:15:137
2604218997133,19cyclictest2756551-21cat23:45:187
260421899689,59cyclictest101550irq/39-eno2-TxRx-022:30:107
260421899689,59cyclictest101550irq/39-eno2-TxRx-022:30:107
260421899679,39cyclictest2620948-21/usr/sbin/munin19:40:197
2604218996729,38cyclictest2699555-21timerandwakeup22:00:227
260421499678,19cyclictest0-21swapper/300:00:163
2604218996628,19cyclictest1086-21runrttasks22:43:227
260421899657,39cyclictest2782664-21latency_hist00:35:007
2604218996042,18cyclictest319-21ice-ptp-0000:f4:00.019:54:217
260421899602,39cyclictest1-21systemd00:25:007
2604218995920,39cyclictest2636329-21gcc20:05:197
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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