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2026-04-20 - 17:35
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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 10 highest latencies:
System rackbslot7.osadl.org (updated Mon Apr 20, 2026 12:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
224069912229,82cyclictest0-21swapper/009:48:160
224069911832,11cyclictest0-21swapper/008:13:160
224069911534,13cyclictest0-21swapper/010:18:140
22406991146,27cyclictest26293-21timerandwakeup11:38:240
21131211112,63sleep121207-21tune2fs06:58:151
224069911041,14cyclictest2481-21ntp_kernel_pll_11:53:170
224069911041,14cyclictest2481-21ntp_kernel_pll_11:53:170
22406991094,35cyclictest14891-21latency_hist09:32:500
22406991093,37cyclictest24004-21cmp09:47:500
22406991093,28cyclictest16642-21/usr/sbin/munin08:23:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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