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2025-12-03 - 14:23
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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 50 highest latencies:
System rackbslot7.osadl.org (updated Wed Dec 03, 2025 00:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
82539911752,7cyclictest0-21swapper/019:30:150
82729911366,41cyclictest9107-21sh22:45:042
82729911366,41cyclictest9107-21sh22:45:042
82539911338,15cyclictest0-21swapper/019:28:420
82539911338,15cyclictest0-21swapper/019:28:420
82539911034,20cyclictest15869-21modprobe21:08:390
8253991103,33cyclictest32554-21ps23:24:110
8253991103,33cyclictest32554-21ps23:24:110
82539910654,44cyclictest0-21swapper/021:09:220
82539910645,13cyclictest20393-21unixbench_multi21:14:160
82539910440,12cyclictest0-21swapper/020:44:160
8253991023,35cyclictest8245-21cyclictest19:08:440
8272991003,50cyclictest10996-21ssh22:48:562
827299983,37cyclictest24138-21fschecks_time19:54:032
827299972,39cyclictest24747-21ssh21:22:562
827299972,39cyclictest24747-21ssh21:22:562
8265999773,14cyclictest0-21swapper/122:38:421
825399964,44cyclictest11246-21ntpq21:54:100
825399964,44cyclictest11246-21ntpq21:54:100
752729611,58sleep17581-21timerandwakeup19:04:271
827299947,80cyclictest0-21swapper/220:53:512
827299922,70cyclictest2218-21ssh00:23:582
758329210,40sleep20-21swapper/219:04:282
827299913,34cyclictest22477-21/usr/sbin/munin22:14:182
825399914,30cyclictest1681-21ssh00:23:400
8272999045,37cyclictest15890-21diskmemload21:14:112
827299893,38cyclictest28457-21munin-run23:18:412
827299892,40cyclictest8052-21sendmail-msp23:38:402
827299892,40cyclictest8052-21sendmail-msp23:38:402
8272998847,36cyclictest8245-21cyclictest22:32:472
827299876,56cyclictest6241-21sshd20:38:592
8272998734,45cyclictest0-21swapper/219:43:422
827299873,37cyclictest17577-21wc19:34:072
8272998639,40cyclictest1769-21ssh00:23:422
827299863,35cyclictest1542-21latency20:24:072
827299863,33cyclictest27624-21/usr/sbin/munin20:04:092
827299863,31cyclictest355-21runrttasks21:02:092
827299863,29cyclictest355-21runrttasks19:52:192
827299862,32cyclictest30264-21ssh00:15:562
827299862,26cyclictest1733-21kworker/u19:3+rpciod21:58:512
827299856,62cyclictest28947-21apt-get23:18:562
827299853,39cyclictest30963-21taskset22:28:292
827299853,38cyclictest19226-21modprobe22:08:392
827299853,35cyclictest19967-21/usr/sbin/munin23:03:582
827299853,35cyclictest19967-21/usr/sbin/munin23:03:582
827299853,34cyclictest14677-21unixbench_singl19:24:172
827299853,34cyclictest14677-21unixbench_singl19:24:172
827299853,34cyclictest11487-21df23:43:582
827299853,28cyclictest14697-21cstates21:04:402
827299852,37cyclictest14980-21grep22:54:172
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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