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2025-07-03 - 08:54
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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 Thu Jul 03, 2025 00:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40409911134,9cyclictest0-21swapper/000:11:570
40409910826,12cyclictest0-21swapper/023:51:370
3948210763,26sleep11-21systemd19:06:361
40409910634,15cyclictest0-21swapper/021:16:550
40409910535,11cyclictest0-21swapper/021:41:360
4040991033,36cyclictest24697-21mailstats00:17:440
40409910329,13cyclictest0-21swapper/000:01:340
40409910247,48cyclictest4169-21kworker/u19:2-nfsiod22:24:380
40409910247,48cyclictest4169-21kworker/u19:2-nfsiod22:24:380
40409910244,51cyclictest9895-21ssh23:52:040
40409910235,8cyclictest0-21swapper/019:56:350
40409910235,8cyclictest0-21swapper/019:56:350
4040991023,28cyclictest19433-21proc_pri22:17:090
40409910135,9cyclictest0-21swapper/022:16:330
4040991013,33cyclictest31535-21fschecks_count20:31:550
40409910040,9cyclictest30791-21sh22:37:040
40409910040,9cyclictest30791-21sh22:37:040
40409910034,58cyclictest0-21swapper/019:11:580
4040991002,40cyclictest9330-21latency_hist22:56:360
4040991002,21cyclictest4225-21/usr/sbin/munin19:06:440
4040991002,21cyclictest18459-21latency_hist23:11:360
4040991002,21cyclictest18459-21latency_hist23:11:360
4040999933,8cyclictest0-21swapper/000:26:330
4040999931,9cyclictest0-21swapper/023:17:090
4040999931,8cyclictest0-21swapper/021:47:120
404099992,34cyclictest25165-21proc_pri22:27:050
404099992,32cyclictest27871-21modprobe20:21:320
404099983,38cyclictest31746-21apt-get00:31:470
4040999832,9cyclictest0-21swapper/020:06:550
404099973,36cyclictest26103-21grep21:32:140
4040999727,14cyclictest30396-21latency_hist22:36:370
4040999727,14cyclictest30396-21latency_hist22:36:370
404099964,29cyclictest18567-21/usr/sbin/munin23:12:120
4040999634,8cyclictest0-21swapper/019:22:110
4040999634,8cyclictest0-21swapper/019:22:110
404099963,30cyclictest8561-21runrttasks19:17:070
404099963,30cyclictest8561-21runrttasks19:17:070
404099963,23cyclictest5360-21/usr/sbin/munin20:52:110
404099963,23cyclictest5360-21/usr/sbin/munin20:52:110
4040999631,8cyclictest0-21swapper/019:46:370
404099962,37cyclictest9719-21wc22:56:520
404099962,27cyclictest24632-21sh23:21:550
404099954,31cyclictest12790-21fschecks_count23:01:550
404099953,32cyclictest5219-21taskset22:47:570
404099953,32cyclictest5219-21taskset22:47:570
4040999518,24cyclictest13351-21cut21:11:370
404099944,29cyclictest356-21runrttasks19:37:120
4040999436,20cyclictest19295-21kworker/u17:0+nfsiod21:23:020
4040999436,20cyclictest19295-21kworker/u17:0+nfsiod21:23:020
404099943,31cyclictest11103-21/usr/sbin/munin19:26:570
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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