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2025-12-06 - 11:26
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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 100 highest latencies:
System rackbslot7.osadl.org (updated Sat Dec 06, 2025 00:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17261991203,62cyclictest30588-21apt-get23:08:511
17261991203,62cyclictest30588-21apt-get23:08:511
1106821140,5sleep111069-21apt-get21:38:371
172569911245,38cyclictest28015-21sh23:03:550
172569910944,27cyclictest6946-21taskset23:23:510
17269991076,76cyclictest406-21apt-get19:53:442
17269991063,78cyclictest6891-21apt-get23:23:442
17269991062,73cyclictest22958-21apt-get19:23:542
15762210610,66sleep015763-21/usr/sbin/munin19:03:390
172569910535,31cyclictest0-21swapper/020:18:400
17269991042,80cyclictest22073-21kworker/u17:1+ext4-rsv-conversion23:18:442
172569910354,21cyclictest32637-21apt-key19:53:310
172569910354,21cyclictest32637-21apt-key19:53:310
172569910342,24cyclictest23945-21seq23:53:440
172569910342,20cyclictest10152-21/usr/sbin/munin23:29:230
172569910338,26cyclictest6517-21sh21:31:000
224521020,8sleep30-21swapper/300:12:183
172619910248,48cyclictest8530-21apt-key20:18:321
172619910248,48cyclictest8530-21apt-key20:18:321
172619910242,10cyclictest0-21swapper/121:48:411
17261991023,39cyclictest17639-21grep20:44:011
172569910244,23cyclictest496-21/usr/sbin/munin00:08:510
172569910239,26cyclictest25243-21ssh22:02:540
172619910140,7cyclictest0-21swapper/121:34:361
172569910143,18cyclictest11362-21grep22:34:500
172569910141,23cyclictest7836-21grep20:14:050
172569910141,23cyclictest7836-21grep20:14:050
172569910140,24cyclictest11349-21ssh21:39:280
1337621010,7sleep20-21swapper/222:38:352
1337621010,7sleep20-21swapper/222:38:352
17261991005,34cyclictest10617-21grep20:23:531
172619910039,9cyclictest0-21swapper/123:59:031
17261991003,36cyclictest28080-21fschecks_time19:38:511
1726199994,41cyclictest32705-21runrttasks19:53:311
1726199994,41cyclictest32705-21runrttasks19:53:311
1726199993,51cyclictest10814-21chrt22:34:331
17256999942,22cyclictest18774-21ls20:49:200
17256999941,25cyclictest27187-21irqstats23:58:540
17256999941,22cyclictest2205-21if_err_eth021:23:550
17256999941,19cyclictest5664-21sensors22:24:060
17256999941,19cyclictest5664-21sensors22:24:060
17256999939,26cyclictest29987-21rm00:04:120
17256999939,26cyclictest29987-21rm00:04:120
17261999868,22cyclictest30446-21sh00:05:091
17261999868,22cyclictest30446-21sh00:05:091
17256999841,22cyclictest8819-21ssh00:23:530
17256999841,22cyclictest1374-21ssh21:23:070
17256999841,22cyclictest1374-21ssh21:23:070
17256999840,24cyclictest8462-21grep22:29:040
17256999840,24cyclictest8462-21grep22:29:040
17256999835,23cyclictest17754-21/usr/sbin/munin19:08:520
17261999736,11cyclictest0-21swapper/123:49:001
17261999736,11cyclictest0-21swapper/123:49:001
17261999735,16cyclictest0-21swapper/121:48:301
17261999735,16cyclictest0-21swapper/121:48:301
17261999734,10cyclictest0-21swapper/120:53:301
1726199973,33cyclictest22373-21fschecks_time20:58:511
17256999738,25cyclictest24289-21seq21:03:580
17256999736,22cyclictest0-21swapper/020:53:430
1726199963,39cyclictest30246-21cat23:08:311
1726199963,37cyclictest5438-21ntp_kernel_err22:24:001
1726199963,37cyclictest5438-21ntp_kernel_err22:24:001
17261999633,13cyclictest0-21swapper/120:19:401
1726199962,37cyclictest4598-21head20:04:031
1726199962,37cyclictest4598-21head20:04:031
17256999642,22cyclictest5888-21ssh23:22:010
17256999641,21cyclictest18794-21rm21:51:120
17256999640,24cyclictest21019-21ssh21:54:110
17256999640,20cyclictest25839-21ssh22:59:100
17256999640,19cyclictest23616-21ssh22:56:030
17256999640,19cyclictest23616-21ssh22:56:030
17256999637,27cyclictest21264-21rm22:52:280
17256999636,29cyclictest7936-21apt-get21:34:070
17256999636,26cyclictest355-21runrttasks22:06:110
17256999636,26cyclictest355-21runrttasks22:06:110
17256999636,22cyclictest0-21swapper/021:13:440
1726199954,37cyclictest6808-21latency_hist20:13:311
1726199954,37cyclictest6808-21latency_hist20:13:311
17261999542,12cyclictest207-21systemd-journal23:43:291
17261999542,12cyclictest207-21systemd-journal23:43:291
17261999531,13cyclictest0-21swapper/123:38:301
17256999540,25cyclictest30967-21sh22:12:320
17256999540,21cyclictest18047-21sh22:46:140
17256999539,22cyclictest32148-21ssh23:10:560
17256999539,22cyclictest32148-21ssh23:10:560
17256999539,20cyclictest2759-21ssh23:16:430
17256999538,27cyclictest17057-21rm23:40:470
17256999538,27cyclictest17057-21rm23:40:470
1726199944,37cyclictest31083-21latency_hist21:18:301
17261999435,14cyclictest28870-21sh22:08:481
17256999440,21cyclictest19458-21/usr/sbin/munin19:13:470
17256999438,20cyclictest29188-21latency_hist19:43:300
17256999436,25cyclictest11041-21sensors_temp20:24:040
17256999433,25cyclictest0-21swapper/023:35:550
17256999341,22cyclictest20389-21rm23:47:200
17256999339,23cyclictest7487-21rm00:20:580
17256999339,19cyclictest30135-21switchtime19:44:020
17256999338,22cyclictest21291-21fschecks_count19:18:490
17256999337,20cyclictest355-21runrttasks22:18:450
17256999336,22cyclictest27356-21ssh21:11:290
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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