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2026-05-19 - 16:47
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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 Tue May 19, 2026 12:44:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27528215812,121sleep127567-21/usr/sbin/munin06:56:201
28716991336,97cyclictest3625-21apt-get09:01:130
28716991336,97cyclictest3625-21apt-get09:01:130
28716991329,105cyclictest23353-21apt-get11:21:120
28716991163,24cyclictest5926-21open_inodes10:51:250
28716991162,23cyclictest24648-21seq09:35:000
28716991143,28cyclictest6508-21sh09:58:230
287169911427,56cyclictest0-21swapper/009:36:270
28716991093,26cyclictest10424-21sh11:53:030
28716991093,26cyclictest10424-21sh11:53:030
28716991093,23cyclictest17759-21ssh09:22:230
28716991093,21cyclictest26109-21ssh12:20:170
28716991092,30cyclictest4933-21latency_hist10:50:550
28716991082,29cyclictest18319-21ssh11:11:320
28716991052,23cyclictest27232-21sed12:21:210
28716991043,24cyclictest28717-21cat07:00:550
28716991042,22cyclictest24161-21rm10:27:500
28716991042,22cyclictest24161-21rm10:27:500
28716991032,24cyclictest23133-21ssh12:15:230
28716991032,24cyclictest23133-21ssh12:15:230
28730991022,42cyclictest14334-21taskset10:11:232
287169910246,50cyclictest1791-21ssh09:51:070
28716991023,25cyclictest32109-21timerandwakeup09:46:280
28716991023,25cyclictest32109-21timerandwakeup09:46:280
28716991023,22cyclictest3491-21seq08:59:210
28716991023,22cyclictest3491-21seq08:59:210
28716991022,35cyclictest28270-21runrttasks09:41:060
28716991013,25cyclictest30979-21ssh11:33:010
28716991013,25cyclictest12553-21ssh11:02:080
28716991013,23cyclictest27390-21diskmemload10:32:510
28716991012,23cyclictest31424-21ssh12:28:290
28716991003,25cyclictest9273-21ssh10:02:490
28716991003,25cyclictest9273-21ssh10:02:490
28716991003,24cyclictest22020-21ssh10:25:120
28716991003,23cyclictest12555-21wc11:56:250
28721999947,8cyclictest0-21swapper/107:31:501
28721999931,24cyclictest1-21systemd12:30:511
2871699993,21cyclictest6900-21/usr/sbin/munin11:46:330
2871699992,73cyclictest17241-21ntp_offset10:16:200
2871699992,27cyclictest12127-21fschecks_time07:46:140
2871699992,25cyclictest2374-21systemd-journal09:17:150
2871699992,24cyclictest21995-21taskset11:18:330
2871699992,24cyclictest21995-21taskset11:18:330
2871699992,22cyclictest17085-21latency_hist11:10:550
28730999846,8cyclictest0-21swapper/210:21:262
2871699983,22cyclictest12689-21ssh09:15:320
2871699982,23cyclictest184982/usr/sbin/munin08:06:130
2871699973,21cyclictest16452-21cron08:00:510
2871699972,22cyclictest26456-21cstates11:26:080
28730999654,32cyclictest6646-21kworker/u19:0+nfsiod12:03:152
2873099962,41cyclictest3818-21grep11:41:262
2871699963,30cyclictest6321-21sendmail-msp07:30:520
2871699963,30cyclictest25049-21grep08:26:140
2871699963,24cyclictest31656-21latency_hist10:40:540
2871699963,22cyclictest9779-21ssh10:57:420
2871699962,21cyclictest13658-21/usr/sbin/munin10:11:010
28716999612,21cyclictest9314-21sh09:09:260
2871699953,29cyclictest11637-21unin-run07:45:520
2871699953,29cyclictest11637-21unin-run07:45:520
2871699952,28cyclictest942-21fschecks_time08:51:360
28730999444,9cyclictest0-21swapper/212:26:262
28721999439,7cyclictest0-21swapper/107:21:251
28721999436,9cyclictest0-21swapper/111:20:531
28721999436,9cyclictest0-21swapper/111:20:531
2871699943,26cyclictest328-21grep07:11:140
2871699943,21cyclictest4089-21ssh11:41:590
2871699942,23cyclictest19607-21ssh12:08:500
2740329414,45sleep227221-21/usr/sbin/munin06:56:172
28721999373,14cyclictest28704-21cyclictest07:46:171
28721999341,7cyclictest0-21swapper/108:26:231
2871699934,10cyclictest0-21swapper/008:40:550
2871699933,28cyclictest31232-21/usr/sbin/munin08:46:270
2871699933,26cyclictest18080-21idleruntime-cro08:05:510
2871699933,23cyclictest32149-21/usr/sbin/munin10:41:160
2871699933,20cyclictest26780-21/usr/sbin/munin08:31:170
2871699932,24cyclictest32246-21ssh11:35:560
2871699932,24cyclictest32246-21ssh11:35:560
2871699932,21cyclictest13480-21taskset07:50:590
28721999276,9cyclictest14110-21kworker/u17:1-xprtiod09:17:271
28721999239,8cyclictest0-21swapper/112:21:241
28721999238,8cyclictest0-21swapper/107:01:261
28721999237,8cyclictest0-21swapper/111:06:151
2871699923,30cyclictest352-21runrttasks07:01:230
2871699923,29cyclictest2679-21grep07:16:290
2872199917,37cyclictest22302-21ssh09:31:011
28721999135,8cyclictest0-21swapper/110:30:561
28721999135,8cyclictest0-21swapper/110:30:561
2871699913,29cyclictest19650-21/usr/sbin/munin09:26:140
2871699913,29cyclictest14714-21ssh12:01:040
2871699913,28cyclictest8384-21latency_hist07:35:540
2871699913,21cyclictest10920-21fschecks_count10:06:130
2871699912,31cyclictest29999-21uname08:41:160
2871699912,21cyclictest21270-21taskset08:15:290
2873099902,34cyclictest23800-21find08:21:232
28721999041,13cyclictest16314-21/usr/sbin/munin09:21:271
28721999027,14cyclictest0-21swapper/107:37:451
28721999027,14cyclictest0-21swapper/107:37:451
2871699903,25cyclictest22187-21/usr/sbin/munin08:16:260
2871699902,30cyclictest3706-21cut07:21:160
2871699902,27cyclictest352-21runrttasks07:05:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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