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2025-07-19 - 00:26
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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
Characteristics of the 50 highest latencies:
System rackcslot2.osadl.org (updated Fri Jul 18, 2025 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1984827959,15sleep10-21swapper/107:02:591
174102690,1sleep00-21swapper/011:33:040
2110126855,8sleep00-21swapper/007:05:270
21499993810,4cyclictest0-21swapper/011:32:390
21499993030,0cyclictest0-21swapper/008:04:230
21499993010,19cyclictest0-21swapper/010:52:190
21500992910,1cyclictest0-21swapper/111:14:551
2150099290,1cyclictest0-21swapper/112:02:081
21499992910,18cyclictest0-21swapper/009:18:480
21500992819,7cyclictest717-21snmpd12:25:211
21500992815,12cyclictest32393-21kworker/1:011:31:431
21499992822,5cyclictest31326-21apache212:36:500
21499992814,8cyclictest18312-21ssh09:26:540
21500992724,3cyclictest0-21swapper/112:35:081
21500992710,6cyclictest0-21swapper/111:37:561
21500992710,13cyclictest0-21swapper/110:31:261
2149999270,26cyclictest0-21swapper/010:06:120
21500992617,9cyclictest31360-21kworker/1:007:37:031
2150099260,1cyclictest0-21swapper/111:03:271
2149999261,22cyclictest2985-21diskmemload11:59:540
21499992610,11cyclictest0-21swapper/010:40:240
21500992518,6cyclictest32682-21ssh10:27:011
21500992512,10cyclictest0-21swapper/109:20:221
21500992510,2cyclictest0-21swapper/111:56:541
21500992510,11cyclictest0-21swapper/107:57:541
2149999254,20cyclictest0-21swapper/010:43:020
21499992523,1cyclictest31347-21apache212:05:370
21499992522,2cyclictest31347-21apache209:34:150
318032240,1sleep131802-21timerandwakeup11:08:031
2150099241,21cyclictest32393-21kworker/1:010:18:211
21500992410,11cyclictest0-21swapper/111:46:031
21500992410,0cyclictest0-21swapper/111:51:391
2150099240,0cyclictest0-21swapper/109:10:531
21499992423,1cyclictest7-21ksoftirqd/012:23:060
21499992410,5cyclictest0-21swapper/011:43:000
2149999240,1cyclictest5320-21kworker/u4:009:52:470
21500992322,1cyclictest31326-21apache210:01:101
21500992317,4cyclictest717-21snmpd07:10:261
2150099231,21cyclictest6224-21/usr/sbin/munin09:52:561
21500992310,10cyclictest0-21swapper/109:31:441
2150099230,2cyclictest0-21swapper/109:27:321
21499992323,0cyclictest0-21swapper/011:26:130
21499992314,8cyclictest0-21swapper/011:22:220
21499992310,5cyclictest0-21swapper/012:17:300
21499992310,0cyclictest0-21swapper/010:28:130
21500992215,3cyclictest31347-21apache210:33:121
21499992210,6cyclictest0-21swapper/011:13:410
2121722210,0sleep10-21swapper/110:53:321
2150099216,9cyclictest0-21swapper/108:32:561
2150099216,8cyclictest0-21swapper/110:38:031
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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