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2026-04-21 - 15:21
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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 100 highest latencies:
System rackcslot2.osadl.org (updated Tue Apr 21, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
248521000,0sleep00-21swapper/011:01:250
3276527058,8sleep00-21swapper/007:06:190
3265626956,8sleep10-21swapper/107:05:111
809993129,1cyclictest0-21swapper/111:23:251
80999290,1cyclictest8927-21expr09:44:251
80999280,1cyclictest0-21swapper/112:17:451
80899280,27cyclictest0-21swapper/011:12:100
809992710,11cyclictest0-21swapper/108:14:061
808992710,7cyclictest0-21swapper/010:41:270
80999264,1cyclictest18781-21/usr/sbin/munin09:14:271
809992610,0cyclictest0-21swapper/109:02:061
80899260,25cyclictest0-21swapper/009:15:000
80999255,19cyclictest0-21swapper/111:24:371
809992525,0cyclictest0-21swapper/109:13:311
809992516,5cyclictest628-21ssh10:16:381
809992516,5cyclictest590-21rs:main1
80999250,20cyclictest0-21swapper/110:49:021
808992511,5cyclictest0-21swapper/009:21:280
80899246,13cyclictest0-21swapper/008:09:120
80899245,8cyclictest0-21swapper/011:49:280
80899245,18cyclictest0-21swapper/010:03:250
808992422,1cyclictest16292-21ssh10:37:340
808992410,8cyclictest0-21swapper/009:56:350
808992410,6cyclictest0-21swapper/007:39:200
59222422,1sleep10-21swapper/107:09:071
80999234,8cyclictest14760-21diskmemload10:39:261
809992322,1cyclictest802-21apache211:09:541
809992310,6cyclictest0-21swapper/112:00:491
80899231,15cyclictest0-21swapper/010:58:390
808992310,2cyclictest0-21swapper/012:35:200
808992310,1cyclictest0-21swapper/009:31:180
80899230,8cyclictest0-21swapper/009:39:180
809992221,1cyclictest12729-21/usr/sbin/munin07:39:291
809992221,1cyclictest10715-21apache210:27:311
809992220,1cyclictest11215-21kworker/u4:010:10:261
809992220,1cyclictest1016-21perl09:34:201
809992219,3cyclictest1085-21apache207:26:371
809992210,6cyclictest0-21swapper/112:09:171
809992210,3cyclictest0-21swapper/111:18:451
80999220,4cyclictest0-21swapper/111:46:031
80999220,10cyclictest0-21swapper/110:54:201
80899223,6cyclictest0-21swapper/011:56:240
80899222,5cyclictest0-21swapper/009:13:200
80899221,13cyclictest0-21swapper/012:24:280
808992210,6cyclictest0-21swapper/009:27:410
808992210,6cyclictest0-21swapper/007:24:180
808992210,5cyclictest0-21swapper/010:11:030
80999214,5cyclictest0-21swapper/112:29:281
809992120,1cyclictest10741-21apache208:52:021
809992116,4cyclictest636-21nscd11:07:481
809992113,3cyclictest24-21ksoftirqd/110:34:291
809992110,4cyclictest0-21swapper/109:19:181
80999210,16cyclictest0-21swapper/112:25:501
80899215,12cyclictest0-21swapper/007:34:230
80899214,11cyclictest0-21swapper/012:14:240
808992114,3cyclictest14760-21diskmemload10:49:180
808992110,5cyclictest0-21swapper/012:04:180
808992110,5cyclictest0-21swapper/011:25:370
808992110,4cyclictest0-21swapper/012:19:160
808992110,3cyclictest0-21swapper/010:21:320
808992110,1cyclictest0-21swapper/012:02:260
2333722110,0sleep10-21swapper/110:04:201
80999204,7cyclictest4976-21df07:19:191
80999204,3cyclictest0-21swapper/110:20:551
809992020,0cyclictest10715-21apache211:56:171
809992010,6cyclictest0-21swapper/110:02:131
809992010,5cyclictest0-21swapper/111:49:171
809992010,5cyclictest0-21swapper/109:24:181
809992010,3cyclictest0-21swapper/107:44:251
80999200,9cyclictest0-21swapper/111:34:241
80999200,1cyclictest0-21swapper/111:39:201
808992017,3cyclictest10715-21apache209:51:440
808992016,3cyclictest10741-21apache210:17:250
808992014,4cyclictest31561-1kworker/u5:011:17:180
808992010,5cyclictest0-21swapper/009:44:180
808992010,3cyclictest0-21swapper/008:19:170
80999193,8cyclictest0-21swapper/108:39:181
80999192,9cyclictest0-21swapper/108:54:211
809991911,4cyclictest100250irq/107-eth1-rx10:59:121
809991910,4cyclictest0-21swapper/108:19:191
809991910,3cyclictest0-21swapper/107:34:221
80999190,15cyclictest14760-21diskmemload12:05:071
80999190,10cyclictest28916-21memory12:19:231
80899195,7cyclictest0-21swapper/009:04:170
80899195,6cyclictest1289-21idleruntime-cro08:34:070
80899195,10cyclictest0-21swapper/011:29:190
80899195,10cyclictest0-21swapper/008:59:180
80899194,10cyclictest0-21swapper/008:04:260
80899194,10cyclictest0-21swapper/007:29:180
808991917,2cyclictest10715-21apache210:04:280
808991915,2cyclictest0-21swapper/007:45:530
808991910,5cyclictest0-21swapper/011:19:180
808991910,5cyclictest0-21swapper/010:30:530
808991910,5cyclictest0-21swapper/008:17:420
808991910,5cyclictest0-21swapper/007:09:180
808991910,3cyclictest0-21swapper/010:44:280
808991910,3cyclictest0-21swapper/008:34:190
809991817,1cyclictest10715-21apache208:47:571
809991812,2cyclictest0-21swapper/109:54:251
80999181,11cyclictest0-21swapper/107:14:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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