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2026-05-21 - 18:41
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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 376 highest latencies:
System rackcslot2.osadl.org (updated Thu May 21, 2026 12:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1027927756,16sleep00-21swapper/007:04:130
955826755,8sleep10-21swapper/107:03:551
11500994010,29cyclictest0-21swapper/109:03:421
11500993416,18cyclictest0-21swapper/109:36:121
11500993027,2cyclictest0-21swapper/109:54:031
1150099301,24cyclictest0-21swapper/110:30:191
11500992929,0cyclictest0-21swapper/107:59:011
11499992929,0cyclictest0-21swapper/011:19:260
11499992929,0cyclictest0-21swapper/010:02:580
1150099270,20cyclictest0-21swapper/110:08:201
1149999263,9cyclictest26769-21ntp_kernel_pll_10:34:110
11500992520,4cyclictest18780-21ssh11:06:161
11499992525,0cyclictest0-21swapper/012:15:350
11499992525,0cyclictest0-21swapper/008:58:240
11499992511,5cyclictest100250irq/107-eth1-rx09:42:320
11499992510,4cyclictest100150irq/106-eth1-rx10:21:510
1149999250,6cyclictest11811-21ssh09:32:350
11500992423,0cyclictest31730-21kworker/u4:212:19:241
11500992422,1cyclictest231ktimersoftd/110:52:521
11500992422,1cyclictest231ktimersoftd/110:52:521
1150099242,21cyclictest0-21swapper/108:49:051
11500992410,6cyclictest0-21swapper/111:49:041
11500992410,5cyclictest0-21swapper/111:29:031
1150099240,22cyclictest29137-21idleruntime-cro12:03:531
11499992410,13cyclictest0-21swapper/009:07:360
1150099237,9cyclictest0-21swapper/110:59:081
11500992322,1cyclictest21397-21apache212:35:211
11500992321,1cyclictest479-21ssh12:08:501
11500992319,1cyclictest21397-21apache207:45:461
11500992315,3cyclictest231ktimersoftd/111:16:261
11500992310,6cyclictest0-21swapper/109:12:141
1149999234,12cyclictest0-21swapper/010:29:120
11499992310,9cyclictest0-21swapper/010:46:200
1150099224,8cyclictest0-21swapper/110:19:061
1150099223,2cyclictest20233-21/usr/sbin/munin11:09:131
11500992216,3cyclictest0-21swapper/109:17:531
11500992215,2cyclictest0-21swapper/111:44:071
11500992210,5cyclictest0-21swapper/110:28:151
1149999225,11cyclictest0-21swapper/007:44:130
11499992222,0cyclictest0-21swapper/009:56:250
11499992221,1cyclictest81ktimersoftd/011:34:110
11499992221,1cyclictest21397-21apache212:35:170
11499992218,2cyclictest0-21swapper/007:54:060
11499992215,4cyclictest81ktimersoftd/010:49:100
11499992215,4cyclictest81ktimersoftd/010:49:100
11499992215,4cyclictest21373-21apache209:16:330
11499992210,5cyclictest0-21swapper/011:24:050
1149999220,13cyclictest0-21swapper/008:09:040
994722110,1sleep10-21swapper/108:28:231
1150099218,12cyclictest0-21swapper/107:54:051
1150099216,6cyclictest0-21swapper/107:24:041
11500992118,2cyclictest21397-21apache212:31:331
1150099210,3cyclictest0-21swapper/110:38:131
1149999214,16cyclictest0-21swapper/007:33:520
1149999212,19cyclictest0-21swapper/011:39:290
11499992117,3cyclictest744-21snmpd08:29:590
11499992115,5cyclictest21373-21apache212:09:130
1149999211,19cyclictest0-21swapper/010:10:140
11499992110,7cyclictest0-21swapper/011:44:580
11499992110,6cyclictest26681-21kworker/u4:111:31:510
11499992110,5cyclictest0-21swapper/008:34:040
11499992110,4cyclictest0-21swapper/011:14:060
11499992110,3cyclictest0-21swapper/012:29:050
1999122010,0sleep00-21swapper/011:50:400
1150099206,8cyclictest0-21swapper/108:44:051
11500992018,1cyclictest599-21avahi-daemon07:23:401
11500992018,1cyclictest0-21swapper/111:35:051
11500992016,3cyclictest802-21apache211:38:581
11500992015,4cyclictest21373-21apache209:28:541
11500992010,3cyclictest0-21swapper/112:17:221
11500992010,2cyclictest0-21swapper/108:29:061
11500992010,0cyclictest0-21swapper/109:42:061
1150099200,9cyclictest0-21swapper/108:19:041
1149999209,9cyclictest21389-21apache208:19:030
1149999204,8cyclictest0-21swapper/011:59:120
1149999204,10cyclictest0-21swapper/011:54:040
11499992018,1cyclictest802-21apache211:00:040
11499992015,2cyclictest21373-21apache212:23:310
11499992011,8cyclictest100150irq/106-eth1-rx09:09:390
11499992010,5cyclictest0-21swapper/010:08:070
11499992010,4cyclictest0-21swapper/008:58:570
1992321910,0sleep00-21swapper/010:24:520
1150099195,8cyclictest0-21swapper/108:58:031
1150099193,9cyclictest4412-21apache_accesses08:14:051
1150099193,12cyclictest0-21swapper/107:29:091
11500991919,0cyclictest0-21swapper/107:38:511
11500991918,1cyclictest0-21swapper/110:10:441
11500991913,3cyclictest3869-21kworker/u4:010:42:381
11500991912,5cyclictest100250irq/107-eth1-rx09:46:021
11500991912,2cyclictest11048-21ssh10:14:081
11500991910,9cyclictest0-21swapper/112:24:151
11500991910,7cyclictest21373-21apache212:12:211
11500991910,6cyclictest0-21swapper/110:56:111
1150099190,15cyclictest3133-21/usr/sbin/munin08:09:091
1149999199,3cyclictest0-21swapper/008:24:120
1149999196,7cyclictest0-21swapper/007:59:110
11499991917,1cyclictest20176-21apache207:16:220
11499991912,4cyclictest100150irq/106-eth1-rx12:26:110
1149999191,12cyclictest19602-21munin-run08:53:530
11499991910,5cyclictest100250irq/107-eth1-rx09:43:590
11499991910,5cyclictest0-21swapper/009:34:060
11499991910,4cyclictest0-21swapper/009:24:040
1149999190,10cyclictest30502-21ssh12:04:120
1150099184,6cyclictest28227-21python07:49:121
1150099183,6cyclictest0-21swapper/111:54:261
1150099182,5cyclictest0-21swapper/107:39:131
1150099181,5cyclictest3366-21kworker/u4:110:46:241
11500991814,2cyclictest21397-21apache209:50:411
11500991811,2cyclictest0-21swapper/109:24:141
11500991811,0cyclictest1212-21ls08:04:091
11500991810,7cyclictest0-21swapper/111:22:221
11500991810,4cyclictest0-21swapper/111:24:081
11500991810,4cyclictest0-21swapper/108:39:141
11500991810,3cyclictest0-21swapper/109:59:071
1149999184,6cyclictest11477-21ntp_states10:14:120
1149999183,9cyclictest30880-21/usr/sbin/munin10:39:100
1149999181,12cyclictest0-21swapper/011:08:360
11499991810,5cyclictest0-21swapper/011:12:390
11499991810,2cyclictest0-21swapper/007:49:040
1149999180,14cyclictest0-21swapper/007:21:250
1150099174,9cyclictest0-21swapper/109:04:141
11500991710,6cyclictest0-21swapper/108:38:101
1150099170,5cyclictest21395-21apache209:19:041
1149999172,8cyclictest0-21swapper/007:24:090
1149999172,11cyclictest0-21swapper/009:19:020
11499991710,4cyclictest0-21swapper/010:54:120
11499991710,2cyclictest0-21swapper/008:16:340
1149999163,11cyclictest0-21swapper/009:49:150
11499991616,0cyclictest0-21swapper/007:35:230
11499991610,2cyclictest0-21swapper/008:44:140
11499991610,2cyclictest0-21swapper/008:39:050
1150099152,9cyclictest0-21swapper/107:09:081
1150099150,10cyclictest0-21swapper/107:15:391
1149999152,5cyclictest11520-21apache_processe07:09:040
11499991510,2cyclictest0-21swapper/008:04:050
1149999145,4cyclictest23736-21hddtemp_smartct07:39:060
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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