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2026-05-19 - 03:57
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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 00:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2024222012,169sleep12031-21apt-get18:56:031
35029912232,60cyclictest0-21swapper/022:16:230
35029912232,60cyclictest0-21swapper/022:16:230
3502991214,82cyclictest352-21runrttasks23:47:280
3502991202,88cyclictest26320-21runrttasks21:26:150
3502991172,78cyclictest16044-21grep19:36:270
3502991163,82cyclictest23679-21apt-config23:10:560
3502991127,61cyclictest0-21swapper/023:16:070
3502991104,69cyclictest0-21swapper/022:00:530
3502991103,70cyclictest2731-21idleruntime21:41:150
3502991103,67cyclictest20570-21latency_hist00:00:560
3502991097,90cyclictest0-21swapper/000:06:080
3502991093,69cyclictest32693-21/usr/sbin/munin23:26:310
3502991093,67cyclictest26553-21grep22:21:160
3502991093,67cyclictest26553-21grep22:21:160
3502991073,75cyclictest29915-21grep22:26:270
3502991072,74cyclictest20721-21/usr/sbin/munin00:01:270
3502991072,74cyclictest20721-21/usr/sbin/munin00:01:270
3502991072,74cyclictest17924-21/usr/sbin/munin23:01:040
3502991062,78cyclictest8233-21latency_hist21:50:560
35029910523,52cyclictest0-21swapper/022:36:230
35159910484,13cyclictest14007-21latency_hist22:00:552
35029910443,54cyclictest0-21swapper/023:12:180
3502991043,64cyclictest0-21swapper/019:31:120
35029910431,44cyclictest0-21swapper/000:15:550
3502991042,71cyclictest0-21swapper/000:27:360
3502991023,64cyclictest3907-21/usr/sbin/munin23:31:250
35029910140,54cyclictest0-21swapper/022:05:560
3502991005,66cyclictest0-21swapper/021:20:560
3502991003,89cyclictest8831-21cut23:40:550
3502991002,67cyclictest18148-21xargs21:11:510
3515999980,13cyclictest352-21runrttasks20:36:112
3510999941,18cyclictest181rcu_preempt19:06:121
3510999941,18cyclictest181rcu_preempt19:06:121
350299993,64cyclictest11660-21kworker/u17:3+rpciod23:51:330
3502999910,56cyclictest0-21swapper/020:36:200
156242990,6sleep30-21swapper/322:56:283
156242990,6sleep30-21swapper/322:56:283
350299989,53cyclictest0-21swapper/022:07:160
350299983,85cyclictest23960-21apt-get20:01:260
350299983,81cyclictest6379-21tune2fs22:42:000
350299983,81cyclictest6379-21tune2fs22:42:000
350299982,65cyclictest32440-21ssh21:36:230
350299982,64cyclictest1328-21ssh00:22:170
350299982,64cyclictest1328-21ssh00:22:170
350299982,63cyclictest32275-21cut00:20:560
350299974,63cyclictest10912-21ssh23:43:460
3502999722,47cyclictest0-21swapper/022:46:240
3502999722,47cyclictest0-21swapper/022:46:240
3502999637,49cyclictest0-21swapper/019:11:290
3502999637,49cyclictest0-21swapper/019:11:290
350299962,86cyclictest12045-21/usr/sbin/munin21:01:310
3502999620,48cyclictest389-21kworker/u18:1+events_unbound19:15:570
3502999620,48cyclictest389-21kworker/u18:1+events_unbound19:15:570
350299952,63cyclictest9556-21ssh21:51:520
350299952,61cyclictest29323-21basename21:31:160
350299952,61cyclictest29323-21basename21:31:160
350299943,80cyclictest5731-21apt-get19:06:120
350299943,80cyclictest5731-21apt-get19:06:120
350299943,80cyclictest3382-21latency_hist19:00:580
3502999428,48cyclictest0-21swapper/022:51:520
350299942,83cyclictest20632-21fschecks_time22:11:140
3502999414,54cyclictest0-21swapper/019:41:100
350299934,76cyclictest28818-21apt-get20:16:050
3502999336,49cyclictest300-21rs:main0
350299932,60cyclictest30117-21/usr/sbin/munin23:21:150
350299932,60cyclictest30117-21/usr/sbin/munin23:21:150
3515999255,11cyclictest181rcu_preempt21:51:362
350299923,81cyclictest23776-21latency_hist20:00:570
350299923,78cyclictest13950-21ssh21:06:080
350299922,76cyclictest27209-21apt-get20:11:020
350299922,64cyclictest0-21swapper/022:31:290
350299922,64cyclictest0-21swapper/022:31:290
3510999148,13cyclictest23872-21rm00:06:151
350299913,76cyclictest7673-21apt-get20:51:060
351599902,49cyclictest21162-21grep21:16:302
3510999062,21cyclictest12559-21sh22:51:431
350299904,79cyclictest15809-21grep22:56:290
350299904,79cyclictest15809-21grep22:56:290
350299903,78cyclictest18625-21/usr/sbin/munin19:46:310
350299903,78cyclictest18625-21/usr/sbin/munin19:46:310
3502999030,54cyclictest352-21runrttasks19:51:100
3502999030,54cyclictest352-21runrttasks19:51:100
350299893,73cyclictest4689-21grep20:41:150
350299883,61cyclictest23524-21wc21:21:180
3515998767,12cyclictest6133-21runrttasks23:36:072
3515998762,18cyclictest32487-21fschecks_time22:31:142
3515998762,18cyclictest32487-21fschecks_time22:31:142
3510998723,31cyclictest0-21swapper/123:27:021
350299879,71cyclictest0-21swapper/020:50:550
350299879,71cyclictest0-21swapper/020:50:550
350299874,73cyclictest0-21swapper/020:06:080
350299874,73cyclictest0-21swapper/020:06:080
350299872,54cyclictest11710-21seq19:23:180
3515998665,8cyclictest181rcu_preempt20:50:552
3515998665,8cyclictest181rcu_preempt20:50:552
3510998642,8cyclictest181rcu_preempt22:26:091
351099863,60cyclictest18005-21ssh23:01:141
350299863,75cyclictest912-21modprobe20:30:530
350299863,74cyclictest10637-21modprobe21:00:530
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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