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2026-05-19 - 09:03
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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 50 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
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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