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2026-03-26 - 21:33
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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 (updated Thu Mar 26, 2026 12:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31830211810,83sleep00-21swapper/007:00:100
31215211614,62sleep131266-21sort06:59:461
32685991143,26cyclictest4814-21runrttasks11:38:410
326859911315,23cyclictest23306-21sh10:21:120
32685991123,30cyclictest352-21runrttasks10:47:160
32685991113,35cyclictest17428-21kworker/u18:1+rpciod12:15:440
326859910952,50cyclictest1-21systemd09:56:240
326859910952,50cyclictest1-21systemd09:56:240
32685991083,35cyclictest11481-21cpuspeed11:49:420
32685991063,24cyclictest30812-21sh11:27:260
326859910538,59cyclictest30674-21latency_hist10:34:310
32685991044,28cyclictest10113-21grep09:59:550
32685991043,29cyclictest31345-21grep08:34:470
32685991042,26cyclictest20489-21timerandwakeup11:10:030
32685991034,27cyclictest8413-21apt-key09:04:320
32685991032,22cyclictest3496-21ssh12:29:540
32685991032,22cyclictest3496-21ssh12:29:540
32685991024,32cyclictest29654-21fschecks_count12:19:480
32685991024,32cyclictest29654-21fschecks_count12:19:480
32685991024,27cyclictest23046-21/usr/sbin/munin08:09:540
32685991023,29cyclictest28762-21latency_hist11:24:300
32685991013,24cyclictest21639-21ssh12:05:240
32685991012,26cyclictest25393-21/usr/sbin/munin08:15:010
326859910118,24cyclictest23428-21sed11:15:070
3252521017,64sleep232562-21awk07:04:282
32685991009,30cyclictest2138-21cmp07:09:310
32685991009,30cyclictest2138-21cmp07:09:310
326859910051,43cyclictest4041-21kworker/u17:3+rpciod10:09:290
32685991003,30cyclictest23964-21rm09:29:440
32685991003,26cyclictest352-21runrttasks10:11:060
32685991003,25cyclictest352-21runrttasks11:02:120
3268599993,38cyclictest26444-21cat08:19:450
3268599993,33cyclictest4101-21dpkg07:14:280
3268599993,28cyclictest16890-21fschecks_time11:04:480
3268599993,28cyclictest16890-21fschecks_time11:04:480
3268599993,26cyclictest5267-21cstates08:54:430
3268599993,22cyclictest3522-21apt-get09:49:390
3268599992,29cyclictest21434-21/usr/sbin/munin08:05:430
3268599984,34cyclictest29936-21/usr/sbin/munin09:39:500
3268599984,27cyclictest486-21/usr/sbin/munin09:45:060
3268599983,30cyclictest352-21runrttasks09:24:360
3268599983,30cyclictest352-21runrttasks09:24:360
3268599983,24cyclictest4132-21/usr/sbin/munin08:49:590
32696999761,12cyclictest181rcu_preempt08:59:301
3268599974,33cyclictest25672-21timerandwakeup10:25:030
3268599973,33cyclictest31996-21cstates11:29:440
3268599973,31cyclictest352-21runrttasks10:16:200
3268599973,28cyclictest352-21runrttasks07:52:270
3268599972,37cyclictest14256-21/usr/sbin/munin07:44:300
3268599972,37cyclictest14256-21/usr/sbin/munin07:44:300
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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