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2026-04-29 - 17:31
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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 Wed Apr 29, 2026 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27536216613,106sleep027569-21proc_pri06:57:540
28371215112,105sleep128375-21latency_hist07:02:151
28454991273,78cyclictest0-21swapper/009:32:270
28454991272,78cyclictest27734-21apt-get08:37:220
28454991253,83cyclictest1319-21rm09:52:290
28454991253,83cyclictest1319-21rm09:52:290
284549911625,52cyclictest0-21swapper/011:07:140
284549911534,60cyclictest0-21swapper/011:12:440
284549911534,60cyclictest0-21swapper/011:12:440
28454991143,68cyclictest0-21swapper/008:37:130
28454991143,68cyclictest0-21swapper/008:37:130
28454991142,71cyclictest2952-1kworker/0:0H+mmc_complete09:32:150
284549911417,76cyclictest0-21swapper/012:07:450
28454991133,77cyclictest7148-21modprobe11:52:110
2824721136,16sleep20-21swapper/207:01:312
28454991118,62cyclictest0-21swapper/008:02:130
28454991118,62cyclictest0-21swapper/008:02:130
28454991113,62cyclictest0-21swapper/007:52:220
284549911132,64cyclictest0-21swapper/007:32:140
284549911116,71cyclictest25224-21switchtime08:27:450
284549911116,71cyclictest25224-21switchtime08:27:450
28454991086,93cyclictest29586-21apt-get08:43:100
28454991084,74cyclictest4204-21munin-run11:47:100
28454991083,98cyclictest13297-21apt-get11:07:230
28454991083,98cyclictest13297-21apt-get11:07:230
28454991076,85cyclictest21664-21grep10:27:140
28454991076,85cyclictest21664-21grep10:27:140
28454991073,66cyclictest32530-21idleruntime-cro08:52:120
28454991073,66cyclictest32530-21idleruntime-cro08:52:120
28454991073,64cyclictest0-21swapper/008:17:130
28454991072,70cyclictest4990-21ntp_kernel_err10:52:380
284549910720,49cyclictest0-21swapper/012:27:380
284549910720,49cyclictest0-21swapper/012:27:380
284709910672,10cyclictest181rcu_preempt11:42:062
28454991063,80cyclictest6785-21apt-get07:32:300
28454991063,66cyclictest6909-21apt-get09:07:290
284549910636,63cyclictest0-21swapper/012:07:110
284549910636,63cyclictest0-21swapper/012:07:110
28454991062,64cyclictest17755-21modprobe08:07:110
28454991062,64cyclictest17755-21modprobe08:07:110
28454991053,58cyclictest0-21swapper/009:05:230
284549910531,47cyclictest0-21swapper/010:02:490
284549910531,47cyclictest0-21swapper/010:02:490
28454991033,93cyclictest0-21swapper/012:22:230
28454991033,64cyclictest16851-21ssh10:17:470
28454991033,64cyclictest0-21swapper/011:37:160
28454991033,58cyclictest27510-21latency_hist09:42:140
284549910249,47cyclictest3312-21diskmemload10:47:450
284549910249,47cyclictest3312-21diskmemload10:47:450
28454991024,61cyclictest0-21swapper/007:17:120
28454991023,60cyclictest18401-21ssh09:27:090
28454991022,63cyclictest21485-21chrt11:21:070
284549910210,59cyclictest7817-21grep11:52:330
284549910136,57cyclictest0-21swapper/011:27:470
284549910136,57cyclictest0-21swapper/011:27:470
28454991013,60cyclictest0-21swapper/007:17:460
28454991013,60cyclictest0-21swapper/007:17:460
28454991012,62cyclictest30741-21latency_hist11:37:130
28454991003,66cyclictest25331-21/usr/sbin/munin10:32:380
28454991003,66cyclictest25331-21/usr/sbin/munin10:32:380
2845499994,61cyclictest30239-21forks07:07:170
2845499993,79cyclictest0-21swapper/009:47:280
2845499993,59cyclictest10018-21cron11:02:110
2845499993,59cyclictest10018-21cron11:02:110
28454999933,60cyclictest0-21swapper/007:22:350
2845499992,68cyclictest22159-21/usr/sbin/munin11:22:370
2845499992,59cyclictest10997-21ntpq11:57:390
28454999843,49cyclictest277-21dbus-daemon08:12:120
2845499983,61cyclictest0-21swapper/009:12:360
2845499982,58cyclictest13690-21grep09:17:490
2845499982,58cyclictest13690-21grep09:17:490
28470999774,16cyclictest28441-21cyclictest11:22:272
28454999735,56cyclictest0-21swapper/009:57:480
2845499972,65cyclictest28321-21uname09:42:420
2845499972,63cyclictest15814-21ls10:17:150
2845499963,56cyclictest0-21swapper/010:42:250
151362950,8sleep20-21swapper/212:04:412
151362950,8sleep20-21swapper/212:04:412
2845499949,52cyclictest0-21swapper/012:17:130
2845499944,56cyclictest0-21swapper/010:10:370
2845499943,84cyclictest22074-21fschecks_count10:27:320
2845499942,64cyclictest22038-21xargs08:17:460
2845499942,60cyclictest10657-21runrttasks07:42:440
28463999368,17cyclictest277-21dbus-daemon09:17:131
2845499933,54cyclictest0-21swapper/010:37:270
28470999269,9cyclictest181rcu_preempt12:25:222
2845499923,81cyclictest1965-21apt-get08:57:240
28470999159,11cyclictest181rcu_preempt10:05:232
28470999159,11cyclictest181rcu_preempt10:05:232
2845499913,58cyclictest24230-21sh08:27:110
28470999056,9cyclictest181rcu_preempt10:27:292
28470998956,14cyclictest181rcu_preempt09:56:002
28470998956,14cyclictest181rcu_preempt09:56:002
28470998941,11cyclictest181rcu_preempt09:50:002
2845499892,54cyclictest22289-21ssh12:17:280
28454998910,57cyclictest0-21swapper/008:56:450
28454998826,53cyclictest0-21swapper/007:39:260
2845499872,69cyclictest29885-21kworker/u17:1+ext4-rsv-conversion07:52:150
28463998644,29cyclictest31487-21diskstats10:43:301
28470998562,11cyclictest0-21swapper/209:17:482
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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