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2026-01-11 - 19:38
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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 Sun Jan 11, 2026 12:44:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
305959912768,53cyclictest8886-21cstates11:54:540
29269212313,79sleep129275-21/usr/sbin/munin07:04:471
29269212313,79sleep129275-21/usr/sbin/munin07:04:471
2733821200,5sleep00-21swapper/011:31:110
30595991182,29cyclictest21632-21seq12:16:580
30595991063,31cyclictest31143-21ssh10:44:430
30595991063,31cyclictest31143-21ssh10:44:430
30595991063,27cyclictest5949-21cstates09:09:380
30612991052,30cyclictest16021-21rm11:13:192
30595991032,21cyclictest28763-21seq11:34:270
30595991032,21cyclictest28763-21seq11:34:270
305959910241,55cyclictest0-21swapper/009:59:210
305959910241,55cyclictest0-21swapper/009:59:210
30595991023,30cyclictest352-21runrttasks07:58:470
30595991023,27cyclictest14397-21cron12:04:210
30595991023,27cyclictest14397-21cron12:04:210
305959910185,10cyclictest13244-21modprobe07:54:210
305959910185,10cyclictest13244-21modprobe07:54:210
30595991013,26cyclictest544-21cron11:19:200
30595991013,13cyclictest21776-21apt-get10:29:340
305959910039,53cyclictest28482-21apt-key08:39:260
30595991003,22cyclictest18460-21/usr/sbin/munin09:29:480
30595991002,27cyclictest31672-21ssh09:51:280
30595991002,22cyclictest28350-21/usr/sbin/munin10:39:480
3059599999,80cyclictest8817-21cpu07:40:350
3059599999,80cyclictest8817-21cpu07:40:350
3059599993,32cyclictest2769-21timerandwakeup07:19:560
3059599993,32cyclictest2769-21timerandwakeup07:19:560
3059599992,24cyclictest14132-21sed11:09:470
30595999917,24cyclictest58-21kcompactd010:28:450
30595999917,24cyclictest58-21kcompactd010:28:450
3043029912,48sleep030454-21munin-run07:09:220
3043029912,48sleep030454-21munin-run07:09:220
3059599984,32cyclictest12697-21/usr/sbin/munin10:14:570
3059599984,32cyclictest12697-21/usr/sbin/munin10:14:570
3059599984,27cyclictest352-21runrttasks08:07:260
3059599983,30cyclictest2187-21modprobe12:39:200
30595999817,24cyclictest10850-21rm09:17:260
3061299973,26cyclictest9432-21sh11:01:462
30612999728,37cyclictest0-21swapper/212:05:582
30612999728,37cyclictest0-21swapper/212:05:582
3061299972,27cyclictest352-21runrttasks10:10:332
3059599973,33cyclictest31811-21latency_hist12:34:240
3059599973,33cyclictest31811-21latency_hist12:34:240
3059599973,32cyclictest325-21/usr/sbin/munin07:15:010
3059599973,24cyclictest31831-21acpi11:39:310
3059599972,32cyclictest20983-21ssh09:34:360
30612999651,35cyclictest0-21swapper/208:04:242
30612999644,10cyclictest181rcu_preempt11:54:262
30612999644,10cyclictest181rcu_preempt11:54:262
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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