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2025-11-23 - 04:32
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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 Nov 23, 2025 00:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
315769911840,14cyclictest0-21swapper/022:09:560
315769911840,14cyclictest0-21swapper/022:09:560
315769911648,62cyclictest16747-21kworker/u17:0+xprtiod22:24:320
315769911140,10cyclictest0-21swapper/023:59:580
315769911140,10cyclictest0-21swapper/023:59:580
31576991104,46cyclictest28884-21unixbench_singl21:44:580
315769910936,11cyclictest0-21swapper/020:04:430
31576991063,35cyclictest25542-21latency_hist00:24:210
31576991062,31cyclictest2598-21/usr/sbin/munin22:49:490
31576991062,31cyclictest2598-21/usr/sbin/munin22:49:490
31576991043,39cyclictest355-21runrttasks19:44:450
315769910218,30cyclictest355-21runrttasks23:57:370
3157699993,29cyclictest957-21mailstats20:49:530
3143229515,54sleep031446-21modprobe19:09:190
31598999327,8cyclictest181rcu_preempt19:48:462
31598999271,14cyclictest32653-21latency_hist20:49:222
3011829213,41sleep10-21swapper/119:04:351
31588999138,47cyclictest0-21swapper/123:14:221
31588999138,47cyclictest0-21swapper/123:14:221
31588999044,38cyclictest0-21swapper/122:19:231
31598998973,10cyclictest14634-21latency_hist19:54:232
3158899892,43cyclictest19540-21apt-get22:24:321
3046728913,46sleep30-21swapper/319:04:543
3158899883,30cyclictest6975-21taskset19:29:441
3158899883,30cyclictest29705-21tail00:29:591
3158899882,34cyclictest11271-21/usr/sbin/munin23:04:411
3158899882,29cyclictest10453-21ssh21:14:521
31588998766,14cyclictest3240-21runrttasks19:19:341
31588998766,14cyclictest3240-21runrttasks19:19:341
3158899873,37cyclictest19814-21modprobe23:19:191
3158899873,28cyclictest28136-21cron22:39:191
3158899873,28cyclictest2012-21/usr/sbin/munin22:49:581
3158899873,28cyclictest2012-21/usr/sbin/munin22:49:581
31598998562,17cyclictest5407-21fschecks_time21:04:422
31588998534,45cyclictest18274-21sh00:10:081
31588998534,45cyclictest18274-21sh00:10:081
31588998534,43cyclictest0-21swapper/120:14:441
3158899853,29cyclictest2267-21grep19:14:581
3158899853,28cyclictest6467-21ssh22:56:031
3158899852,28cyclictest4165-21cat21:59:211
31576998560,19cyclictest32613-21latency_hist20:49:220
3159899842,36cyclictest39-21ksoftirqd/220:34:352
3158899843,30cyclictest4327-21/usr/sbin/munin21:59:401
3158899843,29cyclictest17750-21sh21:27:161
3158899843,28cyclictest30028-21latency20:40:371
3158899843,28cyclictest18514-21ntpq20:04:491
3158899842,28cyclictest860-21latency_hist19:14:231
31588998420,26cyclictest12962-21sh00:01:241
31588998420,26cyclictest12962-21sh00:01:241
31588998414,29cyclictest22148-21basename21:34:461
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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