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2026-05-17 - 00:06
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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 Sat May 16, 2026 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
325249913158,8cyclictest0-21swapper/009:16:190
32544991263,89cyclictest20018-21apt-get09:21:372
325379912171,10cyclictest32515-21cyclictest07:06:441
325249911547,16cyclictest7617-21latency_hist09:01:070
325249911547,16cyclictest7617-21latency_hist09:01:070
325249910384,8cyclictest0-21swapper/011:56:490
197421020,9sleep30-21swapper/308:41:393
197421020,9sleep30-21swapper/308:41:393
325379910179,16cyclictest14834-21fschecks_time10:06:251
325379910179,16cyclictest14834-21fschecks_time10:06:251
316302998,63sleep131039-21/usr/sbin/munin06:56:461
316302998,63sleep131039-21/usr/sbin/munin06:56:461
3237529714,51sleep232391-21apt07:01:032
3237529714,51sleep232391-21apt07:01:032
3254499962,37cyclictest21196-21grep11:11:262
3254499962,37cyclictest21196-21grep11:11:262
32537999480,7cyclictest0-21swapper/112:16:411
3254499933,38cyclictest19063-21fschecks_count12:01:242
32537999373,9cyclictest0-21swapper/108:56:211
32537999373,9cyclictest0-21swapper/108:56:211
3254499922,28cyclictest12957-21grep07:36:412
32524999069,15cyclictest11085-21ntpd09:22:380
3254499893,34cyclictest15111-21ssh11:01:182
3254499893,29cyclictest352-21runrttasks08:55:462
32537998948,7cyclictest181rcu_preempt09:39:231
32537998948,7cyclictest181rcu_preempt09:39:231
3254499883,28cyclictest25892-21latency_hist09:31:062
3254499883,28cyclictest25892-21latency_hist09:31:062
3254499873,38cyclictest7533-21switchtime11:41:382
3254499873,37cyclictest30454-21cstates08:31:552
3254499873,37cyclictest18549-21sh12:01:032
3254499873,31cyclictest16077-21cat07:46:402
3254499873,29cyclictest27845-21ssh09:33:392
32537998771,11cyclictest32515-21cyclictest10:06:061
32537998767,14cyclictest18946-21ssh11:06:401
32537998758,7cyclictest181rcu_preempt07:46:261
32524998760,16cyclictest29815-21apt-key11:26:040
3254499869,43cyclictest27084-21apt-get11:21:202
3254499863,38cyclictest2423-21ssh10:40:202
3254499863,37cyclictest20503-21/usr/sbin/munin10:16:192
3254499863,34cyclictest31979-21/usr/sbin/munin09:41:392
3254499863,30cyclictest30090-21sh09:36:422
3254499863,30cyclictest30090-21sh09:36:422
3254499862,54cyclictest12291-21ssh10:56:262
3254499862,54cyclictest12291-21ssh10:56:262
3254499862,33cyclictest352-21runrttasks09:49:462
3254499862,33cyclictest352-21runrttasks09:49:462
32524998651,27cyclictest0-21swapper/009:11:210
32524998651,27cyclictest0-21swapper/009:11:210
3254499856,66cyclictest7917-21taskset09:01:272
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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