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2026-05-06 - 20:21
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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 Wed May 06, 2026 12:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2673821439,99sleep126829-21timerwakeupswit06:57:291
2673821439,99sleep126829-21timerwakeupswit06:57:291
274119911961,51cyclictest0-21swapper/012:02:100
27411991053,27cyclictest0-21swapper/009:01:560
2592721057,71sleep30-21swapper/306:56:543
2592721057,71sleep30-21swapper/306:56:543
27411991047,17cyclictest27412-21latency_hist07:01:470
27411991047,17cyclictest27412-21latency_hist07:01:470
274209910359,32cyclictest0-21swapper/209:37:172
274119910327,9cyclictest15350irq/295-2188000.ethernet08:46:540
274119910327,9cyclictest15350irq/295-2188000.ethernet08:46:540
274119910247,48cyclictest27402-21cyclictest08:16:470
274119910247,48cyclictest27402-21cyclictest08:16:470
27411991022,41cyclictest17001-21taskset12:07:320
274119910148,45cyclictest0-21swapper/009:12:150
274209910056,37cyclictest11753-21ntp_kernel_pll_09:17:112
274209910056,37cyclictest11753-21ntp_kernel_pll_09:17:112
27411991003,25cyclictest32523-21/usr/sbin/munin09:52:060
27411991003,25cyclictest32523-21/usr/sbin/munin09:52:060
27411991003,22cyclictest30505-21sh11:36:530
27411991002,37cyclictest1001-21apt-get11:41:530
27411991002,37cyclictest1001-21apt-get11:41:530
27420999974,9cyclictest181rcu_preempt11:42:012
27420999974,9cyclictest181rcu_preempt11:42:012
27411999941,49cyclictest0-21swapper/012:26:440
27411999941,49cyclictest0-21swapper/012:26:440
2741199992,41cyclictest464-21cat10:46:590
27411999847,45cyclictest0-21swapper/008:46:460
2741199982,26cyclictest15855-21fschecks_time11:12:040
2741199982,26cyclictest15855-21fschecks_time11:12:040
27420999752,38cyclictest0-21swapper/212:07:172
27411999751,21cyclictest181rcu_preempt10:37:120
2741199973,41cyclictest3656-21taskset10:51:590
27411999732,58cyclictest0-21swapper/012:27:190
2741199973,21cyclictest1923-21latency_hist09:01:450
27411999647,43cyclictest1865-21diskmemload09:21:540
27411999639,52cyclictest0-21swapper/011:36:430
2741199962,23cyclictest352-21runrttasks12:18:430
2741199954,25cyclictest24872-21/usr/sbin/munin08:32:080
2741199953,22cyclictest10146-21fschecks_count11:57:040
2741199952,31cyclictest9765-21latency_hist11:56:450
27411999519,7cyclictest0-21swapper/010:02:040
104782950,6sleep00-21swapper/010:09:190
27415999469,16cyclictest19676-21snmpd10:37:201
2741199943,39cyclictest23102-21/usr/sbin/munin09:37:170
27411999428,59cyclictest0-21swapper/011:02:090
2741199942,38cyclictest20853-21apt-get10:26:540
2741199942,28cyclictest20115-21apt-get08:17:450
2741199942,28cyclictest20115-21apt-get08:17:450
2741199942,21cyclictest12502-21switchtime10:12:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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