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2026-05-14 - 17:49
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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 Thu May 14, 2026 12:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
128109911645,10cyclictest0-21swapper/009:01:430
128109911333,13cyclictest0-21swapper/007:51:320
12810991123,39cyclictest10036-21latency_hist10:31:140
128109911148,10cyclictest9853-21rm09:36:400
128109910938,11cyclictest0-21swapper/012:26:220
128109910938,11cyclictest0-21swapper/012:26:220
128109910937,12cyclictest0-21swapper/007:21:140
128109910834,11cyclictest0-21swapper/008:26:370
12810991074,25cyclictest5259-21expr11:16:270
12810991074,25cyclictest5259-21expr11:16:270
128109910722,14cyclictest0-21swapper/011:37:360
12810991063,39cyclictest6065-21grep08:16:450
128109910629,12cyclictest0-21swapper/010:56:140
128109910541,11cyclictest19676-21snmpd09:26:310
128109910536,7cyclictest0-21swapper/009:16:500
128109910536,7cyclictest0-21swapper/009:16:500
12810991053,45cyclictest32225-21/usr/sbin/munin12:01:340
12810991053,28cyclictest30277-21grep11:56:460
128109910437,8cyclictest0-21swapper/011:31:320
12810991043,38cyclictest352-21runrttasks10:05:390
12810991043,38cyclictest352-21runrttasks10:05:390
128109910377,19cyclictest960-21latency_hist10:16:130
12810991034,36cyclictest19847-21latency10:46:370
12810991033,37cyclictest24836-21latency_hist07:36:140
12810991032,38cyclictest11596-21cut11:26:320
12810991032,38cyclictest11596-21cut11:26:320
12810991017,39cyclictest8330-21apt-get11:21:280
128109910134,9cyclictest181rcu_preempt09:16:110
12810991013,36cyclictest15256-21grep07:06:350
12810991013,36cyclictest15256-21grep07:06:350
12810991013,29cyclictest16884-21latency_hist08:51:130
12810991012,35cyclictest13669-21latency_hist08:41:140
12810991003,31cyclictest26433-21sendmail09:11:110
12810991003,31cyclictest26433-21sendmail09:11:110
128109910030,12cyclictest0-21swapper/007:26:140
1281099998,82cyclictest16414-21apt-get10:41:330
12810999941,12cyclictest352-21runrttasks10:59:580
12810999941,12cyclictest352-21runrttasks10:59:580
1281099993,36cyclictest24124-21latency_hist10:01:140
1281099983,36cyclictest6793-21apt-get08:21:230
1281099982,28cyclictest12197-21/usr/sbin/munin09:41:380
1281099982,28cyclictest12197-21/usr/sbin/munin09:41:380
1281099973,40cyclictest15946-21apt-key10:41:120
12830999669,7cyclictest181rcu_preempt09:54:332
1281099955,40cyclictest27247-21timerwakeupswit11:51:470
1281099953,24cyclictest18429-21/usr/sbin/munin09:52:230
119562959,54sleep212001-21awk06:56:532
12830999475,13cyclictest26989-21sendmail_mailqu11:51:442
12830999473,15cyclictest18041-21apt-key09:51:132
1281099933,36cyclictest2775-21grep08:06:420
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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