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2026-05-14 - 16:40
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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 100 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
1281099933,36cyclictest2775-21grep08:06:420
12830999270,16cyclictest11958-21fschecks_count12:21:302
1282099923,55cyclictest31-21ksoftirqd/109:35:061
12810999257,24cyclictest5382-21latency_hist08:16:140
125782926,16sleep10-21swapper/107:00:101
12820999170,14cyclictest30591-21sh11:57:261
12830999073,10cyclictest0-21swapper/211:11:112
12830999056,11cyclictest181rcu_preempt10:57:242
12830999056,11cyclictest181rcu_preempt10:57:242
1131329024,38sleep30-21swapper/306:56:213
12830998975,10cyclictest12797-21cyclictest07:21:132
12830998967,15cyclictest4958-21latency_hist11:16:142
12830998965,17cyclictest2209-21ssh10:16:482
12830998957,9cyclictest181rcu_preempt10:46:572
12830998953,10cyclictest181rcu_preempt08:31:222
1283099872,47cyclictest39-21ksoftirqd/211:43:082
1283099872,47cyclictest39-21ksoftirqd/211:43:082
12810998755,20cyclictest18788-21latency_hist08:56:140
12810998755,20cyclictest18788-21latency_hist08:56:140
12830998639,12cyclictest181rcu_preempt12:10:002
1283099862,37cyclictest39-21ksoftirqd/211:33:022
1282099863,74cyclictest16414-21apt-get10:41:261
12830998552,7cyclictest181rcu_preempt09:24:392
12830998440,12cyclictest181rcu_preempt09:31:042
12820998464,14cyclictest7293-21apt-get08:21:441
12820998463,15cyclictest23734-21acpi09:06:211
12820998463,15cyclictest23734-21acpi09:06:211
12820998456,20cyclictest20188-21modprobe09:01:101
12820998456,20cyclictest20188-21modprobe09:01:101
12820998444,29cyclictest14898-21modprobe09:46:111
12820998444,29cyclictest14898-21modprobe09:46:111
12830998340,15cyclictest181rcu_preempt10:55:202
12830998334,14cyclictest0-21swapper/209:56:282
1282099835,48cyclictest31-21ksoftirqd/108:41:071
1282099832,49cyclictest31-21ksoftirqd/110:54:571
12820998318,40cyclictest31-21ksoftirqd/107:14:031
1283099829,38cyclictest39-21ksoftirqd/211:21:282
12830998238,13cyclictest181rcu_preempt10:27:512
12830998233,12cyclictest181rcu_preempt09:44:062
12830998233,12cyclictest181rcu_preempt09:44:062
12830998230,13cyclictest181rcu_preempt12:28:482
12830998230,13cyclictest181rcu_preempt12:28:482
12820998266,10cyclictest17950-21apt-key09:51:111
1281099824,35cyclictest24241-21timerwakeupswit11:46:470
12830998159,8cyclictest181rcu_preempt10:38:402
12830998148,11cyclictest181rcu_preempt07:56:292
12830998145,15cyclictest181rcu_preempt11:20:362
12830998145,15cyclictest181rcu_preempt11:20:362
12820998166,11cyclictest12797-21cyclictest12:01:481
12810998155,17cyclictest18148-21latency_hist09:51:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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