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2026-03-28 - 17:00
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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 Sat Mar 28, 2026 12:44:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31925218814,62sleep031928-21cron07:04:190
31265212613,78sleep219676-21snmpd07:00:012
320949911660,18cyclictest32078-21cyclictest11:59:421
320949911660,18cyclictest32078-21cyclictest11:59:421
320879911453,25cyclictest24063-21ntp_kernel_pll_12:14:490
32102991132,87cyclictest29232-21ssh11:29:372
32102991002,71cyclictest22272-21apt-get09:29:482
32087999472,15cyclictest1398-21munin-node11:16:040
32102999175,10cyclictest10612-21modprobe10:59:182
32102999067,17cyclictest6371-21sh11:44:512
3208799896,68cyclictest29295-21ssh11:29:490
32094998864,16cyclictest2572-21latency_hist11:39:231
32094998855,10cyclictest181rcu_preempt11:09:321
32087998742,19cyclictest13104-21sh09:14:320
3209499863,44cyclictest31-21ksoftirqd/109:24:351
32087998658,20cyclictest20360-21latency_hist12:09:220
3208799864,43cyclictest5497-21awk09:54:530
32094998456,19cyclictest14606-21apt-key07:49:231
32094998410,42cyclictest29189-21apt-get11:29:371
32087998457,20cyclictest32078-21cyclictest11:24:360
32087998457,18cyclictest2952-21systemd-journal10:28:300
32102998368,11cyclictest32078-21cyclictest08:49:422
32102998359,18cyclictest21902-21latency_hist09:29:222
32094998348,12cyclictest181rcu_preempt07:29:501
32087998337,33cyclictest21177-21modprobe08:09:190
317812839,50sleep131783-21sshd07:02:251
32087998256,17cyclictest14316-21latency_hist11:59:210
32087998253,22cyclictest17164-21sh09:19:550
32087998253,22cyclictest17164-21sh09:19:550
32094998153,10cyclictest17202-21ssh10:14:491
32094998131,28cyclictest13645-21ntp_kernel_err09:14:481
32087998154,19cyclictest1753-21latency_hist10:44:210
32094998065,9cyclictest58-21kcompactd009:47:141
32094998063,11cyclictest29570-21unixbench_multi10:34:581
32094998063,11cyclictest29570-21unixbench_multi10:34:581
32094998051,9cyclictest181rcu_preempt08:44:361
32087998063,10cyclictest16773-21kworker/u17:1+xprtiod09:24:460
32087998060,11cyclictest352-21runrttasks10:54:310
32087998056,14cyclictest17763-21diskmemload11:09:590
32094997954,17cyclictest23260-21fschecks_count11:19:411
32094997954,17cyclictest23260-21fschecks_count11:19:411
32094997949,13cyclictest10110-21rm10:57:541
32087997958,14cyclictest17452-21ssh10:14:560
32102997861,11cyclictest5398-21acpi08:59:302
32102997859,13cyclictest1307-21sh11:36:182
3210299784,65cyclictest20077-21apt-get11:14:342
32094997856,8cyclictest31-21ksoftirqd/108:36:291
32094997856,8cyclictest31-21ksoftirqd/108:36:291
3209499782,45cyclictest2350-21ssh09:49:461
32102997749,18cyclictest20409-21sh12:09:222
32094997756,8cyclictest181rcu_preempt09:59:361
32094997752,17cyclictest32078-21cyclictest11:04:411
3209499773,24cyclictest10940-21apt-get10:59:311
3208799779,39cyclictest1-21systemd10:39:200
3208799779,39cyclictest1-21systemd10:39:200
32087997758,11cyclictest0-21swapper/008:35:040
32087997758,11cyclictest0-21swapper/008:35:040
32087997757,14cyclictest18450-21kworker/u17:1+xprtiod10:20:430
3208799775,38cyclictest8848-21fschecks_count11:49:400
3208799775,38cyclictest8848-21fschecks_count11:49:400
3208799774,37cyclictest2201-21df_inode10:44:390
32087997720,27cyclictest0-21swapper/012:29:300
173582770,5sleep2371rcuc/209:20:262
173582770,5sleep2371rcuc/209:20:262
32102997658,12cyclictest2952-21systemd-journal12:12:302
32102997658,12cyclictest2952-21systemd-journal12:12:302
32102997654,15cyclictest13099-21latency_hist07:44:232
3210299764,34cyclictest1030-21/usr/sbin/munin08:44:472
3210299762,59cyclictest24657-21kworker/u19:1+ext4-rsv-conversion07:49:472
32094997645,14cyclictest181rcu_preempt07:19:361
3209499762,29cyclictest22725-21ssh10:24:371
3208799767,59cyclictest28193-21munin-run10:34:200
3208799764,41cyclictest30005-21ntp_states12:24:500
3208799764,41cyclictest30005-21ntp_states12:24:500
32087997633,36cyclictest0-21swapper/009:34:520
32087997633,36cyclictest0-21swapper/009:34:520
32087997619,35cyclictest0-21swapper/009:39:400
32102997555,14cyclictest28639-21latency_hist11:29:232
32102997553,16cyclictest1-21systemd10:15:252
32094997551,8cyclictest181rcu_preempt11:44:221
32094997546,9cyclictest181rcu_preempt09:19:331
32094997546,9cyclictest181rcu_preempt09:19:331
3209499753,48cyclictest4431-21unixbench_singl07:14:571
3209499753,40cyclictest2581-21latency08:49:461
3209499753,24cyclictest24917-21grep08:19:391
32087997554,14cyclictest16773-21kworker/u17:1+xprtiod09:44:520
32087997550,15cyclictest16858-21fschecks_time07:54:420
32102997457,12cyclictest32078-21cyclictest07:24:482
32102997454,14cyclictest10392-21fschecks_time09:09:442
32102997433,31cyclictest20293-21wc10:19:522
32094997440,7cyclictest181rcu_preempt07:44:221
3209499742,52cyclictest21965-21sshd10:23:301
3209499742,48cyclictest23342-21fschecks_time08:14:421
3209499742,23cyclictest10479-21ssh11:52:071
3209499742,23cyclictest10479-21ssh11:52:071
3208799744,57cyclictest10706-21acpi10:04:300
3208799743,40cyclictest2029-21sh09:49:390
32102997356,11cyclictest12159-21ntp_kernel_pll_11:54:452
32102997355,10cyclictest0-21swapper/210:29:192
3210299734,34cyclictest27103-21timerandwakeup08:24:562
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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