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2026-03-28 - 15:46
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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 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
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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