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2025-12-07 - 17:36
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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 Sun Dec 07, 2025 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19785218510,40sleep019789-21systemd-run07:08:240
198929910043,50cyclictest0-21swapper/211:58:242
19892999818,33cyclictest3630-21fschecks_count09:23:452
19892999722,25cyclictest25454-21seq11:00:432
19877999773,16cyclictest10031-21latency_hist12:28:250
1989299964,40cyclictest11138-21unixbench_multi10:34:432
19892999532,9cyclictest0-21swapper/210:03:422
19892999532,10cyclictest0-21swapper/210:18:352
19892999526,11cyclictest0-21swapper/208:34:012
1989299952,38cyclictest975-21latency_hist07:48:242
1988199953,62cyclictest23812-21apt-get10:58:371
226022940,7sleep10-21swapper/109:58:331
226022940,7sleep10-21swapper/109:58:331
1989299943,42cyclictest22492-21latency_hist08:53:242
19892999432,9cyclictest0-21swapper/211:43:092
1989299934,38cyclictest4181-21/usr/sbin/munin10:23:512
19892999335,9cyclictest0-21swapper/210:53:462
19892999335,9cyclictest0-21swapper/210:53:462
19892999334,51cyclictest0-21swapper/212:13:432
19892999322,12cyclictest0-21swapper/209:39:282
1989299924,34cyclictest22364-21cat09:58:242
1989299924,32cyclictest355-21runrttasks11:28:392
1989299923,39cyclictest25291-21/usr/sbin/munin11:59:112
1989299923,39cyclictest25291-21/usr/sbin/munin11:59:112
1989299923,33cyclictest6963-21grep08:03:582
1989299923,33cyclictest6963-21grep08:03:582
54292910,4sleep30-21swapper/312:19:063
1989299914,38cyclictest355-21runrttasks12:18:522
1989299914,36cyclictest3359-21open_files07:53:542
1989299914,36cyclictest3359-21open_files07:53:542
1989299914,36cyclictest30987-21/usr/sbin/munin10:13:482
1989299914,36cyclictest30987-21/usr/sbin/munin10:13:482
1989299914,33cyclictest11098-21latency_hist08:18:252
1989299914,33cyclictest11098-21latency_hist08:18:252
1989299913,35cyclictest17821-21modprobe10:48:212
1989299913,33cyclictest20105-21cut08:44:002
1989299913,33cyclictest13333-21ps08:23:572
1989299913,32cyclictest22886-21fschecks_count09:58:452
1989299913,32cyclictest22886-21fschecks_count09:58:452
19892999126,58cyclictest0-21swapper/211:08:522
19892999126,12cyclictest0-21swapper/208:29:592
1989299912,41cyclictest11160-21sshd08:18:392
1989299912,41cyclictest11160-21sshd08:18:392
19877999165,17cyclictest7973-21latency_hist11:28:250
19877999110,73cyclictest23321-21kworker/u18:1+ext4-rsv-conversion10:34:120
1989299904,36cyclictest25693-21/usr/sbin/munin07:23:462
1989299904,32cyclictest6100-21runrttasks11:23:582
1989299903,40cyclictest1734-21unixbench_multi09:19:012
1989299903,37cyclictest8833-21/usr/sbin/munin09:33:472
1989299903,33cyclictest9499-21ls10:33:242
1989299903,32cyclictest27544-21wc07:28:552
1989299903,32cyclictest25819-21latency_hist09:03:252
1989299903,32cyclictest19756-21latency_hist07:08:272
1989299903,31cyclictest17496-21grep11:43:592
19892999029,12cyclictest0-21swapper/212:23:592
19892999027,13cyclictest0-21swapper/207:58:562
19892999021,23cyclictest21916-21switchtime07:13:332
1989299895,36cyclictest6121-21/usr/sbin/munin09:28:462
1989299895,36cyclictest6121-21/usr/sbin/munin09:28:462
1989299895,32cyclictest4618-21ssh11:22:072
1989299894,34cyclictest25097-21ls07:23:222
1989299893,39cyclictest23149-21ntp_kernel_err08:53:492
1989299893,39cyclictest23149-21ntp_kernel_err08:53:492
1989299893,35cyclictest19647-21fschecks_time11:48:472
1989299893,35cyclictest19647-21fschecks_time11:48:472
1989299893,33cyclictest17837-21apt-get08:38:352
19892998932,8cyclictest0-21swapper/212:28:452
19892998932,8cyclictest0-21swapper/207:33:592
19892998928,9cyclictest181rcu_preempt09:08:552
19892998928,9cyclictest181rcu_preempt09:08:552
19892998927,8cyclictest0-21swapper/209:48:552
19892998927,8cyclictest0-21swapper/209:48:552
19892998925,10cyclictest0-21swapper/210:08:482
1989299892,40cyclictest26894-21unixbench_singl09:04:212
1989299892,30cyclictest28423-21fschecks_count12:03:442
19881998960,20cyclictest24946-21apt-key11:58:251
19881998959,19cyclictest0-21swapper/110:33:411
1989299884,34cyclictest1188-21latency_hist12:13:242
1989299883,33cyclictest13682-21grep10:38:592
1989299883,33cyclictest13682-21grep10:38:592
1989299883,30cyclictest16880-21latency_hist09:48:252
1989299883,30cyclictest16880-21latency_hist09:48:252
1989299883,27cyclictest11221-21idleruntime11:33:492
1989299882,34cyclictest31986-21latency_hist07:43:262
1989299874,35cyclictest7393-21apt-get08:08:342
1989299874,29cyclictest32420-21fschecks_count11:13:442
1989299874,29cyclictest32420-21fschecks_count11:13:442
1989299873,31cyclictest1439-21fschecks_time07:48:442
1989299873,31cyclictest1439-21fschecks_time07:48:442
1989299873,29cyclictest13105-21ssh12:33:342
1989299872,36cyclictest26804-21fschecks_count11:03:452
1989299872,36cyclictest26804-21fschecks_count11:03:452
19892998719,13cyclictest0-21swapper/207:08:452
1988199876,64cyclictest7899-21apt-get08:08:521
19881998736,26cyclictest0-21swapper/111:33:571
1989299864,34cyclictest355-21runrttasks09:14:012
1989299863,32cyclictest20681-21latency_hist10:53:242
19881998668,12cyclictest207-21systemd-journal09:53:211
19881998668,12cyclictest207-21systemd-journal09:53:211
19881998664,15cyclictest16799-21fschecks_time11:43:451
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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