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2026-07-23 - 17:29
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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 Jul 23, 2026 12:44:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32222222790,15sleep232219-21apt-config06:56:302
32222222790,15sleep232219-21apt-config06:56:302
30895215612,96sleep030975-21fschecks_time06:51:520
30895215612,96sleep030975-21fschecks_time06:51:520
32317991173,39cyclictest7705-21apt-get11:36:480
32317991124,32cyclictest18973-21cstates07:51:430
32344991113,78cyclictest24149-21apt-get10:16:442
32344991083,81cyclictest352-21runrttasks07:56:532
32344991083,81cyclictest352-21runrttasks07:56:532
32184210819,53sleep132063-21/usr/sbin/munin06:56:301
32184210819,53sleep132063-21/usr/sbin/munin06:56:301
32317991053,53cyclictest31509-21kernelversion11:22:070
323269910124,28cyclictest0-21swapper/110:53:331
323269910124,28cyclictest0-21swapper/110:53:331
32317999861,15cyclictest181rcu_preempt10:01:420
3231799975,70cyclictest24933-21modprobe11:11:480
32317999715,32cyclictest8680-21apt-get09:52:160
32317999613,76cyclictest24186-21ssh10:16:430
32317999467,19cyclictest15446-21latency_hist07:41:280
3231799943,83cyclictest12467-21runrttasks07:32:100
3231799937,77cyclictest32604-21apt-get06:56:440
3231799937,77cyclictest32604-21apt-get06:56:440
32317999219,34cyclictest20929-21apt-get10:11:400
32326999128,23cyclictest24961-21ssh12:05:461
32326999123,54cyclictest24300-21ssh10:17:021
3234499903,64cyclictest24877-21apt-get11:11:422
32326999028,24cyclictest9301-21seq10:46:241
3231799903,42cyclictest352-21runrttasks11:19:120
32344998921,14cyclictest0-21swapper/211:52:042
32344998921,14cyclictest0-21swapper/211:52:042
32326998928,23cyclictest25886-21seq09:26:321
32326998928,23cyclictest25886-21seq09:26:321
32326998828,23cyclictest1234-21seq09:38:561
32326998827,27cyclictest1143-21seq11:26:171
32326998725,23cyclictest11701-21seq07:29:291
3235599862,34cyclictest308-21chrt06:57:203
3235599862,34cyclictest308-21chrt06:57:203
32326998661,17cyclictest32295-21cyclictest08:56:561
32317998664,17cyclictest9923-21fschecks_count10:46:470
3231799862,76cyclictest16758-21kworker/u17:3+ext4-rsv-conversion07:57:140
3231799862,76cyclictest16758-21kworker/u17:3+ext4-rsv-conversion07:57:140
32326998536,38cyclictest0-21swapper/110:26:421
32326998536,38cyclictest0-21swapper/110:26:421
32326998535,37cyclictest0-21swapper/107:36:371
32326998529,24cyclictest352-21runrttasks10:58:281
32326998527,24cyclictest16628-21seq07:42:081
32326998523,25cyclictest352-21runrttasks11:49:121
32326998522,28cyclictest7380-21munin-plugin-st08:56:251
32326998522,28cyclictest7380-21munin-plugin-st08:56:251
32326998517,50cyclictest8680-21apt-get09:51:401
32317998555,10cyclictest181rcu_preempt11:31:370
32317998555,10cyclictest181rcu_preempt11:31:370
3235599843,36cyclictest22867-21taskset08:01:563
3234499842,58cyclictest12366-21apt-get07:31:412
32326998427,23cyclictest10111-21seq07:25:031
32326998427,23cyclictest10111-21seq07:25:031
32326998423,30cyclictest8153-21apt-get09:51:251
32317998458,17cyclictest7387-21diskmemload10:42:010
3231799845,71cyclictest22355-21apt-get09:21:450
32344998361,15cyclictest22339-21cpu08:01:422
32326998323,25cyclictest13641-21seq07:35:041
32317998356,10cyclictest181rcu_preempt08:01:410
32317998348,11cyclictest181rcu_preempt07:21:390
32317998348,11cyclictest181rcu_preempt07:21:390
32344998262,14cyclictest2731-21cut09:41:462
32344998262,14cyclictest2731-21cut09:41:462
32326998220,27cyclictest352-21runrttasks08:17:321
32317998260,15cyclictest16239-21ssh10:56:530
32344998160,13cyclictest0-21swapper/211:42:022
32344998160,13cyclictest0-21swapper/211:42:022
32326998145,28cyclictest22059-21modprobe08:01:251
32326998145,28cyclictest22059-21modprobe08:01:251
32326998124,21cyclictest0-21swapper/108:23:201
32326998119,26cyclictest0-21swapper/108:06:271
32317998155,19cyclictest24325-21latency_hist11:11:280
32317998155,19cyclictest24325-21latency_hist11:11:280
32317998151,9cyclictest181rcu_preempt07:46:400
32317998059,14cyclictest32295-21cyclictest12:22:540
3231799803,37cyclictest17741-21grep09:12:030
3231799803,37cyclictest17741-21grep09:12:030
3235599794,34cyclictest20707-21chrt09:17:033
3235599793,45cyclictest21158-21taskset10:12:153
32344997956,16cyclictest26204-21fschecks_time09:26:472
32344997956,16cyclictest26204-21fschecks_time09:26:472
3234499793,38cyclictest28990-21fschecks_count08:21:482
32326997912,23cyclictest0-21swapper/108:39:321
32326997912,23cyclictest0-21swapper/108:39:321
3231799798,35cyclictest15-21ksoftirqd/008:51:400
3231799798,35cyclictest15-21ksoftirqd/008:51:400
32317997959,14cyclictest32295-21cyclictest09:20:500
32317997955,15cyclictest23109-21ssh12:01:530
32317997943,28cyclictest15369-21ssh09:08:350
32344997847,22cyclictest21889-21fschecks_count11:06:472
32344997847,22cyclictest21889-21fschecks_count11:06:472
32326997832,33cyclictest0-21swapper/111:06:381
32326997832,33cyclictest0-21swapper/111:06:381
32326997823,26cyclictest13526-21latency_hist11:46:281
32326997823,26cyclictest13526-21latency_hist11:46:281
32326997814,34cyclictest0-21swapper/112:06:391
32317997854,16cyclictest544-21cron12:01:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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