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2026-09-18 - 17:50
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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 Fri Sep 18, 2026 12:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
162429912665,8cyclictest0-21swapper/008:19:340
1585821026,16sleep20-21swapper/207:05:552
1585821026,16sleep20-21swapper/207:05:552
16255991007,56cyclictest26205-21apt-get11:54:152
16255991007,56cyclictest26205-21apt-get11:54:152
16255999957,35cyclictest0-21swapper/212:09:192
16247999984,9cyclictest31228-21systemd11:08:591
1625599973,30cyclictest19408-21head07:14:372
1625599943,32cyclictest16827-21ssh12:32:282
16255999366,17cyclictest30663-21sh09:19:342
1625599934,42cyclictest20009-21ssh11:44:092
1625599933,33cyclictest11684-21/usr/sbin/munin12:24:282
1625599933,33cyclictest11684-21/usr/sbin/munin12:24:282
16255999271,14cyclictest3356-21unixbench_singl08:04:362
16255999233,52cyclictest0-21swapper/207:54:192
16242999266,19cyclictest0-21swapper/010:39:190
16247999171,9cyclictest0-21swapper/107:14:051
16255999053,31cyclictest6756-21latency09:34:262
1625599902,33cyclictest21168-21latency_hist09:59:002
16255998936,46cyclictest0-21swapper/210:13:582
1625599893,25cyclictest18723-21sh12:34:352
1625599892,29cyclictest4245-21timerwakeupswit09:29:342
1625599892,29cyclictest4245-21timerwakeupswit09:29:342
16242998970,12cyclictest22093-21apt-key10:54:000
16242998969,14cyclictest22524-21ntp_kernel_pll_09:04:270
16255998838,42cyclictest0-21swapper/209:28:212
1625599883,30cyclictest28465-21grep07:44:202
1625599883,30cyclictest11111-21cpuspeed11:29:132
16247998869,9cyclictest0-21swapper/107:59:001
16247998867,11cyclictest0-21swapper/108:38:581
16247998867,11cyclictest0-21swapper/108:38:581
16247998859,12cyclictest181rcu_preempt08:54:171
16247998859,12cyclictest181rcu_preempt08:54:171
1625599873,32cyclictest31389-21ntpq10:15:082
1625599873,32cyclictest31389-21ntpq10:15:082
1625599873,32cyclictest30394-21grep11:59:592
1625599873,30cyclictest780-21/usr/sbin/munin07:59:222
1625599873,30cyclictest26545-21latency_hist09:14:012
1625599873,28cyclictest20460-21rm10:49:432
16255998732,47cyclictest0-21swapper/211:34:182
16255998718,22cyclictest6033-21grep11:19:332
16255998711,35cyclictest8099-21diskmemload11:24:132
16247998767,13cyclictest14249-21ssh11:34:201
16242998767,10cyclictest0-21swapper/011:49:140
16242998767,10cyclictest0-21swapper/011:49:140
1625599863,37cyclictest13093-21ssh10:39:002
1625599863,35cyclictest21690-21/usr/sbin/munin07:24:262
1625599863,32cyclictest25833-21fschecks_time10:59:202
1625599863,31cyclictest4585-21taskset10:24:462
1625599863,29cyclictest28497-21/usr/sbin/munin11:04:272
1625599863,29cyclictest18158-21vmstat08:49:342
1625599863,29cyclictest16904-21modprobe08:48:572
1625599862,61cyclictest22579-21ssh10:54:192
1625599862,61cyclictest22579-21ssh10:54:192
16247998666,10cyclictest0-21swapper/110:00:031
16247998666,10cyclictest0-21swapper/110:00:031
1625599853,35cyclictest21324-21ssh09:59:092
1625599853,35cyclictest21324-21ssh09:59:092
1625599853,33cyclictest5613-21/usr/sbin/munin08:14:142
1625599853,31cyclictest27045-21idleruntime09:14:202
1625599853,31cyclictest27045-21idleruntime09:14:202
1625599853,30cyclictest2285-21fschecks_count11:14:192
1625599853,30cyclictest2285-21fschecks_count11:14:192
1625599853,29cyclictest16677-21fschecks_time07:09:192
1625599852,35cyclictest14147-21fschecks_count08:39:302
16247998571,8cyclictest0-21swapper/107:24:301
16247998563,17cyclictest28239-21cpu07:44:151
16242998569,11cyclictest200-21systemd-journal10:04:400
16242998568,9cyclictest26395-21munin-run09:13:580
16242998565,11cyclictest0-21swapper/011:24:190
1625599843,33cyclictest20124-21apt08:58:582
1625599843,33cyclictest20124-21apt08:58:582
1625599843,33cyclictest10462-21/usr/sbin/munin08:29:132
1625599843,32cyclictest26589-21latency_hist07:39:012
1625599843,32cyclictest26589-21latency_hist07:39:012
1625599843,30cyclictest17271-21fschecks_count11:39:192
1625599843,28cyclictest12733-21grep08:34:312
1625599843,28cyclictest12733-21grep08:34:312
1625599843,26cyclictest13877-21/usr/sbin/munin10:39:242
16255998430,46cyclictest0-21swapper/210:19:162
1625599842,31cyclictest23685-21kernelversion07:29:222
1625599842,31cyclictest23685-21kernelversion07:29:222
16255998419,23cyclictest9798-21grep12:19:332
16247998463,8cyclictest181rcu_preempt10:13:201
1625599833,30cyclictest8563-21sort12:19:002
1625599832,33cyclictest21746-21cron09:03:572
1625599832,31cyclictest20683-21processes07:19:302
1625599832,31cyclictest16794-21latency10:44:222
1625599832,27cyclictest4505-21sed08:09:252
1625599832,20cyclictest15300-21apt-get09:49:142
16247998369,8cyclictest0-21swapper/110:29:191
16242998369,7cyclictest0-21swapper/007:24:020
16242998368,9cyclictest10245-21kworker/u18:1-nfsiod09:18:200
16242998368,9cyclictest10245-21kworker/u18:1-nfsiod09:18:200
16242998352,10cyclictest0-21swapper/009:49:010
16242998342,8cyclictest181rcu_preempt11:12:500
16255998234,41cyclictest7336-21cpu10:29:132
1625599823,27cyclictest23944-21timerwakeupswit11:49:322
1625599823,27cyclictest23944-21timerwakeupswit11:49:322
1625599823,26cyclictest343-21runrttasks08:26:082
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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