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2026-06-18 - 06:14
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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 Jun 18, 2026 00:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
11741213715,87sleep211761-21unin-run18:58:542
11826991293,88cyclictest20294-21ssh22:49:070
11826991293,88cyclictest20294-21ssh22:49:070
1147221286,16sleep00-21swapper/018:55:580
118319911390,16cyclictest0-21swapper/121:19:281
118319911390,16cyclictest0-21swapper/121:19:281
359721020,7sleep30-21swapper/321:27:143
118359910285,9cyclictest0-21swapper/200:10:042
118319910186,8cyclictest0-21swapper/123:09:271
247022980,9sleep224701-21ssh23:49:462
247022980,9sleep224701-21ssh23:49:462
11826999663,12cyclictest181rcu_preempt19:34:050
1182699953,69cyclictest11341-21apt-get23:29:080
11835999477,11cyclictest352-21runrttasks22:30:552
11826999343,9cyclictest181rcu_preempt21:58:330
11826999343,9cyclictest181rcu_preempt21:58:330
1182699928,61cyclictest4024-21apt-get00:09:060
11835999064,17cyclictest11818-21cyclictest23:40:132
11835999064,17cyclictest11818-21cyclictest23:40:132
11826999064,16cyclictest15308-21ssh21:46:340
11826999052,18cyclictest181rcu_preempt21:11:480
11826999052,18cyclictest181rcu_preempt21:11:480
1182699899,71cyclictest23717-21apt-get23:49:100
1182699899,71cyclictest23717-21apt-get23:49:100
11831998863,17cyclictest2035-21latency_hist22:18:561
11826998853,12cyclictest181rcu_preempt19:08:540
11826998846,9cyclictest181rcu_preempt20:38:530
11826998833,12cyclictest181rcu_preempt00:07:060
11831998769,9cyclictest20729-21cron23:43:501
11831998769,9cyclictest20729-21cron23:43:501
11835998670,10cyclictest8072-21ntp_kernel_pll_21:34:182
11826998646,8cyclictest181rcu_preempt19:59:130
1171128611,50sleep111721-21munin-run18:58:531
11826998555,8cyclictest181rcu_preempt20:18:540
11826998547,12cyclictest181rcu_preempt00:27:260
11835998464,14cyclictest25891-21sh21:09:262
11835998464,14cyclictest25891-21sh21:09:262
11835998464,13cyclictest29071-21latency_hist23:03:552
11835998448,9cyclictest181rcu_preempt21:18:492
11835998447,9cyclictest181rcu_preempt20:52:552
11835998447,10cyclictest181rcu_preempt22:40:022
11835998445,8cyclictest181rcu_preempt21:01:402
11831998465,11cyclictest11818-21cyclictest22:54:251
11826998462,8cyclictest181rcu_preempt22:14:240
11826998451,24cyclictest5605-21latency_hist23:18:550
11826998447,13cyclictest181rcu_preempt19:24:190
11826998441,14cyclictest181rcu_preempt23:05:170
11826998439,9cyclictest181rcu_preempt21:39:240
11826998435,9cyclictest0-21swapper/022:29:560
11835998362,12cyclictest0-21swapper/223:24:252
11835998362,12cyclictest0-21swapper/223:24:252
11835998352,9cyclictest181rcu_preempt23:45:192
11835998341,10cyclictest0-21swapper/221:58:552
11835998341,10cyclictest0-21swapper/221:58:552
11831998364,9cyclictest0-21swapper/122:04:161
11831998364,9cyclictest0-21swapper/122:04:161
11826998359,9cyclictest181rcu_preempt23:42:540
11826998359,9cyclictest181rcu_preempt23:42:540
11826998347,13cyclictest181rcu_preempt20:19:080
11826998333,36cyclictest0-21swapper/021:59:090
11835998266,11cyclictest2374-21systemd-journal21:51:062
11835998261,11cyclictest0-21swapper/220:34:132
11835998245,8cyclictest181rcu_preempt22:44:132
11831998233,10cyclictest181rcu_preempt20:48:541
11826998262,7cyclictest181rcu_preempt22:20:260
11826998255,12cyclictest181rcu_preempt20:49:160
11826998248,9cyclictest181rcu_preempt21:49:580
11826998247,13cyclictest181rcu_preempt19:14:240
11826998247,13cyclictest181rcu_preempt19:14:240
1182699823,46cyclictest28584-21taskset21:14:220
11826998223,18cyclictest0-21swapper/022:24:160
11835998166,10cyclictest1598-21switchtime00:04:272
11835998162,9cyclictest0-21swapper/220:13:552
11835998157,15cyclictest2374-21systemd-journal21:20:172
11835998157,15cyclictest2374-21systemd-journal21:20:172
11835998156,8cyclictest181rcu_preempt23:32:412
11835998153,7cyclictest181rcu_preempt23:38:352
11831998159,16cyclictest7895-21ssh21:34:151
11826998150,12cyclictest181rcu_preempt22:44:130
11826998149,16cyclictest181rcu_preempt23:46:230
11826998147,12cyclictest181rcu_preempt19:54:230
11835998061,10cyclictest0-21swapper/222:50:132
11835998061,10cyclictest0-21swapper/222:50:132
11835998057,7cyclictest181rcu_preempt22:19:412
11835998047,7cyclictest181rcu_preempt21:05:482
11835998042,8cyclictest181rcu_preempt22:17:102
1183599803,37cyclictest39-21ksoftirqd/219:24:352
11831998065,8cyclictest0-21swapper/122:39:281
11826998059,8cyclictest181rcu_preempt18:59:260
11826998056,7cyclictest181rcu_preempt22:34:090
11826998051,8cyclictest181rcu_preempt21:03:170
11826998044,8cyclictest181rcu_preempt23:27:390
11826998044,8cyclictest181rcu_preempt23:27:390
11826998038,27cyclictest0-21swapper/023:35:140
11826998029,9cyclictest0-21swapper/020:09:150
11826998025,8cyclictest0-21swapper/020:44:260
11835997963,9cyclictest0-21swapper/200:14:142
11835997954,7cyclictest181rcu_preempt22:00:432
11835997952,10cyclictest181rcu_preempt00:26:452
11835997951,9cyclictest181rcu_preempt21:26:082
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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