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2026-09-08 - 16:27
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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 Tue Sep 08, 2026 12:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
146649913762,39cyclictest524-21in:imuxsock07:49:392
13213212012,77sleep013167-21apt-get07:05:180
146579911358,48cyclictest524-21in:imuxsock11:17:051
146579911046,57cyclictest21794-21diskmemload10:29:421
146579910535,10cyclictest0-21swapper/110:59:411
146579910338,10cyclictest0-21swapper/108:05:021
146579910336,13cyclictest0-21swapper/109:10:381
14657991013,46cyclictest31171-21latency_hist09:24:401
14657991013,46cyclictest31171-21latency_hist09:24:401
1464899999,65cyclictest20973-21apt-get09:59:540
14648999966,23cyclictest4170-21latency_hist08:14:410
14648999966,23cyclictest4170-21latency_hist08:14:410
139192999,55sleep113957-21switchtime07:06:211
1465799984,39cyclictest18410-21latency11:40:051
1466499973,33cyclictest4543-21fschecks_time08:14:592
1466499963,37cyclictest343-21runrttasks08:19:532
1465799964,43cyclictest11106-21latency_hist09:44:411
14657999639,19cyclictest31020-21threads07:55:141
14657999639,19cyclictest31020-21threads07:55:141
1464899969,65cyclictest26544-21apt-get07:44:560
247312950,4sleep30-21swapper/310:58:263
1320429514,50sleep30-21swapper/307:05:173
1317529413,53sleep212665-21apt-get07:04:552
14664999347,38cyclictest0-21swapper/210:25:102
1466499934,34cyclictest20179-21sh09:04:382
1466499934,34cyclictest20179-21sh09:04:382
1465799934,36cyclictest19197-21runrttasks12:35:001
14648999316,56cyclictest24678-21apt-get07:39:530
1466499923,40cyclictest1737-21uptime12:05:162
1466499923,33cyclictest3046-21ssh11:15:052
1465799914,35cyclictest343-21runrttasks09:55:561
14648999156,27cyclictest28618-21ssh11:04:410
14664999048,35cyclictest0-21swapper/211:25:152
14664999048,35cyclictest0-21swapper/211:25:152
14664999045,37cyclictest0-21swapper/209:50:162
14664999045,37cyclictest0-21swapper/209:50:162
1466499903,37cyclictest21961-21latency_hist12:39:402
1465799903,39cyclictest17353-21sshd11:39:041
1465799903,39cyclictest17353-21sshd11:39:041
1465799903,39cyclictest11592-21rm10:36:161
1464899907,48cyclictest14568-21apt-get09:50:090
1464899907,48cyclictest14568-21apt-get09:50:090
14648998960,20cyclictest24848-21latency_hist07:39:410
14648998926,25cyclictest29128-21fschecks_time11:05:000
1466499883,29cyclictest14325-21apt-config09:49:422
14664998767,13cyclictest23422-21cstates07:34:552
1466499873,42cyclictest343-21runrttasks09:39:542
1466499873,38cyclictest31042-21timerandwakeup07:55:142
1466499873,38cyclictest31042-21timerandwakeup07:55:142
14664998713,34cyclictest29446-21ntp_states11:05:082
14657998767,13cyclictest27959-21cron09:19:381
14648998723,20cyclictest10783-21unixbench_multi12:20:130
14648998723,20cyclictest10783-21unixbench_multi12:20:130
14664998664,15cyclictest25174-21cron10:59:382
1466499864,35cyclictest13959-21/usr/sbin/munin08:44:562
1466499864,34cyclictest19895-21/usr/sbin/munin10:50:062
1466499864,34cyclictest19895-21/usr/sbin/munin10:50:062
1466499863,35cyclictest7027-21/usr/sbin/munin10:30:092
1466499863,35cyclictest24138-21ssh11:49:572
1466499862,37cyclictest22612-21grep07:30:172
14648998620,23cyclictest746-21latency_hist10:19:430
14648998620,23cyclictest746-21latency_hist10:19:430
1466499853,40cyclictest343-21runrttasks07:29:412
1466499853,37cyclictest26919-21cat07:44:422
1466499853,35cyclictest19067-21modprobe10:49:382
1466499853,32cyclictest15531-21modprobe12:29:372
1466499853,27cyclictest20650-21cmp09:59:412
1466499852,35cyclictest20894-21/usr/sbin/munin11:45:072
14657998555,21cyclictest10471-21latency_hist08:34:381
14648998562,16cyclictest14636-21cyclictest10:59:370
14648998522,24cyclictest21641-21store12:39:220
14648998522,23cyclictest17487-21find07:15:130
1466499844,34cyclictest11980-21/usr/sbin/munin11:29:592
1466499843,36cyclictest15057-21fschecks_time07:10:002
1466499843,33cyclictest5817-21/usr/sbin/munin11:19:572
1466499842,36cyclictest15151-21grep11:35:012
1466499842,36cyclictest15151-21grep11:35:012
14664998423,54cyclictest0-21swapper/210:21:492
1466499842,31cyclictest13641-21grep10:40:042
14657998461,16cyclictest25632-21latency07:40:401
1465799843,55cyclictest25775-21apt-get10:59:561
14648998419,22cyclictest5736-21cstates11:19:550
1467099838,54cyclictest0-21swapper/309:49:543
1467099838,54cyclictest0-21swapper/309:49:543
1466499834,36cyclictest31872-21/usr/sbin/munin11:10:042
1466499834,35cyclictest23886-21latency_hist10:04:402
1466499833,39cyclictest30454-21taskset10:15:022
1466499833,39cyclictest30454-21taskset10:15:022
1466499833,37cyclictest5761-21ssh09:35:122
1466499833,37cyclictest5761-21ssh09:35:122
1466499833,33cyclictest12982-21latency_hist10:39:402
1466499832,24cyclictest8248-21switchtime08:25:132
1465799838,64cyclictest14568-21apt-get09:49:551
1465799838,64cyclictest14568-21apt-get09:49:551
14657998340,32cyclictest8885-21kworker/u18:2+nfsiod11:30:421
1466499824,41cyclictest9129-21apt-get08:29:482
1466499824,37cyclictest24146-21taskset09:12:422
1466499823,37cyclictest21801-21idleruntime-cro09:09:382
1466499823,37cyclictest21801-21idleruntime-cro09:09:382
1466499823,37cyclictest15744-21taskset08:49:562
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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