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2026-03-24 - 09:16
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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 Mar 24, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1863321136,64sleep018448-21/usr/sbin/munin19:00:050
199389910528,50cyclictest15448-21ssh21:38:490
199389910528,50cyclictest15448-21ssh21:38:490
19956991042,71cyclictest28353-21apt-get22:54:522
19956991042,71cyclictest28353-21apt-get22:54:522
199389910321,55cyclictest9620-21rm22:22:440
199389910321,55cyclictest9620-21rm22:22:440
199389910234,20cyclictest6101-21apt-get19:59:480
199389910227,40cyclictest352-21runrttasks22:09:520
199389910226,31cyclictest0-21swapper/023:19:480
199389910226,31cyclictest0-21swapper/023:19:480
199389910223,33cyclictest16716-21unixbench_multi20:30:150
199389910223,33cyclictest16716-21unixbench_multi20:30:150
199389910025,40cyclictest24995-21/usr/sbin/munin21:54:490
199389910024,30cyclictest0-21swapper/020:14:390
19938999836,38cyclictest14202-21ssh22:30:090
19938999833,28cyclictest11846-21grep00:15:000
19938999822,35cyclictest0-21swapper/023:00:010
19938999822,35cyclictest0-21swapper/023:00:010
19938999744,41cyclictest12611-21apt-get20:19:540
19938999726,29cyclictest8787-21/usr/sbin/munin23:15:030
19938999633,27cyclictest25923-21/usr/sbin/munin19:20:060
19938999633,27cyclictest25923-21/usr/sbin/munin19:20:060
19938999630,27cyclictest0-21swapper/023:25:070
19938999620,41cyclictest27362-21diskmemload23:34:380
19938999529,27cyclictest4562-21rm00:02:340
19938999528,28cyclictest6794-21rm22:18:070
19938999527,22cyclictest18626-21seq20:37:400
19938999527,22cyclictest18626-21seq20:37:400
19938999525,47cyclictest0-21swapper/022:01:110
19938999523,45cyclictest30278-21rm23:50:220
19938999523,45cyclictest30278-21rm23:50:220
19938999523,32cyclictest22745-21/usr/sbin/munin22:44:480
19938999523,32cyclictest22745-21/usr/sbin/munin22:44:480
19938999522,31cyclictest27998-21/usr/sbin/munin19:25:150
19938999520,38cyclictest24792-21if_eth020:55:440
19938999519,43cyclictest12703-21rm22:28:050
19956999459,11cyclictest181rcu_preempt19:27:442
19956999451,13cyclictest181rcu_preempt22:15:032
19956999448,12cyclictest181rcu_preempt22:00:002
1995099942,69cyclictest29698-21tr22:56:001
1995099942,69cyclictest29698-21tr22:56:001
19938999433,27cyclictest20412-21apt-get20:44:510
19938999431,29cyclictest18454-21ssh21:43:570
19938999428,31cyclictest26003-21/usr/sbin/munin20:59:490
19938999428,26cyclictest1781-21ntp_states19:45:080
19938999424,32cyclictest19884-21/usr/sbin/munin21:45:120
19938999423,29cyclictest21714-21munin-node19:09:490
19938999419,28cyclictest24228-21ssh21:53:270
19963999312,70cyclictest4943-21chrt22:15:323
19956999371,16cyclictest23299-21sh22:46:022
19956999371,16cyclictest23299-21sh22:46:022
19938999333,18cyclictest7129-21apt-get21:24:540
19938999333,18cyclictest7129-21apt-get21:24:540
19938999332,29cyclictest32044-21ssh22:05:170
19938999328,27cyclictest5352-21ssh23:09:470
19938999325,32cyclictest26779-21/usr/sbin/munin22:50:120
19938999325,31cyclictest19676-21snmpd23:05:110
19938999325,31cyclictest19676-21snmpd23:05:110
19938999325,28cyclictest19574-21grep20:40:080
19938999324,30cyclictest29741-21ssh21:07:560
19938999320,37cyclictest8037-21ssh00:09:030
19938999320,37cyclictest8037-21ssh00:09:030
19938999231,24cyclictest21331-21ssh23:35:160
19938999228,29cyclictest839-21rm23:01:060
19938999228,27cyclictest6393-21ssh21:23:290
19938999227,30cyclictest16040-21rm00:21:260
19938999227,27cyclictest1855-21ssh23:58:190
186362928,54sleep118689-21fschecks_count19:00:061
19950999170,11cyclictest4613-21sh22:14:421
19938999130,24cyclictest24329-21taskset19:15:070
19938999130,24cyclictest18640-21sh22:38:010
19938999130,24cyclictest18640-21sh22:38:010
19938999126,25cyclictest24017-21apt-config20:54:400
19938999125,29cyclictest19659-21/usr/sbin/munin22:39:570
19938999125,29cyclictest19659-21/usr/sbin/munin22:39:570
19938999124,30cyclictest14834-21find20:25:120
19950999072,10cyclictest17387-21latency_hist00:24:401
19938999029,26cyclictest24721-21ssh23:41:280
19938999028,25cyclictest22453-21ssh00:32:460
19938999027,28cyclictest11433-21rm21:30:540
19938999022,30cyclictest8961-21/usr/sbin/munin00:10:030
19938999021,21cyclictest1594-21irqstats21:15:030
19956998966,16cyclictest19926-21cyclictest20:04:552
19956998939,10cyclictest181rcu_preempt23:05:122
19956998939,10cyclictest181rcu_preempt23:05:122
19950998923,40cyclictest31-21ksoftirqd/120:25:051
19938998929,21cyclictest28190-21sh23:47:530
19938998925,28cyclictest20623-21/usr/sbin/munin19:05:030
19938998925,27cyclictest20056-21ssh00:29:230
19938998925,26cyclictest30663-21sh21:09:510
19956998855,11cyclictest181rcu_preempt22:23:392
19956998855,11cyclictest181rcu_preempt22:23:392
19950998846,19cyclictest0-21swapper/122:16:091
19938998826,22cyclictest0-21swapper/019:55:030
19938998822,26cyclictest32038-21cut19:39:410
19938998821,29cyclictest28349-21apt-get19:29:500
19956998725,32cyclictest0-21swapper/222:52:202
19950998722,34cyclictest31-21ksoftirqd/122:04:101
19938998726,25cyclictest8297-21uname20:05:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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