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2026-03-22 - 11:09
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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 50 highest latencies:
System rackbslot7.osadl.org (updated Sun Mar 22, 2026 00:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1038321590,18sleep2371rcuc/219:00:152
11495991263,49cyclictest25446-21ssh23:04:580
2942621130,5sleep129427-21sh00:05:301
11499991112,63cyclictest31142-21apt-get22:20:061
114959910938,64cyclictest3303-21ssh22:26:570
11495991093,29cyclictest24447-21/usr/sbin/munin23:56:340
11495991085,45cyclictest2340-21cut23:20:100
11495991085,45cyclictest2340-21cut23:20:100
11495991063,30cyclictest28834-21ssh22:15:210
11495991063,30cyclictest28834-21ssh22:15:210
114959910624,24cyclictest17213-21/usr/sbin/munin23:45:110
114959910531,8cyclictest0-21swapper/023:40:190
114959910520,28cyclictest21970-21/usr/sbin/munin22:05:130
114959910434,8cyclictest0-21swapper/021:04:560
11495991043,34cyclictest28600-21/usr/sbin/munin23:10:070
11495991043,34cyclictest28600-21/usr/sbin/munin23:10:070
11495991043,32cyclictest10081-21/usr/sbin/munin21:45:020
11495991043,32cyclictest10081-21/usr/sbin/munin21:45:020
11495991043,31cyclictest19624-21cstates22:55:020
114959910417,22cyclictest9102-21apt-get20:35:490
114959910417,22cyclictest9102-21apt-get20:35:490
11495991033,36cyclictest30651-21/usr/sbin/munin21:25:070
11495991033,34cyclictest16699-21diskstats22:50:050
11495991033,34cyclictest16699-21diskstats22:50:050
11495991033,33cyclictest22067-21grep21:10:080
11495991033,32cyclictest13531-21/usr/sbin/munin22:45:100
11495991023,38cyclictest31777-21needreboot22:20:330
11495991023,34cyclictest29872-21/usr/sbin/munin20:00:040
1033321029,63sleep110382-21/usr/sbin/munin19:00:151
114959910135,58cyclictest0-21swapper/022:39:590
114959910135,58cyclictest0-21swapper/022:39:590
11495991013,39cyclictest32262-21sort20:05:210
11495991013,39cyclictest18451-21diskmemload21:15:210
11495991013,39cyclictest18451-21diskmemload21:15:210
11495991013,36cyclictest22407-21modprobe23:54:460
11495991013,27cyclictest11519-21ssh00:30:010
11495991013,27cyclictest11519-21ssh00:30:010
114959910125,13cyclictest0-21swapper/022:02:230
11495991012,35cyclictest28040-21fschecks_time21:20:090
11495991012,34cyclictest12503-21fschecks_time20:45:070
11495991012,33cyclictest8391-21ssh23:30:140
11495991004,41cyclictest26895-21grep19:50:070
11495991004,35cyclictest873-21fschecks_time20:10:070
11495991004,35cyclictest873-21fschecks_time20:10:070
114959910040,52cyclictest0-21swapper/022:13:140
114959910040,52cyclictest0-21swapper/022:13:140
11495991003,34cyclictest28256-21/usr/sbin/munin19:55:250
11495991002,44cyclictest24494-21chrt23:03:000
11495991002,44cyclictest24494-21chrt23:03:000
11495991002,35cyclictest20174-21/usr/sbin/munin19:30:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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