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2026-03-22 - 11:11
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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 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
11495991002,33cyclictest20164-1kworker/0:0H+mmc_complete19:04:490
11507999974,18cyclictest15191-21latency_hist19:14:482
1149599996,36cyclictest31977-21latency_hist00:09:480
1149599994,37cyclictest3315-21diskmemload00:15:190
1149599994,36cyclictest16365-21fschecks_time21:55:090
1149599993,34cyclictest7316-21taskset23:29:140
1149599993,32cyclictest17624-21cut19:20:190
1149599993,32cyclictest13635-21grep19:09:560
1149599993,31cyclictest22090-21fschecks_time19:35:080
1149599993,29cyclictest8544-21/usr/sbin/munin00:25:010
11495999840,50cyclictest5235-21latency_hist20:24:480
11495999834,10cyclictest0-21swapper/021:42:540
1149599983,36cyclictest8365-21latency_hist00:24:480
1149599983,36cyclictest8365-21latency_hist00:24:480
1149599983,36cyclictest26495-21latency_hist19:49:480
1149599983,36cyclictest26495-21latency_hist19:49:480
1149599983,34cyclictest1155-21/usr/sbin/munin21:29:540
1149599983,33cyclictest7090-21/usr/sbin/munin20:30:190
11495999824,12cyclictest0-21swapper/020:55:100
11495999824,12cyclictest0-21swapper/020:55:100
11495999824,12cyclictest0-21swapper/020:29:490
1149599973,38cyclictest28990-21apt-key00:04:490
1149599973,35cyclictest5241-21sh22:30:170
1149599973,34cyclictest1706-21latency_hist23:19:470
1149599973,32cyclictest11566-21/usr/sbin/munin20:40:580
11507999649,41cyclictest200-21systemd-journal21:53:412
1149599963,34cyclictest17793-21grep21:00:210
1149599963,31cyclictest11051-21fschecks_count23:35:060
1149599963,30cyclictest15708-21modprobe21:54:450
1149599962,31cyclictest18985-21latency19:25:110
11495999612,27cyclictest32400-21/usr/sbin/munin00:10:090
11495999612,27cyclictest32400-21/usr/sbin/munin00:10:090
1149599953,36cyclictest24349-21unixbench_multi19:40:220
1149599953,36cyclictest24349-21unixbench_multi19:40:220
1149599953,34cyclictest13124-21latency_hist19:09:480
1149599953,34cyclictest13124-21latency_hist19:09:480
1149599952,36cyclictest2540-21fschecks_time20:15:070
1149599952,33cyclictest14201-21kernelversion20:50:110
11495999516,25cyclictest4839-21proc_pri21:35:180
11495999516,25cyclictest4839-21proc_pri21:35:180
1149599933,32cyclictest10507-21latency_hist22:39:490
11507999250,35cyclictest0-21swapper/222:21:362
1150799913,33cyclictest4262-21kernelversion20:20:132
1150799913,33cyclictest32261-21ls20:05:212
11507999116,28cyclictest277-21dbus-daemon19:19:472
1149599913,34cyclictest15590-21grep19:15:070
11507999041,43cyclictest32037-21/usr/sbin/munin00:10:192
11507999041,43cyclictest32037-21/usr/sbin/munin00:10:192
11507999039,45cyclictest10210-21sh22:39:402
11507998953,30cyclictest22644-21latency_hist23:54:492
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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