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2026-04-13 - 02:30
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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
Characteristics of the 50 highest latencies:
System rackdslot1.osadl.org (updated Sun Apr 12, 2026 12:45:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134491620,3ptp4l28850-21/usr/sbin/munin11:10:203
134491610,4ptp4l0-21swapper/012:15:030
134491600,4ptp4l0-21swapper/107:55:231
134491590,5ptp4l25161-21ps08:40:240
134491590,19ptp4l0-21swapper/008:55:210
134491580,4ptp4l0-21swapper/211:47:402
134491580,3ptp4l8560-21memory08:05:210
134491580,2ptp4l0-21swapper/009:55:290
134491570,5ptp4l0-21swapper/207:07:192
134491560,3ptp4l0-21swapper/108:50:161
134491560,3ptp4l0-21swapper/108:50:161
134491560,3ptp4l0-21swapper/107:32:021
134491550,4ptp4l0-21swapper/011:35:570
134491550,4ptp4l0-21swapper/009:00:190
134491550,4ptp4l0-21swapper/007:35:360
134491550,3ptp4l0-21swapper/009:30:290
134491540,5ptp4l0-21swapper/109:33:521
134491540,4ptp4l0-21swapper/112:05:501
134491540,4ptp4l0-21swapper/107:11:061
134491540,4ptp4l0-21swapper/011:18:250
134491520,4ptp4l5951-21if_enp4s009:10:151
134491520,3ptp4l0-21swapper/109:17:111
134491520,2ptp4l21479-21apt-get07:25:121
134491510,5ptp4l0-21swapper/307:06:093
134491510,4ptp4l0-21swapper/012:24:180
134491510,4ptp4l0-21swapper/012:01:380
134491510,3ptp4l0-21swapper/107:15:151
134491510,3ptp4l0-21swapper/007:32:530
3352500,1sleep1330-21unixbench_singl11:15:281
134491500,4ptp4l16499-21chrt08:24:090
134491500,4ptp4l0-21swapper/211:30:362
134491500,4ptp4l0-21swapper/112:16:021
134491500,4ptp4l0-21swapper/008:10:360
134491500,3ptp4l20716-21timedrift09:40:260
134491500,3ptp4l0-21swapper/011:24:580
134491500,3ptp4l0-21swapper/008:15:470
134491500,2ptp4l0-21swapper/009:50:210
134491490,4ptp4l0-21swapper/310:07:183
134491490,4ptp4l0-21swapper/109:54:201
134491490,4ptp4l0-21swapper/012:13:460
134491490,4ptp4l0-21swapper/008:48:210
134491490,14ptp4l9-21ksoftirqd/012:34:280
134491480,4ptp4l0-21swapper/209:39:152
134491480,4ptp4l0-21swapper/108:24:001
134491480,4ptp4l0-21swapper/011:55:050
134491480,4ptp4l0-21swapper/010:56:160
134491480,4ptp4l0-21swapper/010:33:260
134491480,3ptp4l1301-21snmpd10:39:332
134491480,3ptp4l0-21swapper/110:23:031
134491480,3ptp4l0-21swapper/107:50:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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