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2023-06-05 - 01:39

ARM Freescale i.MX6 Quad @996 MHz, Linux 5.16.2-rt19 (Profile)

Latency plot of system in rack #b, slot #7
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 -q
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 (updated Sun Jun 04, 2023 12:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2139099994,74cyclictest25265-21apt-get11:51:462
21388999666,20cyclictest15581-21ssh09:41:480
21391998339,37cyclictest0-21swapper/312:26:543
2139199824,25cyclictest9350-21fschecks_time08:06:493
2139199824,24cyclictest23551-21/usr/sbin/munin09:57:013
21391998241,34cyclictest0-21swapper/311:32:033
2139199823,17cyclictest23687-21grep07:11:523
2139199823,17cyclictest23687-21grep07:11:523
2139199823,14cyclictest1521-21sendmail09:16:213
2139199813,20cyclictest3580-21unixbench_singl07:46:593
2139199804,22cyclictest8870-21idleruntime-cro08:06:213
2139199804,22cyclictest8870-21idleruntime-cro08:06:213
2139199804,14cyclictest13933-21latency_hist08:21:233
21391998035,37cyclictest0-21swapper/307:37:063
21391998021,11cyclictest1572-21sh11:11:243
2139199794,16cyclictest28512-21fschecks_time11:56:493
2139199793,18cyclictest15929-21fschecks_time08:26:493
2139199792,19cyclictest11707-21head08:12:003
21391997918,53cyclictest0-21swapper/312:11:523
21391997918,53cyclictest0-21swapper/312:11:523
2139199784,21cyclictest15410-21grep09:41:243
2139199784,15cyclictest18179-21/usr/sbin/munin09:46:563
2139199784,15cyclictest18179-21/usr/sbin/munin09:46:563
2139199784,14cyclictest28163-21unixbench_singl09:02:133
2139199783,23cyclictest363-21rs:main3
2139199783,21cyclictest26516-21grep10:01:473
2139199782,22cyclictest5579-21modprobe07:56:213
2139199782,22cyclictest5579-21modprobe07:56:213
2139199774,21cyclictest5639-21unixbench_multi11:17:043
2139199774,20cyclictest21406-21latency_hist07:06:263
2139199774,19cyclictest25189-21cat08:56:213
2139199774,12cyclictest26175-21unixbench_multi07:17:013
2139199773,21cyclictest23075-21latency_hist07:11:313
2139199773,19cyclictest26139-21awk11:52:063
2139199773,17cyclictest29496-21tail07:27:023
2139199773,14cyclictest10365-21/usr/sbin/munin12:21:493
2139199773,14cyclictest10365-21/usr/sbin/munin12:21:493
21391997725,43cyclictest0-21swapper/307:36:223
21391997711,13cyclictest0-21swapper/310:41:593
2138999774,43cyclictest1920-21df11:11:581
21388997753,15cyclictest25531-21fschecks_count11:51:540
2139199765,13cyclictest15822-21fschecks_count09:42:033
2139199763,21cyclictest4672-21grep10:21:243
2139199763,20cyclictest2857-21ssh09:17:043
2139199763,18cyclictest28476-21fschecks_time11:01:503
2139199763,18cyclictest10768-21fschecks_time11:26:493
2139199763,16cyclictest10756-21grep10:31:503
2139199763,15cyclictest12610-21latency_hist09:36:243
21391997628,41cyclictest0-21swapper/311:16:213
21391997626,40cyclictest0-21swapper/309:21:543
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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