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2022-06-27 - 16:47

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 Mon Jun 27, 2022 12:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2310721369,17sleep00-21swapper/007:01:040
2373921116,15sleep20-21swapper/207:03:262
241279910554,44cyclictest16385-21unixbench_multi11:21:031
2307029913,38sleep30-21swapper/307:01:033
24127998943,39cyclictest18737-21munin-plugin-st12:20:281
24127998835,15cyclictest0-21swapper/109:45:551
24127998724,15cyclictest0-21swapper/110:01:151
24150998636,43cyclictest0-21swapper/311:46:023
24150998634,43cyclictest0-21swapper/307:10:293
24119998636,14cyclictest611-21in:imklog07:50:550
24127998528,8cyclictest0-21swapper/107:55:511
24127998526,13cyclictest0-21swapper/109:30:561
2400228512,46sleep123924-21apt-get07:05:321
24127998433,8cyclictest0-21swapper/111:05:541
24127998430,11cyclictest23051-21unixbench_singl12:26:021
24150998330,7cyclictest0-21swapper/310:55:283
24150998330,7cyclictest0-21swapper/310:55:283
24150998319,10cyclictest0-21swapper/311:51:013
24127998321,14cyclictest0-21swapper/111:50:291
24119998364,13cyclictest10410-21unixbench_singl11:11:080
24119998364,13cyclictest10410-21unixbench_singl11:11:080
24150998229,9cyclictest0-21swapper/309:10:303
24150998229,8cyclictest0-21swapper/312:20:303
24119998267,9cyclictest29890-21fschecks_count09:00:500
24150998126,7cyclictest0-21swapper/310:05:423
2414299818,62cyclictest40762sleep211:55:472
2414299817,52cyclictest0-21swapper/208:05:482
24142998159,14cyclictest21308-21munin-plugin-st08:35:292
2412799812,18cyclictest8220-21cron07:55:291
24119998150,10cyclictest141rcu_preempt11:30:310
24119998150,10cyclictest141rcu_preempt11:30:310
2415099804,20cyclictest26383-21fschecks_time09:50:583
24150998023,12cyclictest0-21swapper/310:36:033
24150998023,12cyclictest0-21swapper/310:36:033
24150998015,14cyclictest0-21swapper/310:10:553
24127998033,7cyclictest0-21swapper/111:50:511
2412799802,35cyclictest5704-21apt-get10:10:471
2415099792,13cyclictest4593-21grep07:41:033
24150997920,12cyclictest0-21swapper/307:30:323
2412799799,12cyclictest0-21swapper/107:40:521
24127997915,15cyclictest0-21swapper/109:10:551
24127997915,15cyclictest0-21swapper/109:10:551
24150997832,20cyclictest611-21in:imklog09:14:433
24150997832,20cyclictest611-21in:imklog09:14:433
24150997823,11cyclictest0-21swapper/309:19:133
24150997821,12cyclictest0-21swapper/308:30:463
24150997819,12cyclictest0-21swapper/311:18:003
24127997861,12cyclictest3674-21fschecks_count11:01:031
24127997824,13cyclictest0-21swapper/111:40:151
24119997863,9cyclictest9713-21unixbench_multi10:16:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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