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2019-07-24 - 00:29

AMD A10-7850K APU with Radeon(TM) R7 Graphics, Linux 4.18.7-rt5 (Profile)

Latency plot of system in rack #2, 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
Characteristics of the 20 highest latencies:
System rack2slot7.osadl.org (updated Tue Jul 23, 2019 12:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
311372128103,0sleep10-21swapper/107:05:401
316092118105,0sleep30-21swapper/307:07:063
317142116104,0sleep20-21swapper/207:08:252
315042115104,0sleep00-21swapper/007:05:430
3196499240,0cyclictest1946-21nscd10:42:392
3195399191,0cyclictest0-21swapper/109:37:211
111190,0rcu_preempt0-21swapper/111:59:041
3196499180,0cyclictest12022-21diskmemload12:29:212
3196499180,0cyclictest12022-21diskmemload10:13:202
3195399181,0cyclictest0-21swapper/111:37:561
3195399181,0cyclictest0-21swapper/110:04:511
111180,0rcu_preempt9-21ksoftirqd/007:10:320
111180,0rcu_preempt35-21ksoftirqd/209:05:412
111180,0rcu_preempt0-21swapper/008:10:310
431170,0ktimersoftd/30-21swapper/309:55:063
31970991717,0cyclictest431ktimersoftd/312:07:243
31970991717,0cyclictest431ktimersoftd/312:03:323
31970991717,0cyclictest431ktimersoftd/310:13:493
31970991716,0cyclictest0-21swapper/310:48:583
3197099170,0cyclictest5953-21latency_hist12:25:293
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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