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2022-05-26 - 00:58

x86 AMD G-T48L @1400 MHz, Linux 4.4.4-rt11 (Profile)

Latency plot of system in rack #c, slot #3
Data to construct the above plot have been generated using the RT test utility cyclictest.
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 20 highest latencies:
System rackcslot3.osadl.org (updated Fri May 20, 2022 00:43:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81760rcu_preempt30815-21latency_hist22:57:501
81750rcu_preempt15688-21switchtime00:38:150
81740rcu_preempt5008-21ssh00:18:001
81740rcu_preempt17213-21switchtime21:23:131
81740rcu_preempt10826-21latency_hist21:12:491
81740rcu_preempt0-21swapper/021:28:280
81730rcu_preempt5638-21sh23:12:060
81730rcu_preempt1822-21ssh23:03:100
81730rcu_preempt13879-21ssh21:18:031
81720rcu_preempt19284-21sendmail_mailqu23:38:131
81720rcu_preempt19284-21sendmail_mailqu23:38:131
81710rcu_preempt18166-21sh22:31:461
81710rcu_preempt0-21swapper/120:28:031
81700rcu_preempt21632-21ntpq23:43:101
81700rcu_preempt21632-21ntpq23:43:101
81700rcu_preempt0-21swapper/122:16:281
81700rcu_preempt0-21swapper/120:23:051
81700rcu_preempt0-21swapper/021:18:140
81700rcu_preempt0-21swapper/021:15:330
81690rcu_preempt0-21swapper/100:06:051
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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