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2023-02-06 - 14:22

x86 Intel Core i5-6440EQ @2700 MHz, Linux 4.9.47-rt37 (Profile)

Latency plot of system in rack #5, slot #2
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 20 highest latencies:
System rack5slot2.osadl.org (updated Mon Feb 06, 2023 12:44:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
65212192174,13sleep10-21swapper/107:07:261
63862176159,12sleep00-21swapper/007:05:400
66152167149,13sleep30-21swapper/307:08:403
6599210083,12sleep20-21swapper/207:08:262
298372510,0sleep30-21swapper/311:24:183
293572510,0sleep029358-21unixbench_multi07:50:280
283532470,0sleep00-21swapper/010:45:240
692999100,8cyclictest29111-21apt-get11:05:173
692999100,6cyclictest3554-21df_inode10:50:183
163682100,0sleep20-21swapper/211:15:402
69299990,8cyclictest22628-21apt-get08:45:173
69299990,8cyclictest22395-21munin-run08:45:003
69299990,8cyclictest17795-21apt-get09:20:143
69299990,8cyclictest11250-21munin-run12:10:003
69299990,6cyclictest9036-21ntp_states11:30:273
69299980,8cyclictest7011-21apt-get07:10:133
69299980,7cyclictest9537-21ssh10:35:163
69299980,7cyclictest6163-21memory08:10:213
69299980,7cyclictest5810-21fschecks_count12:25:193
69299980,7cyclictest4827-21apt08:10:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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