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2023-02-02 - 15:44

x86 Intel Core i5-8265UE @1600 MHz, Linux 5.10.41-rt42 (Profile)

Latency plot of system in rack #a, slot #8
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 rackaslot8.osadl.org (updated Thu Feb 02, 2023 12:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
177682293259,20sleep20-21swapper/207:08:092
178972283252,20sleep10-21swapper/107:09:481
178292281248,22sleep00-21swapper/007:08:540
176562244213,19sleep30-21swapper/307:06:453
80862640,0sleep30-21swapper/310:30:553
76972630,0sleep2271rcuc/210:51:112
152472600,0sleep20-21swapper/212:39:582
59752200,0sleep00-21swapper/010:10:020
99562190,0sleep20-21swapper/209:30:352
300082180,0sleep00-21swapper/012:07:330
142272180,0sleep30-21swapper/312:39:083
24102170,0sleep10-21swapper/109:25:531
301402150,0sleep20-21swapper/211:05:212
242102150,0sleep00-21swapper/008:30:300
187582150,0sleep10-21swapper/110:58:521
1803299141,7cyclictest16752-21ls08:15:270
1803299140,9cyclictest17945-21ps12:20:220
1803299140,11cyclictest16881-21ssh10:16:050
16192140,0sleep00-21swapper/011:08:320
1803299130,9cyclictest27396-21ssh09:41:580
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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