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2023-01-29 - 06:39

x86 Intel Xeon E3-1220L V2 @2300 MHz, Linux 4.4.229-rt200 (Profile)

Latency plot of system in rack #1, 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 -n -a -t3 -p99 -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 rack1slot2.osadl.org (updated Sun Jan 29, 2023 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
191640,0ktimersoftd/120505-21perf18:26:511
2741224535,0sleep20-21swapper/218:24:522
2753423928,0sleep30-21swapper/318:26:213
2755523127,0sleep00-21swapper/018:26:340
276669988,0cyclictest24075-21awk23:32:290
28005070,0irq/28-eth0-rx-28178-21kthreadcore20:17:233
276669974,0cyclictest28353-21munin-run20:57:010
276669974,0cyclictest28353-21munin-run20:57:010
4160,0ktimersoftd/00-21swapper/021:15:100
35160,0ktimersoftd/30-21swapper/321:15:103
339960,0migration/39719-21munin-node23:42:203
339960,0migration/37487-21sh22:27:413
339960,0migration/323774-21sh22:22:083
339960,0migration/321440-21sh22:52:573
339960,0migration/321185-21gltestperf19:52:173
339960,0migration/317056-21sh21:22:583
339960,0migration/311592-21munin-node22:12:273
329960,0watchdog/39652-21perf18:37:013
329960,0watchdog/331401-21df19:37:173
329960,0watchdog/327406-21rm22:57:243
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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