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2022-05-25 - 07:54

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 50 highest latencies:
System rack1slot2.osadl.org (updated Wed May 25, 2022 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
173024738,0sleep20-21swapper/218:53:502
199124334,0sleep10-21swapper/118:56:491
186223627,0sleep30-21swapper/318:55:233
172823026,0sleep00-21swapper/018:53:480
35170,0ktimersoftd/30-21swapper/323:27:403
339960,0migration/32313-21sh21:26:303
339960,0migration/319321-21kthreadcore21:52:393
339960,0migration/317558-21munin-node22:27:343
339960,0migration/311321-21sh23:51:063
329960,0watchdog/311749-21ssh23:16:063
28015060,0irq/29-eth0-tx-5666-21munin-node20:07:440
28005060,0irq/28-eth0-rx-25263-21fschecks_count00:17:353
28005060,0irq/28-eth0-rx-23369-21irqrtprio22:47:393
28005060,0irq/28-eth0-rx-11373-21memory20:52:463
21769966,0cyclictest0-21swapper/220:57:402
21769960,0cyclictest0-21swapper/200:09:102
21699965,0cyclictest4702-21cut22:02:391
21639966,0cyclictest12492-21diskmemload22:27:430
21639963,0cyclictest0-21swapper/021:52:230
149960,0migration/024100-21sh23:02:580
149960,0migration/014261-21kthreadcore22:42:400
8315050,0irq/26-0000:00:26939-21crond20:22:232
8315050,0irq/26-0000:00:12971-21sed19:27:232
339950,0migration/38552-21fschecks_count22:57:363
339950,0migration/35097-21kthreadcore22:02:403
339950,0migration/35057-21timerandwakeup21:42:493
339950,0migration/33899-21kernelversion18:57:413
339950,0migration/33481-21aten2_r1power_p22:37:333
339950,0migration/331659-21irqrtprio00:02:393
339950,0migration/328631-21sh21:03:243
339950,0migration/325074-21kthreadcore20:17:413
339950,0migration/323807-21cpuspeed_turbos20:42:353
339950,0migration/317282-21taskset23:02:253
339950,0migration/316602-21latency_hist19:07:233
339950,0migration/313143-21kthreadcore20:32:413
339950,0migration/312071-21kthreadcore21:47:403
339950,0migration/311959-21kthreadcore19:47:403
329950,0watchdog/3628-21sh23:42:503
329950,0watchdog/34915-21ps20:47:593
329950,0watchdog/331434-21fschecks_count19:17:353
329950,0watchdog/324641-21ssh23:39:263
329950,0watchdog/313998-21iostat20:12:393
329950,0watchdog/312816-21munin-run19:27:233
329950,0watchdog/30-21swapper/323:07:343
329950,0watchdog/30-21swapper/319:12:233
28015050,0irq/29-eth0-tx-8572-21taskset00:24:132
28015050,0irq/29-eth0-tx-8129-21munin-node22:57:422
28015050,0irq/29-eth0-tx-4754-21uname21:07:442
28015050,0irq/29-eth0-tx-23574-21munin-node20:42:480
28015050,0irq/29-eth0-tx-2011-21grep22:52:392
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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