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2023-06-07 - 10:41

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 Wed Jun 07, 2023 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
339990,0migration/312588-21munin-node18:06:483
259990,0migration/213400-21taskset18:09:362
149990,0migration/012596-21munin-node18:06:480
19180,0ktimersoftd/16111-21avahi-daemon18:06:481
8315060,0irq/26-0000:00:8786-21munin-run23:21:232
339960,0migration/332090-21munin-node21:06:543
339960,0migration/325473-21sh22:36:123
339960,0migration/312013-21sh20:39:263
28015060,0irq/29-eth0-tx-31632-21munin-node18:46:530
28015060,0irq/29-eth0-tx-23000-21ssh20:46:452
28015060,0irq/29-eth0-tx-20778-21munin-node19:01:580
28015060,0irq/29-eth0-tx-15529-21diskstats21:36:502
28005060,0irq/28-eth0-rx-3939-21perl23:36:463
28005060,0irq/28-eth0-rx-355-21kernelversion20:51:493
28005060,0irq/28-eth0-rx-25136-21perl20:11:493
28005060,0irq/28-eth0-rx-16228-21unixbench_multi20:22:003
28005060,0irq/28-eth0-rx-11607-21sh21:16:423
149960,0migration/031599-21sh20:13:460
149960,0migration/028205-21latency22:16:560
149960,0migration/020662-21aten2_r1power_p21:21:440
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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