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2021-01-19 - 06:03

VIA Nano X2 L4050 @ 1.4 GHz, Linux 3.18.36-rt38 (Profile)

Latency plot of system in rack #3, slot #4
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
Characteristics of the 50 highest latencies:
System rack3slot4.osadl.org (updated Fri Dec 21, 2018 12:43:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32101995938,15cyclictest15797-21date10:35:130
103832540,4sleep010384-21basename11:09:520
3210199511,5cyclictest14785-21diskstats11:14:560
3210199491,32cyclictest2311-21missed_timers07:15:110
32101994733,4cyclictest0-21swapper/010:50:120
32101994732,5cyclictest24491-21ssh09:25:410
32101994731,7cyclictest439-21runrttasks12:10:190
3210199472,29cyclictest6656-21sshd07:27:110
32101994631,5cyclictest0-21swapper/011:20:160
3210199461,29cyclictest24089-21timerwakeupswit09:25:150
3210199458,32cyclictest37150irq/33-eth010:54:470
3210199452,6cyclictest18867-21missed_timers12:40:030
32101994431,4cyclictest0-21swapper/007:55:230
32101994429,5cyclictest5974-21latency08:55:080
32101994424,5cyclictest0-21swapper/010:25:040
3210199442,37cyclictest4809-21ssh11:42:210
3210199441,6cyclictest20029-21timerandwakeup09:20:150
3210199441,4cyclictest0-21swapper/007:40:040
3210199441,39cyclictest0-21swapper/008:10:170
3210199441,28cyclictest4172-21latency08:50:080
3210199441,27cyclictest3474-21timerwakeupswit11:40:100
32101994412,15cyclictest2430-21ssh09:39:510
32101994329,4cyclictest0-21swapper/011:54:510
3210199431,5cyclictest0-21swapper/011:20:040
3210199431,5cyclictest0-21swapper/011:05:120
3210199431,27cyclictest19460-21latency10:00:050
32101994229,4cyclictest10638-21diskmemload09:45:500
32101994229,4cyclictest0-21swapper/008:25:280
32101994228,5cyclictest0-21swapper/007:50:170
32101994226,6cyclictest31668-21latency09:35:060
32101994225,7cyclictest13110-21latency07:45:100
32101994223,7cyclictest27772-21timerandwakeup11:30:110
3210199421,7cyclictest10032-21timerwakeupswit09:05:160
3210199421,6cyclictest27846-21ps10:10:100
32101994129,4cyclictest0-21swapper/008:00:290
32101994123,4cyclictest22963-21diskstats10:44:570
3210199412,27cyclictest7285-21iostat09:45:040
32101994121,11cyclictest0-21swapper/008:15:530
3210199412,10cyclictest0-21swapper/010:04:490
3210199402,7cyclictest5860-21/usr/sbin/munin07:25:110
3210199402,33cyclictest0-21swapper/008:21:030
32101994022,3cyclictest27632-21ssh12:10:100
3210199402,23cyclictest17038-21/usr/sbin/munin07:55:180
3210199401,4cyclictest0-21swapper/009:10:190
3210199401,3cyclictest17941-21ssh11:59:210
3210199401,33cyclictest0-21swapper/007:35:100
32102993913,7cyclictest28168-21unixbench_multi09:30:161
3210199399,18cyclictest0-21swapper/007:20:120
3210199393,17cyclictest0-21swapper/007:10:170
32101993924,6cyclictest920-21switchtime08:40:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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