You are here: Home / Projects / QA Farm Realtime / Latency plots / 
2020-12-03 - 17:44

Intel(R) Celeron(R) CPU G3900 @ 2.80GHz, Linux 5.4.59-rt36 (Profile)

Latency plot of system in rack #c, slot #5
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
The worst-case latency is about 1.00 times higher under extreme CPU load.
Results of all systems under extreme CPU load are combined on this summary graph.
The worst-case latency is about 1.67 times higher under graphics load.
Results of all systems with accelerated graphics are combined on this summary graph.
Characteristics of the 50 highest latencies:
System rackcslot5.osadl.org (updated Thu Dec 03, 2020 12:43:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
291382380,0sleep029141-21timerandwakeup11:20:120
2118199250,25cyclictest0-21swapper/108:26:171
21181992422,1cyclictest21-21ksoftirqd/110:37:151
2118199240,23cyclictest28925-21meminfo08:50:101
2118199230,22cyclictest25513-21meminfo10:05:081
21181992119,1cyclictest26149-21if_err_ecat107:20:061
2118199210,8cyclictest31997-21apt-get11:30:031
2118199210,20cyclictest30721-21meminfo11:25:081
2118199210,20cyclictest28265-21meminfo07:25:111
2118099211,11cyclictest16335-21kworker/u4:009:30:380
2118099210,2cyclictest4080-21kworker/u4:310:37:170
2118199200,5cyclictest0-21swapper/109:45:071
2118199200,19cyclictest21517-21meminfo12:25:111
21180992019,0cyclictest0-21swapper/008:20:120
2118199194,14cyclictest28334-21kworker/u4:010:29:461
21181991918,1cyclictest21-21ksoftirqd/112:06:141
21181991918,1cyclictest201rcuc/111:05:351
21181991917,1cyclictest21-21ksoftirqd/108:20:041
2118199191,5cyclictest24720-21apt-get12:35:061
21180991919,0cyclictest0-21swapper/012:37:040
2118099191,17cyclictest15054-21/usr/sbin/munin12:10:110
21181991816,1cyclictest21-21ksoftirqd/107:45:011
21181991814,3cyclictest21-21ksoftirqd/110:20:121
21181991814,1cyclictest21-21ksoftirqd/108:45:021
2118199180,8cyclictest0-21swapper/111:45:391
2118199180,4cyclictest16847-21latency_hist12:14:591
2118199180,17cyclictest5748-21meminfo07:50:091
2118199180,17cyclictest24389-21meminfo07:15:101
2118199180,10cyclictest9263-21apt-get11:55:041
2118099186,6cyclictest20859-21apt-get12:25:070
21180991812,4cyclictest6998-21latency_hist07:54:590
2118099180,15cyclictest0-21swapper/010:42:340
2118199174,9cyclictest3463-21diskmemload11:23:441
2118199172,10cyclictest0-21swapper/112:18:101
21181991716,1cyclictest21-21ksoftirqd/112:22:421
21181991716,1cyclictest21-21ksoftirqd/110:55:041
21181991716,1cyclictest201rcuc/109:35:071
21181991716,1cyclictest201rcuc/109:35:061
2118199170,16cyclictest6186-21meminfo09:15:071
2118199170,16cyclictest32157-21meminfo07:35:081
21180991717,0cyclictest0-21swapper/012:06:300
2118099171,15cyclictest14942-21ls10:45:080
2118199162,8cyclictest16354-21ls09:40:161
2118199162,3cyclictest111rcu_preempt10:00:101
2118199162,3cyclictest111rcu_preempt09:05:041
21181991615,1cyclictest68880irq/130-ecat0-r09:59:521
21181991615,1cyclictest21-21ksoftirqd/109:55:011
21181991615,1cyclictest21-21ksoftirqd/109:00:011
21181991615,1cyclictest21-21ksoftirqd/108:00:031
21181991613,2cyclictest21-21ksoftirqd/109:30:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional