You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2022-10-04 - 01:43

x86 Intel Core i3-2100T @2500 MHz, Linux 4.14.28-rt23 (Profile)

Latency plot of system in rack #0, slot #0
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 --smi -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Characteristics of the 20 highest latencies:
System rack0slot0.osadl.org (updated Tue Oct 04, 2022 00:45:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2598821860,2sleep42140699cyclictest22:29:194
2598821860,2sleep42140699cyclictest22:29:184
623121850,4sleep42140699cyclictest22:11:314
1788321830,3sleep72142699cyclictest21:22:107
1324921580,1sleep213245-21sshd21:37:452
1324921580,1sleep213245-21sshd21:37:452
2028721550,0sleep40-21swapper/400:12:034
3112221440,0sleep00-21swapper/022:20:570
1701721380,1sleep117018-21grep23:17:331
2961421340,1sleep20-21swapper/223:11:572
1368621240,0sleep70-21swapper/722:15:277
492921200,1sleep44856-21sshd22:39:284
816821190,1sleep233-21ksoftirqd/221:25:272
816821190,1sleep233-21ksoftirqd/221:25:262
2490821190,1sleep424906-21sshd22:47:304
1560121180,0sleep6671rcuc/622:58:066
592521170,0sleep1221rcuc/100:01:511
1460121170,1sleep233-21ksoftirqd/222:14:162
2214121150,0sleep30-21swapper/321:32:023
1720821150,0sleep30-21swapper/322:10:413
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional