You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2022-06-27 - 16:39

x86 Intel Xeon E3-1220L V2 @2300 MHz, Linux 4.19.8-rt6 (Profile)

Latency plot of system in rack #4, 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 -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 rack4slot0.osadl.org (updated Mon Jun 27, 2022 12:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
445721510,3sleep11244099cyclictest12:26:421
1039321200,1sleep233-21ksoftirqd/212:31:002
1767121100,1sleep0111rcuc/012:28:120
2380121090,1sleep233-21ksoftirqd/211:08:502
97452820,1sleep19746-21grepconf.sh11:47:181
12441998179,1cyclictest14892-21ipmitool12:35:142
46172800,1sleep233-21ksoftirqd/212:26:432
214002790,1sleep30-21swapper/311:55:533
324292770,0sleep10-21swapper/109:28:171
131382760,1sleep313133-21lspci11:25:463
72712740,1sleep0111rcuc/011:47:000
300202740,0sleep00-21swapper/009:57:060
204132730,0sleep30-21swapper/309:52:253
33132710,0sleep00-21swapper/012:12:050
120742690,0sleep30-21swapper/309:33:213
12440996764,2cyclictest31811-21ipmitool12:15:171
121822630,0sleep10-21swapper/109:47:541
168592600,0sleep00-21swapper/010:53:250
1192425526,9sleep10-21swapper/107:06:491
74062540,3sleep01243999cyclictest10:19:540
123792540,0sleep00-21swapper/011:18:300
46672520,1sleep04669-21bash11:39:260
12442995048,1cyclictest24335-21ipmitool12:25:203
59672450,2sleep11244099cyclictest10:41:201
1192324427,10sleep00-21swapper/007:06:480
1197924328,8sleep20-21swapper/207:07:222
1189424325,10sleep30-21swapper/307:06:283
12439994037,2cyclictest3231-21ipmitool12:30:140
12441993735,1cyclictest11384-21ipmitool12:20:142
12440993735,1cyclictest14870-21ipmitool12:35:141
75952360,0sleep17571-21sshd11:10:381
322122300,0sleep00-21swapper/010:22:440
282352300,1sleep00-21swapper/010:47:250
313582290,1sleep231351-21sshd12:11:362
229892270,0sleep10-21swapper/111:08:461
208932250,1sleep320891-21sshd12:35:543
1244099253,4cyclictest0-21swapper/108:40:071
292342240,0sleep30-21swapper/310:47:313
1243999242,4cyclictest0-21swapper/007:10:360
1243999240,2cyclictest19464-21bash11:55:390
1243999240,1cyclictest0-21swapper/011:30:250
1244199233,2cyclictest0-21swapper/209:03:202
1244099233,2cyclictest0-21swapper/107:27:461
64842220,0sleep00-21swapper/012:01:320
1244199222,2cyclictest0-21swapper/208:41:012
1244099220,4cyclictest0-21swapper/112:10:151
1244099220,3cyclictest0-21swapper/109:20:471
1243999220,1cyclictest0-21swapper/008:22:390
306522210,0sleep30-21swapper/310:51:203
1244199213,2cyclictest33-21ksoftirqd/210:06:082
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional