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2024-03-03 - 12:53
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
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 highest latencies:
System rack3slot6 (updated Sun Mar 03, 2024 00:44:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2798821090,4chrt27983-21aten2.4_r3power20:40:220
1001221070,4chrt28-21kcompactd019:50:400
175092920,4chrt17510-21unixbench-2d20:10:430
41772840,4chrt4175-21sed22:30:450
91962830,4sleep09193-21tail22:45:380
59532770,4chrt5951-21memory19:40:330
91312750,4chrt9133-21turbostat00:15:000
274012750,4chrt27399-21threads19:10:420
236782730,4chrt23677-21idleruntime23:25:310
184872730,4chrt18488-21sendmail-msp00:40:010
229882690,4sleep022987-21uname20:25:330
2575026741,17sleep00-21swapper/019:05:430
26429996338,15cyclictest26910-21apt-get23:35:220
28992620,4sleep02901-21sort23:55:420
2642999555,40cyclictest10404-21apt-get22:50:260
2642999524,41cyclictest2183-21python322:25:390
132782520,4sleep013281-21vmstat22:55:440
2642999503,19cyclictest19913-21memory21:45:360
2642999497,18cyclictest24776-21apt-get22:00:210
26429994932,11cyclictest2600-21munin-run21:00:010
26429994917,11cyclictest3069-21apt-get21:00:210
208842492,8sleep020900-21grep20:20:320
132282493,8sleep013233-21diskstats20:00:290
26429994826,17cyclictest14-21ksoftirqd/020:07:070
26429994823,15cyclictest13202-21apt-get00:25:240
2642999473,37cyclictest11441-21diskstats00:20:370
2642999473,15cyclictest31158-21needreboot23:45:350
26429994730,10cyclictest6012-21diskstats00:05:420
2642999468,17cyclictest14000-21apt-get23:00:220
2642999466,18cyclictest15731-21apt-get21:35:200
2642999465,23cyclictest28773-21apt-get23:40:220
2642999463,13cyclictest12149-21apt-get21:25:220
2642999463,12cyclictest8542-21apt-get21:15:210
26429994631,10cyclictest5774-21python322:35:410
26429994622,14cyclictest11093-21apt-get19:55:210
26429994613,29cyclictest0-21swapper/022:10:240
2642999457,16cyclictest3564-21apt-get19:35:220
2642999454,10cyclictest22231-21ntp_states23:20:390
2642999453,36cyclictest30895-21ntp_states22:15:390
26429994530,9cyclictest22959-21/usr/sbin/munin21:55:410
26429994530,10cyclictest17927-21apt-get23:10:190
26429994529,10cyclictest9287-21/usr/sbin/munin00:15:380
26429994518,18cyclictest26115-21apt-get20:35:250
2642999447,16cyclictest26568-21apt-get22:05:200
2642999447,16cyclictest14988-21apt-get00:30:230
2642999447,15cyclictest17592-21apt-get21:40:220
2642999446,17cyclictest6731-21apt-get21:10:230
2642999446,16cyclictest13940-21apt-get21:30:210
2642999445,31cyclictest4865-21apt-get21:05:230
26429994429,10cyclictest1761-21apt-get19:30:210
2642999433,34cyclictest30225-21runrttasks19:18:230
2642999433,17cyclictest5525-21latency_hist00:05:000
2642999433,11cyclictest7517-21df19:45:240
26429994326,11cyclictest392-21irqstats19:25:360
2642999432,36cyclictest25118-21seq23:30:220
2642999432,35cyclictest16091-21/usr/sbin/munin23:05:350
2642999427,15cyclictest24321-21apt-get20:30:220
2642999423,34cyclictest19719-21/usr/sbin/munin23:15:370
2642999422,35cyclictest7341-21/usr/sbin/munin22:40:310
2642999422,15cyclictest1169-21sort23:50:450
2642999416,15cyclictest21174-21apt-get21:50:200
2642999413,9cyclictest18771-21irqstats20:15:320
2642999413,16cyclictest11029-21/usr/sbin/munin21:20:340
26429994114,18cyclictest29771-21apt-get20:45:230
2642999403,30cyclictest32700-21ntp_states22:20:350
2642999397,24cyclictest30612-21apt-get19:20:200
2642999383,12cyclictest31877-21df20:50:300
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*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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