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2022-10-04 - 02:44

x86 Intel Celeron N3350 @1100 MHz, Linux 5.10.90-rt60 (Profile)

Latency plot of system in rack #c, 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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackcslot4.osadl.org (updated Mon Oct 03, 2022 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17588992285206,27sleep00-21swapper/007:06:030
17589392258183,59sleep10-21swapper/107:06:291
175937799214208,4cyclictest1751435-21kworker/u8:208:10:301
172099720,23rtkit-daemon1719-21rtkit-daemon09:39:121
17971482630,4sleep11797151-21awk08:40:321
172099500,3rtkit-daemon1719-21rtkit-daemon11:23:221
172099500,3rtkit-daemon1719-21rtkit-daemon07:31:340
175937299480,46cyclictest243-21jbd2/mmcblk0p2-09:20:060
172099480,4rtkit-daemon1719-21rtkit-daemon11:28:371
172099470,21rtkit-daemon1719-21rtkit-daemon09:46:381
172099460,4rtkit-daemon1719-21rtkit-daemon07:56:591
19123132430,3chrt0-21swapper/011:57:430
175937799420,40cyclictest243-21jbd2/mmcblk0p2-10:30:431
175937299421,8cyclictest1900865-21sh11:40:000
175937299420,40cyclictest243-21jbd2/mmcblk0p2-08:30:380
175937299401,10cyclictest1-21systemd10:05:010
172099390,3rtkit-daemon0-21swapper/110:25:241
172099390,3rtkit-daemon0-21swapper/108:08:111
172099390,3rtkit-daemon0-21swapper/007:43:210
172099380,4rtkit-daemon1719-21rtkit-daemon09:05:291
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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