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2022-12-05 - 00:05

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #7

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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ARM Freescale i.MX6 Quad @996 MHz, Linux 5.15.26-xenomai (Profile)

Latency plot of shadow in rack #b, slot #7
Note that this system runs a non-RT kernel.
Data to construct the above plot have been generated using the RT test utility cyclictest.
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 rackbslot7s (updated Sun Dec 04, 2022 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
161812884823,8813sleep129292-21kworker/1:010:48:521
304372877512,8730sleep129292-21kworker/1:011:36:531
217102182519,1788sleep021711-21ntp_states09:23:160
7254244812,420sleep37256-21sshd08:37:533
10540240576,201sleep110582-21cut12:17:421
10540240576,201sleep110582-21cut12:17:421
13954237918,348sleep114018-21latency10:43:071
13605234418,258sleep313639-21ps07:13:153
22546226311,113sleep10-21swapper/109:27:451
17507224112,213sleep017638-21awk10:53:230
30291223831,190sleep130353-21fschecks_time08:08:031
299122238112,107sleep10-21swapper/108:07:431
20785223812,213sleep020852-21sed07:37:460
11902223438,181sleep112006-21date10:37:461
1160221715,152sleep11186-21awk11:47:421
14826221573,16sleep10-21swapper/109:02:461
14826221573,16sleep10-21swapper/109:02:461
7899221232,57sleep10-21swapper/108:38:151
28052221264,66sleep1301-21in:imuxsock07:58:431
6965220515,75sleep16994-21modprobe08:37:431
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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