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2024-07-27 - 04:18

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, 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 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Data to construct the above plot have been generated using the RT test utility cyclictest.

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 50 highest latencies:
System rack2slot7s.osadl.org (updated Sat Jul 27, 2024 00:42:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
786922997668,4cyclictest0-21swapper/100:16:181
786923996756,6cyclictest0-21swapper/223:01:172
786921995417,20cyclictest0-21swapper/019:41:110
786921995223,8cyclictest357-21mta-sts-daemon21:48:470
786921995142,5cyclictest895253-21fschecks_count22:36:030
786922995044,3cyclictest0-21swapper/123:40:011
786922995044,3cyclictest0-21swapper/123:40:011
786921995033,14cyclictest339-21dbus-daemon22:06:210
786921995031,12cyclictest789478-21ntpq19:16:100
78692399491,43cyclictest834396-21ssh21:21:062
786922994835,8cyclictest28-21ksoftirqd/100:21:081
786923994739,5cyclictest791657-21systemd-run19:25:002
786922994737,5cyclictest0-21swapper/123:01:081
786921994741,3cyclictest0-21swapper/021:20:000
786923994637,5cyclictest0-21swapper/223:10:002
786921994616,18cyclictest0-21swapper/019:56:100
786922994537,3cyclictest0-21swapper/123:05:571
78692299446,30cyclictest928546-21ssh23:16:161
786922994436,5cyclictest1-21systemd22:50:011
786921994428,12cyclictest828796-21ssh21:15:000
786923994333,7cyclictest967781-21latency_hist00:05:022
786923994333,7cyclictest967781-21latency_hist00:05:022
786922994332,8cyclictest3586050-21snmpd23:22:351
786921994333,6cyclictest0-21swapper/021:40:020
786921994328,12cyclictest983819-21aten_r2power_po00:25:570
786921994327,10cyclictest980792-21ntpq00:21:150
786921994324,16cyclictest893512-21sh22:33:400
786921994323,11cyclictest808298-21ntpq20:16:110
786923994234,5cyclictest911650-21cut22:56:052
786923994234,5cyclictest911650-21cut22:56:052
786923994232,5cyclictest843320-21timerandwakeup21:31:512
786923994215,6cyclictest171rcu_preempt20:26:132
78692399421,4cyclictest171rcu_preempt20:16:092
786921994232,7cyclictest339-21dbus-daemon00:01:320
786921994232,7cyclictest339-21dbus-daemon00:01:320
786921994232,5cyclictest976851-21ntpq00:16:130
786921994231,5cyclictest795740-21ntpq19:36:100
786921994231,5cyclictest795740-21ntpq19:36:100
786921994230,6cyclictest973182-21ntpq00:11:160
78692199422,34cyclictest850962-21ssh21:41:150
786921994219,19cyclictest962311-21sh23:57:250
786921994217,7cyclictest957101-21ntp_states23:51:130
786921994216,7cyclictest931241-21sh23:20:080
786923994132,6cyclictest3054060-21cups-browsed22:20:002
78692299415,26cyclictest863182-21ssh21:56:151
786922994132,6cyclictest992418-21unixbench-2d00:36:211
786922994132,6cyclictest943215-21cron23:35:001
786922994130,8cyclictest794779-21sh19:35:001
786922994130,8cyclictest794779-21sh19:35:001
786921994133,5cyclictest845180-21sh21:35:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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