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2024-11-25 - 07:00

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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.
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 50 highest latencies:
System rack5slot3s.osadl.org (updated Mon Nov 25, 2024 00:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
168052243166,24sleep00-21swapper/019:06:320
169342241163,24sleep10-21swapper/119:08:151
170142235161,24sleep20-21swapper/219:09:172
168132203166,24sleep30-21swapper/319:06:403
1013921500,4sleep31717799cyclictest21:18:343
17173991101,107cyclictest0-21swapper/222:53:412
17173999083,6cyclictest0-21swapper/221:06:212
17173996655,3cyclictest0-21swapper/221:37:472
17173996655,3cyclictest0-21swapper/221:37:472
54092630,17sleep10-21swapper/122:20:191
308152600,3sleep030812-21grep22:05:150
279252600,4sleep20-21swapper/223:10:302
243112600,5sleep230-21rcuc/220:35:252
223272550,4sleep1221ktimersoftd/121:45:181
113212470,2sleep10-21swapper/122:35:121
1716199357,13cyclictest16546-21idleruntime-cro00:05:010
141042320,2sleep10-21swapper/120:15:021
1716199302,13cyclictest9657-21awk20:05:020
1716199293,12cyclictest28495-21awk23:15:010
259612280,2sleep30-21swapper/323:06:003
111332280,5sleep341-21ksoftirqd/320:05:243
17177992712,4cyclictest86550irq/126-enp1s0-00:25:103
17173992710,6cyclictest25667-21expr00:25:112
1716799275,11cyclictest5982-21latency23:35:171
1716799271,9cyclictest17148-21cyclictest21:42:191
1717799261,12cyclictest0-21swapper/323:28:533
1716799261,5cyclictest26604-21cpuspeed_turbos23:10:161
1716799260,17cyclictest0-21swapper/122:11:081
111282260,4sleep07-21ksoftirqd/021:20:160
1717799256,6cyclictest0-21swapper/322:15:023
1717799250,5cyclictest0-21swapper/323:52:533
1717799250,5cyclictest0-21swapper/323:52:533
1716799253,3cyclictest86750irq/128-enp1s0-20:05:221
1716799253,14cyclictest86850irq/129-enp1s0-21:50:291
1716799251,6cyclictest0-21swapper/121:16:201
1716799251,5cyclictest0-21swapper/100:27:231
1716799251,3cyclictest0-21swapper/122:02:421
1716799251,16cyclictest86850irq/129-enp1s0-00:10:191
1716799251,16cyclictest0-21swapper/122:58:481
1716799251,15cyclictest0-21swapper/121:34:051
1716799251,12cyclictest0-21swapper/123:58:451
1716199253,3cyclictest0-21swapper/000:21:050
1717799245,3cyclictest12050irq/123-ahci[0021:05:013
1717799241,4cyclictest0-21swapper/321:54:493
17173992410,4cyclictest30-21rcuc/221:10:272
1716799249,3cyclictest9266-21diskstats22:30:181
1716799242,11cyclictest842-21lldpd23:30:361
1716799241,5cyclictest0-21swapper/123:45:121
1716799241,4cyclictest19565-21munin-node19:15:011
1716799241,11cyclictest14378-21ntp_states22:40:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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