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2023-01-31 - 10:35

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #a, slot #8

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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x86 Intel Atom E3940 @1600 MHz, Linux 5.10.41-rt42 (Profile)

Latency plot of shadow in rack #a, slot #8
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 100 highest latencies:
System rackaslot8s.osadl.org (updated Tue Jan 31, 2023 00:45:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
313522165151,8sleep30-21swapper/319:05:203
324782157105,28sleep20-21swapper/219:07:362
323802156101,30sleep00-21swapper/019:06:220
324602154101,28sleep10-21swapper/119:07:221
131472750,3sleep30-21swapper/300:16:473
90912560,14sleep30-21swapper/323:40:233
90912560,14sleep30-21swapper/323:40:223
325782490,1sleep20-21swapper/200:03:262
238492480,2sleep00-21swapper/000:29:010
311642470,1sleep00-21swapper/021:20:250
509994413,17cyclictest20523-21sh22:47:162
121482430,4sleep334-21ksoftirqd/321:34:243
50999421,6cyclictest17211-21ssh23:48:032
509994212,17cyclictest27866-21sh23:26:012
506994223,17cyclictest19745-21diskmemload21:31:170
50699421,3cyclictest19745-21diskmemload23:57:200
50699411,2cyclictest0-21swapper/023:11:280
50999390,37cyclictest0-21swapper/221:15:202
50999390,37cyclictest0-21swapper/221:15:192
50999371,1cyclictest0-21swapper/222:53:422
50999370,1cyclictest0-21swapper/222:42:322
509993620,14cyclictest0-21swapper/223:32:162
50699362,9cyclictest10039-21snmpd23:45:170
506993619,14cyclictest28562-21ssh00:33:410
506993619,14cyclictest28562-21ssh00:33:400
506993613,4cyclictest6162-21sh21:27:550
50699361,32cyclictest0-21swapper/022:14:590
50699361,1cyclictest0-21swapper/021:19:560
50699361,1cyclictest0-21swapper/021:19:550
50699361,19cyclictest0-21swapper/023:41:080
50699361,19cyclictest0-21swapper/023:41:070
506993611,6cyclictest20719-21expr22:15:200
50699360,26cyclictest0-21swapper/000:06:160
509993513,19cyclictest9351-21systemd-journal00:20:002
50999350,1cyclictest0-21swapper/222:35:362
50699357,11cyclictest20599-21unixbench_multi23:50:340
50699351,1cyclictest0-21swapper/022:51:160
50699351,1cyclictest0-21swapper/000:01:380
50699348,6cyclictest3430-21kernelversion20:30:230
506993420,12cyclictest0-21swapper/022:46:550
50699341,31cyclictest0-21swapper/021:10:330
50699341,30cyclictest19745-21diskmemload21:51:180
506993412,3cyclictest2170-21sh23:00:520
50699341,1cyclictest0-21swapper/023:25:060
506993410,5cyclictest10317-21seq22:05:040
506993410,5cyclictest10317-21seq22:05:030
50699340,1cyclictest0-21swapper/023:34:340
509993325,6cyclictest1914-1kworker/u9:121:24:472
50999331,30cyclictest0-21swapper/221:26:432
50999331,1cyclictest0-21swapper/221:51:462
50799330,30cyclictest5182-21ssh21:26:211
50699331,30cyclictest0-21swapper/022:55:410
50699331,1cyclictest0-21swapper/022:23:560
509993213,16cyclictest4613-21sh23:04:332
50999321,28cyclictest20528-21sh23:20:022
50799321,28cyclictest18553-21runrttasks23:17:311
50799320,29cyclictest5627-21ssh00:09:511
506993223,7cyclictest13802-21cstates20:55:190
506993223,7cyclictest0-21swapper/022:35:370
326412320,1chrt0-21swapper/022:26:390
51099313,25cyclictest2652-21apt-config20:30:013
50999319,19cyclictest10764-21awk20:45:312
509993122,7cyclictest0-21swapper/223:39:072
50999311,23cyclictest0-21swapper/222:26:142
50999311,1cyclictest0-21swapper/222:58:102
50999311,1cyclictest0-21swapper/222:10:142
509993110,18cyclictest15936-21expr21:00:182
50799311,28cyclictest0-21swapper/122:29:231
50799310,28cyclictest1929-21sh23:33:101
50799310,28cyclictest10437-21taskset22:36:581
50699312,9cyclictest55150irq/140-enp3s0-00:10:180
510993022,5cyclictest27067-21ssh00:31:283
510993022,5cyclictest27067-21ssh00:31:273
510993022,5cyclictest19745-21diskmemload23:32:053
51099301,27cyclictest19745-21diskmemload21:28:563
51099300,28cyclictest1531-21awk23:00:293
51099300,27cyclictest9791-21ssh00:14:043
51099300,27cyclictest8838-21chrt23:08:203
50999308,5cyclictest24072-21seq23:55:122
50999308,19cyclictest13058-21cat21:35:192
50999306,6cyclictest28691-21grep20:15:192
50999305,5cyclictest13617-21grep19:40:182
509993023,4cyclictest22014-21ssh23:52:342
509993019,9cyclictest55450irq/143-enp3s0-00:06:152
509993012,15cyclictest4647-21sh21:59:212
509993010,17cyclictest14212-21sh22:08:452
509993010,17cyclictest14212-21sh22:08:442
50999300,28cyclictest0-21swapper/221:33:382
50999300,1cyclictest23059-21ssh22:17:072
507993023,5cyclictest11433-21sh23:42:031
507993023,5cyclictest11433-21sh23:42:021
50799301,26cyclictest26353-21ssh22:53:251
50699302,7cyclictest11336-21apt-get19:35:170
50699302,4cyclictest22605-21apt-get21:45:040
506993023,5cyclictest19745-21diskmemload23:20:110
50699301,9cyclictest18024-21apt-get21:40:190
50699301,11cyclictest7035-21apt-get19:25:170
51099290,26cyclictest19745-21diskmemload22:22:363
51099290,26cyclictest15477-21ssh00:20:163
50999299,18cyclictest8215-21cron23:44:552
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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