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2025-05-09 - 06:06

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 100 highest latencies:
System rack5slot3s.osadl.org (updated Fri May 09, 2025 00:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
318412238164,25sleep30-21swapper/319:07:293
317492232162,56sleep00-21swapper/019:06:170
317512218188,20sleep20-21swapper/219:06:192
317552204167,24sleep10-21swapper/119:06:221
2706821370,5sleep03212799cyclictest23:50:140
2053621100,3sleep33214299cyclictest22:20:213
3213899108105,2cyclictest0-21swapper/220:59:172
3213899107104,2cyclictest0-21swapper/223:48:022
4022640,4sleep13213399cyclictest22:50:141
96152590,6sleep03212799cyclictest23:10:160
307132480,1sleep30-21swapper/321:30:193
262472420,1sleep30-21swapper/321:20:203
32127993912,13cyclictest2242-21awk22:55:020
32138993330,2cyclictest0-21swapper/200:38:462
3213399321,23cyclictest0-21swapper/123:35:231
3212799326,13cyclictest4968-21memory21:45:200
3212799315,11cyclictest3265-21/usr/sbin/munin22:55:190
303102300,2sleep00-21swapper/020:15:220
3213899291,11cyclictest32623-21/usr/sbin/munin22:50:212
3213399281,18cyclictest17586-21diskstats22:15:151
3213399281,18cyclictest17586-21diskstats22:15:151
3212799288,16cyclictest20805-21diskmemload21:18:140
3212799283,11cyclictest12050irq/123-ahci[0000:30:010
3212799283,11cyclictest12050irq/123-ahci[0000:30:010
3212799281,18cyclictest13266-21cat23:20:010
3212799274,11cyclictest3237-21awk20:30:010
32127992711,6cyclictest6350-21ntp_states00:15:240
32127992710,3cyclictest26031-21/usr/sbin/munin22:35:220
3212799270,12cyclictest20206-21perf19:55:010
3213899261,12cyclictest0-21swapper/223:18:432
3213399264,19cyclictest848-21sssd_nss00:35:201
32133992613,10cyclictest4635-21systemd-journal23:00:021
3212799268,15cyclictest1021-21awk20:25:010
3212799265,10cyclictest13154-21switchtime00:30:260
3212799263,13cyclictest10040-21/usr/sbin/munin20:45:190
3213899253,8cyclictest21402-21latency_hist22:25:012
3213399251,4cyclictest14621-21proc_pri23:20:281
3213399251,4cyclictest14621-21proc_pri23:20:281
3213399250,6cyclictest0-21swapper/121:10:301
3213399250,6cyclictest0-21swapper/121:10:301
3212799255,3cyclictest12050irq/123-ahci[0021:30:010
3212799255,10cyclictest26246-21irqstats21:20:200
3212799254,9cyclictest31442-21/usr/sbin/munin22:45:210
3212799253,9cyclictest0-21swapper/021:00:200
3214299241,6cyclictest0-21swapper/300:15:303
3213899242,10cyclictest0-21swapper/200:23:502
3213899241,5cyclictest0-21swapper/221:45:252
32138992414,3cyclictest12050irq/123-ahci[0023:55:002
3213399244,4cyclictest9246-21runrttasks00:22:331
3213399243,16cyclictest25043-40dnf21:18:151
3213399241,16cyclictest0-21swapper/122:30:311
3213399240,16cyclictest0-21swapper/100:06:191
3212799243,8cyclictest0-21swapper/022:10:190
3212799242,18cyclictest2316-21fschecks_count21:40:150
3212799242,12cyclictest0-21swapper/023:06:340
3212799242,11cyclictest20419-21/usr/sbin/munin19:55:180
3212799242,10cyclictest32018-21/usr/sbin/munin21:35:240
3212799241,6cyclictest0-21swapper/000:10:150
3212799241,10cyclictest31446-21kworker/u8:221:55:240
3213899239,5cyclictest86850irq/129-enp1s0-21:30:172
3213899233,2cyclictest88150irq/134-enp2s0-19:45:022
32133992317,3cyclictest19898-21ntp_states21:05:221
32133992314,3cyclictest0-21swapper/122:21:441
3213399231,3cyclictest12003-21munin-run20:50:021
3213399231,19cyclictest22846-21processes22:25:241
3213399231,19cyclictest15959-21memory22:10:191
3213399231,16cyclictest0-21swapper/122:57:031
3213399231,16cyclictest0-21swapper/119:27:441
3213399231,10cyclictest1143-21unixbench_multi21:35:271
3212799232,9cyclictest14169-21kworker/0:320:59:460
3212799232,11cyclictest21046-21netstat23:35:210
3212799232,11cyclictest19436-21/usr/sbin/munin22:20:110
3212799231,7cyclictest0-21swapper/023:22:020
3212799231,7cyclictest0-21swapper/023:22:020
3212799231,4cyclictest0-21swapper/023:49:240
32127992313,7cyclictest5643-21/usr/sbin/munin20:35:140
3212799230,13cyclictest835-21/usr/sbin/munin00:05:150
3213899228,7cyclictest18220-21kworker/2:120:20:592
3213899227,5cyclictest780-21rngd21:40:212
3213899224,3cyclictest24699-21unixbench-2d21:15:252
3213899222,7cyclictest26684-21cut22:35:182
3213899221,8cyclictest0-21swapper/200:20:002
3213899221,7cyclictest20805-21diskmemload22:40:292
3213899221,3cyclictest88250irq/135-enp2s0-20:44:412
32138992212,7cyclictest21033-21systemd-journal21:10:092
32138992212,7cyclictest21033-21systemd-journal21:10:092
3213899221,13cyclictest0-21swapper/223:20:562
3213899221,13cyclictest0-21swapper/223:20:552
3213899221,12cyclictest0-21swapper/223:14:112
32138992210,5cyclictest86750irq/128-enp1s0-22:55:172
32138992210,4cyclictest86750irq/128-enp1s0-22:15:232
32138992210,4cyclictest86750irq/128-enp1s0-22:15:232
3213399227,13cyclictest14758-21kworker/u8:023:06:501
32133992216,3cyclictest6759-21grep00:15:291
3213399221,18cyclictest564-21cat19:10:161
3213399221,15cyclictest0-21swapper/122:41:261
3212799226,6cyclictest23774-21/usr/sbin/munin23:40:260
3212799225,4cyclictest0-21swapper/022:00:410
3212799221,6cyclictest0-21swapper/021:51:040
32127992213,6cyclictest4594-40dnf19:17:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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