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2026-09-05 - 18:06

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #4

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 here to display the system's profile data or here to proceed to next system.
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 highest latencies:
System rack9slot4s (updated Sat Sep 05, 2026 12:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7219912635,7cyclictest0-21swapper/007:25:090
7229912571208,31cyclictest876-21hostname07:25:121
7229912291202,21cyclictest24605-21smartctl09:50:221
5642646601,30sleep10-21swapper/107:23:581
3082512465,32sleep00-21swapper/007:21:170
72199232210,19cyclictest0-21swapper/009:50:210
118612910,9sleep072199cyclictest10:40:300
129642810,5sleep1201rcuc/110:45:181
300102750,5sleep0111rcuc/010:05:130
33362480,4sleep13333-21fschecks_count07:30:041
283132400,4sleep0111rcuc/012:50:250
722993816,6cyclictest22-21ksoftirqd/108:05:161
72199371,6cyclictest11265-21ls12:05:290
72199371,14cyclictest14330-21unixbench_multi07:55:300
72199361,14cyclictest7926-21cut09:05:230
72199361,14cyclictest31853-21ls10:10:150
72199361,14cyclictest18572-21ntp_offset12:25:230
72199361,13cyclictest26279-21mailstats12:45:270
721993610,6cyclictest17541-21run-parts09:30:280
259012361,31sleep125905-21irqstats12:45:211
722993515,6cyclictest22-21ksoftirqd/112:40:051
72199356,13cyclictest3814-21df07:30:150
721993513,6cyclictest6893-21/usr/sbin/munin11:55:160
72199351,15cyclictest9324-21expr09:10:140
72199351,14cyclictest24274-21/usr/sbin/munin11:15:180
72199351,13cyclictest20874-21taskset11:05:280
92612340,9sleep072199cyclictest07:45:000
87792341,5sleep08936-21cat10:35:130
84342341,30sleep18435-21sshd10:34:021
722993415,5cyclictest22-21ksoftirqd/110:40:191
722993412,5cyclictest81rcu_preempt12:30:001
722993411,8cyclictest2874-21sendmail-mta09:15:451
72199342,13cyclictest5892-21irqstats09:00:220
721993411,6cyclictest12549-21/usr/sbin/munin07:50:290
721993410,6cyclictest31951-21/usr/sbin/munin11:35:230
134492341,5sleep113456-21diskstats07:55:151
72299339,8cyclictest22-21ksoftirqd/107:50:301
72299338,5cyclictest40250irq/92-i91512:00:281
722993314,6cyclictest22-21ksoftirqd/112:19:521
72299331,28cyclictest2221-21cron10:25:001
72299331,15cyclictest0-21swapper/110:59:011
72199334,11cyclictest0-21swapper/010:54:310
72199332,14cyclictest12577-21wget10:45:120
721993311,6cyclictest2701-21users08:50:310
72199331,14cyclictest7308-21perl10:30:200
72199331,14cyclictest28094-21/usr/sbin/munin10:00:130
721993310,6cyclictest32573-21/usr/sbin/munin08:45:190
721993310,6cyclictest24279-21wc12:40:260
721993310,6cyclictest10269-21/usr/sbin/munin07:45:280
72299329,5cyclictest40250irq/92-i91510:10:261
72299328,5cyclictest40250irq/92-i91508:20:251
722993211,6cyclictest22-21ksoftirqd/111:50:291
72199329,5cyclictest23676-21runrttasks09:47:200
72199328,7cyclictest9343-21tr12:00:290
72199326,6cyclictest15651-21iostat08:00:200
72199323,25cyclictest0-21swapper/008:05:210
72199322,8cyclictest15690-21cron12:20:000
72199322,14cyclictest11565-21gdbus08:22:110
721993219,9cyclictest17450-21unixbench_singl10:55:300
72199321,4cyclictest6310-21/usr/sbin/munin07:35:250
72199321,4cyclictest13789-21runrttasks12:14:480
72199321,15cyclictest0-21swapper/009:44:370
72199321,14cyclictest13314-21/usr/sbin/munin09:20:160
72199321,13cyclictest15106-21fschecks_time09:25:170
72199321,11cyclictest19656-21wget12:30:130
721993210,4cyclictest21745-21cstates12:35:140
49402322,26sleep011565-21gdbus08:58:180
220932325,5sleep00-21swapper/011:10:140
105762321,5sleep110671-21users07:45:321
72299318,6cyclictest3534-21kworker/1:212:50:171
72299318,6cyclictest3534-21kworker/1:208:27:551
72299316,5cyclictest40250irq/92-i91509:40:201
72299311,12cyclictest0-21swapper/112:10:191
72199311,9cyclictest0-21swapper/010:15:380
72199311,4cyclictest1495-21/usr/sbin/munin11:40:240
72199311,13cyclictest5488-21processes11:50:260
72199311,13cyclictest28116-21uname11:25:210
72199311,12cyclictest4413-21seq10:21:110
72199311,11cyclictest28555-21fschecks_count08:35:160
230322311,5sleep10-21swapper/112:38:071
228292311,26sleep122912-21memory09:45:221
72299308,8cyclictest22-21ksoftirqd/109:02:501
72299307,6cyclictest3534-21kworker/1:207:35:161
722993020,6cyclictest16058-21sh10:54:591
72299301,14cyclictest0-21swapper/111:27:301
72199309,6cyclictest0-21swapper/011:24:380
72199308,5cyclictest3286-21runrttasks09:35:510
721993020,6cyclictest20703-21wget08:15:100
72199301,15cyclictest25280-21ntp_states08:25:260
72199301,13cyclictest31177-21/usr/sbin/munin08:40:290
72199301,12cyclictest5537-21iostat_ios10:25:190
72199301,12cyclictest27517-21chrt09:58:150
222122301,25sleep10-21swapper/111:10:171
72299298,6cyclictest40250irq/92-i91511:59:011
72299297,5cyclictest40250irq/92-i91511:05:161
72299297,4cyclictest40250irq/92-i91508:55:221
72299296,6cyclictest3534-21kworker/1:208:30:161
72299295,5cyclictest81rcu_preempt08:11:341
72299291,8cyclictest891-21cpuspeed_turbos11:40:131
72199295,5cyclictest30057-21cat11:30:210
72199293,12cyclictest0-21swapper/011:47:450
72199293,11cyclictest0-21swapper/009:17:230
72199292,21cyclictest27162-21ntp_states08:30:270
66412291,5sleep10-21swapper/110:29:561
187932291,5sleep00-21swapper/008:10:030
163642291,5sleep10-21swapper/108:00:521
144932291,5sleep10-21swapper/109:24:361
72299289,5cyclictest40250irq/92-i91512:31:491
72299287,5cyclictest40250irq/92-i91509:25:281
72299286,6cyclictest3534-21kworker/1:208:40:171
72299286,6cyclictest1780-21kworker/1:011:38:151
72299285,6cyclictest1780-21kworker/1:011:20:201
72299285,5cyclictest40250irq/92-i91508:45:191
72299282,8cyclictest9321-21cstates09:10:141
72299282,8cyclictest27872-21/usr/sbin/munin10:00:241
72299282,22cyclictest8893-21sleep09:10:011
722992818,6cyclictest19345-21head11:00:271
72299281,15cyclictest0-21swapper/108:36:531
40942281,5sleep10-21swapper/111:46:421
166582281,5sleep00-21swapper/012:20:260
72299274,17cyclictest29683-21diskstats11:30:151
72299273,6cyclictest8179-21sh07:40:261
72299271,8cyclictest11533-21taskset12:05:511
31082274,5sleep122-21ksoftirqd/108:53:561
72299261,7cyclictest9291-21iostat_ios10:35:211
72299261,6cyclictest1437-21grep10:15:171
72199261,12cyclictest0-21swapper/011:00:150
311612261,4sleep10-21swapper/110:06:581
252692261,4sleep10-21swapper/111:18:041
219792261,4sleep10-21swapper/108:15:461
722992510,12cyclictest0-21swapper/112:20:251
72299245,5cyclictest40250irq/92-i91509:30:171
72299242,17cyclictest18451-21/usr/sbin/munin09:35:311
722992415,5cyclictest27126-21ls09:55:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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