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2026-07-31 - 21:18

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 376 highest latencies:
System rack9slot4s (updated Fri Jul 31, 2026 12:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
313319911311094,33cyclictest757-21ls07:30:001
303982567517,32sleep10-21swapper/107:20:261
309432470423,32sleep00-21swapper/007:21:320
3133099154113,34cyclictest754-21munin-run07:30:000
226252990,4sleep1211ktimersoftd/112:40:271
161092960,9sleep03133099cyclictest11:00:010
231062940,4sleep0111rcuc/008:25:160
209922860,4sleep00-21swapper/008:20:130
31331994023,6cyclictest22-21ksoftirqd/111:02:591
14312400,4sleep13133199cyclictest11:45:211
31331993923,6cyclictest22-21ksoftirqd/111:09:391
31331993922,6cyclictest22-21ksoftirqd/112:21:031
31331993922,6cyclictest22-21ksoftirqd/111:38:461
31331993823,5cyclictest22-21ksoftirqd/112:37:201
31331993822,5cyclictest22-21ksoftirqd/109:49:081
193082380,3sleep00-21swapper/008:15:160
31331993722,5cyclictest22-21ksoftirqd/112:53:261
31331993722,5cyclictest22-21ksoftirqd/110:36:271
31331993721,6cyclictest22-21ksoftirqd/109:31:181
31331993720,6cyclictest22-21ksoftirqd/108:25:351
31331993712,6cyclictest31860-21cron08:50:011
3133199364,21cyclictest0-21swapper/107:41:381
31331993621,5cyclictest22-21ksoftirqd/109:40:331
31331993620,6cyclictest22-21ksoftirqd/110:56:301
31331993611,8cyclictest22-21ksoftirqd/112:17:201
118692361,31sleep011897-21/usr/sbin/munin10:45:300
79122351,30sleep07913-21sshd12:01:520
3133199355,19cyclictest0-21swapper/107:36:311
31331993519,5cyclictest22-21ksoftirqd/109:38:421
31331993518,6cyclictest22-21ksoftirqd/112:26:441
3133199351,21cyclictest2269-21sed10:20:311
31331993510,10cyclictest19667-21ntp_offset08:15:261
185392351,30sleep018597-21/usr/sbin/munin12:30:240
31331993418,6cyclictest22-21ksoftirqd/110:43:531
31331993418,6cyclictest22-21ksoftirqd/109:08:191
31331993418,6cyclictest22-21ksoftirqd/109:02:231
3133199341,6cyclictest0-21swapper/112:46:441
31331993411,7cyclictest22-21ksoftirqd/110:15:151
31331993411,13cyclictest9318-21cat09:15:111
3133099345,6cyclictest31868-21munin-run08:50:010
206662341,29sleep020673-21df_inode09:45:130
84712331,28sleep08620-21cstates12:05:140
3133199334,12cyclictest2419-21ntp_states07:30:261
3133199332,8cyclictest2225-21dbus-daemon07:45:291
3133199332,8cyclictest1605-21/usr/sbin/munin08:55:121
31331993318,5cyclictest22-21ksoftirqd/109:22:411
31331993317,6cyclictest22-21ksoftirqd/108:08:051
31330993321,8cyclictest4455-21latency_hist11:55:010
125402338,20sleep012678-21cpuspeed_turbos10:50:120
111542331,27sleep00-21swapper/007:55:010
3133199329,8cyclictest22-21ksoftirqd/110:46:461
3133199328,8cyclictest26268-21cstates10:00:131
3133199322,14cyclictest11924-21irqstats07:55:211
3133199322,13cyclictest22542-21df09:50:131
31331993215,5cyclictest40250irq/92-i91511:59:041
31331993213,5cyclictest8109-21processes09:10:271
31331993212,6cyclictest22-21ksoftirqd/109:56:071
31331993211,7cyclictest22-21ksoftirqd/111:33:221
3133199321,10cyclictest3286-21runrttasks10:51:201
3133099322,4cyclictest81rcu_preempt11:33:220
259602321,4sleep125969-21diskstats11:25:131
3133199313,14cyclictest2695-21snmpd11:44:121
3133199312,9cyclictest23626-21munin-run11:20:001
3133199312,17cyclictest0-21swapper/109:27:261
3133199311,8cyclictest10315-21aten_r4power_po12:10:111
3133199311,8cyclictest10092-21cron12:09:591
3133199311,14cyclictest3756-21smartctl11:50:281
3133099311,6cyclictest0-21swapper/008:00:400
3133099311,4cyclictest81rcu_preempt10:15:160
3133099311,10cyclictest0-21swapper/012:28:480
205682313,4sleep181rcu_preempt11:10:191
3133199302,13cyclictest24401-21iostat_ios11:20:211
3133199301,8cyclictest3286-21runrttasks07:53:231
3133199301,8cyclictest0-21swapper/110:31:261
31331993011,16cyclictest0-21swapper/108:20:131
3133099304,4cyclictest81rcu_preempt07:59:240
31330993020,6cyclictest11314-21switchtime12:10:270
3133099301,23cyclictest4250-21/usr/sbin/munin09:00:240
31330993010,17cyclictest12881-21needreboot12:15:220
31330993010,15cyclictest182952chrt09:39:420
86122291,5sleep00-21swapper/009:11:480
82642291,5sleep00-21swapper/010:36:570
64172291,5sleep00-21swapper/010:32:120
3133199298,12cyclictest31328-21cyclictest08:03:491
3133199293,12cyclictest4918-21wc10:30:001
3133199292,8cyclictest3286-21runrttasks08:51:161
3133199292,17cyclictest0-21swapper/112:30:551
3133199292,13cyclictest28375-21perl10:05:171
3133199291,13cyclictest28268-21/usr/sbin/munin08:40:191
31330992921,5cyclictest31781-21fschecks_time11:40:200
31330992921,5cyclictest24892-21cut08:30:170
3133099291,23cyclictest0-21swapper/009:15:270
311562291,5sleep00-21swapper/010:11:290
298272291,5sleep00-21swapper/008:43:290
277292291,5sleep00-21swapper/008:36:210
215672291,5sleep00-21swapper/011:13:170
176262291,5sleep00-21swapper/011:01:180
165562290,5sleep0111rcuc/009:35:010
11472291,5sleep00-21swapper/008:53:410
69712281,5sleep00-21swapper/007:42:420
68742281,5sleep00-21swapper/009:08:150
51182281,5sleep00-21swapper/007:38:060
3133199283,18cyclictest30080-21diskstats10:10:141
3133199283,13cyclictest24989-21hddtemp_smartct08:30:181
3133199282,14cyclictest7773-21/usr/sbin/munin12:00:301
3133199281,13cyclictest17253-21df08:10:131
3133099285,4cyclictest81rcu_preempt11:36:480
31330992810,12cyclictest28821-21processes10:05:270
3133099280,4cyclictest81rcu_preempt09:54:170
27782281,5sleep00-21swapper/008:55:440
255242281,5sleep00-21swapper/009:56:410
253352281,5sleep00-21swapper/012:50:080
25162281,5sleep00-21swapper/010:21:300
234782281,5sleep00-21swapper/011:18:370
186272281,5sleep00-21swapper/008:14:270
183872281,5sleep00-21swapper/011:05:130
142382281,5sleep00-21swapper/009:26:310
122562280,4sleep041ktimersoftd/009:20:320
46842271,5sleep00-21swapper/010:28:420
3133199271,12cyclictest27492-21timerwakeupswit08:35:301
3133099278,13cyclictest22733-21unixbench_multi12:40:270
3133099277,3cyclictest0-21swapper/012:20:240
31330992720,4cyclictest1974-21lldpad11:22:050
31330992710,12cyclictest9155-21grep07:50:010
274912271,5sleep00-21swapper/010:02:250
202182271,5sleep00-21swapper/009:44:590
102922271,5sleep00-21swapper/010:43:180
63142261,5sleep00-21swapper/011:59:570
31330992615,6cyclictest2311-21cat07:30:240
3133099261,4cyclictest81rcu_preempt08:06:230
3133099261,21cyclictest1575-21ntp_states11:45:240
31330992610,4cyclictest11565-21gdbus12:39:340
264312261,4sleep00-21swapper/011:25:230
240622261,5sleep00-21swapper/012:45:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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