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2026-04-15 - 23:39

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 Wed Apr 15, 2026 12:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121819913021,1295cyclictest12693-21fschecks_count07:25:150
121829911651111,42cyclictest12572-21expr07:25:121
121829910751058,14cyclictest13382-21ssh09:35:241
119512629581,33sleep10-21swapper/107:23:091
121232584537,32sleep00-21swapper/007:24:560
1218199234223,6cyclictest13378-21ntp_states09:35:240
1646821160,7sleep11218299cyclictest10:12:021
136462810,5sleep00-21swapper/012:23:090
282402760,4sleep041ktimersoftd/009:17:320
100862630,3sleep041ktimersoftd/011:45:290
100862630,3sleep041ktimersoftd/011:45:280
277752590,2sleep127774-21cat09:50:231
234682491,30sleep123479-21ssh11:25:461
45012450,5sleep0111rcuc/010:33:320
327462440,5sleep1201rcuc/108:15:221
12181994426,6cyclictest3-21ksoftirqd/011:59:300
101022420,7sleep01218199cyclictest10:05:240
245782410,3sleep041ktimersoftd/012:35:010
12181994019,5cyclictest3-21ksoftirqd/010:44:190
1218199401,11cyclictest0-21swapper/011:34:120
286752390,8sleep01218199cyclictest10:58:320
202152390,4sleep120225-21ssh11:55:541
17122390,6sleep11707-21strings10:30:231
1218299398,28cyclictest0-21swapper/109:28:551
1218199399,16cyclictest20914-21if_err_eth010:50:170
1218199394,31cyclictest0-21swapper/009:49:160
12181993920,8cyclictest3-21ksoftirqd/009:10:150
1218199391,8cyclictest0-21swapper/011:25:350
277822381,4sleep127792-21ssh12:04:511
12181993822,5cyclictest3-21ksoftirqd/009:45:010
12181993821,5cyclictest3-21ksoftirqd/011:40:210
12181993810,25cyclictest3-21ksoftirqd/009:56:010
58502371,32sleep15859-21sh12:49:321
1218299375,5cyclictest81rcu_preempt10:17:381
1218299373,30cyclictest0-21swapper/111:54:161
12182993727,7cyclictest0-21swapper/110:00:151
1218299371,6cyclictest20792-21grep10:50:161
1218199376,18cyclictest0-21swapper/012:00:220
1218199374,5cyclictest0-21swapper/011:17:550
1218199374,12cyclictest81rcu_preempt12:42:430
1218199372,31cyclictest19142-21perl07:40:160
12181993721,5cyclictest3-21ksoftirqd/009:34:290
12181993717,5cyclictest3-21ksoftirqd/011:12:580
12181993717,5cyclictest3-21ksoftirqd/010:03:420
67392361,5sleep06754-21sh09:29:110
1218299366,4cyclictest81rcu_preempt10:23:521
1218299363,4cyclictest81rcu_preempt10:25:091
1218299363,30cyclictest0-21swapper/109:56:161
1218299363,29cyclictest0-21swapper/111:00:561
1218199362,19cyclictest17327-21diskstats11:20:130
12181993621,4cyclictest3-21ksoftirqd/012:50:170
12181993619,6cyclictest3-21ksoftirqd/012:29:400
12181993619,6cyclictest3-21ksoftirqd/012:18:350
12181993619,5cyclictest3-21ksoftirqd/010:20:220
1218199361,22cyclictest16102-21taskset08:56:080
1218299356,4cyclictest81rcu_preempt09:15:141
12182993526,5cyclictest0-21swapper/111:44:551
1218299351,6cyclictest0-21swapper/107:56:161
12181993526,5cyclictest2309-21cron12:40:000
1218199352,29cyclictest0-21swapper/009:52:360
1218199352,20cyclictest29159-21/usr/sbin/munin08:05:260
258072341,4sleep125839-21kernelversion10:55:191
1218299345,4cyclictest81rcu_preempt10:42:171
1218299343,4cyclictest81rcu_preempt11:18:221
12182993426,4cyclictest1474-21/usr/sbin/munin08:20:161
12182993419,11cyclictest0-21swapper/111:22:551
12181993417,6cyclictest3-21ksoftirqd/010:37:100
12181993416,5cyclictest3-21ksoftirqd/011:08:310
12181993415,5cyclictest3-21ksoftirqd/012:11:140
1218199341,20cyclictest31535-21runrttasks08:11:310
1218299331,8cyclictest27750-21cut11:30:261
1218299331,16cyclictest81rcu_preempt12:20:221
1218299331,12cyclictest2206-21dbus-daemon12:18:161
1218199332,3cyclictest0-21swapper/010:48:360
1218199332,18cyclictest18500-21munin-plugin-st07:40:000
12181993318,5cyclictest3-21ksoftirqd/012:08:160
12181993318,5cyclictest3-21ksoftirqd/010:11:070
12181993314,5cyclictest3-21ksoftirqd/011:51:050
12181993314,4cyclictest32459-21ssh09:21:350
1218199331,29cyclictest0-21swapper/011:03:160
1218199331,14cyclictest171672hwlatdetect09:00:170
1218299324,5cyclictest81rcu_preempt09:48:161
1218299324,15cyclictest0-21swapper/111:12:411
1218299323,4cyclictest81rcu_preempt12:40:191
1218299322,27cyclictest0-21swapper/109:40:561
1218299321,29cyclictest0-21swapper/110:38:561
1218299321,11cyclictest0-21swapper/112:30:171
12182993211,17cyclictest30178-21aten_r4power_cu08:10:101
1218199324,25cyclictest2243-21diskstats12:45:160
12181993217,5cyclictest3-21ksoftirqd/011:35:020
12181993217,5cyclictest3-21ksoftirqd/010:25:550
1218199321,6cyclictest0-21swapper/010:16:370
1218199321,28cyclictest0-21swapper/008:52:560
1218299319,4cyclictest40550irq/92-i91512:13:161
1218299317,5cyclictest81rcu_preempt11:45:131
1218299317,5cyclictest81rcu_preempt11:45:131
1218299315,4cyclictest81rcu_preempt07:44:351
1218299313,4cyclictest81rcu_preempt11:07:551
1218299312,4cyclictest81rcu_preempt09:12:221
1218299311,7cyclictest81rcu_preempt09:20:251
1218299311,4cyclictest81rcu_preempt12:27:061
1218299311,4cyclictest81rcu_preempt10:49:041
1218299311,4cyclictest81rcu_preempt08:01:021
1218299311,4cyclictest81rcu_preempt07:45:221
1218299311,4cyclictest81rcu_preempt07:32:451
12182993114,12cyclictest2206-21dbus-daemon11:35:531
1218199311,27cyclictest0-21swapper/007:55:420
1218299308,10cyclictest81rcu_preempt09:30:291
1218299305,4cyclictest81rcu_preempt08:06:261
1218299301,7cyclictest81rcu_preempt12:05:561
1218299301,4cyclictest81rcu_preempt12:35:031
1218299301,4cyclictest81rcu_preempt10:07:041
1218199303,13cyclictest11835-21ntp_states08:45:240
12181993014,6cyclictest3-21ksoftirqd/008:00:140
70312291,5sleep10-21swapper/108:34:381
68732291,5sleep00-21swapper/008:33:000
47982291,5sleep10-21swapper/108:25:551
219722291,5sleep00-21swapper/007:47:020
181132291,5sleep10-21swapper/109:02:231
1218299291,4cyclictest81rcu_preempt12:52:251
1218199298,11cyclictest3-21ksoftirqd/008:21:100
1218199292,13cyclictest32525-21hddtemp_smartct08:15:180
1218199291,4cyclictest81rcu_preempt08:37:250
12181992913,5cyclictest81rcu_preempt08:25:290
1218199291,20cyclictest0-21swapper/009:09:030
12181992911,5cyclictest22708-21df07:50:130
105042291,5sleep10-21swapper/108:41:321
1218299283,3cyclictest81rcu_preempt08:39:101
12182992819,5cyclictest18744-21cpuspeed_turbos09:05:131
1218299274,4cyclictest81rcu_preempt08:49:491
1218299273,13cyclictest40550irq/92-i91507:50:121
1218299271,4cyclictest81rcu_preempt07:39:521
1218299271,17cyclictest0-21swapper/108:51:191
1218199272,14cyclictest0-21swapper/008:41:260
12181992713,11cyclictest14777-21grep07:30:060
1218299251,4cyclictest81rcu_preempt08:58:551
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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