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2026-09-15 - 06:37

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 Tue Sep 15, 2026 00:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
182109912211198,20cyclictest0-21swapper/019:25:040
182119911921156,31cyclictest32143-21cat20:00:011
182119911891180,6cyclictest0-21swapper/119:25:081
178802625579,31sleep10-21swapper/119:22:041
178112482399,32sleep00-21swapper/019:21:240
2831421330,2sleep128315-21df21:15:141
18210999791,3cyclictest0-21swapper/020:00:010
1821099577,12cyclictest11270-21unixbench_multi00:45:290
1821099569,6cyclictest14442-21df23:30:120
1821099562,9cyclictest0-21swapper/023:10:200
1821099561,13cyclictest23972-21sed19:35:280
164072550,8sleep01821099cyclictest23:35:160
18210995411,5cyclictest12937-21diskstats22:00:160
1821099539,7cyclictest0-21swapper/022:17:050
1821099529,6cyclictest24150-21iostat23:55:180
18210995214,10cyclictest17997-21cut23:40:110
18210995213,5cyclictest26990-21ntp_states21:10:260
1821099521,14cyclictest17641-21unixbench_singl22:10:290
1821099521,13cyclictest8795-21chrt20:22:150
1821099521,13cyclictest3208-21munin-node21:35:100
257592510,7sleep00-21swapper/019:40:300
1821099512,13cyclictest28523-21ntp_states22:40:240
1821099511,12cyclictest14583-21taskset20:38:540
1821099501,12cyclictest6737-21fschecks_time00:35:160
1821099492,13cyclictest5801-21memory21:40:220
18210994911,5cyclictest32168-21/usr/sbin/munin20:00:220
1821099491,14cyclictest22733-21memory22:25:210
1821099491,14cyclictest15460-21/usr/sbin/munin22:05:270
1821099491,13cyclictest28028-21cron19:48:010
1821099491,12cyclictest608-21users21:25:300
1821099482,14cyclictest27931-21irqstats00:05:200
1821099481,13cyclictest30111-21cron19:55:000
1821099481,12cyclictest9178-21python00:40:270
1821099472,13cyclictest23135-21/usr/sbin/munin21:00:240
1821099472,12cyclictest8675-21/usr/sbin/munin23:15:100
1821099471,13cyclictest31801-21fschecks_count22:50:150
1821099471,13cyclictest1825-21iostat21:30:190
1821099462,14cyclictest21880-21python19:30:270
1821099461,13cyclictest4683-21df_inode00:30:150
1821099461,13cyclictest3894-21python23:00:280
1821099461,12cyclictest21329-21ntp_states20:55:220
18210994512,5cyclictest0-21swapper/023:05:200
1821099451,13cyclictest6286-21/usr/sbin/munin20:15:250
18210994216,6cyclictest3-21ksoftirqd/020:12:460
53652340,4sleep1201rcuc/121:40:121
1821199341,11cyclictest32346-21users00:15:301
18211993410,10cyclictest4949-21turbostat.cron21:40:001
1821099344,18cyclictest13000-21missed_timers23:25:230
1821099331,4cyclictest81rcu_preempt20:30:260
1821199321,5cyclictest81rcu_preempt20:30:281
18210993213,6cyclictest18575-21sort20:50:010
1821199316,4cyclictest81rcu_preempt23:34:101
1821199314,4cyclictest81rcu_preempt19:34:001
1821199312,9cyclictest0-21swapper/100:10:001
1821199311,4cyclictest81rcu_preempt20:22:441
1821199311,17cyclictest7222-21cstates21:45:121
1821099314,4cyclictest81rcu_preempt22:30:060
1821099312,12cyclictest0-21swapper/022:47:340
1821099312,11cyclictest0-21swapper/020:40:310
18210993113,5cyclictest9670-21ntpdc21:50:240
18210993113,5cyclictest28519-21perl21:15:170
18210993111,16cyclictest7212-21cstates21:45:120
135432311,5sleep10-21swapper/100:53:421
233762301,5sleep10-21swapper/122:26:031
211922301,5sleep10-21swapper/123:46:371
1821199305,5cyclictest81rcu_preempt22:40:291
1821199304,4cyclictest81rcu_preempt00:02:571
1821199302,22cyclictest24641-21/usr/sbin/munin19:40:321
1821199302,15cyclictest0-21swapper/120:15:251
1821099307,12cyclictest3286-21runrttasks21:08:070
1821099306,12cyclictest18208-21cyclictest00:00:190
1821099302,16cyclictest0-21swapper/000:14:180
18210993010,5cyclictest30467-21idleruntime21:20:170
177162301,5sleep10-21swapper/122:11:001
102222301,5sleep10-21swapper/121:51:221
33282291,5sleep10-21swapper/120:09:081
275152291,5sleep10-21swapper/121:11:221
273832291,5sleep10-21swapper/122:38:431
273832291,5sleep10-21swapper/122:38:431
218452291,5sleep10-21swapper/120:56:101
1821199297,5cyclictest81rcu_preempt21:25:241
1821199294,4cyclictest81rcu_preempt22:31:051
1821199294,17cyclictest0-21swapper/121:58:051
1821199293,12cyclictest0-21swapper/121:31:031
1821199292,4cyclictest81rcu_preempt20:42:221
1821199292,14cyclictest0-21swapper/121:01:171
1821199291,4cyclictest81rcu_preempt22:01:571
1821199291,4cyclictest81rcu_preempt00:34:161
18211992914,9cyclictest3873-21diskstats20:10:161
18211992913,5cyclictest40250irq/92-i91520:35:201
1821099292,15cyclictest19425-21ntpdc20:50:220
18210992911,6cyclictest10339-21/usr/sbin/munin20:25:270
18210992911,5cyclictest2225-21dbus-daemon00:17:090
18210992910,7cyclictest20744-21/usr/sbin/munin23:45:260
14142293,22sleep11564-21latency_hist20:05:011
113792291,5sleep10-21swapper/100:45:441
278742281,5sleep10-21swapper/119:46:251
21832281,5sleep10-21swapper/122:55:461
215102281,5sleep10-21swapper/122:21:071
191192281,23sleep119152-21idleruntime20:50:171
183772281,5sleep10-21swapper/120:49:041
1821199286,4cyclictest81rcu_preempt23:36:021
1821199285,4cyclictest81rcu_preempt00:42:051
1821199284,8cyclictest31743-21diskstats22:50:141
1821199284,4cyclictest81rcu_preempt23:20:391
1821199284,3cyclictest81rcu_preempt22:06:581
1821199283,16cyclictest0-21swapper/123:28:251
1821199281,9cyclictest11038-21snmpd23:40:151
18211992818,6cyclictest30389-21unixbench_multi00:10:291
1821199281,15cyclictest6729-21grep00:35:161
18211992811,5cyclictest40250irq/92-i91500:20:241
1821099282,13cyclictest3447-21/usr/sbin/munin00:25:240
1821099282,13cyclictest13307-21taskset00:51:120
1821099281,14cyclictest575-21wget00:20:130
1821099281,14cyclictest11027-21df_inode21:55:140
255802271,5sleep10-21swapper/121:05:501
243732271,5sleep10-21swapper/119:39:111
242682271,5sleep10-21swapper/123:55:221
1821199275,4cyclictest81rcu_preempt00:26:201
1821199274,4cyclictest81rcu_preempt20:25:021
1821199274,3cyclictest81rcu_preempt23:06:391
1821199273,9cyclictest28988-21irqstats19:50:191
1821199273,17cyclictest29864-21diskstats22:45:141
1821099273,3cyclictest81rcu_preempt22:55:150
1821099272,13cyclictest22185-21/usr/sbin/munin23:50:180
1821099271,13cyclictest25952-21/usr/sbin/munin22:35:130
1821099271,13cyclictest25952-21/usr/sbin/munin22:35:120
1821099271,13cyclictest0-21swapper/020:05:130
1821199263,8cyclictest18566-21diskstats22:15:131
1821199262,10cyclictest3370-21hddtemp_smartct23:00:171
1821099261,17cyclictest0-21swapper/023:20:320
1821199255,4cyclictest81rcu_preempt23:10:191
1821199253,4cyclictest81rcu_preempt21:20:571
1821199252,19cyclictest22516-21ntp_states23:50:241
18211992516,6cyclictest22-21ksoftirqd/123:18:541
1821099241,12cyclictest0-21swapper/022:23:440
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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