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2026-04-12 - 15:11

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 Sun Apr 12, 2026 12:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
46229911841144,28cyclictest5516-21strings07:25:210
46239910641056,5cyclictest5355-21iostat07:25:191
28252577531,31sleep00-21swapper/007:20:040
45562464371,78sleep10-21swapper/107:24:531
44072840,8sleep0462299cyclictest08:45:270
127682800,5sleep00-21swapper/011:56:210
114442600,8sleep0462299cyclictest09:05:180
273682510,2sleep127367-21python08:20:291
462399481,16cyclictest0-21swapper/110:46:471
4622994721,22cyclictest22377-21ssh12:40:160
307672470,8sleep0462299cyclictest10:35:130
223532460,8sleep0462299cyclictest09:52:450
266622450,4sleep041ktimersoftd/009:56:580
97722440,4sleep041ktimersoftd/009:00:230
240962430,2sleep10-21swapper/112:08:451
462399427,31cyclictest0-21swapper/112:31:161
462399415,32cyclictest0-21swapper/110:01:151
4623994112,4cyclictest81rcu_preempt11:50:121
51642400,7sleep10-21swapper/110:41:341
462399406,4cyclictest81rcu_preempt11:59:301
4623993912,4cyclictest81rcu_preempt11:35:171
4622993911,14cyclictest17322-21sh09:14:420
462299382,7cyclictest0-21swapper/009:16:560
280422380,4sleep0111rcuc/012:45:310
76512370,9sleep0462299cyclictest08:55:160
462399379,16cyclictest0-21swapper/111:16:341
462399376,4cyclictest81rcu_preempt09:45:531
462399375,4cyclictest81rcu_preempt09:35:231
462399374,5cyclictest81rcu_preempt09:55:271
462399373,31cyclictest0-21swapper/111:06:351
4623993728,6cyclictest0-21swapper/111:43:561
462399371,8cyclictest0-21swapper/110:33:561
462299375,28cyclictest0-21swapper/011:36:160
462299372,5cyclictest81rcu_preempt09:20:240
462399365,4cyclictest81rcu_preempt09:23:551
462399363,4cyclictest14069-21ssh10:17:351
462399362,5cyclictest11583-21perl07:40:161
462399362,31cyclictest0-21swapper/111:47:561
4623993619,13cyclictest26099-21ssh12:44:361
462399359,14cyclictest40550irq/92-i91512:25:231
462399355,4cyclictest81rcu_preempt12:49:261
4623993528,5cyclictest22-21ksoftirqd/109:54:591
462399351,5cyclictest21365-21hddtemp_smartct10:25:161
462399351,5cyclictest21365-21hddtemp_smartct10:25:151
4622993527,4cyclictest15593-21/usr/sbin/munin12:00:150
4622993526,6cyclictest0-21swapper/010:42:560
462299352,16cyclictest22554-21diskstats11:00:150
4622993511,6cyclictest22534-21latency_hist08:10:010
462299351,11cyclictest0-21swapper/011:40:130
3942350,4sleep0111rcuc/009:30:150
202922350,27sleep122-21ksoftirqd/111:30:281
175032351,4sleep117514-21ssh09:14:591
173312351,29sleep117341-21ssh10:55:071
462399349,4cyclictest81rcu_preempt10:10:101
462399348,22cyclictest0-21swapper/111:27:371
462399346,4cyclictest81rcu_preempt10:50:121
462399345,4cyclictest81rcu_preempt12:21:371
462399343,29cyclictest0-21swapper/108:03:361
4623993412,8cyclictest21674-21idleruntime-cro12:40:001
462299347,12cyclictest4902-21cron11:48:590
462299344,16cyclictest0-21swapper/007:55:300
462299344,12cyclictest0-21swapper/008:34:550
462299343,4cyclictest81rcu_preempt09:48:250
4622993427,4cyclictest0-21swapper/010:02:550
4622993423,8cyclictest0-21swapper/012:11:360
462299342,29cyclictest0-21swapper/011:20:560
4622993412,18cyclictest4282-21sh10:07:230
213242341,4sleep021338-21ssh10:59:090
105782341,4sleep110648-21ntpq09:40:241
462399338,4cyclictest81rcu_preempt09:19:211
462399338,13cyclictest40550irq/92-i91512:00:271
462399333,4cyclictest81rcu_preempt10:06:001
4623993314,7cyclictest7832-21ls08:55:221
462299334,4cyclictest81rcu_preempt12:51:110
462299332,4cyclictest0-21swapper/010:26:560
462299332,4cyclictest0-21swapper/010:26:560
462299332,28cyclictest0-21swapper/011:14:550
462299332,28cyclictest0-21swapper/010:47:360
462299331,30cyclictest0-21swapper/010:10:560
150762331,5sleep00-21swapper/010:19:030
462399325,4cyclictest81rcu_preempt10:24:011
462399324,3cyclictest81rcu_preempt11:23:291
462399322,4cyclictest81rcu_preempt10:37:221
4623993219,8cyclictest2760-21watchsnmpd12:55:011
462399321,4cyclictest81rcu_preempt08:38:151
462299326,13cyclictest2309-21cron09:26:000
462299324,4cyclictest81rcu_preempt12:37:420
4622993213,5cyclictest19131-21ssh11:30:110
4622993212,6cyclictest28419-21unixbench_singl11:05:270
4622993211,4cyclictest0-21swapper/009:35:520
21462321,5sleep10-21swapper/111:12:251
462399316,4cyclictest81rcu_preempt08:14:491
462399313,4cyclictest81rcu_preempt12:14:481
4623993123,5cyclictest22-21ksoftirqd/109:30:221
4623993116,4cyclictest22-21ksoftirqd/112:18:241
4623993116,4cyclictest22-21ksoftirqd/112:18:231
462399311,5cyclictest0-21swapper/108:25:141
462399311,16cyclictest23196-21runrttasks11:00:271
462299313,13cyclictest27099-21users10:30:310
4622993123,5cyclictest0-21swapper/008:40:360
4622993122,6cyclictest24959-21wget08:15:170
4622993122,6cyclictest20303-21ssh10:24:380
462299312,14cyclictest2329-21NetworkManager11:50:580
462299311,4cyclictest81rcu_preempt12:26:350
462299311,4cyclictest81rcu_preempt12:24:180
462299311,4cyclictest0-21swapper/007:45:550
462299311,17cyclictest18585-21cron11:30:000
462299311,15cyclictest2206-21dbus-daemon12:07:390
4622993111,5cyclictest12890-21sh10:50:130
462299311,15cyclictest12522-21df12:30:120
124662311,5sleep00-21swapper/009:42:230
462399305,3cyclictest81rcu_preempt08:40:151
462399304,14cyclictest13671-21perl07:45:171
4623993023,5cyclictest0-21swapper/108:48:561
4623993022,5cyclictest28967-21awk09:25:301
462399301,4cyclictest81rcu_preempt07:35:231
462399301,16cyclictest22528-21latency_hist08:10:011
4622993011,16cyclictest3-21ksoftirqd/011:16:120
4622993010,5cyclictest28535-21forks08:25:150
462299300,4cyclictest81rcu_preempt12:16:220
462299300,4cyclictest81rcu_preempt12:16:220
280482301,5sleep00-21swapper/008:24:520
111142301,5sleep00-21swapper/007:40:080
462399291,4cyclictest81rcu_preempt08:15:331
462399291,4cyclictest81rcu_preempt07:59:561
4622992911,5cyclictest592-21threads08:35:270
462299291,15cyclictest2206-21dbus-daemon07:38:510
462299291,14cyclictest5913-21grep08:50:200
188252291,5sleep00-21swapper/008:00:080
103872291,5sleep10-21swapper/109:00:511
4623992819,6cyclictest0-21swapper/108:54:561
462399281,4cyclictest81rcu_preempt08:30:311
462299288,6cyclictest15629-21if_eth007:50:180
462299282,13cyclictest7033-21munin-node07:30:040
240862281,4sleep00-21swapper/008:12:570
123602281,5sleep10-21swapper/109:06:531
4623992713,12cyclictest0-21swapper/107:31:141
4623992618,4cyclictest22-21ksoftirqd/107:50:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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