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2026-08-25 - 22:53

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 Aug 25, 2026 12:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
157529912631239,18cyclictest0-21swapper/107:25:121
155652579519,44sleep00-21swapper/007:23:380
156292462417,30sleep10-21swapper/107:24:161
1575199162139,20cyclictest0-21swapper/007:25:110
120432690,4sleep00-21swapper/010:04:000
1575299472,14cyclictest211ktimersoftd/112:28:251
320112460,3sleep0111rcuc/008:05:130
1575199423,25cyclictest28710-21munin-run12:15:000
44182410,8sleep01575199cyclictest12:35:160
1575299415,8cyclictest211ktimersoftd/109:00:011
1575299412,8cyclictest0-21swapper/107:50:121
1575299411,9cyclictest0-21swapper/110:50:141
1575299408,5cyclictest28180-21ntpq10:45:231
1575299407,6cyclictest28545-21ntpq09:20:241
1575299402,8cyclictest0-21swapper/112:30:221
1575299401,9cyclictest0-21swapper/110:30:181
1575299401,8cyclictest0-21swapper/108:03:261
1575299398,5cyclictest9353-21ntpq09:55:231
1575299397,5cyclictest27816-21ntpq12:10:231
1575299391,9cyclictest0-21swapper/111:25:141
1575299391,9cyclictest0-21swapper/110:25:161
1575299391,8cyclictest0-21swapper/112:20:131
1575299391,8cyclictest0-21swapper/112:00:161
1575299391,8cyclictest0-21swapper/110:57:001
1575299391,8cyclictest0-21swapper/110:10:141
1575299391,8cyclictest0-21swapper/110:05:181
1575299391,8cyclictest0-21swapper/109:15:121
1575299391,8cyclictest0-21swapper/108:30:291
1575299388,6cyclictest16505-21fschecks_time10:15:161
1575299387,5cyclictest32669-21ntpq08:05:261
1575299387,5cyclictest11590-21ntpq08:35:241
1575299381,8cyclictest0-21swapper/111:01:541
1575299381,8cyclictest0-21swapper/108:23:081
1575299377,5cyclictest7843-21ntpq08:25:261
1575299377,5cyclictest22895-21ntpq09:05:251
1575299376,5cyclictest24775-21ntpq09:10:231
1575299375,6cyclictest22-21ksoftirqd/109:33:191
1575299372,4cyclictest18768-21fschecks_count07:30:141
15752993713,3cyclictest22-21ksoftirqd/111:06:371
15752993712,3cyclictest22-21ksoftirqd/111:20:391
15752993712,3cyclictest22-21ksoftirqd/108:52:521
1575299371,18cyclictest0-21swapper/110:44:191
1575299371,18cyclictest0-21swapper/110:44:191
1575199371,21cyclictest13938-21runrttasks08:40:290
1575299367,6cyclictest22-21ksoftirqd/109:52:001
1575299367,6cyclictest22-21ksoftirqd/109:47:001
1575299367,5cyclictest12439-21smartctl11:30:161
1575299367,14cyclictest25619-21smartctl12:05:201
1575299366,5cyclictest15355-21ntpq08:45:241
1575299364,3cyclictest81rcu_preempt11:56:481
1575299361,9cyclictest0-21swapper/111:10:181
1575299361,9cyclictest0-21swapper/110:00:121
15752993612,3cyclictest22-21ksoftirqd/107:56:371
1575199365,5cyclictest81rcu_preempt09:05:000
1575199364,11cyclictest81rcu_preempt11:35:440
1575199361,23cyclictest3066-21/usr/sbin/munin11:05:180
1575199361,14cyclictest0-21swapper/008:17:150
15751993610,13cyclictest2705-21cron08:12:000
1575299358,4cyclictest40250irq/92-i91512:38:501
1575299357,5cyclictest23268-21smartctl07:40:281
1575299356,6cyclictest22-21ksoftirqd/111:36:431
1575299351,8cyclictest0-21swapper/107:48:081
15752993512,3cyclictest22-21ksoftirqd/111:15:061
15752993512,3cyclictest22-21ksoftirqd/109:00:481
1575199358,13cyclictest8932-21ls12:45:280
1575199352,11cyclictest81rcu_preempt12:08:120
1575199351,20cyclictest27465-21chrt09:19:120
323992341,9sleep00-21swapper/010:55:400
30532341,4sleep03170-21mailstats12:30:280
1575299349,6cyclictest29083-21cpuspeed_turbos12:15:131
1575299347,6cyclictest22-21ksoftirqd/109:37:001
1575299347,6cyclictest18094-21smartctl11:45:161
1575299347,5cyclictest8673-21ntpq12:45:241
1575299347,5cyclictest24605-21smartctl10:35:271
1575299347,5cyclictest10982-21users12:50:281
1575299346,6cyclictest22-21ksoftirqd/108:15:531
1575299345,5cyclictest15191-21kworker/1:108:40:191
1575299344,7cyclictest81rcu_preempt11:52:471
15752993413,7cyclictest22-21ksoftirqd/112:42:391
15752993413,7cyclictest22-21ksoftirqd/111:41:041
15752993411,4cyclictest31116-21sshd09:27:581
1575199341,14cyclictest0-21swapper/011:32:270
147092341,29sleep014537-21/usr/sbin/munin08:45:130
1575299337,5cyclictest2081-21ntpq08:10:231
1575299336,6cyclictest22-21ksoftirqd/107:36:151
1575299333,10cyclictest0-21swapper/109:40:221
15751993313,15cyclictest18225-21iostat_ios07:30:040
1575199331,13cyclictest0-21swapper/009:20:590
26112321,4sleep011565-21gdbus09:39:430
1575299325,5cyclictest18977-21smartctl10:20:261
1575199329,8cyclictest1905-21cron12:30:000
15751993220,7cyclictest24121-21ps12:00:260
1575199319,11cyclictest25510-21wget10:40:120
1575199319,11cyclictest25510-21wget10:40:110
1575199317,12cyclictest11564-21packagekitd10:16:210
1575199311,6cyclictest23455-21runrttasks09:06:390
1575199311,4cyclictest81rcu_preempt11:45:200
1575199311,20cyclictest0-21swapper/012:52:370
1575199311,19cyclictest9356-21ntp_states09:55:240
15751993110,7cyclictest31325-21taskset08:03:230
1575199310,11cyclictest81rcu_preempt10:34:270
171832301,5sleep00-21swapper/011:42:280
1575199309,10cyclictest0-21swapper/012:40:160
1575199305,4cyclictest81rcu_preempt08:53:000
1575199302,16cyclictest0-21swapper/010:25:310
1575199302,15cyclictest0-21swapper/008:25:260
1575199302,14cyclictest4861-21wget09:45:110
15751993019,8cyclictest10050irq/91-xhci_hcd10:10:000
1575199301,4cyclictest81rcu_preempt11:55:400
15751993012,5cyclictest20818-21perl07:35:160
1575199300,4cyclictest81rcu_preempt08:59:100
313052291,5sleep00-21swapper/009:29:570
1575199292,13cyclictest3286-21runrttasks11:25:110
1575199292,13cyclictest28188-21ntp_states10:45:230
1575199292,12cyclictest9968-21date11:25:000
1575199291,4cyclictest81rcu_preempt12:15:170
1575199291,4cyclictest81rcu_preempt11:11:490
1575199291,4cyclictest81rcu_preempt08:36:380
15751992911,6cyclictest841-21diskstats11:00:160
15751992911,5cyclictest26589-21iostat07:50:190
1575199291,15cyclictest0-21swapper/007:40:280
1575199290,4cyclictest81rcu_preempt08:31:380
42072281,5sleep00-21swapper/009:40:470
195122281,5sleep00-21swapper/010:23:210
193052281,5sleep00-21swapper/011:50:010
1575199283,15cyclictest0-21swapper/011:15:190
1575199283,12cyclictest0-21swapper/010:35:220
1575199282,12cyclictest24248-21diskstats09:10:150
1575199281,4cyclictest81rcu_preempt10:50:250
1575199281,15cyclictest6764-21wget09:50:130
1575199281,14cyclictest6149-21python08:20:260
1575199281,12cyclictest530-21cron09:33:000
1575199271,4cyclictest81rcu_preempt07:55:290
1575199271,22cyclictest24565-21fschecks_time07:45:160
1575199271,13cyclictest31426-21/usr/sbin/munin12:20:220
1575199271,13cyclictest14624-21fschecks_time10:10:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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