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2026-09-19 - 11:05

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 792 highest latencies:
System rack9slot4s (updated Sat Sep 19, 2026 00:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
172459911321090,24cyclictest17494-21wget19:25:120
172469911231110,10cyclictest0-21swapper/119:25:131
168792509462,32sleep00-21swapper/019:21:430
169742490445,30sleep10-21swapper/119:22:421
1250121240,6sleep112505-21unixbench_multi23:25:291
1250121240,6sleep112505-21unixbench_multi23:25:291
119862920,5sleep0111rcuc/020:35:000
159972860,3sleep115995-21ps23:35:271
17245996210,11cyclictest9615-21cron21:55:000
234872581,30sleep123496-21latency_hist19:40:011
36162400,5sleep017243-21cyclictest20:10:280
1724599394,5cyclictest81rcu_preempt19:45:270
1724599394,5cyclictest81rcu_preempt19:45:270
1724599388,14cyclictest2225-21dbus-daemon19:40:580
325542370,8sleep11724699cyclictest20:01:201
1724599362,11cyclictest81rcu_preempt00:49:560
17245993510,13cyclictest1280-21turbostat.cron00:25:000
119772351,30sleep112138-21perl22:00:161
1724699343,25cyclictest5899-21iostat_ios00:35:221
1724599344,5cyclictest81rcu_preempt00:25:290
1724599342,19cyclictest0-21swapper/023:14:560
17245993410,12cyclictest0-21swapper/021:05:220
114832341,3sleep011507-21munin-run22:00:010
1724699333,7cyclictest3286-21runrttasks00:02:161
1724699332,27cyclictest16383-21irqstats20:45:211
1724599331,20cyclictest7681-21taskset21:49:270
17245993311,7cyclictest32642-21df_inode22:55:130
282822321,5sleep00-21swapper/021:15:290
282822321,5sleep00-21swapper/021:15:290
17246993223,6cyclictest8211-21fschecks_count21:50:141
1724699321,4cyclictest92832tr23:20:001
17246993212,6cyclictest13550-21/usr/sbin/munin22:05:241
1724599328,12cyclictest3222-21grep21:35:280
1724599322,16cyclictest19671-21ntp_states23:45:230
17245993214,6cyclictest13839-21latency23:30:200
1724599321,18cyclictest8796-21runrttasks23:15:280
1724699315,4cyclictest81rcu_preempt21:17:241
1724699315,4cyclictest81rcu_preempt21:17:241
1724599316,12cyclictest81rcu_preempt23:10:000
1724599312,13cyclictest0-21swapper/019:38:060
1724599311,4cyclictest81rcu_preempt22:22:330
302292301,5sleep10-21swapper/122:49:081
225822301,5sleep10-21swapper/123:55:041
216022302,5sleep00-21swapper/019:34:550
181192300,8sleep01724599cyclictest22:15:230
1724699307,12cyclictest40250irq/92-i91522:15:161
1724699305,4cyclictest81rcu_preempt20:16:241
1724699304,6cyclictest9133-21proc_pri20:25:251
1724599307,19cyclictest0-21swapper/000:01:110
1724599302,4cyclictest81rcu_preempt20:21:480
1724599302,13cyclictest26017-21ntp_states21:10:230
17245993013,14cyclictest0-21swapper/022:25:180
1724599301,14cyclictest9134-21ps20:25:250
17245993010,7cyclictest22166-21/usr/sbin/munin21:00:210
1724599300,11cyclictest81rcu_preempt00:15:270
117162301,5sleep10-21swapper/120:33:401
107562301,5sleep10-21swapper/100:49:211
79542291,5sleep10-21swapper/120:23:361
299172291,5sleep00-21swapper/000:14:410
283772291,5sleep10-21swapper/122:44:241
240512291,5sleep00-21swapper/023:57:230
1724699297,4cyclictest81rcu_preempt21:59:481
1724699295,4cyclictest81rcu_preempt23:44:091
1724699295,4cyclictest81rcu_preempt22:25:551
1724699294,3cyclictest81rcu_preempt00:43:121
1724699294,19cyclictest26662-21diskstats00:05:161
1724699293,4cyclictest81rcu_preempt19:46:021
1724699293,4cyclictest81rcu_preempt19:46:011
1724699293,3cyclictest81rcu_preempt21:22:031
1724699293,19cyclictest551-21diskstats21:30:141
1724699291,4cyclictest81rcu_preempt19:31:241
17246992914,4cyclictest40250irq/92-i91520:35:161
1724699291,3cyclictest0-21swapper/122:35:311
1724699291,15cyclictest18260-21iostat_ios20:50:191
17246992911,5cyclictest11565-21gdbus19:42:241
17245992921,5cyclictest28647-21aten_r4power_en22:45:100
1724599292,14cyclictest21007-21df_inode23:50:140
1724599292,13cyclictest8024-21ntp_states00:40:250
1724599292,13cyclictest16275-21hddtemp_smartct20:45:180
17245992914,11cyclictest12503-21grep23:25:290
17245992914,11cyclictest12503-21grep23:25:290
1724599291,16cyclictest25430-21iostat_ios22:35:200
1724599291,15cyclictest29288-21fschecks_count21:20:140
1724599291,15cyclictest17073-21/usr/sbin/munin23:40:120
1724599291,15cyclictest12878-21/usr/sbin/munin20:35:270
1724599291,15cyclictest11898-21ls22:00:120
1724599291,14cyclictest4737-21iostat21:40:190
1724599291,14cyclictest15004-21/usr/sbin/munin20:40:270
1724599291,13cyclictest32040-21tail21:25:270
1724599291,13cyclictest28514-21latency_hist22:45:000
17245992910,6cyclictest0-21swapper/000:09:460
146342291,5sleep10-21swapper/123:32:151
11192291,5sleep10-21swapper/100:23:281
9102281,3sleep01075-21perl20:05:150
37462281,5sleep10-21swapper/121:37:451
321752281,5sleep10-21swapper/121:26:031
287162281,5sleep10-21swapper/119:50:411
249672281,5sleep10-21swapper/121:09:261
244512281,5sleep10-21swapper/122:32:451
242592281,5sleep00-21swapper/022:30:450
17442281,5sleep00-21swapper/021:32:340
1724699285,5cyclictest81rcu_preempt20:40:171
1724699284,8cyclictest30773-21diskstats22:50:151
1724699284,4cyclictest81rcu_preempt23:06:021
1724699284,16cyclictest0-21swapper/119:58:101
1724699283,4cyclictest81rcu_preempt22:22:061
1724699283,18cyclictest6257-21iostat_ios23:10:201
1724699282,3cyclictest81rcu_preempt20:05:531
1724699282,11cyclictest6618-21iostat_ios21:45:201
17246992820,5cyclictest21916-21grep23:50:291
1724699281,4cyclictest81rcu_preempt23:00:561
1724699281,4cyclictest81rcu_preempt00:29:441
17246992813,4cyclictest40250irq/92-i91520:55:091
1724699281,14cyclictest31380-21users00:15:301
1724699281,14cyclictest11456-21perl00:50:161
1724699280,3cyclictest81rcu_preempt21:42:261
1724599283,12cyclictest0-21swapper/020:15:120
1724599281,5cyclictest81rcu_preempt20:55:160
17245992811,5cyclictest16465-21seq23:36:480
1724599281,14cyclictest13769-21cpuspeed_turbos22:05:130
17245992810,5cyclictest3622-21grep00:30:120
168292281,5sleep10-21swapper/122:11:501
154222281,4sleep00-21swapper/022:10:100
12792281,5sleep10-21swapper/122:56:361
40012271,5sleep10-21swapper/120:11:431
295462271,5sleep10-21swapper/100:10:491
1724699271,18cyclictest0-21swapper/121:13:261
1724599273,18cyclictest31792-21iostat_ios20:00:190
1724599272,6cyclictest28685-21users19:50:280
1724599272,14cyclictest2401-21NetworkManager20:53:540
1724599272,13cyclictest2101-21diskstats23:00:140
1724599271,13cyclictest5987-21/usr/sbin/munin00:35:240
1724599271,13cyclictest31286-21ntpdc22:50:220
1724599271,13cyclictest31005-21runrttasks19:59:580
1724599271,13cyclictest10531-21timerandwakeup23:20:290
123002271,5sleep00-21swapper/000:50:490
17246992618,5cyclictest11565-21gdbus21:01:241
47372251,4sleep10-21swapper/100:30:541
1724699255,4cyclictest81rcu_preempt23:21:361
1724699254,4cyclictest81rcu_preempt23:48:501
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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