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2026-05-23 - 14:02

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 376 highest latencies:
System rack9slot4s (updated Sat May 23, 2026 00:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
293439911421108,30cyclictest31219-21awk19:30:011
289422607561,31sleep10-21swapper/119:21:201
289952563517,31sleep00-21swapper/019:21:570
2934299171145,7cyclictest31224-21sed19:30:000
233682840,4sleep0111rcuc/021:55:200
299322770,9sleep12934399cyclictest20:50:121
196122500,3sleep019614-21grep23:10:220
35462440,6sleep1201rcuc/122:29:591
29343994226,5cyclictest22-21ksoftirqd/100:15:001
2934299373,22cyclictest8669-21kworker/0:421:17:380
2934299371,11cyclictest0-21swapper/021:00:270
2934299352,4cyclictest81rcu_preempt22:53:320
29342993512,12cyclictest25407-21cat23:25:250
36862341,29sleep13760-21fschecks_count23:55:131
2934299344,20cyclictest17754-21unixbench_multi00:30:280
29342993413,3cyclictest0-21swapper/019:40:200
2934299332,18cyclictest6219-21/usr/sbin/munin21:10:290
2934299332,17cyclictest3223-21ls23:55:010
2934299332,16cyclictest11254-21diskstats20:00:140
2934299331,21cyclictest8794-21taskset19:53:580
2934399328,4cyclictest81rcu_preempt00:22:171
2934399321,9cyclictest17753-21grep00:30:281
29343993214,6cyclictest22-21ksoftirqd/123:00:111
2934299329,11cyclictest13157-21fschecks_count00:20:150
2934299327,14cyclictest11565-21gdbus21:37:110
2934299325,4cyclictest81rcu_preempt00:12:040
2934299324,11cyclictest0-21swapper/000:15:250
29342993213,5cyclictest20957-21iostat20:25:200
29342993213,5cyclictest20957-21iostat20:25:190
2934299321,17cyclictest1237-21udevd22:22:480
2934399317,13cyclictest40250irq/92-i91519:48:461
2934399313,20cyclictest1721-21diskstats19:35:131
2934399311,5cyclictest23949-21grep21:55:281
29343993112,5cyclictest17615-21fschecks_time21:40:131
29343993110,8cyclictest353-21udevd21:17:181
2934299315,4cyclictest81rcu_preempt22:11:190
2934299314,18cyclictest0-21swapper/023:57:080
2934299311,4cyclictest81rcu_preempt21:21:290
29342993113,5cyclictest5890-21diskstats22:35:140
2934299311,14cyclictest0-21swapper/023:08:060
125952311,5sleep10-21swapper/100:19:401
9272301,5sleep10-21swapper/119:31:371
50022301,5sleep10-21swapper/119:43:321
2934399305,10cyclictest2225-21dbus-daemon00:04:291
2934399304,20cyclictest32240-21iostat_ios20:55:181
2934399302,15cyclictest10217-21iostat_ios21:20:201
29343993015,5cyclictest22-21ksoftirqd/123:06:471
29343993014,6cyclictest22-21ksoftirqd/120:14:221
29343993013,6cyclictest22-21ksoftirqd/120:34:511
2934399301,25cyclictest14082-21missed_timers21:30:221
2934399301,16cyclictest28072-21tr20:45:111
2934299307,12cyclictest0-21swapper/021:25:100
29342993021,5cyclictest5934-21cat00:00:230
29342993012,5cyclictest2561-21ntp_states22:25:230
29342993011,6cyclictest17620-21fschecks_time21:40:130
148792301,5sleep00-21swapper/021:32:560
8342291,5sleep00-21swapper/020:59:230
2934399299,7cyclictest68972chrt22:35:471
2934399297,4cyclictest81rcu_preempt20:17:241
2934399295,4cyclictest81rcu_preempt22:55:561
2934399293,20cyclictest7821-21diskstats22:40:141
29343992921,5cyclictest31116-21python23:40:261
29343992920,5cyclictest19482-21tune2fs21:45:171
2934399291,4cyclictest81rcu_preempt20:21:351
2934299293,4cyclictest81rcu_preempt19:38:320
2934299292,15cyclictest0-21swapper/020:52:240
2934299292,14cyclictest3976-21df22:30:140
2934299292,14cyclictest0-21swapper/020:48:050
2934299292,13cyclictest9349-21df_inode19:55:130
2934299291,19cyclictest0-21swapper/022:08:540
29342992911,5cyclictest26806-21tr20:40:220
29342992911,5cyclictest15728-21python20:10:270
2934299291,14cyclictest23949-21cron20:34:590
263132291,5sleep10-21swapper/122:04:261
256802291,5sleep00-21swapper/020:38:300
240592291,5sleep00-21swapper/023:22:400
236362291,5sleep10-21swapper/100:46:421
200182291,5sleep10-21swapper/100:38:351
182472291,5sleep00-21swapper/020:19:270
161612291,5sleep10-21swapper/100:27:291
161282291,5sleep00-21swapper/000:27:080
148442291,5sleep00-21swapper/022:59:490
8992281,5sleep00-21swapper/019:31:180
89372281,5sleep00-21swapper/022:41:540
88202281,5sleep10-21swapper/100:09:261
69162281,5sleep00-21swapper/019:48:580
46572281,5sleep00-21swapper/021:08:400
45612281,5sleep10-21swapper/121:07:411
316882281,4sleep00-21swapper/022:16:430
29692281,5sleep10-21swapper/123:52:291
2934399289,5cyclictest81rcu_preempt22:20:001
2934399287,4cyclictest81rcu_preempt22:53:361
2934399285,4cyclictest81rcu_preempt21:28:491
2934399285,13cyclictest40250irq/92-i91520:44:411
2934399284,4cyclictest81rcu_preempt00:52:231
2934399282,22cyclictest0-21swapper/123:20:201
29343992816,6cyclictest5553-21iostat_ios21:10:191
29343992813,5cyclictest22-21ksoftirqd/122:31:311
29343992812,6cyclictest22-21ksoftirqd/123:18:051
29343992812,6cyclictest22-21ksoftirqd/122:10:071
2934399281,15cyclictest0-21swapper/119:53:471
2934399281,11cyclictest0-21swapper/121:37:111
2934299282,22cyclictest21159-21tune2fs23:15:150
2934299282,15cyclictest0-21swapper/023:36:210
2934299282,12cyclictest21603-21users00:40:300
29342992813,11cyclictest7519-21fschecks_count00:05:150
2934299281,19cyclictest0-21swapper/000:37:490
2934299281,13cyclictest24662-21/usr/sbin/munin22:00:180
29342992810,5cyclictest23972-21/usr/sbin/munin00:50:000
29342992810,15cyclictest0-21swapper/023:40:270
28912281,5sleep10-21swapper/121:04:571
272032281,23sleep027305-21/usr/sbin/munin23:30:260
255302281,5sleep00-21swapper/000:51:470
203702281,5sleep00-21swapper/021:46:190
166402281,5sleep00-21swapper/023:03:450
110312281,5sleep10-21swapper/122:49:091
2934399274,4cyclictest81rcu_preempt23:35:551
2934399274,4cyclictest81rcu_preempt23:11:381
2934399274,18cyclictest24708-21iostat_ios20:35:171
2934399273,18cyclictest20962-21iostat_ios20:25:201
2934399273,18cyclictest20962-21iostat_ios20:25:201
2934399271,6cyclictest13702-21seq20:05:261
29343992712,6cyclictest22-21ksoftirqd/120:03:281
2934299279,7cyclictest0-21swapper/023:47:170
2934299272,13cyclictest21335-21fschecks_time21:50:150
2934299271,4cyclictest81rcu_preempt20:08:040
2934299271,13cyclictest0-21swapper/020:20:290
2934299270,3cyclictest81rcu_preempt22:45:550
280272271,5sleep10-21swapper/122:07:451
2934399265,4cyclictest81rcu_preempt19:59:141
2934399264,4cyclictest81rcu_preempt23:31:201
2934399263,9cyclictest32576-21iostat_ios23:45:181
2934399262,9cyclictest22057-21munin-run00:44:591
2934399261,7cyclictest254062sleep123:25:251
29343992611,4cyclictest81rcu_preempt22:22:481
29343992514,6cyclictest22734-21sort21:55:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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