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2026-07-23 - 08:13

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 all highest latencies:
System rack9slot4s (updated Thu Jul 23, 2026 00:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
41589912491228,16cyclictest0-21swapper/119:25:101
41589911671150,13cyclictest19135-21smartctl20:00:271
41579911321119,10cyclictest0-21swapper/019:25:080
37032700654,31sleep00-21swapper/019:20:480
39682647601,30sleep10-21swapper/119:23:361
415799137113,7cyclictest0-21swapper/020:00:270
305172770,7sleep0415799cyclictest23:30:190
49342540,7sleep0415799cyclictest20:50:190
112402490,9sleep0415799cyclictest19:40:210
112402490,9sleep0415799cyclictest19:40:210
4157994317,14cyclictest14637-21diskstats19:50:140
415899388,27cyclictest10592-21cron00:05:001
415799373,7cyclictest81rcu_preempt00:43:240
4157993514,7cyclictest14583-21iostat_ios21:15:200
415799351,22cyclictest21959-21unixbench_multi00:35:300
276492351,30sleep12695-21snmpd23:22:331
26082351,3sleep00-21swapper/020:45:090
415799341,14cyclictest0-21swapper/023:17:050
4157993314,7cyclictest3826-21iostat_ios23:45:200
415799330,11cyclictest81rcu_preempt00:01:580
194992331,4sleep118899-21/usr/sbin/munin00:30:201
119592331,4sleep111960-21sshd19:41:261
119592331,4sleep111960-21sshd19:41:251
84362321,5sleep10-21swapper/123:57:181
415899329,9cyclictest1974-21lldpad19:32:401
415799328,12cyclictest11564-21packagekitd21:24:300
415799325,14cyclictest0-21swapper/023:28:510
4157993212,6cyclictest7470-21python20:55:270
415799321,20cyclictest11565-21gdbus00:33:110
4157993211,7cyclictest13157-21memory19:45:230
4157993211,16cyclictest22396-21idleruntime20:10:170
284612321,27sleep028533-21python20:25:280
415899316,4cyclictest81rcu_preempt21:18:361
415899315,3cyclictest81rcu_preempt23:38:131
415899312,24cyclictest23700-21awk00:40:271
4158993110,16cyclictest192912chrt21:28:081
415799317,12cyclictest8546-21taskset23:58:250
415799311,4cyclictest81rcu_preempt21:33:590
4157993113,5cyclictest3286-21runrttasks00:10:580
205782311,26sleep120587-21iostat_ios20:05:211
415899305,4cyclictest81rcu_preempt21:23:371
415899304,4cyclictest81rcu_preempt22:33:171
415899301,4cyclictest81rcu_preempt00:13:451
415899300,4cyclictest81rcu_preempt00:17:511
415799302,15cyclictest3286-21runrttasks19:30:520
415799302,14cyclictest26299-21smartctl21:45:270
4157993015,11cyclictest12319-21cut21:10:120
415799301,4cyclictest81rcu_preempt21:08:140
415799301,4cyclictest81rcu_preempt21:08:130
4157993012,6cyclictest980-21df20:40:120
4157993012,5cyclictest11565-21gdbus21:54:570
4157993011,5cyclictest2075-21munin-run22:10:010
4157993010,6cyclictest20465-21latency_hist23:05:010
280382301,5sleep10-21swapper/123:25:041
27102301,5sleep00-21swapper/023:42:070
129382301,25sleep112944-21ntp_states21:10:261
95732291,5sleep00-21swapper/022:28:380
74022291,5sleep00-21swapper/022:20:330
64412291,5sleep10-21swapper/120:55:021
57052291,5sleep00-21swapper/022:17:390
415899295,17cyclictest11814-21memory22:40:201
415899294,9cyclictest22697-21diskstats23:10:151
415899293,4cyclictest81rcu_preempt20:50:381
4158992919,6cyclictest24765-21cut00:45:131
4158992919,6cyclictest24765-21cut00:45:121
415899291,4cyclictest81rcu_preempt22:47:331
415899291,4cyclictest81rcu_preempt22:26:281
415899291,4cyclictest81rcu_preempt19:38:241
4158992911,5cyclictest28865-21cron21:55:001
415899291,11cyclictest81rcu_preempt22:39:001
4158992910,5cyclictest8932-21interrupts21:00:181
4158992910,15cyclictest0-21swapper/100:50:101
415799292,14cyclictest394-21sort23:35:290
415799292,14cyclictest31291-21wget20:35:120
415799292,14cyclictest16141-21tr00:20:280
415799292,14cyclictest13506-21/usr/sbin/munin22:45:180
415799291,4cyclictest81rcu_preempt22:55:340
415799291,4cyclictest81rcu_preempt21:40:180
415799291,4cyclictest81rcu_preempt21:39:280
415799291,4cyclictest81rcu_preempt20:24:340
415799291,4cyclictest81rcu_preempt19:56:200
4157992913,6cyclictest3-21ksoftirqd/000:25:410
415799291,14cyclictest10763-21/usr/sbin/munin00:05:140
4157992910,6cyclictest14319-21/usr/sbin/munin00:15:270
259242291,4sleep00-21swapper/000:46:150
259242291,4sleep00-21swapper/000:46:150
250462291,5sleep00-21swapper/020:15:500
230252291,24sleep123127-21users20:10:291
213852291,5sleep00-21swapper/020:06:450
194042291,5sleep00-21swapper/021:29:200
181082291,5sleep10-21swapper/122:56:171
120782291,5sleep10-21swapper/100:05:591
100052291,5sleep00-21swapper/022:31:390
98772281,5sleep00-21swapper/021:03:050
68142281,5sleep00-21swapper/023:54:580
56972281,5sleep10-21swapper/122:17:331
415899285,4cyclictest81rcu_preempt23:40:341
415899284,4cyclictest81rcu_preempt20:30:391
415899284,18cyclictest25875-21iostat_ios21:45:201
415899284,18cyclictest10530-21diskstats21:05:211
415899284,18cyclictest10530-21diskstats21:05:201
415899283,4cyclictest81rcu_preempt23:34:491
4158992820,5cyclictest25317-21ls23:15:301
4158992818,6cyclictest21493-21cat00:35:251
415899281,4cyclictest81rcu_preempt00:22:221
4158992810,14cyclictest15371-21hddtemp_smartct22:50:171
415799282,13cyclictest11565-21gdbus23:21:410
415799282,13cyclictest0-21swapper/023:05:230
415799281,14cyclictest23210-21/usr/sbin/munin23:10:240
324632281,5sleep00-21swapper/022:03:130
279632281,4sleep00-21swapper/000:53:000
270942281,5sleep10-21swapper/120:22:231
228682281,4sleep10-21swapper/121:36:221
220202281,5sleep10-21swapper/123:07:461
21122281,5sleep10-21swapper/120:41:441
210732281,5sleep10-21swapper/121:32:111
161982281,5sleep00-21swapper/022:50:560
156812281,5sleep10-21swapper/119:51:061
106312281,5sleep00-21swapper/022:36:440
103202281,5sleep00-21swapper/019:39:070
67762271,5sleep10-21swapper/123:54:351
415899275,4cyclictest81rcu_preempt23:50:001
415899273,3cyclictest81rcu_preempt21:57:161
415899273,10cyclictest32188-21users22:00:291
415899272,3cyclictest81rcu_preempt19:57:061
4158992710,5cyclictest0-21swapper/122:23:061
306962271,5sleep00-21swapper/021:59:320
25572274,4sleep181rcu_preempt22:10:171
247642271,3sleep10-21swapper/121:41:221
415899269,5cyclictest40250irq/92-i91522:10:001
415899266,7cyclictest27515-21/usr/sbin/munin20:25:211
415899262,8cyclictest19254-21irqstats23:00:211
415899262,4cyclictest81rcu_preempt20:39:161
415899261,4cyclictest81rcu_preempt00:25:251
4158992610,5cyclictest40250irq/92-i91519:45:131
415799261,13cyclictest11565-21gdbus22:14:280
415799261,11cyclictest30041-21latency20:30:220
4157992610,5cyclictest3-21ksoftirqd/022:44:330
250902261,4sleep10-21swapper/120:16:161
415899247,5cyclictest40250irq/92-i91520:45:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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