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2026-08-13 - 01:07

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 Wed Aug 12, 2026 12:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
99079912031169,31cyclictest0-21swapper/007:25:250
99089911951175,16cyclictest10546-21hddtemp_smartct07:25:171
94462464417,32sleep00-21swapper/007:20:440
96412462419,29sleep10-21swapper/107:22:471
28612960,7sleep10-21swapper/109:55:121
9907998276,3cyclictest0-21swapper/009:45:160
990899386,5cyclictest81rcu_preempt07:35:191
211732381,3sleep021195-21/usr/sbin/munin07:50:260
9908993720,14cyclictest4931-21/usr/sbin/munin08:35:281
990799372,22cyclictest5423-21ntp_states10:00:250
990899362,30cyclictest0-21swapper/111:45:181
990799351,22cyclictest14003-21chrt10:25:090
9908993416,14cyclictest22-21ksoftirqd/110:02:151
9907993414,5cyclictest1354-21diskstats08:25:160
84372341,29sleep18482-21hddtemp_smartct11:35:181
282152341,3sleep028310-21/usr/sbin/munin09:35:220
217552341,29sleep121763-21iostat_ios12:10:201
9907993313,6cyclictest12890-21diskstats07:30:150
990799331,19cyclictest3503-21taskset12:47:370
990899327,9cyclictest19525-21switchtime07:45:291
990899327,9cyclictest19525-21switchtime07:45:281
990899321,16cyclictest18426-21sensors12:00:291
990799327,12cyclictest22880-21munin-plugin-st12:14:590
990799321,5cyclictest81rcu_preempt08:55:000
299852321,9sleep10-21swapper/112:30:441
209662321,9sleep10-21swapper/112:09:431
209662321,9sleep10-21swapper/112:09:421
990899315,7cyclictest19867-21cpuspeed_turbos10:40:121
990899312,8cyclictest0-21swapper/110:59:431
9908993122,6cyclictest28484-21kernelversion08:10:211
990899312,16cyclictest936-21iostat_ios11:15:201
9908993111,6cyclictest0-21swapper/109:15:481
990799315,4cyclictest81rcu_preempt11:06:140
990799312,4cyclictest81rcu_preempt11:23:560
9907993113,5cyclictest3525-21ntp_states09:55:240
990799311,19cyclictest0-21swapper/011:59:460
55372311,5sleep10-21swapper/112:54:141
52192311,27sleep05270-21switchtime11:25:280
990899306,4cyclictest81rcu_preempt09:47:041
990899305,4cyclictest81rcu_preempt07:56:311
990899305,3cyclictest81rcu_preempt12:41:061
990899303,4cyclictest81rcu_preempt09:35:501
990899301,4cyclictest81rcu_preempt12:39:041
990899301,4cyclictest81rcu_preempt12:30:011
9908993011,15cyclictest270982chrt09:32:221
990799308,18cyclictest27100-21df_inode12:25:130
990799308,11cyclictest81rcu_preempt08:00:170
9907993021,5cyclictest12928-21tune2fs08:55:150
990799302,14cyclictest4068-21python08:30:280
9907993011,6cyclictest15003-21hddtemp_smartct07:35:150
990799301,14cyclictest6516-21chrt08:38:420
9907993010,5cyclictest31145-21munin-run09:45:010
75052301,5sleep00-21swapper/011:31:450
7342301,25sleep12225-21dbus-daemon08:23:241
230342301,5sleep00-21swapper/012:15:090
137652301,5sleep10-21swapper/108:55:451
990899294,4cyclictest81rcu_preempt11:02:201
990899294,15cyclictest0-21swapper/111:25:211
990899291,4cyclictest81rcu_preempt08:25:131
990799298,5cyclictest17838-21aten_r4power_vo10:35:110
990799295,12cyclictest25828-21cron08:05:010
990799294,5cyclictest457-21fschecks_time12:40:160
990799293,4cyclictest81rcu_preempt10:30:230
990799292,15cyclictest16908-21/usr/sbin/munin07:40:180
990799292,13cyclictest23767-21/usr/sbin/munin09:25:290
9907992919,7cyclictest10050irq/91-xhci_hcd11:55:000
9907992912,5cyclictest11565-21gdbus11:43:060
990799291,16cyclictest31928-21df08:20:150
9907992911,5cyclictest9307-21irqstats08:45:200
990799291,15cyclictest11565-21gdbus10:58:170
9907992910,6cyclictest28138-21cat08:10:130
80512291,5sleep10-21swapper/110:08:401
302402291,5sleep00-21swapper/012:33:220
297302291,4sleep00-21swapper/008:15:010
270602291,5sleep00-21swapper/009:32:000
265062291,5sleep10-21swapper/112:23:341
264812291,5sleep00-21swapper/012:23:160
235212291,5sleep00-21swapper/007:55:460
234712291,5sleep10-21swapper/109:23:401
228752291,4sleep00-21swapper/010:46:150
215182291,5sleep00-21swapper/009:18:020
207612291,5sleep00-21swapper/012:07:350
207612291,5sleep00-21swapper/012:07:340
184672291,5sleep00-21swapper/007:45:110
184672291,5sleep00-21swapper/007:45:100
156802291,5sleep10-21swapper/109:00:591
135652291,5sleep00-21swapper/010:22:080
117602291,5sleep10-21swapper/110:18:051
990899284,14cyclictest0-21swapper/107:34:121
990899283,8cyclictest31222-21diskstats11:10:141
990899283,18cyclictest2575-21diskstats11:20:151
990899282,5cyclictest16829-21expr10:30:251
9908992818,6cyclictest0-21swapper/108:52:221
990799288,4cyclictest22339-21grep09:20:170
990799282,13cyclictest11244-21python10:15:280
990799281,4cyclictest81rcu_preempt10:12:130
990799281,4cyclictest81rcu_preempt10:05:220
9907992811,5cyclictest12600-21ntp_states11:45:260
990799281,14cyclictest23686-21df10:50:140
990799281,13cyclictest4889-21awk12:50:290
990799281,13cyclictest14644-21df09:00:120
310602281,5sleep10-21swapper/109:44:201
305142281,5sleep10-21swapper/111:07:301
287802281,5sleep00-21swapper/011:03:570
252662281,5sleep10-21swapper/109:27:501
244912281,5sleep10-21swapper/112:17:191
231282281,5sleep10-21swapper/110:48:531
218212281,5sleep10-21swapper/107:52:371
191362281,5sleep10-21swapper/110:36:371
181452281,5sleep10-21swapper/107:43:221
18042281,5sleep00-21swapper/011:17:190
171272281,5sleep10-21swapper/111:58:591
153292281,5sleep10-21swapper/111:54:471
115362281,5sleep10-21swapper/111:44:201
101242281,5sleep10-21swapper/108:46:561
990899275,4cyclictest81rcu_preempt10:54:381
990899275,4cyclictest81rcu_preempt08:04:391
990899273,4cyclictest81rcu_preempt12:48:281
990899272,10cyclictest30026-21df08:15:141
9908992716,7cyclictest8571-21ls10:10:111
9908992711,3cyclictest0-21swapper/109:50:261
990799278,7cyclictest19833-21cpuspeed_turbos10:40:110
990799278,6cyclictest30915-21fschecks_count12:35:150
990799275,12cyclictest40250irq/92-i91509:50:130
990799274,10cyclictest8140-21taskset08:40:510
990799271,13cyclictest17068-21ntpq09:05:240
990799271,12cyclictest9529-21seq11:38:160
85322271,5sleep10-21swapper/108:44:581
74272271,5sleep10-21swapper/111:30:561
44142271,5sleep10-21swapper/108:31:211
273092271,5sleep10-21swapper/108:05:571
195342271,5sleep10-21swapper/109:12:001
175492271,5sleep10-21swapper/109:05:541
139922271,5sleep10-21swapper/110:25:031
134332271,5sleep10-21swapper/110:20:471
990799261,14cyclictest0-21swapper/011:14:580
990799251,13cyclictest18705-21taskset12:00:390
990799231,11cyclictest0-21swapper/009:10:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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