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2026-07-28 - 14:49

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 Tue Jul 28, 2026 12:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
168889912671,1241cyclictest17522-21hddtemp_smartct07:25:181
168889911381084,35cyclictest7782-21cut09:50:011
168879911271090,27cyclictest0-21swapper/007:25:210
167492726680,30sleep10-21swapper/107:24:051
168252505458,31sleep00-21swapper/007:24:560
3104221000,8sleep10-21swapper/109:25:151
133642890,3sleep1211ktimersoftd/111:30:121
16887998051,13cyclictest0-21swapper/009:50:010
145022600,7sleep01688799cyclictest08:40:230
40022461,27sleep14012-21/usr/sbin/munin11:05:161
49782420,5sleep1201rcuc/109:40:261
1688799428,13cyclictest40250irq/92-i91508:20:010
215152390,5sleep1201rcuc/111:50:251
151832381,4sleep115301-21date10:10:011
326572361,4sleep1323-21/usr/sbin/munin09:30:121
1688899352,16cyclictest29117-21iostat10:45:181
1688799357,12cyclictest2225-21dbus-daemon12:46:180
16887993313,7cyclictest11832-21/usr/sbin/munin12:50:260
105662331,28sleep12695-21snmpd12:47:341
3252320,4sleep0111rcuc/009:30:110
196902321,27sleep119810-21mailstats11:45:281
1688899326,5cyclictest81rcu_preempt08:45:121
16888993222,6cyclictest29692-21ntp_states09:20:241
1688799327,14cyclictest10405-21needreboot09:55:200
16887993218,4cyclictest3-21ksoftirqd/012:12:290
16887993217,4cyclictest3-21ksoftirqd/012:38:490
16887993216,6cyclictest3-21ksoftirqd/012:41:500
16887993216,6cyclictest3-21ksoftirqd/008:11:400
16887993216,5cyclictest3-21ksoftirqd/010:46:540
16887993216,5cyclictest3-21ksoftirqd/007:34:050
1688899319,10cyclictest7218-21aten_r4power_en12:40:121
1688899311,5cyclictest0-21swapper/107:55:171
1688799312,4cyclictest81rcu_preempt08:01:120
1688799312,15cyclictest22937-21wget10:30:110
16887993120,7cyclictest26358-21/usr/sbin/munin09:10:310
16887993120,7cyclictest26358-21/usr/sbin/munin09:10:310
16887993116,4cyclictest3-21ksoftirqd/009:42:500
16887993115,6cyclictest3-21ksoftirqd/011:14:390
38052301,5sleep10-21swapper/109:39:261
249662300,3sleep041ktimersoftd/012:00:170
186072301,5sleep10-21swapper/110:16:321
1688899309,6cyclictest11565-21gdbus12:25:201
1688899306,4cyclictest81rcu_preempt08:36:051
1688899305,4cyclictest81rcu_preempt10:24:141
1688899302,10cyclictest1784-21users08:05:301
16888993020,6cyclictest7908-21wget09:50:121
1688899301,7cyclictest1993-21cstates11:00:121
16888993016,8cyclictest25355-21iostat_ios10:35:211
1688799308,11cyclictest3-21ksoftirqd/010:01:070
1688799302,14cyclictest10908-21udevd11:23:200
16887993016,4cyclictest3-21ksoftirqd/012:18:360
16887993016,4cyclictest3-21ksoftirqd/010:40:250
16887993015,5cyclictest3-21ksoftirqd/009:00:590
16887993014,5cyclictest3-21ksoftirqd/011:19:060
1688799301,25cyclictest27219-21expr09:15:120
16887993011,6cyclictest7079-21ntp_kernel_err08:20:210
1688799301,16cyclictest17066-21cron10:15:000
1688799301,15cyclictest18763-21grep08:50:280
4102291,4sleep1459-21sort10:55:201
33082291,5sleep00-21swapper/011:02:420
308942291,5sleep00-21swapper/007:59:490
283202291,5sleep10-21swapper/109:16:181
273562291,4sleep127513-21grep12:05:301
260592291,5sleep00-21swapper/010:35:480
248902291,5sleep00-21swapper/007:40:560
232582291,5sleep00-21swapper/007:38:430
192982291,5sleep00-21swapper/011:45:190
191582291,5sleep10-21swapper/108:53:481
1688899296,4cyclictest81rcu_preempt11:16:441
1688899295,4cyclictest81rcu_preempt12:12:181
1688899294,18cyclictest31393-21diskstats08:00:141
1688899293,9cyclictest20041-21iostat_ios08:55:201
1688899293,4cyclictest81rcu_preempt10:29:541
1688899291,14cyclictest25740-21diskstats07:45:141
1688899291,14cyclictest25740-21diskstats07:45:131
1688799292,14cyclictest21480-21ntp_kernel_pll_11:50:230
1688799292,13cyclictest2971-21ntp_states09:35:270
16887992920,6cyclictest0-21swapper/008:26:060
16887992915,4cyclictest3-21ksoftirqd/012:07:340
16887992914,5cyclictest3-21ksoftirqd/009:23:260
16887992913,6cyclictest3-21ksoftirqd/008:30:330
16887992913,5cyclictest3-21ksoftirqd/009:53:480
16887992912,6cyclictest3-21ksoftirqd/012:26:270
1688799291,19cyclictest0-21swapper/011:05:570
1688799291,15cyclictest31028-21df09:25:150
1688799291,15cyclictest24403-21grep09:05:310
1688799291,14cyclictest5134-21cron12:35:010
16887992910,6cyclictest20624-21sed08:55:290
66752281,4sleep10-21swapper/112:36:401
38632281,5sleep10-21swapper/108:11:171
315902281,5sleep10-21swapper/112:17:591
241912281,5sleep10-21swapper/110:30:511
225822281,5sleep00-21swapper/010:28:380
22072281,5sleep00-21swapper/008:09:390
173112281,5sleep00-21swapper/008:49:020
1688899285,4cyclictest81rcu_preempt11:56:581
1688899284,4cyclictest81rcu_preempt07:37:281
1688899283,4cyclictest81rcu_preempt12:52:531
1688899283,18cyclictest21636-21diskstats09:00:161
1688899282,9cyclictest5129-21munin-run12:35:011
1688899282,4cyclictest81rcu_preempt09:12:411
1688899282,4cyclictest81rcu_preempt09:12:401
1688899282,21cyclictest8003-21munin-run08:25:001
1688899281,8cyclictest25025-21cat09:09:591
16888992818,6cyclictest16867-21sort11:40:011
1688799289,7cyclictest25802-21sort07:45:140
1688799289,7cyclictest25802-21sort07:45:140
1688799281,18cyclictest0-21swapper/010:57:530
1688799281,14cyclictest12358-21/usr/sbin/munin11:25:290
16887992810,6cyclictest17521-21df_inode10:15:130
150542281,5sleep00-21swapper/010:08:410
132992281,5sleep00-21swapper/008:36:380
131222281,5sleep10-21swapper/110:03:031
113512281,5sleep10-21swapper/108:30:541
7952271,5sleep10-21swapper/112:20:341
70262271,5sleep10-21swapper/111:12:161
318122271,5sleep10-21swapper/110:51:581
286582271,4sleep00-21swapper/007:51:040
286172271,5sleep10-21swapper/107:50:401
1688899278,6cyclictest12401-21sed11:25:291
16888992712,4cyclictest9749-21aten_r4power_po09:55:101
1688799279,5cyclictest13739-21iostat11:30:190
1688799276,11cyclictest3-21ksoftirqd/010:51:250
1688799272,14cyclictest0-21swapper/011:39:050
1688799271,13cyclictest20016-21grep10:20:260
152172271,5sleep10-21swapper/108:41:521
60132261,5sleep10-21swapper/108:19:081
261432261,5sleep10-21swapper/112:04:531
252062261,5sleep10-21swapper/107:44:131
211182261,5sleep10-21swapper/107:33:191
1688799261,13cyclictest2225-21dbus-daemon11:56:190
1688799261,13cyclictest17529-21uname11:40:210
1688899258,5cyclictest8651-21fw_packets08:25:171
1688899253,9cyclictest0-21swapper/110:10:131
1688899252,3cyclictest81rcu_preempt11:20:481
16888992515,6cyclictest28122-21runrttasks10:42:321
1688799251,13cyclictest1012-21runrttasks12:22:490
1688899242,17cyclictest17206-21df11:40:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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