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2026-07-29 - 11:23

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 Wed Jul 29, 2026 00:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
171719912701,7cyclictest19211-21sed19:30:011
167992643597,30sleep10-21swapper/119:21:401
154012464418,31sleep00-21swapper/019:20:040
1717099652,39cyclictest19164-21munin-node19:30:010
17170994123,5cyclictest3-21ksoftirqd/021:51:370
17170994023,6cyclictest3-21ksoftirqd/021:02:460
17170994016,6cyclictest3-21ksoftirqd/020:25:260
17170993922,6cyclictest3-21ksoftirqd/022:20:180
17170993915,6cyclictest22027-21fschecks_count19:35:140
17170993722,5cyclictest3-21ksoftirqd/020:56:300
17170993722,5cyclictest3-21ksoftirqd/019:54:270
17170993721,6cyclictest3-21ksoftirqd/022:57:590
17170993621,5cyclictest3-21ksoftirqd/020:18:460
17170993620,6cyclictest3-21ksoftirqd/019:58:510
30252351,29sleep13122-21mailstats21:35:271
1717099359,14cyclictest2267-21cron20:10:010
1717099357,11cyclictest0-21swapper/000:30:220
17170993520,5cyclictest3-21ksoftirqd/022:06:580
1717199342,6cyclictest31717-21iostat_ios20:00:181
17170993419,5cyclictest3-21ksoftirqd/022:32:340
17170993419,5cyclictest3-21ksoftirqd/020:22:230
17170993419,5cyclictest3-21ksoftirqd/019:33:140
17170993417,6cyclictest3-21ksoftirqd/000:16:200
107462341,4sleep010806-21grep20:30:220
52392331,4sleep15330-21users21:40:291
17170993318,5cyclictest3-21ksoftirqd/020:10:520
17170993318,5cyclictest3-21ksoftirqd/000:51:040
17170993318,5cyclictest3-21ksoftirqd/000:40:470
17170993318,5cyclictest3-21ksoftirqd/000:22:370
17170993318,5cyclictest3-21ksoftirqd/000:02:330
17170993317,5cyclictest3-21ksoftirqd/022:29:390
1717099331,15cyclictest186442wc23:45:000
1717199322,4cyclictest81rcu_preempt23:10:011
1717199321,4cyclictest81rcu_preempt23:22:551
1717099329,8cyclictest3-21ksoftirqd/023:24:070
1717099329,8cyclictest3-21ksoftirqd/021:14:250
1717099328,9cyclictest12857-21/usr/sbin/munin22:00:300
17170993217,5cyclictest3-21ksoftirqd/021:59:270
17170993217,5cyclictest3-21ksoftirqd/021:38:430
17170993217,5cyclictest3-21ksoftirqd/000:47:470
17170993211,9cyclictest0-21swapper/021:07:090
17170993211,6cyclictest3-21ksoftirqd/000:27:450
17170993210,7cyclictest3-21ksoftirqd/023:17:370
137122321,4sleep113789-21memory23:30:221
107502320,5sleep1201rcuc/100:50:001
181952311,10sleep00-21swapper/020:50:240
1717199315,4cyclictest81rcu_preempt23:17:361
1717199315,4cyclictest81rcu_preempt22:14:581
1717199312,4cyclictest81rcu_preempt20:25:011
1717099319,7cyclictest3-21ksoftirqd/023:07:160
1717099319,7cyclictest3-21ksoftirqd/022:17:110
1717099319,7cyclictest3-21ksoftirqd/021:46:330
17170993117,4cyclictest3-21ksoftirqd/023:02:240
17170993117,4cyclictest3-21ksoftirqd/020:44:010
17170993117,4cyclictest3-21ksoftirqd/020:35:180
17170993116,5cyclictest3-21ksoftirqd/022:50:020
17170993116,5cyclictest3-21ksoftirqd/019:43:430
17170993114,6cyclictest28364-21awk22:45:000
17170993113,5cyclictest31155-21fschecks_count21:25:170
138692311,26sleep113955-21hddtemp_smartct22:05:161
61452301,5sleep10-21swapper/100:35:281
61452301,5sleep10-21swapper/100:35:271
298282301,5sleep00-21swapper/022:45:510
216492304,22sleep121711-21timerandwakeup23:50:311
1717199305,4cyclictest81rcu_preempt21:06:051
1717199305,4cyclictest81rcu_preempt19:48:441
17171993016,8cyclictest24196-21iostat_ios19:40:201
17171993015,4cyclictest22-21ksoftirqd/122:45:401
1717199301,4cyclictest81rcu_preempt21:14:251
1717199301,4cyclictest81rcu_preempt20:59:511
1717199301,26cyclictest0-21swapper/120:29:521
1717199301,12cyclictest32341-21aten_r4power_po22:55:131
1717099309,7cyclictest3-21ksoftirqd/022:39:500
1717099309,6cyclictest3-21ksoftirqd/019:47:580
1717099307,12cyclictest15987-21df20:45:140
17170993016,4cyclictest3-21ksoftirqd/021:17:040
162972301,5sleep00-21swapper/023:35:580
326502291,5sleep00-21swapper/020:03:060
302662291,5sleep00-21swapper/021:21:320
294492291,5sleep00-21swapper/000:10:430
1717199295,4cyclictest81rcu_preempt22:33:171
1717199295,4cyclictest81rcu_preempt00:42:541
1717199294,4cyclictest81rcu_preempt21:50:021
1717199294,19cyclictest6544-21iostat_ios21:45:221
1717199293,4cyclictest81rcu_preempt00:17:231
1717099298,17cyclictest11565-21gdbus21:34:240
1717099294,19cyclictest13398-21diskstats23:30:150
17170992916,5cyclictest0-21swapper/000:05:270
17170992915,4cyclictest40250irq/92-i91523:50:250
1717099291,16cyclictest23786-21taskset23:55:320
169932291,5sleep10-21swapper/120:45:381
8492281,5sleep10-21swapper/100:21:371
72822281,5sleep00-21swapper/023:14:590
60732281,5sleep10-21swapper/120:19:321
54792281,5sleep00-21swapper/021:41:530
33722281,5sleep10-21swapper/123:03:191
283182281,5sleep10-21swapper/122:44:401
279402281,5sleep10-21swapper/100:09:321
202322281,5sleep00-21swapper/023:47:350
189802281,5sleep10-21swapper/120:51:441
1717199287,16cyclictest0-21swapper/121:25:111
1717199286,18cyclictest0-21swapper/123:40:261
1717199285,4cyclictest81rcu_preempt23:39:241
1717199284,4cyclictest81rcu_preempt19:36:441
1717199284,17cyclictest24697-21diskstats00:00:151
1717199283,4cyclictest81rcu_preempt21:32:221
1717199283,4cyclictest81rcu_preempt00:54:401
17171992819,5cyclictest17440-21cpuspeed_turbos22:15:141
17171992816,10cyclictest22-21ksoftirqd/122:35:271
1717199281,4cyclictest81rcu_preempt23:29:381
1717099288,16cyclictest17040-21taskset22:14:550
1717099286,7cyclictest3-21ksoftirqd/023:26:550
133922281,5sleep10-21swapper/120:37:241
62652270,5sleep11717199cyclictest23:10:221
296152271,5sleep10-21swapper/100:12:241
202142271,5sleep10-21swapper/123:47:231
1717199275,4cyclictest81rcu_preempt20:13:141
17171992718,6cyclictest28947-21tr21:20:121
1717199271,6cyclictest4093-21needreboot00:30:221
17170992711,13cyclictest0-21swapper/000:36:070
17170992711,13cyclictest0-21swapper/000:36:060
152382271,5sleep10-21swapper/120:41:521
110932271,4sleep10-21swapper/121:56:461
1717199266,9cyclictest0-21swapper/122:20:381
1717199263,4cyclictest81rcu_preempt20:31:151
1717199263,4cyclictest81rcu_preempt19:30:311
1717199262,9cyclictest27683-21memory21:15:241
1717199262,9cyclictest21390-21aten_r4power_en21:00:101
17171992617,6cyclictest22-21ksoftirqd/119:54:091
1717199261,4cyclictest81rcu_preempt22:26:061
1717199261,22cyclictest0-21swapper/122:53:431
1717199253,16cyclictest12186-21iostat22:00:201
17171992515,6cyclictest22-21ksoftirqd/123:59:151
1717199251,4cyclictest81rcu_preempt00:27:261
1717199251,13cyclictest0-21swapper/119:58:541
17171992415,6cyclictest22-21ksoftirqd/120:08:331
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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