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2025-12-27 - 05:41

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 Sat Dec 27, 2025 00:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
61059911711147,20cyclictest12672-21smartctl21:05:181
61049911171081,33cyclictest0-21swapper/019:25:150
56722588541,31sleep10-21swapper/119:21:031
58022585540,30sleep00-21swapper/019:22:220
610599142133,5cyclictest6643-21cut19:25:151
610499131107,21cyclictest0-21swapper/021:05:180
277522920,4sleep0111rcuc/021:56:450
277522920,4sleep0111rcuc/021:56:440
207502710,8sleep0610499cyclictest00:36:090
610499676,32cyclictest0-21swapper/000:11:550
177372650,7sleep117739-21fschecks_count22:20:191
610499638,13cyclictest0-21swapper/000:43:230
610499632,29cyclictest0-21swapper/023:59:550
50772600,7sleep1610599cyclictest21:33:591
610499561,30cyclictest19354-21ssh21:48:350
610499504,17cyclictest5493-21swap00:20:270
201472490,26sleep120142-21timerwakeupswit00:35:281
310952470,8sleep1610599cyclictest23:40:231
136562460,8sleep0610499cyclictest22:15:290
39962420,7sleep0610499cyclictest21:32:250
147102420,7sleep0610499cyclictest23:24:050
610599409,27cyclictest0-21swapper/122:54:551
6105994010,4cyclictest81rcu_preempt21:51:521
284042404,3sleep028415-21ssh21:24:570
610499392,23cyclictest20314-21/usr/sbin/munin22:55:310
6104993913,4cyclictest81rcu_preempt00:27:590
44632380,8sleep0610499cyclictest23:13:170
200952388,4sleep113891-21diskmemload21:49:411
610499372,5cyclictest22431-21df_inode00:05:160
123832370,8sleep1610599cyclictest21:40:301
610599363,8cyclictest81rcu_preempt00:47:561
610599363,4cyclictest81rcu_preempt23:57:021
610599362,5cyclictest4657-21diskstats22:40:151
6104993627,5cyclictest17529-21ssh21:13:160
6104993611,6cyclictest81rcu_preempt23:00:180
6104993610,14cyclictest31648-21sh22:00:310
261482361,31sleep126158-21ssh00:41:591
610599355,27cyclictest0-21swapper/122:14:161
610599351,5cyclictest18516-21turbostat.cron00:34:561
610499352,29cyclictest0-21swapper/022:07:150
310982355,26sleep10-21swapper/123:07:031
245432351,30sleep124554-21ssh00:06:571
230852351,30sleep023096-21ssh23:32:130
610599345,4cyclictest81rcu_preempt00:15:081
610599344,4cyclictest81rcu_preempt00:50:281
6105993416,10cyclictest22-21ksoftirqd/123:25:161
610499341,5cyclictest2403-21irqbalance22:26:360
281972341,29sleep128343-21unixbench_multi22:30:301
180972341,3sleep018111-21ssh23:27:000
610599335,4cyclictest81rcu_preempt00:12:181
610599334,4cyclictest81rcu_preempt22:02:581
610599333,5cyclictest81rcu_preempt00:20:261
610599332,28cyclictest0-21swapper/122:25:361
6105993322,6cyclictest22036-21wget20:05:101
610599331,29cyclictest0-21swapper/123:36:551
610499338,12cyclictest911-21cpuspeed_turbos20:35:120
610499337,13cyclictest0-21swapper/022:44:460
6104993326,5cyclictest0-21swapper/020:33:350
6104993324,6cyclictest0-21swapper/023:19:160
610499332,28cyclictest0-21swapper/021:53:550
610499331,18cyclictest0-21swapper/000:01:480
51722331,4sleep15186-21ssh23:14:191
610599326,22cyclictest0-21swapper/123:22:111
610599324,4cyclictest81rcu_preempt21:16:251
610599324,4cyclictest81rcu_preempt21:10:231
610599323,4cyclictest81rcu_preempt22:55:551
610599323,4cyclictest81rcu_preempt22:15:491
610599323,4cyclictest81rcu_preempt22:08:301
610599323,4cyclictest81rcu_preempt21:25:391
6105993224,4cyclictest0-21swapper/100:02:551
6105993219,10cyclictest22-21ksoftirqd/121:36:121
610599321,5cyclictest80792grep23:50:171
610499324,4cyclictest81rcu_preempt00:18:490
610499323,4cyclictest81rcu_preempt21:25:320
610499323,14cyclictest302-21ntp_states22:35:270
610499323,14cyclictest302-21ntp_states22:35:260
6104993223,5cyclictest31419-21ssh23:07:290
6104993223,5cyclictest2403-21irqbalance00:53:560
610499322,17cyclictest0-21swapper/019:42:520
6104993213,6cyclictest20351-21diskstats20:00:150
610499321,29cyclictest0-21swapper/020:41:150
610499321,29cyclictest0-21swapper/020:18:350
610499321,19cyclictest0-21swapper/022:48:420
213902320,4sleep041ktimersoftd/021:16:500
610599314,4cyclictest81rcu_preempt21:21:151
610599313,4cyclictest81rcu_preempt22:36:281
610599313,4cyclictest81rcu_preempt22:36:281
610599313,4cyclictest81rcu_preempt21:59:051
610599313,4cyclictest81rcu_preempt21:59:051
610599313,4cyclictest81rcu_preempt19:53:361
6105993124,5cyclictest0-21swapper/119:43:351
610599310,4cyclictest81rcu_preempt23:04:581
610499314,4cyclictest81rcu_preempt22:14:000
6104993126,3cyclictest0-21swapper/021:36:350
610499312,16cyclictest0-21swapper/020:20:300
6104993121,5cyclictest30805-21ssh00:47:320
6104993115,5cyclictest3-21ksoftirqd/022:50:270
610499311,4cyclictest81rcu_preempt23:42:060
610499311,4cyclictest81rcu_preempt23:38:220
6104993113,5cyclictest18995-21ntp_states19:55:250
610499311,13cyclictest0-21swapper/022:33:570
41372311,9sleep10-21swapper/120:41:281
192252311,26sleep019236-21ssh22:21:110
128392311,26sleep013891-21diskmemload21:41:110
610599305,4cyclictest81rcu_preempt19:39:271
610599302,4cyclictest81rcu_preempt22:49:521
6105993012,5cyclictest81rcu_preempt20:25:001
610499309,10cyclictest0-21swapper/023:47:060
610499302,14cyclictest8223-21iostat23:50:210
610499301,27cyclictest0-21swapper/000:34:350
6104993012,5cyclictest9364-21irqstats19:30:200
610499301,17cyclictest0-21swapper/019:45:220
610599295,4cyclictest81rcu_preempt21:04:041
6105992915,4cyclictest22-21ksoftirqd/120:56:421
610599291,4cyclictest0-21swapper/120:32:151
610499296,11cyclictest0-21swapper/021:01:430
610499292,14cyclictest7357-21ntp_states20:50:250
307582291,5sleep10-21swapper/120:25:431
120472291,5sleep00-21swapper/019:36:530
109772291,5sleep10-21swapper/100:26:021
610599285,20cyclictest0-21swapper/123:18:121
610599285,13cyclictest40550irq/92-i91520:35:111
610599284,5cyclictest40550irq/92-i91519:55:141
610599283,19cyclictest26285-21iostat_ios20:15:201
610599281,15cyclictest22497-21ssh23:31:211
610499281,13cyclictest2645-21snmpd20:26:360
236132281,4sleep00-21swapper/020:09:430
610599272,6cyclictest0-21swapper/120:51:411
610599272,5cyclictest3147-21kworker/1:123:45:311
610599271,4cyclictest81rcu_preempt20:03:131
610599271,14cyclictest2645-21snmpd20:46:411
610599271,14cyclictest2645-21snmpd20:46:401
610499272,13cyclictest8699-21diskstats20:55:170
610499271,4cyclictest81rcu_preempt20:11:540
610499271,14cyclictest17863-21taskset19:53:370
159802271,5sleep10-21swapper/119:48:341
610599264,3cyclictest81rcu_preempt20:13:551
610599261,16cyclictest0-21swapper/119:32:171
610499251,12cyclictest5476-21ntp_states20:45:240
610499251,12cyclictest5476-21ntp_states20:45:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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