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2025-12-18 - 21:19

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 Dec 18, 2025 12:59:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
174469911981174,8cyclictest19509-21date07:30:021
174469911981174,8cyclictest19509-21date07:30:021
173372586539,32sleep00-21swapper/007:24:310
170782513471,27sleep10-21swapper/107:21:491
1435921310,8sleep01744599cyclictest11:20:270
1744599129106,19cyclictest19463-21munin-node07:30:010
1744599129106,19cyclictest19463-21munin-node07:30:010
299292980,8sleep11744699cyclictest12:50:261
41642850,5sleep0111rcuc/008:10:290
3492610,3sleep00-21swapper/011:05:200
200242610,2sleep120023-21ssh12:03:241
29842560,4sleep1211ktimersoftd/112:20:191
29842560,4sleep1211ktimersoftd/112:20:191
226532450,8sleep01744599cyclictest12:41:490
1744599459,32cyclictest7390-21fschecks_time12:25:150
202462430,4sleep1211ktimersoftd/111:27:161
174972410,8sleep01744599cyclictest09:35:330
105352410,8sleep01744599cyclictest11:16:050
96502396,6sleep09660-21ssh09:27:280
17446993912,4cyclictest81rcu_preempt11:05:521
17445993910,5cyclictest81rcu_preempt09:00:000
1744699386,5cyclictest81rcu_preempt08:45:271
17446993826,10cyclictest0-21swapper/107:40:161
1744599386,14cyclictest21933-21cron11:30:000
161462381,33sleep116156-21ssh11:59:271
1744699375,5cyclictest81rcu_preempt09:32:481
1744599372,5cyclictest27006-21diskstats11:35:160
181282361,31sleep118237-21cpu08:50:131
1744699369,4cyclictest81rcu_preempt09:29:521
1744699362,30cyclictest0-21swapper/112:30:161
1744699361,30cyclictest25486-21diskmemload10:40:161
1744699361,30cyclictest25486-21diskmemload10:40:161
1744599368,5cyclictest81rcu_preempt11:42:590
1744599365,27cyclictest0-21swapper/009:49:150
284012352,29sleep128422-21munin-run10:25:011
1744699354,4cyclictest81rcu_preempt10:45:491
1744699353,30cyclictest0-21swapper/110:02:151
1744699353,20cyclictest0-21swapper/109:45:201
17446993525,6cyclictest25486-21diskmemload09:36:321
17446993514,4cyclictest81rcu_preempt09:50:221
1744699351,30cyclictest18143-21ssh10:12:551
17445993513,7cyclictest0-21swapper/009:31:210
1744599351,29cyclictest25486-21diskmemload09:58:050
93722341,29sleep19409-21iostat11:15:211
70742341,4sleep07084-21ssh11:49:170
231552347,22sleep123209-21aten_r4power_en10:55:091
1744699348,13cyclictest0-21swapper/110:05:151
1744699348,13cyclictest0-21swapper/110:05:141
1744699345,4cyclictest81rcu_preempt09:15:121
1744699343,28cyclictest25486-21diskmemload09:13:361
1744699343,28cyclictest0-21swapper/112:46:161
17446993427,4cyclictest0-21swapper/109:57:351
1744699341,29cyclictest0-21swapper/112:11:061
1744599346,25cyclictest26324-21ssh12:45:560
17445993426,5cyclictest0-21swapper/009:11:550
1744599342,28cyclictest0-21swapper/010:27:560
1744599341,5cyclictest2403-21irqbalance12:39:560
1744599341,5cyclictest18763-21ssh10:13:550
17445993413,6cyclictest31684-21users12:15:320
1744599341,28cyclictest25486-21diskmemload11:12:380
284862331,4sleep128569-21memory07:50:221
1744699338,5cyclictest22102ssh11:43:481
1744699338,4cyclictest81rcu_preempt10:25:081
1744699335,4cyclictest81rcu_preempt10:53:391
1744699335,4cyclictest81rcu_preempt10:18:161
1744699331,7cyclictest23766-21ssh12:43:401
1744699331,5cyclictest0-21swapper/110:38:551
1744699331,4cyclictest24873-21kworker/1:209:22:151
1744699331,18cyclictest21416-21runrttasks07:30:351
1744599332,4cyclictest81rcu_preempt09:00:120
1744599332,4cyclictest81rcu_preempt09:00:120
1744599332,27cyclictest0-21swapper/012:20:330
1744599332,27cyclictest0-21swapper/012:20:320
1744599332,16cyclictest20957-21ntp_states07:30:250
1744599331,4cyclictest13246-21ssh10:07:150
1744599331,4cyclictest13246-21ssh10:07:150
1744599331,28cyclictest8555-21ssh10:01:560
17445993310,6cyclictest0-21swapper/010:21:330
228682321,3sleep10-21swapper/109:00:271
228682321,3sleep10-21swapper/109:00:271
1744699325,24cyclictest0-21swapper/109:41:361
1744699324,5cyclictest81rcu_preempt11:50:161
1744699324,5cyclictest81rcu_preempt11:50:151
1744699324,4cyclictest81rcu_preempt08:26:121
1744699321,5cyclictest0-21swapper/112:25:361
1744699321,5cyclictest0-21swapper/107:35:361
1744699321,29cyclictest0-21swapper/108:37:561
1744599326,15cyclictest25486-21diskmemload10:57:010
1744599326,13cyclictest0-21swapper/012:05:280
1744599321,5cyclictest81rcu_preempt12:30:260
1744599321,29cyclictest0-21swapper/011:31:560
1744599321,29cyclictest0-21swapper/007:40:350
1744599321,28cyclictest2403-21irqbalance11:58:350
1744599321,12cyclictest17082sh09:19:250
17445993210,18cyclictest20899-21/usr/sbin/munin10:15:270
225432310,8sleep01744599cyclictest09:41:220
1744699315,9cyclictest16187-21diskstats12:35:131
1744699313,4cyclictest81rcu_preempt11:48:351
17446993124,5cyclictest0-21swapper/108:08:161
1744699311,4cyclictest81rcu_preempt08:19:501
1744599314,4cyclictest81rcu_preempt12:12:360
1744599312,15cyclictest5955-21iostat_ios10:35:210
1744599311,28cyclictest0-21swapper/008:53:550
1744599311,27cyclictest0-21swapper/010:40:370
1744599311,27cyclictest0-21swapper/010:40:360
17445993111,5cyclictest27998-21diskstats11:00:160
119782310,4sleep0111rcuc/011:54:570
119782310,4sleep0111rcuc/011:54:560
7592301,5sleep10-21swapper/112:17:591
309282301,5sleep00-21swapper/012:52:280
220102301,5sleep00-21swapper/007:35:030
1744699303,14cyclictest81rcu_preempt11:30:161
1744699302,4cyclictest81rcu_preempt11:22:561
1744699301,4cyclictest81rcu_preempt12:06:571
1744699301,4cyclictest81rcu_preempt11:35:401
1744699301,4cyclictest81rcu_preempt08:20:581
1744699301,27cyclictest0-21swapper/111:13:351
1744699301,11cyclictest41652timerandwakeup08:10:291
17446993010,6cyclictest0-21swapper/111:02:461
1744599304,13cyclictest0-21swapper/009:53:380
1744599302,13cyclictest25486-21diskmemload10:48:470
1744599301,24cyclictest226052sleep010:54:280
17445993011,8cyclictest3-21ksoftirqd/009:20:260
17445993011,6cyclictest25486-21diskmemload12:00:180
81802291,5sleep00-21swapper/008:21:100
65482291,5sleep00-21swapper/008:18:550
5922291,5sleep10-21swapper/108:01:481
312122291,6sleep10-21swapper/107:57:201
250592291,5sleep00-21swapper/009:05:440
1744699292,22cyclictest1444-21/usr/sbin/munin10:30:231
1744699291,4cyclictest81rcu_preempt08:40:191
1744599299,6cyclictest12800-21tune2fs08:35:170
1744599292,12cyclictest0-21swapper/007:45:170
1744599291,3cyclictest81rcu_preempt08:25:460
17445992911,6cyclictest2906-21munin-run08:10:010
17445992911,5cyclictest30351-21iostat07:55:190
1744599291,14cyclictest693-21/usr/sbin/munin10:30:200
17445992910,6cyclictest14362-21/usr/sbin/munin08:40:280
276052281,5sleep10-21swapper/107:48:551
1744699281,4cyclictest81rcu_preempt09:07:191
1744699281,4cyclictest81rcu_preempt08:59:581
1744599281,14cyclictest17827-21seq08:48:440
120572281,5sleep00-21swapper/008:32:270
105852281,5sleep10-21swapper/108:30:091
293082271,5sleep00-21swapper/007:52:050
1744599271,14cyclictest748-21chrt08:03:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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