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2026-04-10 - 04:27

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 Fri Apr 10, 2026 00:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
145479912551231,20cyclictest14977-21df19:25:121
145469912331204,15cyclictest0-21swapper/019:25:190
142462563517,30sleep00-21swapper/019:22:250
140702462418,29sleep10-21swapper/119:20:351
69632860,9sleep01454699cyclictest22:00:170
93042820,7sleep11454799cyclictest21:29:491
174392800,4sleep10-21swapper/121:37:361
242232640,2sleep024218-21pidof22:50:590
264412620,4sleep126440-21ssh22:20:201
10342620,3sleep041ktimersoftd/000:41:000
272022590,8sleep11454799cyclictest19:55:211
1454799574,6cyclictest0-21swapper/123:26:561
1454799571,10cyclictest46302sh00:45:161
1454799569,18cyclictest0-21swapper/122:11:141
201952540,2sleep020196-21expr21:40:230
14547995423,6cyclictest22308-21df_inode00:30:141
1454799531,30cyclictest0-21swapper/120:57:161
12552500,6sleep11257-21aten_r4power_vo23:35:111
1454799431,4cyclictest81rcu_preempt23:13:541
1454699407,5cyclictest81rcu_preempt20:20:180
1454799385,13cyclictest81rcu_preempt21:10:151
1454799376,27cyclictest0-21swapper/123:01:551
1454699377,26cyclictest0-21swapper/000:50:150
1454699372,7cyclictest0-21swapper/019:35:150
14546993727,7cyclictest0-21swapper/021:36:150
1454699371,33cyclictest0-21swapper/023:25:360
111242371,4sleep011138-21ssh23:10:500
78212360,8sleep10-21swapper/123:08:021
162082361,31sleep116250-21/usr/sbin/munin20:50:301
1454799363,29cyclictest0-21swapper/122:07:151
1454699368,24cyclictest0-21swapper/023:21:560
1454699362,30cyclictest0-21swapper/021:12:160
1454699361,14cyclictest896-21ssh23:35:000
1454799355,20cyclictest40550irq/92-i91522:41:141
1454799352,5cyclictest0-21swapper/121:20:361
1454799352,29cyclictest0-21swapper/123:54:351
1454799352,29cyclictest0-21swapper/122:47:561
1454799351,5cyclictest20754-21ssh00:28:361
1454699359,5cyclictest10054-21ssh21:30:170
1454699357,13cyclictest2668-21sshd22:12:130
1454699353,4cyclictest81rcu_preempt00:20:180
14546993527,4cyclictest0-21swapper/023:35:360
14546993523,10cyclictest0-21swapper/020:07:550
1454699351,14cyclictest4054-21ssh00:10:290
312852341,29sleep131302-21iostat_ios22:25:211
14547993423,6cyclictest29667-21ssh22:56:531
1454799342,28cyclictest0-21swapper/121:15:161
1454799342,12cyclictest81rcu_preempt23:20:071
1454799341,5cyclictest17209-21/usr/sbin/munin19:30:151
1454699348,11cyclictest20584-21sed21:05:010
1454699347,23cyclictest0-21swapper/021:53:320
1454699343,4cyclictest81rcu_preempt22:46:560
14546993427,5cyclictest0-21swapper/021:57:360
1454699342,4cyclictest0-21swapper/022:17:360
1454699341,21cyclictest2418-21cat20:15:230
14546993411,10cyclictest0-21swapper/021:29:230
170172331,5sleep00-21swapper/022:44:360
1454799337,4cyclictest81rcu_preempt00:35:181
1454799337,4cyclictest81rcu_preempt00:35:181
1454799335,4cyclictest81rcu_preempt21:58:011
1454799334,4cyclictest81rcu_preempt21:51:581
1454799333,4cyclictest81rcu_preempt22:32:001
1454799331,5cyclictest27343-21ssh21:47:561
1454799331,4cyclictest81rcu_preempt00:15:251
1454799331,4cyclictest20915-21/usr/sbin/munin22:15:161
1454799331,4cyclictest12412-21ssh22:39:561
1454799331,30cyclictest0-21swapper/121:01:171
1454799331,30cyclictest0-21swapper/120:31:361
1454699334,4cyclictest81rcu_preempt21:16:210
1454699333,4cyclictest81rcu_preempt22:59:070
1454699332,28cyclictest0-21swapper/023:42:560
1454699332,28cyclictest0-21swapper/000:06:560
1454699331,30cyclictest0-21swapper/021:06:560
1454699331,28cyclictest1968-21lldpad00:18:290
1454699331,19cyclictest29606-21timerandwakeup20:00:300
1454699331,19cyclictest0-21swapper/019:53:210
14546993310,11cyclictest0-21swapper/021:20:150
114122331,28sleep011541-21df22:05:130
84642321,27sleep07919-21/usr/sbin/munin22:35:170
1454799323,4cyclictest81rcu_preempt21:33:261
1454799321,7cyclictest14074-21ssh23:47:571
1454799321,4cyclictest81rcu_preempt20:41:591
1454699324,4cyclictest81rcu_preempt23:15:120
1454699324,26cyclictest0-21swapper/020:25:360
14546993213,6cyclictest3714-21ssh22:30:190
1454699321,28cyclictest20986-21ssh00:28:550
14546993212,6cyclictest11240-21df23:45:120
1454699321,19cyclictest0-21swapper/000:04:450
84112311,26sleep18476-21aten_r4power_po00:50:091
249302311,26sleep125010-21df19:50:121
158132311,4sleep015817-21ntp_states20:50:250
1454799314,4cyclictest81rcu_preempt00:13:181
1454799314,15cyclictest19374-21df_inode19:35:151
14547993125,3cyclictest0-21swapper/123:57:561
1454799311,5cyclictest29896-21cat00:04:541
1454799311,4cyclictest81rcu_preempt19:45:171
1454699314,4cyclictest81rcu_preempt00:34:220
1454699313,4cyclictest81rcu_preempt23:59:530
14546993121,6cyclictest4935-21ssh23:05:150
1454699312,12cyclictest613-21ntp_states23:00:250
14546993118,10cyclictest3-21ksoftirqd/000:45:260
1454699311,5cyclictest0-21swapper/020:12:560
1454699311,4cyclictest81rcu_preempt22:26:110
14546993110,16cyclictest26245-21fschecks_time22:20:170
227382301,5sleep10-21swapper/121:43:151
1454799307,12cyclictest40550irq/92-i91523:16:221
1454799305,4cyclictest81rcu_preempt00:05:321
1454799304,13cyclictest0-21swapper/123:31:471
1454799301,5cyclictest0-21swapper/120:19:161
1454799301,4cyclictest81rcu_preempt22:01:261
1454799301,27cyclictest0-21swapper/122:52:411
1454799301,27cyclictest0-21swapper/100:20:351
1454699306,12cyclictest23166-21forks19:45:160
14546993022,5cyclictest9327-21/usr/sbin/munin20:35:160
1454699302,14cyclictest18019-21ntpq19:30:240
1454699301,4cyclictest81rcu_preempt20:59:100
14546993011,5cyclictest0-21swapper/021:45:090
110362301,24sleep10-21swapper/120:40:011
90422291,5sleep10-21swapper/123:42:391
226652291,5sleep00-21swapper/019:44:480
1454799295,4cyclictest81rcu_preempt20:10:381
14547992922,5cyclictest0-21swapper/100:44:361
14547992916,8cyclictest30670-21diskstats20:05:121
1454699294,4cyclictest81rcu_preempt00:35:430
1454699294,4cyclictest81rcu_preempt00:35:430
1454699293,4cyclictest81rcu_preempt19:55:570
14546992917,5cyclictest3-21ksoftirqd/023:50:100
14546992910,6cyclictest7747-21diskstats20:30:140
1454799284,4cyclictest81rcu_preempt20:21:231
1454799281,14cyclictest21421-21/usr/sbin/munin19:40:151
1454699279,6cyclictest12468-21sed20:40:270
1454699271,12cyclictest13614-21hwlatdetect20:45:190
1454699271,12cyclictest13614-21hwlatdetect20:45:180
68932261,5sleep10-21swapper/120:25:581
221962261,6sleep10-21swapper/121:08:331
1454799263,4cyclictest81rcu_preempt20:02:301
1454799241,9cyclictest14207-21wc20:45:291
1454799241,9cyclictest14207-21wc20:45:291
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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