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2025-12-22 - 11:26

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 100 highest latencies:
System rack9slot4s (updated Mon Dec 22, 2025 00:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
303649912081198,7cyclictest0-21swapper/119:25:101
303639911441109,25cyclictest0-21swapper/019:25:090
303649911141096,15cyclictest3306-21strings19:35:231
290952575517,42sleep00-21swapper/019:20:180
298702564518,31sleep10-21swapper/119:20:311
264272970,7sleep13036499cyclictest21:30:241
9552860,4sleep041ktimersoftd/023:18:160
93972860,2sleep00-21swapper/023:26:180
107892820,4sleep1211ktimersoftd/122:20:451
38012810,4sleep1211ktimersoftd/121:40:261
30363997165,3cyclictest0-21swapper/019:35:230
261452560,9sleep03036399cyclictest21:30:200
165522560,5sleep016536-21ssh00:40:320
15832540,8sleep00-21swapper/000:25:250
116962500,4sleep0111rcuc/019:59:000
3036499463,4cyclictest81rcu_preempt00:30:461
213082468,6sleep03-21ksoftirqd/021:25:210
119422450,8sleep03036399cyclictest00:35:310
52952440,2sleep00-21swapper/022:49:340
30363994424,5cyclictest3-21ksoftirqd/023:30:230
30363994222,9cyclictest3-21ksoftirqd/022:30:250
30363994221,5cyclictest3-21ksoftirqd/021:51:080
30363994020,5cyclictest3-21ksoftirqd/021:19:390
30363994020,5cyclictest3-21ksoftirqd/021:11:110
3036499391,34cyclictest0-21swapper/123:26:161
3036399395,5cyclictest0-21swapper/000:11:150
30363993919,5cyclictest3-21ksoftirqd/022:41:060
30363993919,5cyclictest3-21ksoftirqd/022:20:300
30363993919,5cyclictest3-21ksoftirqd/021:35:070
300432390,23sleep03-21ksoftirqd/000:20:540
30363993821,4cyclictest3-21ksoftirqd/021:23:020
30363993721,5cyclictest3-21ksoftirqd/023:47:390
30363993711,10cyclictest3-21ksoftirqd/022:35:120
3036499366,12cyclictest3302-21runrttasks22:10:111
30364993628,6cyclictest0-21swapper/119:34:561
30363993621,5cyclictest3-21ksoftirqd/022:26:270
30363993621,5cyclictest3-21ksoftirqd/022:07:050
30363993621,5cyclictest3-21ksoftirqd/022:04:160
30363993621,5cyclictest3-21ksoftirqd/021:47:360
30363993621,5cyclictest3-21ksoftirqd/000:16:240
30363993621,4cyclictest3-21ksoftirqd/023:20:220
30363993620,5cyclictest3-21ksoftirqd/023:52:340
30363993620,5cyclictest3-21ksoftirqd/023:09:440
30363993619,6cyclictest3-21ksoftirqd/020:55:200
30363993619,6cyclictest3-21ksoftirqd/020:55:200
30363993619,6cyclictest3-21ksoftirqd/020:54:580
30363993619,5cyclictest3-21ksoftirqd/020:45:170
3036499351,5cyclictest7825-21ssh21:10:561
3036399359,22cyclictest0-21swapper/022:55:550
3036399359,11cyclictest25455-21cstates23:10:130
3036399358,13cyclictest5162-21timerandwakeup21:05:300
30363993520,5cyclictest3-21ksoftirqd/023:35:440
30363993520,5cyclictest3-21ksoftirqd/022:13:410
30363993520,5cyclictest3-21ksoftirqd/000:33:060
30363993519,5cyclictest3-21ksoftirqd/000:05:140
30363993518,5cyclictest3-21ksoftirqd/023:02:250
3036399351,20cyclictest3147-21df21:40:150
83112341,29sleep08325-21ssh22:19:120
72492341,29sleep17260-21ssh23:58:001
3036499345,4cyclictest81rcu_preempt22:31:151
30364993427,4cyclictest0-21swapper/121:57:351
30364993423,7cyclictest0-21swapper/122:19:351
3036499341,4cyclictest22192-21/usr/sbin/munin22:00:151
3036499341,30cyclictest0-21swapper/122:45:361
3036499341,18cyclictest14928-21ssh00:39:481
30363993420,4cyclictest3-21ksoftirqd/000:04:320
30363993417,6cyclictest3-21ksoftirqd/023:56:410
3036399341,30cyclictest0-21swapper/000:51:560
3036499336,5cyclictest81rcu_preempt21:37:031
3036499334,4cyclictest81rcu_preempt22:54:271
3036499332,18cyclictest14221-21cpuspeed_turbos22:25:131
30364993318,12cyclictest3302-21runrttasks22:42:061
3036399334,4cyclictest81rcu_preempt21:58:150
30363993317,5cyclictest3-21ksoftirqd/023:40:260
259482331,28sleep125958-21ssh00:51:221
3036499328,9cyclictest21352-21uname21:25:241
3036499327,4cyclictest81rcu_preempt21:06:071
3036499324,5cyclictest81rcu_preempt00:41:001
3036499324,4cyclictest81rcu_preempt22:56:191
3036499323,4cyclictest81rcu_preempt23:46:321
3036499323,4cyclictest81rcu_preempt00:21:091
30364993224,6cyclictest0-21swapper/121:49:351
30364993222,6cyclictest3886-21ssh00:27:511
30364993222,6cyclictest25138-21ssh23:43:041
3036499321,4cyclictest81rcu_preempt00:18:251
3036399324,4cyclictest81rcu_preempt22:50:080
3036399322,27cyclictest0-21swapper/019:40:160
30363993218,4cyclictest3-21ksoftirqd/000:45:450
3036399321,29cyclictest0-21swapper/020:00:560
284212321,9sleep10-21swapper/120:41:511
117902321,27sleep111800-21latency_hist20:00:011
3036499318,8cyclictest31072-21diskstats20:50:161
3036499316,4cyclictest81rcu_preempt22:36:461
3036499315,4cyclictest81rcu_preempt23:10:261
3036499314,4cyclictest81rcu_preempt23:35:031
3036499313,4cyclictest81rcu_preempt23:06:581
3036499313,4cyclictest81rcu_preempt22:05:501
3036499313,4cyclictest81rcu_preempt21:23:141
3036499313,25cyclictest22-21ksoftirqd/120:20:571
3036499312,5cyclictest81rcu_preempt00:02:331
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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