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2026-04-20 - 04:17

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 792 highest latencies:
System rack9slot4s (updated Mon Apr 20, 2026 00:59:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
80259911961163,29cyclictest0-21swapper/019:25:120
80259911791139,35cyclictest1551-21strings20:30:240
80269911121085,24cyclictest8195-21wget19:25:121
77472549505,30sleep10-21swapper/119:22:391
68502546500,30sleep00-21swapper/019:20:200
802699227219,5cyclictest1556-21runrttasks20:30:241
167862890,4sleep1211ktimersoftd/121:10:211
214252830,9sleep0802599cyclictest00:35:300
9712650,3sleep0111rcuc/000:15:130
802699488,3cyclictest81rcu_preempt22:28:031
802699468,4cyclictest0-21swapper/122:54:351
802699466,4cyclictest0-21swapper/123:51:431
8026994615,5cyclictest22-21ksoftirqd/122:32:321
802599467,15cyclictest0-21swapper/022:05:000
802699457,5cyclictest13169-21diskstats21:40:151
802699453,11cyclictest0-21swapper/100:29:361
8026994515,6cyclictest22-21ksoftirqd/123:13:161
8026994514,5cyclictest22-21ksoftirqd/100:15:111
802699443,11cyclictest0-21swapper/123:45:121
8026994414,6cyclictest22-21ksoftirqd/122:42:041
8026994413,5cyclictest22-21ksoftirqd/123:07:101
802699437,5cyclictest27852-21ntp_states23:35:271
802699436,5cyclictest22-21ksoftirqd/122:46:331
802699433,11cyclictest0-21swapper/100:12:301
802699433,11cyclictest0-21swapper/100:09:241
802699432,9cyclictest0-21swapper/122:06:111
802699432,9cyclictest0-21swapper/100:23:411
802699432,10cyclictest0-21swapper/121:56:591
8026994311,6cyclictest22-21ksoftirqd/123:25:431
802699428,4cyclictest81rcu_preempt00:52:331
802699422,9cyclictest0-21swapper/121:33:581
802699422,9cyclictest0-21swapper/121:15:261
802699422,9cyclictest0-21swapper/121:15:251
802699421,8cyclictest0-21swapper/120:47:211
8026994212,5cyclictest22-21ksoftirqd/100:34:081
8026994210,3cyclictest81rcu_preempt00:38:141
802699418,5cyclictest12797-21cstates19:35:121
802699418,3cyclictest81rcu_preempt21:37:421
802699417,7cyclictest22-21ksoftirqd/100:45:381
802699417,6cyclictest22-21ksoftirqd/123:40:301
802699411,9cyclictest0-21swapper/120:37:001
8026994115,5cyclictest22-21ksoftirqd/121:51:091
8026994115,5cyclictest22-21ksoftirqd/119:56:131
8026994112,4cyclictest22-21ksoftirqd/121:07:041
802699411,14cyclictest32391-21ssh21:25:541
8026994111,4cyclictest22-21ksoftirqd/119:42:581
8026994111,3cyclictest22-21ksoftirqd/120:19:351
8026994110,3cyclictest22-21ksoftirqd/123:33:071
802699406,9cyclictest22-21ksoftirqd/122:14:491
802699406,7cyclictest22-21ksoftirqd/123:00:241
802699405,5cyclictest2695-21snmpd21:21:451
802699405,5cyclictest2695-21snmpd21:21:451
802699403,11cyclictest0-21swapper/100:40:401
802699402,9cyclictest0-21swapper/122:55:421
8026994014,6cyclictest22-21ksoftirqd/122:19:191
8026994014,5cyclictest22-21ksoftirqd/100:04:191
8026994013,5cyclictest22-21ksoftirqd/123:59:051
8026994013,5cyclictest22-21ksoftirqd/123:17:041
8026994011,4cyclictest81rcu_preempt23:20:541
8026994010,5cyclictest22-21ksoftirqd/121:46:591
8025994015,5cyclictest35252fschecks_count21:30:160
802699398,3cyclictest81rcu_preempt19:45:011
802699392,9cyclictest0-21swapper/122:01:541
8026993915,6cyclictest22-21ksoftirqd/119:54:431
8026993914,5cyclictest22-21ksoftirqd/122:21:081
8026993910,6cyclictest22-21ksoftirqd/122:37:071
802599391,17cyclictest15965-21ssh22:50:140
802699388,3cyclictest22-21ksoftirqd/120:59:571
802699386,6cyclictest22-21ksoftirqd/120:10:281
802699384,5cyclictest13236-21smartctl21:00:301
8026993815,5cyclictest22-21ksoftirqd/119:31:501
8026993813,5cyclictest22-21ksoftirqd/120:41:511
8026993812,6cyclictest22-21ksoftirqd/120:52:511
202742381,25sleep020285-21ssh23:27:500
802699375,5cyclictest32333-21mailstats20:25:271
8026993719,4cyclictest22-21ksoftirqd/120:02:451
8026993712,5cyclictest22-21ksoftirqd/120:05:511
802699369,4cyclictest81rcu_preempt20:20:301
802599362,5cyclictest81rcu_preempt00:25:010
802599361,15cyclictest0-21swapper/023:17:360
304642361,30sleep030474-21ssh00:11:250
802599351,13cyclictest18881-21grep00:00:140
802599347,5cyclictest81rcu_preempt23:55:240
802599345,5cyclictest81rcu_preempt00:05:310
802599345,4cyclictest81rcu_preempt22:15:180
802599344,4cyclictest81rcu_preempt21:19:010
802599344,4cyclictest81rcu_preempt21:19:010
802599343,10cyclictest0-21swapper/000:30:230
802599342,4cyclictest81rcu_preempt22:56:210
8025993412,4cyclictest81rcu_preempt23:05:230
312602340,2chrt31261-21latency_hist20:25:010
310662341,29sleep00-21swapper/022:31:480
802599336,4cyclictest81rcu_preempt21:10:000
802599335,5cyclictest81rcu_preempt22:48:230
802599334,4cyclictest81rcu_preempt21:43:310
802599331,20cyclictest25784-21irqstats00:40:220
802599331,20cyclictest10804-21perl20:55:180
802599330,10cyclictest81rcu_preempt20:43:290
802599327,14cyclictest0-21swapper/021:46:220
802599325,4cyclictest81rcu_preempt23:20:480
802599325,4cyclictest81rcu_preempt22:10:310
802599325,4cyclictest81rcu_preempt19:50:120
802599324,4cyclictest81rcu_preempt23:10:580
802599324,4cyclictest81rcu_preempt22:41:050
802599324,4cyclictest81rcu_preempt21:28:010
802599324,4cyclictest81rcu_preempt00:26:340
802599323,4cyclictest81rcu_preempt22:39:190
8025993222,7cyclictest7329-21ssh22:07:170
8025993213,6cyclictest16769-21iostat_ios21:10:210
8025993211,6cyclictest9130-21/usr/sbin/munin23:50:110
802599321,14cyclictest14659-21kworker/0:121:35:260
163352321,4sleep016420-21basename19:45:110
802599318,4cyclictest81rcu_preempt21:24:200
802599318,4cyclictest81rcu_preempt21:24:200
802599317,11cyclictest0-21swapper/023:35:190
802599314,4cyclictest81rcu_preempt22:29:380
802599314,4cyclictest81rcu_preempt21:57:320
802599312,15cyclictest23744-21/usr/sbin/munin21:50:290
802599311,21cyclictest0-21swapper/022:20:030
8025993111,6cyclictest2006-21df00:50:130
20252311,5sleep00-21swapper/023:42:220
802599307,4cyclictest81rcu_preempt23:30:200
802599303,3cyclictest81rcu_preempt00:45:110
802599302,4cyclictest81rcu_preempt23:02:120
802599302,15cyclictest0-21swapper/020:54:560
8025993011,5cyclictest5823-21ssh23:45:440
802599294,4cyclictest81rcu_preempt21:01:260
802599292,13cyclictest32052-21runrttasks20:25:220
802599291,4cyclictest81rcu_preempt19:41:460
802599290,3cyclictest81rcu_preempt19:58:070
802599282,17cyclictest0-21swapper/019:35:120
802599281,15cyclictest24926-21/usr/sbin/munin20:05:280
802599281,13cyclictest7863-21taskset20:45:480
802599279,5cyclictest2943-21sort20:35:130
802599271,14cyclictest11565-21gdbus20:14:260
802599271,13cyclictest11331-21wc19:30:210
222622271,5sleep00-21swapper/020:00:150
292402261,5sleep00-21swapper/020:19:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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