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2025-12-17 - 17:06

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 Wed Dec 17, 2025 12:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16519911931183,7cyclictest0-21swapper/107:25:061
16509911651149,13cyclictest25447-21kworker/0:607:25:050
16519911081088,17cyclictest6199-21apt-get07:35:001
15222563517,31sleep00-21swapper/007:24:120
14382463418,30sleep10-21swapper/107:23:251
165099175152,16cyclictest6178-21/usr/sbin/munin07:35:010
318802960,7sleep0165099cyclictest11:57:320
165199821,39cyclictest18748-21chrt12:19:301
165199791,35cyclictest30996-21latency_hist10:45:011
165199781,43cyclictest21553-21sh09:22:011
1651997713,31cyclictest24198-21perl09:25:171
165199742,38cyclictest9818-21diskmemload12:11:311
165199741,5cyclictest4220-21aten_r4power_po10:15:121
165199741,38cyclictest12706-21grep11:00:171
165199732,35cyclictest17021-21diskstats11:05:151
165199732,34cyclictest26610-21seq11:15:271
165199731,40cyclictest4974-21chrt11:27:321
165199731,37cyclictest32493-21ssh12:34:541
165199731,37cyclictest2139-21chrt08:49:391
1651997310,30cyclictest7811-21aten_r4power_vo10:55:111
185352720,3sleep018534-21ntp_kernel_pll_10:30:230
324302710,3sleep032431-21rm09:34:570
165199711,43cyclictest9818-21diskmemload10:29:101
165199711,38cyclictest14354-21/usr/sbin/munin09:15:001
165199711,35cyclictest29137-21seq11:55:061
165199711,35cyclictest24853-21seq08:21:151
165199709,41cyclictest3302-21runrttasks09:09:111
165199701,6cyclictest24931-21cstates11:50:111
165199701,6cyclictest17152-21chrt11:40:291
165199701,5cyclictest9441-21/usr/sbin/munin09:45:281
165199701,5cyclictest27818-21if_eth008:30:181
165199701,35cyclictest12099-21taskset12:48:211
165199691,6cyclictest7881-21chrt09:42:541
165199691,6cyclictest7881-21chrt09:42:541
165199691,6cyclictest7478-21users09:00:301
165199682,35cyclictest31562-21users11:20:301
165199682,34cyclictest27154-21hddtemp_smartct10:40:171
165199681,6cyclictest7240-21chrt12:41:491
165199681,6cyclictest17599-21taskset09:54:031
165199681,6cyclictest15597-21chrt07:57:581
165199681,6cyclictest11742-21chrt07:46:511
165199681,35cyclictest19552-21seq08:09:551
165199671,6cyclictest4686-21chrt12:39:591
165199671,6cyclictest4090-21chrt12:02:351
165199671,6cyclictest22391-21chrt09:59:311
165199671,5cyclictest5799-21chrt08:57:371
165199662,41cyclictest28871-21iostat_ios09:30:201
165199651,5cyclictest3943-21taskset09:38:521
165199651,33cyclictest13823-21uname12:50:211
165199641,7cyclictest26220-21ssh10:39:491
165199641,35cyclictest20419-21ssh10:32:411
165199641,30cyclictest3482-21kworker/1:209:15:591
165199632,38cyclictest2645-21snmpd11:49:201
165199631,39cyclictest10288-21taskset10:20:501
165199631,30cyclictest695-21sed10:10:281
165199622,37cyclictest26891-21seq08:27:591
165199621,6cyclictest25150-21rm12:25:291
165199621,6cyclictest16539-21if_eth008:00:171
165199621,40cyclictest23992-21rm11:12:451
165199621,39cyclictest12539-21sh11:35:301
165199612,41cyclictest29723-21iostat08:35:191
165199611,40cyclictest3302-21runrttasks08:52:571
165199611,38cyclictest3302-21runrttasks10:54:561
165199611,38cyclictest3302-21runrttasks10:54:551
165199611,36cyclictest30496-21packagekitd12:08:411
165199601,39cyclictest3302-21runrttasks10:02:051
165199601,37cyclictest8340-21chrt11:30:431
165199592,38cyclictest2206-21dbus-daemon10:07:521
165199592,33cyclictest8287-40update-apt-xapi07:40:011
165199591,40cyclictest20776-21ssh12:20:311
165199591,39cyclictest13873-21seq07:54:301
165199591,38cyclictest22908-21seq08:15:481
165199581,38cyclictest9804-21seq07:41:101
165199581,35cyclictest20660-21gzip08:10:241
165199551,31cyclictest32673-21chrt08:44:211
95872470,6sleep09588-21/usr/sbin/munin10:20:240
224932400,8sleep0165099cyclictest11:46:520
165099397,12cyclictest0-21swapper/010:00:160
165099396,5cyclictest81rcu_preempt11:19:010
165099382,32cyclictest0-21swapper/009:19:550
165099381,25cyclictest24562-21switchtime08:20:270
165099381,20cyclictest31460-21ssh10:45:130
165099376,14cyclictest2023-21sed11:25:010
165099371,6cyclictest9818-21diskmemload12:22:560
165099371,15cyclictest21973-21ssh09:22:430
12672370,2sleep01265-21ntpq08:45:240
165099361,22cyclictest10362-21/usr/sbin/munin09:45:230
184422350,9sleep0165099cyclictest09:55:100
165099358,4cyclictest0-21swapper/010:15:400
165099352,30cyclictest0-21swapper/010:40:360
1650993512,7cyclictest0-21swapper/010:56:530
165099351,21cyclictest18801-21sh11:43:070
143102351,4sleep014320-21ssh09:14:590
165099342,29cyclictest0-21swapper/012:48:150
165099342,28cyclictest0-21swapper/011:29:150
165099341,30cyclictest0-21swapper/009:25:360
165099341,29cyclictest6785-21aten_r4power_cu11:30:100
165099341,20cyclictest2178-21ssh10:12:270
165099341,12cyclictest15950-21ls08:00:000
165099336,5cyclictest81rcu_preempt10:25:140
165099334,4cyclictest81rcu_preempt11:04:380
165099333,5cyclictest81rcu_preempt12:45:010
165099333,16cyclictest14263-21diskstats09:50:130
165099332,28cyclictest0-21swapper/009:38:150
165099331,4cyclictest9818-21diskmemload11:14:160
1650993314,16cyclictest18032-21unixbench_multi11:05:280
165099331,30cyclictest0-21swapper/008:59:150
1650993310,3cyclictest0-21swapper/012:25:350
78852321,6sleep00-21swapper/009:42:560
78852321,6sleep00-21swapper/009:42:550
71732320,3sleep0111rcuc/007:35:250
165099324,4cyclictest81rcu_preempt12:09:230
165099323,4cyclictest81rcu_preempt12:17:370
165099322,17cyclictest0-21swapper/012:30:260
1650993219,5cyclictest0-21swapper/008:10:570
1650993216,13cyclictest270652chrt08:29:460
165099321,29cyclictest0-21swapper/008:08:550
1650993212,7cyclictest23013-21ntpdc10:35:230
95532311,5sleep00-21swapper/009:07:260
76252311,5sleep00-21swapper/009:01:550
165099318,10cyclictest0-21swapper/010:05:300
165099313,4cyclictest81rcu_preempt12:37:510
165099313,15cyclictest11551-21df11:35:140
165099312,14cyclictest9818-21diskmemload12:50:300
1650993112,16cyclictest0-21swapper/010:50:210
1650993112,16cyclictest0-21swapper/010:50:210
165099311,16cyclictest13393-21grep07:50:280
307402301,5sleep00-21swapper/008:39:000
232902301,5sleep00-21swapper/008:19:440
165099302,4cyclictest81rcu_preempt12:12:000
165099302,14cyclictest2767-21users12:00:290
165099301,4cyclictest81rcu_preempt08:33:450
165099301,16cyclictest26053-21unixbench_multi11:50:280
1650992923,3cyclictest0-21swapper/008:41:350
1650992922,5cyclictest0-21swapper/008:02:150
165099292,13cyclictest10935-21irqstats07:45:200
165099281,15cyclictest2413-21/usr/sbin/munin08:50:110
165099281,14cyclictest9037-21if_eth007:40:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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