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2026-09-04 - 16:08

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 Fri Sep 04, 2026 12:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
208969912601230,19cyclictest0-21swapper/007:25:110
208979911351108,23cyclictest24719-21users08:55:291
205242565518,32sleep10-21swapper/107:21:401
205812563517,31sleep00-21swapper/007:22:160
2089699220199,4cyclictest0-21swapper/008:55:290
2089799157151,3cyclictest21063-21wget07:25:111
2089799722,35cyclictest19987-21df_inode08:45:131
2089799711,38cyclictest30303-21ntp_states07:45:241
2089799701,39cyclictest5128-21fschecks_time08:05:161
2089799701,37cyclictest3834-21taskset09:26:561
2089799691,35cyclictest32158-21ntp_kernel_pll_07:50:221
2089799691,33cyclictest5228-21chrt10:55:451
2089799682,32cyclictest21520-21diskstats10:15:161
2089799682,31cyclictest6050-21irqstats12:25:211
2089799682,31cyclictest5117-21ntp_states09:30:221
2089799682,31cyclictest2415-21ntp_states12:15:241
2089799681,36cyclictest13562-21latency_hist09:55:011
2089799681,36cyclictest11038-21snmpd12:50:021
2089799681,35cyclictest29221-21ntp_offset12:00:241
2089799681,35cyclictest12775-21iostat_ios08:25:201
2089799681,33cyclictest7108-21chrt11:00:341
2089799681,32cyclictest10236-21latency11:10:251
2089799673,34cyclictest16030-21fschecks_time10:00:161
2089799672,30cyclictest23954-21ntp_states10:20:251
2089799672,30cyclictest23954-21ntp_states10:20:251
2089799672,30cyclictest23242-21hddtemp_smartct11:45:161
2089799672,30cyclictest13847-21hddtemp_smartct11:20:181
2089799671,37cyclictest17708-21latency_hist08:40:011
2089799671,35cyclictest8205-21wc12:30:231
2089799671,34cyclictest444-21needreboot12:10:211
2089799671,34cyclictest3664-21aten_r4power_vo12:20:121
2089799671,34cyclictest343-21diskstats10:45:141
2089799671,34cyclictest3286-21runrttasks11:30:221
2089799671,33cyclictest30642-21chrt09:13:061
2089799671,33cyclictest26332-21chrt11:54:561
2089799671,33cyclictest26332-21chrt11:54:551
2089799671,33cyclictest20972-21chrt10:14:081
2089799671,33cyclictest19144-21chrt08:40:571
2089799671,33cyclictest12008-21chrt08:24:581
2089799671,32cyclictest761-21/usr/sbin/munin07:55:141
2089799671,32cyclictest28182-21taskset10:30:491
2089799671,32cyclictest27214-21xargs07:38:251
2089799671,32cyclictest1768-21chrt09:21:021
2089799671,31cyclictest30926-21df10:40:131
2089799671,31cyclictest23099-21hddtemp_smartct07:30:031
2089799671,31cyclictest10218-21df09:45:111
2089799662,33cyclictest21877-21diskstats08:50:151
2089799662,33cyclictest21877-21diskstats08:50:141
2089799661,34cyclictest19129-21sshd10:09:341
2089799661,33cyclictest6459-21diskstats09:35:131
2089799661,33cyclictest28477-21ps07:40:261
2089799661,33cyclictest27822-21iostat09:05:191
2089799661,33cyclictest12278-21ntp_states11:15:211
2089799661,31cyclictest13003-21chrt12:45:061
2089799661,30cyclictest15820-21iostat_ios11:25:201
2089799652,34cyclictest7212-21memory08:10:221
2089799651,30cyclictest25684-21memory10:25:211
2089799651,30cyclictest21174-21diskstats11:40:151
2089799642,29cyclictest26617-21users09:00:281
2089799641,34cyclictest11902-21ntp_kernel_pll_12:40:231
20897996411,31cyclictest3286-21runrttasks09:44:311
2089799631,39cyclictest3116-21tune2fs08:00:151
2089799631,33cyclictest15890-21latency_hist08:35:001
2089799631,31cyclictest2552-21cat10:50:211
2089799631,30cyclictest31564-21cat09:15:171
2089799631,29cyclictest19574-21irqstats11:35:201
2089799621,31cyclictest29327-21cat10:35:181
2089799621,31cyclictest10237-21latency_hist08:20:011
2089799621,29cyclictest8382-21memory11:05:211
2089799621,29cyclictest8382-21memory11:05:201
2089799611,28cyclictest10770-21taskset12:38:331
2089799591,41cyclictest27817-21chrt11:55:521
2089799581,40cyclictest31629-21seq12:06:191
2089799551,34cyclictest3286-21runrttasks09:56:551
271192490,23sleep03-21ksoftirqd/007:38:250
152172380,5sleep0111rcuc/008:30:290
311452350,9sleep02089699cyclictest10:40:170
2089699352,20cyclictest11565-21gdbus09:47:140
2089699351,21cyclictest31102-21ntp_states12:05:230
2089699351,21cyclictest25157-21hwlatdetect11:50:210
2089699351,21cyclictest25157-21hwlatdetect11:50:210
2089699351,15cyclictest0-21swapper/007:34:590
2089699347,4cyclictest40250irq/92-i91509:12:170
2089699344,9cyclictest27884-21python10:30:250
2089699342,14cyclictest12834-21munin-run12:45:000
2089699341,21cyclictest19994-21diskstats08:45:140
2089699341,21cyclictest1116-21memory09:20:210
56822331,9sleep00-21swapper/009:31:390
2089699338,13cyclictest24310-21taskset11:48:220
2089699331,13cyclictest50772sort10:55:280
2089699331,11cyclictest0-21swapper/011:57:520
245612321,5sleep00-21swapper/010:22:100
245612321,5sleep00-21swapper/010:22:100
2089699327,4cyclictest81rcu_preempt12:40:000
2089699325,4cyclictest81rcu_preempt11:00:260
2089699323,15cyclictest1320-21users10:45:280
2089699322,4cyclictest81rcu_preempt11:39:590
20896993216,12cyclictest12282-21fschecks_time09:50:180
2089699321,13cyclictest0-21swapper/009:42:230
264902311,5sleep00-21swapper/010:27:460
2089699319,11cyclictest2225-21dbus-daemon11:09:410
2089699319,11cyclictest2225-21dbus-daemon11:09:400
2089699318,11cyclictest16231-21cut11:25:260
2089699311,26cyclictest36202sleep010:53:330
2089699311,19cyclictest13165-21grep12:45:110
2089699310,4cyclictest81rcu_preempt12:00:130
20702311,5sleep00-21swapper/007:55:370
289202301,9sleep00-21swapper/007:40:590
2089699309,17cyclictest324492chrt09:17:210
2089699309,10cyclictest0-21swapper/011:42:280
2089699308,18cyclictest3892chrt07:52:550
2089699306,12cyclictest11912-21cut11:15:130
2089699302,15cyclictest18107-21df08:40:120
2089699302,14cyclictest8994-21irqstats08:15:170
2089699302,14cyclictest16180-21iostat10:00:200
2089699302,13cyclictest21067-21munin-run10:15:000
20896993011,6cyclictest6465-21/usr/sbin/munin12:25:290
2089699301,12cyclictest3204-21ntp_kernel_err09:25:220
136302301,5sleep00-21swapper/008:27:200
88502291,5sleep00-21swapper/012:33:040
32012291,5sleep00-21swapper/012:18:080
2089699295,12cyclictest3888-21taskset12:20:160
2089699292,4cyclictest81rcu_preempt11:31:120
2089699292,22cyclictest18150-21memory10:05:200
2089699291,4cyclictest81rcu_preempt09:07:370
2089699291,4cyclictest81rcu_preempt09:00:270
2089699291,4cyclictest81rcu_preempt08:05:010
2089699291,13cyclictest29660-21processes10:35:270
2089699291,12cyclictest23144-21runrttasks08:53:280
2089699291,12cyclictest23144-21runrttasks08:53:280
162332291,5sleep00-21swapper/012:51:140
13192291,5sleep00-21swapper/012:14:130
95702281,5sleep00-21swapper/011:10:110
76172281,5sleep00-21swapper/009:37:190
41242281,5sleep00-21swapper/008:01:140
307102281,5sleep00-21swapper/007:45:290
225152281,5sleep00-21swapper/010:15:390
2089699282,14cyclictest11565-21gdbus09:56:440
2089699282,13cyclictest13633-21df11:20:140
2089699281,14cyclictest10895-21iostat_ios08:20:190
174872281,5sleep00-21swapper/008:38:280
2089699272,8cyclictest7021-21hddtemp_smartct08:10:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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