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2026-06-26 - 16:16

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 highest latencies:
System rack9slot4s (updated Fri Jun 26, 2026 12:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
243269912371199,34cyclictest23639-21smartctl08:45:180
243279911371104,26cyclictest25490-21smartctl07:25:251
243279910791062,14cyclictest4867-21strings07:55:241
242082526480,31sleep00-21swapper/007:24:180
225572437392,29sleep10-21swapper/107:20:041
2432699254230,21cyclictest0-21swapper/007:25:250
2432699187178,6cyclictest0-21swapper/007:55:240
2555721550,2sleep125556-21processes10:15:251
24327998778,6cyclictest0-21swapper/108:45:181
24326998211,31cyclictest9634-21fschecks_count11:00:150
2432699741,6cyclictest13441-21cut11:10:160
2432699711,42cyclictest30307-21sort11:55:130
2432699701,37cyclictest11025-21chrt09:36:540
24326997012,36cyclictest15926-21switchtime11:15:280
90062680,3sleep19005-21users09:30:291
2432699651,45cyclictest24604-21df11:40:110
2432699646,37cyclictest1244-21grep09:10:280
24326996411,31cyclictest12585-21cat09:40:280
24326996211,32cyclictest26992-21wc07:30:070
2432699618,32cyclictest0-21swapper/010:50:220
2432699608,34cyclictest32480-21taskset07:44:220
2432699607,5cyclictest29574-21ls10:25:280
2432699601,41cyclictest18697-21taskset09:58:250
2432699601,39cyclictest19757-21tune2fs08:35:150
2432699592,36cyclictest23770-21taskset11:36:150
2432699591,37cyclictest25128-21fschecks_time10:15:150
2432699589,32cyclictest25472-21sort08:50:170
2432699582,6cyclictest8573-21ntp_states09:30:250
2432699581,39cyclictest31975-21taskset09:05:440
2432699581,39cyclictest2858-21latency07:50:200
2432699581,39cyclictest14812-21taskset09:47:020
2432699581,37cyclictest11067-21sh12:30:120
2432699581,35cyclictest3286-21runrttasks12:05:060
2432699572,6cyclictest2014-21aten_r4power_en09:15:100
2432699572,41cyclictest538-21diskstats07:45:150
2432699571,7cyclictest11144-21unixbench_multi08:10:290
2432699571,5cyclictest15001-21grep12:40:150
24326995711,29cyclictest7199-21unixbench_multi08:00:290
2432699562,39cyclictest4298-21/usr/sbin/munin09:20:140
2432699561,5cyclictest30803-21cut07:40:010
2432699561,40cyclictest17915-21timerwakeupswit11:20:290
2432699555,6cyclictest14418-21cat08:20:200
2432699552,6cyclictest27582-21python10:20:270
2432699552,46cyclictest8198-21ntp_states10:55:230
2432699551,6cyclictest23040-21date08:45:000
2432699551,6cyclictest15668-21cut09:50:150
2432699551,6cyclictest11763-21uname11:05:210
24326995511,31cyclictest4225-21/usr/sbin/munin10:45:210
2432699541,7cyclictest30218-21taskset09:02:000
2432699541,7cyclictest2695-21snmpd08:28:570
2432699541,7cyclictest19654-21uname10:00:210
2432699541,7cyclictest18147-21chrt12:49:440
2432699541,6cyclictest8133-21wc12:20:280
2432699541,6cyclictest6475-21uname09:25:210
2432699541,6cyclictest27777-21taskset11:48:380
2432699541,6cyclictest27524-21kernelversion08:55:210
2432699541,6cyclictest19536-21grep12:50:290
2432699541,5cyclictest32205-21cut10:35:110
2432699541,5cyclictest12897-21wc08:15:280
2432699541,5cyclictest10104-21unixbench_multi12:25:280
24326995410,38cyclictest6288-21sort12:15:290
2432699537,30cyclictest22284-21seq10:06:310
2432699531,7cyclictest31639-21taskset10:30:590
2432699531,6cyclictest9125-21wc08:05:290
2432699531,6cyclictest396-21python12:00:270
2432699531,6cyclictest21630-21grep11:30:280
2432699531,6cyclictest19360-21grep11:25:210
2432699531,6cyclictest18508-21python08:30:270
2432699531,6cyclictest1676-21cut10:40:110
2432699531,6cyclictest13320-21wc12:35:210
2432699521,6cyclictest4302-21ls12:10:270
2432699521,6cyclictest22850-21cut10:10:110
2432699521,4cyclictest28770-21grep11:50:210
24327993610,5cyclictest81rcu_preempt08:40:161
24327993526,6cyclictest3652-21aten_r4power_en10:45:121
200452341,29sleep120111-21cut12:55:001
150412331,4sleep115052-21sh12:40:161
111352330,2sleep111134-21fschecks_count12:30:141
2432799324,20cyclictest32491-21diskstats10:35:161
24327993215,5cyclictest40250irq/92-i91508:15:001
2432799321,10cyclictest81rcu_preempt12:39:241
16562321,27sleep11791-21egrep10:40:111
152472321,5sleep10-21swapper/108:22:551
2432799318,12cyclictest40250irq/92-i91512:23:221
2432799312,25cyclictest3286-21runrttasks11:09:291
2432799311,5cyclictest0-21swapper/110:25:161
2432799311,17cyclictest20758-21taskset08:36:411
2432799311,16cyclictest21140-21iostat_ios11:30:201
150202311,4sleep12695-21snmpd09:49:121
2432799304,10cyclictest29095-21diskstats09:00:141
2432799301,8cyclictest4307-21fschecks_count09:20:141
2432799301,16cyclictest28078-21chrt10:22:571
2432799301,16cyclictest1763-21hddtemp_smartct12:05:171
2432799301,10cyclictest81rcu_preempt07:40:451
69582291,5sleep10-21swapper/110:52:251
267082291,5sleep10-21swapper/108:54:441
2432799294,18cyclictest6463-21iostat_ios09:25:211
2432799294,18cyclictest13709-21memory11:10:221
2432799292,6cyclictest7450-21apt-get08:02:171
2432799291,4cyclictest81rcu_preempt12:10:571
2432799291,4cyclictest81rcu_preempt11:02:351
2432799291,4cyclictest81rcu_preempt10:02:151
2432799291,14cyclictest16975-21cron09:55:011
2432799291,14cyclictest15493-21irqstats11:15:201
2432799290,4cyclictest81rcu_preempt09:56:081
89792281,5sleep10-21swapper/110:59:001
323222281,5sleep10-21swapper/109:09:221
315072281,5sleep10-21swapper/111:58:221
281992281,5sleep10-21swapper/108:55:421
246712281,23sleep124806-21fw_packets11:40:151
2432799283,21cyclictest0-21swapper/107:30:161
2432799281,5cyclictest81rcu_preempt09:13:301
2432799281,4cyclictest81rcu_preempt07:47:561
2432799281,14cyclictest30913-21iostat_ios10:30:181
24327992810,5cyclictest40250irq/92-i91511:45:231
24327992810,14cyclictest131082chrt08:15:301
2432799280,4cyclictest81rcu_preempt12:04:541
104822281,5sleep10-21swapper/112:28:361
2432799271,22cyclictest12112-21irqstats09:40:201
2432799271,13cyclictest1981-21/usr/sbin/munin09:15:291
239962271,4sleep10-21swapper/111:38:371
21262271,5sleep10-21swapper/107:50:061
244212261,5sleep10-21swapper/110:14:121
2432799269,5cyclictest40250irq/92-i91511:20:281
2432799262,9cyclictest16759-21diskstats12:45:151
2432799262,10cyclictest10203-21iostat09:35:181
2432799254,15cyclictest5433-21diskstats12:15:161
2432799252,20cyclictest0-21swapper/110:09:161
2432799252,19cyclictest0-21swapper/111:50:181
2432799251,10cyclictest17783-21df_inode08:30:151
202602251,5sleep10-21swapper/111:28:491
170992251,5sleep10-21swapper/108:27:391
24327992416,5cyclictest22-21ksoftirqd/107:35:331
24327992414,6cyclictest9276-21tail08:05:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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