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2026-09-17 - 13:41

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 Thu Sep 17, 2026 00:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5029912891,1283cyclictest1130-21perl19:25:140
325732785738,32sleep00-21swapper/019:21:280
4372501457,29sleep10-21swapper/119:24:541
50399132122,7cyclictest0-21swapper/119:25:141
249082860,6sleep024909-21basename00:45:100
101212860,8sleep050299cyclictest19:45:290
50299761,40cyclictest3907-21watchsnmpd22:21:000
50299713,37cyclictest15989-21iostat_ios00:20:200
502997118,35cyclictest26325-21ntp_states21:55:240
50299691,6cyclictest3250-21grep20:55:160
50299691,6cyclictest14596-21cut20:00:100
50299681,6cyclictest8498-21taskset00:00:200
50299681,5cyclictest15236-21python21:25:280
502996815,33cyclictest16020-21df_inode22:55:150
50299672,44cyclictest19217-21/usr/sbin/munin00:30:140
50299671,6cyclictest28008-21taskset00:50:500
50299671,40cyclictest31054-21cstates23:35:140
50299653,46cyclictest5091-21df21:00:130
50299651,5cyclictest13184-21taskset00:13:300
50299651,4cyclictest30543-21seq22:05:320
502996512,29cyclictest3286-21runrttasks23:30:080
50299649,38cyclictest24988-21python20:25:270
50299641,37cyclictest12249-21cstates22:45:130
50299632,5cyclictest8455-21cat22:35:130
50299632,40cyclictest29939-21fschecks_count20:40:140
50299623,36cyclictest0-21swapper/020:05:230
50299622,55cyclictest27749-21fschecks_count22:00:140
50299622,55cyclictest27749-21fschecks_count22:00:140
50299621,4cyclictest19143-21/usr/sbin/munin20:10:230
50299617,34cyclictest26938-21sort20:30:280
50299614,41cyclictest31631-21hddtemp_smartct22:10:160
50299613,50cyclictest23900-21df21:50:110
50299613,36cyclictest21924-21munin-run20:20:000
502996113,32cyclictest8859-21df_inode21:10:140
50299601,40cyclictest6343-21aten_r4power_cu22:30:100
50299601,36cyclictest32183-21/usr/sbin/munin20:45:220
50299601,34cyclictest14412-21awk19:59:590
502996012,31cyclictest24511-21/usr/sbin/munin23:15:300
50299592,5cyclictest26243-21timerandwakeup23:20:260
50299591,5cyclictest11822-21python19:50:280
50299591,41cyclictest10187-21fschecks_time00:05:200
50299591,38cyclictest18821-21taskset00:28:200
50299591,36cyclictest1840-21users22:15:340
502995911,31cyclictest16696-21/usr/sbin/munin21:30:190
50299586,31cyclictest8397-21chrt19:41:110
50299582,36cyclictest4581-21hddtemp_smartct23:50:160
50299581,43cyclictest24032-21sed00:40:270
50299581,37cyclictest20455-21interrupts21:40:210
50299581,37cyclictest18715-21timerandwakeup23:00:270
50299578,28cyclictest12910-21if_eth021:20:170
50299578,27cyclictest23609-21taskset20:22:560
50299577,28cyclictest22877-21seq23:12:490
50299572,35cyclictest0-21swapper/021:05:180
50299571,5cyclictest15344-21cat00:20:000
50299571,37cyclictest3274-21/usr/sbin/munin19:30:220
50299571,34cyclictest27377-21grep23:25:150
502995710,26cyclictest4961-21time22:25:170
50299561,37cyclictest21201-21taskset23:09:540
50299561,35cyclictest21318-21diskstats00:35:150
50299561,35cyclictest21318-21diskstats00:35:150
50299561,34cyclictest29037-21seq20:35:520
50299553,45cyclictest14152-21diskstats22:50:150
50299551,36cyclictest7147-21grep23:55:280
50299542,40cyclictest5157-21/usr/sbin/munin19:35:160
50299542,38cyclictest1049-21ntp_states23:40:250
50299541,38cyclictest22027-21df21:45:110
50299541,36cyclictest2421-21diskstats23:45:150
50299541,33cyclictest19281-21taskset21:35:480
50299541,31cyclictest11899-21seq21:17:180
50299532,38cyclictest10927-21ntp_states22:40:220
50299531,7cyclictest1319-21fschecks_time20:50:170
183962531,31sleep118559-21cat20:10:121
160432520,2sleep116042-21forks22:55:161
252392450,8sleep150399cyclictest20:25:291
50399366,27cyclictest3286-21runrttasks00:25:191
50399355,5cyclictest81rcu_preempt23:05:181
265272351,4sleep111038-21snmpd23:21:311
50399341,9cyclictest23232-21runrttasks21:47:421
216142331,5sleep10-21swapper/120:16:561
74752321,27sleep17513-21ntp_states21:05:261
50399322,27cyclictest20355-21tune2fs21:40:181
503993212,17cyclictest23287-21basename23:15:131
63062311,5sleep10-21swapper/121:02:481
50399312,16cyclictest7640-21iostat19:40:171
50399311,20cyclictest0-21swapper/121:32:171
270242311,5sleep10-21swapper/121:58:071
265162311,5sleep10-21swapper/100:49:501
237452311,5sleep10-21swapper/120:24:221
189792311,5sleep10-21swapper/123:01:171
178512311,5sleep10-21swapper/120:06:461
158162311,5sleep10-21swapper/121:28:501
65402301,5sleep10-21swapper/119:36:381
57772301,5sleep10-21swapper/123:54:471
50399307,13cyclictest40250irq/92-i91519:50:291
50399303,21cyclictest21711-21memory00:35:231
50399303,21cyclictest21711-21memory00:35:221
38492301,5sleep10-21swapper/123:49:121
309792301,5sleep10-21swapper/120:41:211
289812301,5sleep10-21swapper/122:03:491
289812301,5sleep10-21swapper/122:03:481
249532301,5sleep10-21swapper/121:51:041
21562301,5sleep10-21swapper/122:18:361
18512301,5sleep10-21swapper/123:44:051
161372301,5sleep10-21swapper/120:03:281
153482301,5sleep10-21swapper/122:52:441
115362301,5sleep10-21swapper/122:42:071
110392301,5sleep10-21swapper/100:05:441
99532291,5sleep10-21swapper/121:11:381
97502291,5sleep10-21swapper/122:38:171
81422291,5sleep10-21swapper/100:00:141
503992911,5cyclictest26812-21cpu00:50:101
50399291,15cyclictest18574-21iostat_ios21:35:201
50399291,14cyclictest0-21swapper/123:35:131
503992910,6cyclictest304562unixbench_multi22:05:291
38872291,5sleep10-21swapper/122:20:501
27122291,4sleep12902-21iostat19:30:031
148652291,5sleep10-21swapper/100:16:301
133182291,5sleep10-21swapper/100:14:561
103532291,5sleep10-21swapper/119:47:021
50399281,15cyclictest23411-21hddtemp_smartct00:40:161
50399281,15cyclictest22400-21smartctl23:10:291
3072281,5sleep10-21swapper/122:14:131
294162281,5sleep10-21swapper/120:39:501
137842281,5sleep10-21swapper/121:22:101
50399279,14cyclictest0-21swapper/121:15:221
503992716,6cyclictest28069-21sort23:25:291
50399271,12cyclictest2291-21irqbalance20:30:281
25352271,5sleep10-21swapper/120:53:401
207652271,5sleep10-21swapper/100:34:021
133932271,5sleep10-21swapper/122:46:551
50399262,9cyclictest5053-21irqstats22:25:201
50399262,20cyclictest0-21swapper/123:30:141
503992617,6cyclictest22-21ksoftirqd/119:55:261
170372261,5sleep10-21swapper/100:24:201
80312251,3sleep10-21swapper/122:34:571
74692251,5sleep10-21swapper/123:57:551
50399252,9cyclictest4298-21sshd20:56:371
503992412,10cyclictest0-21swapper/120:46:451
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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