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2026-08-27 - 12:54

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 Aug 27, 2026 00:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
151659911121085,23cyclictest17162-21munin-node19:30:011
148332809762,31sleep10-21swapper/119:22:041
147682705656,34sleep00-21swapper/019:21:230
1516499204140,41cyclictest17201-21latency_hist19:30:010
324842700,5sleep00-21swapper/000:25:210
15165995814,7cyclictest20121-21runrttasks23:52:371
1516599562,11cyclictest0-21swapper/100:05:251
1516599532,9cyclictest3286-21runrttasks21:27:451
128582520,8sleep00-21swapper/023:35:010
15165995111,12cyclictest2225-21dbus-daemon20:10:571
1516599505,9cyclictest13642-21diskstats22:10:141
1516599502,15cyclictest13701-21/usr/sbin/munin20:45:291
1516599501,10cyclictest3062-21pidof00:35:001
1516599481,18cyclictest14879-21/usr/sbin/munin23:40:231
140112471,34sleep014176-21cut20:45:160
15165994618,5cyclictest22788-21cut00:00:151
1516599461,7cyclictest12316-21grep23:30:301
15165994614,6cyclictest17038-21runrttasks20:52:171
1516599457,15cyclictest16421-21unixbench_multi22:15:291
1516599452,8cyclictest6290-21ntp_states23:15:261
1516599451,7cyclictest9419-21watchsnmpd22:00:001
1516599442,8cyclictest10281-21memory22:00:211
1516599441,9cyclictest4020-21fschecks_time23:10:151
1516599441,9cyclictest21958-21timerandwakeup22:30:281
1516599441,7cyclictest4916-21kernelversion20:20:221
1516599441,7cyclictest27653-21cut21:20:241
15165994412,8cyclictest25851-21unixbench_multi22:40:251
1516599439,8cyclictest28450-21unixbench_singl19:55:301
1516599432,8cyclictest5943-21ntp_states00:40:231
1516599432,7cyclictest1886-21df_inode23:05:131
1516599431,4cyclictest81rcu_preempt19:44:501
15165994311,8cyclictest4129-21idleruntime-cro20:20:001
1516599422,7cyclictest4535-21iostat21:45:181
1516599421,7cyclictest22080-21taskset23:58:271
1516599421,18cyclictest0-21swapper/122:29:131
1516599412,7cyclictest20623-21users21:00:311
15165994110,9cyclictest32504-21fschecks_count23:00:151
15165994010,8cyclictest31397-21needreboot21:30:261
192162390,6sleep019192-21pidof21:00:000
1516499394,17cyclictest12841-21python20:40:260
1516599381,7cyclictest32406-21iostat_ios00:25:201
1516599377,7cyclictest20920-21grep19:35:291
1516499371,23cyclictest16684-21/usr/sbin/munin20:50:280
202892350,2sleep020288-21cut21:00:260
188352351,5sleep018907-21sed22:25:000
1516499351,30cyclictest4553-21grep23:10:260
173762341,29sleep017454-21iostat19:30:020
1516499342,12cyclictest0-21swapper/023:40:100
218702331,4sleep011565-21gdbus23:56:170
1516499339,12cyclictest10759-21ntp_states20:35:250
1516499332,27cyclictest109292sleep022:01:050
88592321,9sleep00-21swapper/023:22:530
1516499321,4cyclictest81rcu_preempt23:00:040
15164993213,6cyclictest23393-21df21:10:120
15164993212,9cyclictest0-21swapper/022:40:090
15164993212,7cyclictest29592-21ntp_states21:25:250
1516499321,19cyclictest8338-21df_inode20:30:140
1516599315,4cyclictest81rcu_preempt20:42:521
1516599315,4cyclictest81rcu_preempt20:31:371
1516599311,6cyclictest81rcu_preempt21:42:171
1516499314,13cyclictest11565-21gdbus00:24:370
1516499314,12cyclictest11565-21gdbus23:39:490
1516499312,15cyclictest19383-21tr23:50:230
1516499312,14cyclictest3060-21munin-run00:35:000
1516499312,14cyclictest1886-21df_inode23:05:130
15164993112,6cyclictest1071-21python21:35:270
15164993112,6cyclictest1071-21python21:35:260
1516499311,19cyclictest0-21swapper/021:59:170
1516499311,16cyclictest27058-21cron19:55:010
184642301,5sleep00-21swapper/023:49:550
174292303,24sleep117490-21fschecks_count22:20:171
1516599305,4cyclictest81rcu_preempt23:21:461
1516599305,4cyclictest81rcu_preempt22:49:541
1516599301,4cyclictest81rcu_preempt20:08:221
1516499309,6cyclictest11565-21gdbus19:44:530
1516499304,13cyclictest30439-21tr22:55:120
1516499303,4cyclictest81rcu_preempt21:09:530
1516499302,15cyclictest24306-21ntp_states19:45:250
1516499302,15cyclictest1008-21iostat_ios20:10:200
15164993020,6cyclictest14294-21sendmail_mailqu22:10:260
1516499301,4cyclictest81rcu_preempt21:23:110
1516499301,4cyclictest81rcu_preempt20:00:370
15164993012,6cyclictest31493-21hddtemp_smartct20:05:190
1516499301,14cyclictest19493-21/usr/sbin/munin22:25:160
15164993010,6cyclictest11676-21grep22:05:110
47732291,5sleep00-21swapper/000:38:210
1516599294,4cyclictest81rcu_preempt22:56:101
1516499292,16cyclictest0-21swapper/021:30:260
1516499292,14cyclictest23241-21ntp_states00:00:250
1516499292,13cyclictest28634-21iostat_ios00:15:180
1516499291,4cyclictest81rcu_preempt21:41:290
1516499291,24cyclictest24238-21chrt22:37:380
15164992911,6cyclictest5401-21df00:40:120
1516499291,15cyclictest7170-21cron23:20:000
1516499291,14cyclictest21377-21hddtemp_smartct22:30:170
1516599286,4cyclictest81rcu_preempt20:01:301
1516599286,4cyclictest81rcu_preempt00:17:301
1516599285,4cyclictest81rcu_preempt20:39:551
1516599284,3cyclictest81rcu_preempt22:08:041
1516599283,4cyclictest81rcu_preempt22:38:221
1516599283,4cyclictest81rcu_preempt20:58:481
1516599281,4cyclictest81rcu_preempt19:32:301
15165992811,5cyclictest10029-21ntp_kernel_pll_23:25:241
1516599281,13cyclictest25694-21fschecks_count19:50:151
1516499283,18cyclictest4583-21df20:20:140
1516499283,17cyclictest0-21swapper/000:10:050
1516499282,13cyclictest27693-21perl19:55:160
1516499282,13cyclictest25088-21grep00:05:270
15164992816,7cyclictest16437-21sed22:15:290
15164992811,5cyclictest4535-21/usr/sbin/munin21:45:190
1516499281,15cyclictest25791-21/usr/sbin/munin21:15:230
1516499281,14cyclictest6977-21/usr/sbin/munin20:25:230
1516499281,14cyclictest26702-21sort22:45:100
1516499281,14cyclictest19979-21df19:35:130
1516499281,13cyclictest4188-21latency_hist20:19:590
15164992810,5cyclictest30186-21latency_hist22:55:000
76972271,5sleep00-21swapper/000:50:480
72552271,5sleep00-21swapper/000:47:400
72542271,5sleep00-21swapper/021:52:070
1516599279,14cyclictest3286-21runrttasks21:12:101
1516599277,4cyclictest81rcu_preempt00:12:281
1516599276,4cyclictest81rcu_preempt00:21:211
1516599272,4cyclictest81rcu_preempt23:36:381
1516599271,6cyclictest0-21swapper/122:50:181
1516599271,12cyclictest22971-21munin-run21:10:001
106542271,5sleep00-21swapper/023:27:010
1516599267,6cyclictest0-21swapper/100:54:111
1516599265,4cyclictest81rcu_preempt19:46:311
1516599264,4cyclictest81rcu_preempt21:51:091
1516599264,4cyclictest81rcu_preempt20:26:331
1516599261,8cyclictest3413-21grep00:35:111
1516599261,4cyclictest81rcu_preempt00:45:351
1516599253,16cyclictest343-21diskstats21:35:141
1516599253,16cyclictest343-21diskstats21:35:131
253342241,4sleep181rcu_preempt21:15:161
1516599241,20cyclictest0-21swapper/123:45:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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