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2026-08-25 - 08:06

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 all highest latencies:
System rack9slot4s (updated Tue Aug 25, 2026 00:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81249912601,1255cyclictest0-21swapper/119:25:121
81239911841174,7cyclictest0-21swapper/019:25:110
81249911581136,18cyclictest22736-21smartctl21:25:241
77672564518,31sleep10-21swapper/119:21:491
80302488441,32sleep00-21swapper/019:24:350
812399222213,6cyclictest0-21swapper/021:25:240
327282840,4sleep041ktimersoftd/023:20:110
303472700,4sleep0111rcuc/000:50:010
8124996610,3cyclictest0-21swapper/122:40:231
8124996417,28cyclictest22-21ksoftirqd/119:31:151
812499613,40cyclictest0-21swapper/122:20:231
812499606,35cyclictest0-21swapper/100:20:131
812499601,6cyclictest27357-21cut23:05:161
8124996016,32cyclictest22-21ksoftirqd/120:24:311
812499593,8cyclictest11437-21hddtemp_smartct23:55:131
812499591,14cyclictest8056-21taskset20:46:481
812499589,5cyclictest21620-21cut21:25:021
812499582,7cyclictest22179-21ntp_states22:50:231
8124995812,6cyclictest11767-21taskset20:56:141
8124995811,4cyclictest0-21swapper/120:50:241
812499573,8cyclictest2761-21df_inode22:00:151
8124995713,39cyclictest2225-21dbus-daemon00:25:311
8124995710,8cyclictest250322chrt00:35:121
812499563,8cyclictest15015-21df_inode00:05:161
812499563,8cyclictest14844-21df19:40:141
812499562,9cyclictest14679-21hddtemp_smartct21:05:171
812499562,10cyclictest23346-21users20:00:301
812499561,15cyclictest29847-21irqstats21:45:231
812499561,14cyclictest13851-21aten_r4power_cu22:30:121
812499554,8cyclictest1729-21ntp_states20:30:261
812499553,8cyclictest18596-21df19:50:141
812499553,8cyclictest12596-21df21:00:131
812499551,8cyclictest28033-21runrttasks00:41:401
812499551,14cyclictest17399-21taskset22:39:481
8124995510,6cyclictest21677-21seq19:57:441
8124995510,5cyclictest24784-21seq22:58:211
812499549,5cyclictest26837-21seq21:36:261
812499543,8cyclictest28842-21df00:45:141
812499541,9cyclictest27709-21/usr/sbin/munin20:15:121
8124995412,37cyclictest2654-21sshd00:17:361
812499541,14cyclictest15652sleep123:21:261
812499541,14cyclictest12000-21basename22:25:121
812499541,14cyclictest12000-21basename22:25:111
812499541,13cyclictest169132chrt00:10:171
8124995410,6cyclictest5424-21seq23:31:271
812499534,44cyclictest0-21swapper/122:10:171
812499533,7cyclictest23880-21df21:30:151
812499532,7cyclictest1802-21users21:55:291
812499526,5cyclictest0-21swapper/120:37:471
812499522,7cyclictest29468-21iostat23:10:191
812499522,10cyclictest14397-21munin-run19:40:001
8124995213,36cyclictest24484-21runrttasks00:33:581
812499514,9cyclictest20166-21memory22:45:221
8124995110,37cyclictest0-21swapper/123:35:261
812499507,7cyclictest3286-21runrttasks19:47:111
812499502,12cyclictest0-21swapper/121:40:261
8124995015,31cyclictest22-21ksoftirqd/122:17:221
8124995011,5cyclictest23960-21/usr/sbin/munin20:05:151
8124995011,5cyclictest23960-21/usr/sbin/munin20:05:141
812499501,10cyclictest31766-21df_inode20:25:141
812499494,10cyclictest31411-21diskstats21:50:141
812499493,8cyclictest0-21swapper/122:05:141
812499493,6cyclictest30439-21/usr/sbin/munin00:50:271
812499493,6cyclictest2082-21/usr/sbin/munin23:25:311
812499492,7cyclictest5608-21ntp_states20:40:241
812499492,7cyclictest18542-21iostat21:15:201
812499492,6cyclictest31247-21hddtemp_smartct23:15:181
812499492,43cyclictest8321-21hddtemp_smartct23:40:191
8124994914,31cyclictest10615-21runrttasks23:53:121
812499482,8cyclictest16898-21ntp_states21:10:231
8124994810,6cyclictest3286-21runrttasks20:12:001
812499479,4cyclictest0-21swapper/123:45:551
812499472,7cyclictest25419-21df_inode23:00:151
8124994710,4cyclictest0-21swapper/100:00:081
292152430,8sleep0812399cyclictest21:45:010
29062420,8sleep0812399cyclictest20:35:120
812399372,11cyclictest81rcu_preempt23:59:330
128882371,32sleep012969-21python22:25:270
128882371,32sleep012969-21python22:25:270
127472351,29sleep00-21swapper/019:35:130
812399341,8cyclictest19038-21sshd22:42:090
812399341,20cyclictest5292-21/usr/sbin/munin20:40:170
812399341,13cyclictest0-21swapper/021:21:230
812399339,11cyclictest19596-21cpu22:45:110
812399338,13cyclictest1974-21lldpad00:02:360
812399332,19cyclictest6783-21hddtemp_smartct22:10:150
198262331,29sleep019829-21watchsnmpd19:53:010
812399327,11cyclictest8518-21cut22:15:150
812399326,5cyclictest81rcu_preempt20:10:120
812399322,16cyclictest32304-21ntp_states20:25:250
8123993214,5cyclictest10568-21hddtemp_smartct22:20:180
812399321,12cyclictest9110-21runrttasks23:40:340
8123993210,7cyclictest0-21swapper/022:31:140
812399313,4cyclictest81rcu_preempt23:05:110
812399313,14cyclictest2702-21irqstats23:25:200
8123993123,5cyclictest3342-21tr22:00:240
8123993112,6cyclictest10399-21users19:30:030
8123993112,5cyclictest22970-21runrttasks00:30:130
812399303,15cyclictest29366-21hddtemp_smartct23:10:170
812399302,15cyclictest1735-21ntp_states20:30:260
812399302,15cyclictest0-21swapper/021:50:110
812399301,4cyclictest81rcu_preempt23:31:300
812399301,4cyclictest81rcu_preempt00:20:440
812399301,4cyclictest81rcu_preempt00:10:290
812399301,4cyclictest81rcu_preempt00:05:180
812399301,25cyclictest4634-21grep22:05:130
812399301,24cyclictest24057-21ntp_states22:55:240
8123993011,6cyclictest26702-21head21:35:290
812399301,10cyclictest81rcu_preempt21:15:430
812399299,7cyclictest0-21swapper/022:38:230
812399298,7cyclictest30951-21cron21:50:000
812399293,4cyclictest81rcu_preempt21:11:530
812399293,23cyclictest23062-21cron22:55:000
812399292,14cyclictest27711-21aten_r4power_cu20:15:120
812399291,4cyclictest81rcu_preempt23:52:030
8123992913,5cyclictest31247-21hddtemp_smartct23:15:180
812399291,17cyclictest30412-21/usr/sbin/munin20:20:250
812399291,15cyclictest584-21grep21:55:120
264332291,5sleep00-21swapper/023:00:520
235032291,5sleep00-21swapper/020:02:010
180952291,5sleep00-21swapper/019:49:290
157542291,5sleep00-21swapper/021:08:310
138092291,5sleep00-21swapper/021:02:480
812399289,7cyclictest30902-21grep00:50:160
812399282,14cyclictest0-21swapper/000:28:560
812399281,15cyclictest7232-21/usr/sbin/munin20:45:180
8123992811,5cyclictest6660-21ls23:35:330
250852281,5sleep00-21swapper/021:32:430
246162280,7sleep0812399cyclictest20:05:210
246162280,7sleep0812399cyclictest20:05:210
189172281,5sleep00-21swapper/000:19:500
8123992711,4cyclictest21203-21python19:55:290
812399271,13cyclictest26882-21/usr/sbin/munin00:40:140
8123992710,4cyclictest11074-21latency20:55:200
262492271,5sleep00-21swapper/000:37:490
158902271,5sleep00-21swapper/019:41:040
100962271,4sleep00-21swapper/023:49:210
812399261,4cyclictest81rcu_preempt20:50:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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