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2026-09-24 - 22:42

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 Thu Sep 24, 2026 12:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
143919911711142,26cyclictest0-21swapper/107:25:131
143909911681113,51cyclictest14825-21df_inode07:25:130
140092563518,30sleep10-21swapper/107:21:361
140082562517,30sleep00-21swapper/007:21:350
2056021270,7sleep01439099cyclictest09:04:590
1439199556,16cyclictest27254-21if_err_eth007:55:181
1439199554,23cyclictest29402-21/usr/sbin/munin12:20:251
1439199546,14cyclictest1971-21users12:30:331
1439199544,16cyclictest24719-21grep10:40:191
1439199535,16cyclictest25931-21df12:10:181
1439199535,14cyclictest2620-21aten_r4power_cu12:35:101
1439199534,16cyclictest18606-21hddtemp_smartct11:50:181
1439199525,16cyclictest17153-21cat10:20:181
1439199524,16cyclictest31634-21chrt09:33:011
1439199524,15cyclictest22059-21taskset09:06:151
1439199523,17cyclictest24364-21runrttasks07:48:571
1439199523,16cyclictest11038-21snmpd12:40:041
1439199514,16cyclictest16435-21chrt08:51:311
1439199514,14cyclictest25226-21grep07:50:191
1439199514,13cyclictest9102-21fschecks_time11:25:151
1439199513,16cyclictest888-21runrttasks09:36:231
1439199513,15cyclictest24140-21chrt09:13:211
1439199512,15cyclictest2970-21wc08:15:271
1439199507,12cyclictest24582-21ntp_states12:05:241
1439199504,14cyclictest22527-21chrt07:44:181
1439199503,16cyclictest18970-21which10:25:171
1439199495,18cyclictest30308-21cat10:55:201
1439199494,10cyclictest16917-21memory11:45:191
1439199493,16cyclictest32522-21cat08:10:121
1439199493,14cyclictest19829-21awk07:35:251
1439199487,15cyclictest16549-21latency_hist10:20:011
1439199484,15cyclictest28175-21df10:50:191
1439199484,15cyclictest13316-21smartctl10:10:211
1439199483,16cyclictest21431-21runrttasks11:57:131
1439199475,15cyclictest3711-21diskstats09:45:151
1439199474,19cyclictest6824-21/usr/sbin/munin11:20:171
1439199474,14cyclictest5175-21runrttasks08:21:451
1439199474,14cyclictest5175-21runrttasks08:21:451
1439199473,15cyclictest13286-21ntp_states11:35:241
1439199472,15cyclictest8486-21chrt09:55:571
1439199472,15cyclictest18248-21chrt08:55:521
14391994714,9cyclictest3286-21runrttasks10:37:031
1439199465,18cyclictest31277-21/usr/sbin/munin12:25:161
1439199464,16cyclictest7082-21grep12:45:191
1439199464,15cyclictest19660-21ntpq09:00:251
1439199464,15cyclictest11589-21df08:40:121
1439199464,14cyclictest28237-21/usr/sbin/munin09:25:181
1439199462,14cyclictest10979-21chrt08:38:361
1439199461,12cyclictest23168-21chrt12:00:361
1439199454,19cyclictest20357-21/usr/sbin/munin10:30:221
1439199453,19cyclictest24461-21/usr/sbin/munin09:15:171
1439199453,15cyclictest2272-21ntpq09:40:241
1439199453,15cyclictest11780-21awk10:05:241
1439199450,16cyclictest14499-21chrt08:45:541
306242440,2sleep030623-21grep08:05:100
1439199442,14cyclictest6672-21smartctl08:25:271
1439199442,13cyclictest32486-21ntpq11:00:271
1439199437,13cyclictest4630-21runrttasks11:13:371
1439199433,14cyclictest27012-21smartctl10:45:261
1439199431,13cyclictest11038-21snmpd11:19:461
1439199428,10cyclictest7529-21/usr/sbin/munin08:30:301
1439199423,7cyclictest10252-21grep10:00:301
1439199423,15cyclictest0-21swapper/109:50:271
1439199421,29cyclictest0-21swapper/111:05:171
1439099423,24cyclictest27994-21hddtemp_smartct12:15:150
79002410,8sleep01439099cyclictest12:46:540
1439199412,13cyclictest30468-21/usr/sbin/munin08:05:141
14391994113,9cyclictest3286-21runrttasks08:00:251
1439199405,15cyclictest18588-21cron07:32:591
1439199405,14cyclictest3286-21runrttasks12:53:021
1439199395,14cyclictest14949-21grep11:40:181
1439199392,14cyclictest27502-21/usr/sbin/munin12:15:191
1439199384,12cyclictest10846-21cstates11:30:161
1439199381,14cyclictest27627-21users09:20:301
1439099372,11cyclictest81rcu_preempt11:14:370
1439099371,14cyclictest0-21swapper/009:11:340
1439099352,20cyclictest24160-21chrt07:46:490
1439099351,22cyclictest7765-21/usr/sbin/munin11:20:240
1439099351,11cyclictest81rcu_preempt09:43:100
1439099349,13cyclictest417-21grep11:00:310
1439099345,4cyclictest81rcu_preempt10:07:310
1439099343,4cyclictest81rcu_preempt07:59:250
1439099341,13cyclictest6290-21cron12:44:590
276002331,28sleep011564-21packagekitd10:48:540
1439099339,12cyclictest13467-21df_inode08:45:130
1439099338,12cyclictest1620-21processes12:30:280
1439099333,3cyclictest81rcu_preempt09:36:290
1439099330,11cyclictest81rcu_preempt08:12:230
1439099324,4cyclictest81rcu_preempt12:25:180
1439099324,21cyclictest26041-21file07:51:080
1439099322,15cyclictest3286-21runrttasks07:33:440
1439099322,11cyclictest0-21swapper/007:45:000
69572311,3sleep011565-21gdbus08:25:480
63382310,10sleep01439099cyclictest09:50:250
1439099315,13cyclictest0-21swapper/011:55:200
1439099312,24cyclictest3275-21iostat_ios12:35:190
1439099311,4cyclictest81rcu_preempt09:31:530
1439099311,4cyclictest81rcu_preempt08:54:200
1439099311,4cyclictest81rcu_preempt08:22:140
1439099311,4cyclictest81rcu_preempt08:22:140
14390993112,5cyclictest2225-21dbus-daemon09:24:280
1439099310,4cyclictest81rcu_preempt08:57:020
184192300,2sleep018421-21sed10:25:000
1439099309,6cyclictest12954-21smartctl11:35:170
1439099302,14cyclictest15303-21irqstats10:15:210
1439099301,4cyclictest81rcu_preempt12:20:060
1439099301,4cyclictest81rcu_preempt11:42:240
1439099301,4cyclictest81rcu_preempt11:06:260
1439099301,4cyclictest81rcu_preempt08:42:010
14390993012,4cyclictest3792-21fschecks_count09:45:160
14390993011,7cyclictest24041-21df_inode12:05:120
14390993011,6cyclictest3131-21users08:15:280
14390993011,6cyclictest21175-21perl09:05:170
14390993011,5cyclictest5258-21fschecks_count11:15:120
1439099301,12cyclictest10819-21cstates11:30:170
14390993011,14cyclictest18710-21iostat_ios11:50:200
1439099300,11cyclictest81rcu_preempt12:12:410
1439099299,5cyclictest19305-21ntp_states10:25:240
1439099295,17cyclictest22178-21diskstats12:00:150
1439099293,4cyclictest81rcu_preempt10:53:260
1439099292,14cyclictest8132-21irqstats08:30:210
1439099292,13cyclictest25061-21irqstats09:15:200
14390992910,6cyclictest28892-21diskstats08:00:150
141282291,5sleep00-21swapper/010:10:520
204232281,5sleep00-21swapper/007:37:080
1439099281,4cyclictest81rcu_preempt09:28:340
1439099281,4cyclictest81rcu_preempt08:35:360
1439099281,23cyclictest299042/usr/sbin/munin10:55:140
1439099281,14cyclictest9681-21/usr/sbin/munin11:25:250
1439099281,14cyclictest8227-21ls09:55:280
1439099281,14cyclictest10274-21/usr/sbin/munin10:00:300
218032271,5sleep00-21swapper/010:32:170
1439099271,14cyclictest9301-21/usr/sbin/munin12:50:220
1439099271,14cyclictest17404-21/usr/sbin/munin11:45:300
1439099271,10cyclictest0-21swapper/010:35:150
1439099269,5cyclictest25142-21/usr/sbin/munin10:40:270
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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