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2026-08-30 - 23:53

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 376 highest latencies:
System rack9slot4s (updated Sun Aug 30, 2026 12:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
94279912201210,7cyclictest0-21swapper/107:25:121
94279911851140,25cyclictest7172-21ntp_states08:40:261
94269910871076,7cyclictest0-21swapper/007:25:100
91292622531,76sleep00-21swapper/007:22:260
92982461417,29sleep10-21swapper/107:24:121
942699245221,21cyclictest0-21swapper/008:40:250
229422960,4sleep122944-21aten_r4power_en10:50:121
152252930,4sleep015227-21unixbench_multi07:35:290
54902600,2sleep15492-21switchtime08:35:281
942799575,16cyclictest11860-21munin-node07:30:041
942799545,15cyclictest31049-21latency_hist08:20:011
942799525,13cyclictest2401-21NetworkManager12:07:121
942799524,17cyclictest15597-21grep10:30:131
942799524,15cyclictest22570-21ntp_states07:55:261
942799523,16cyclictest15257-21taskset09:01:381
942799516,19cyclictest23379-21awk12:15:251
942799514,15cyclictest3991-21grep12:50:181
942799514,14cyclictest19491-21cp07:49:001
942799513,15cyclictest9188-21chrt10:11:061
942799512,18cyclictest11464-21runrttasks08:51:261
942799512,16cyclictest4336-21irqstats11:25:211
942799506,14cyclictest3286-21runrttasks12:35:151
942799505,14cyclictest25645-21hddtemp_smartct09:30:171
942799504,17cyclictest22380-21runrttasks10:46:141
942799504,15cyclictest5391-21chrt10:00:391
942799504,15cyclictest32369-21chrt09:48:341
942799504,15cyclictest2486-21/usr/sbin/munin08:30:271
942799504,14cyclictest10567-21sh10:15:241
942799504,13cyclictest2401-21NetworkManager11:48:211
942799503,16cyclictest9703-21runrttasks08:47:391
942799503,16cyclictest29694-21runrttasks12:32:571
942799503,16cyclictest18390-21chrt12:02:351
942799503,15cyclictest8995-21runrttasks11:37:571
942799495,15cyclictest6814-21awk10:05:251
942799494,15cyclictest708-21smartctl09:50:171
942799494,15cyclictest15964-21find11:55:271
942799494,14cyclictest17098-21sh10:39:551
942799493,16cyclictest14071-21cat10:25:191
942799493,15cyclictest31893-21runrttasks11:12:291
942799493,15cyclictest23922-21chrt08:00:131
942799492,16cyclictest26360-21runrttasks10:58:381
942799492,16cyclictest21105-21runrttasks09:18:531
942799485,15cyclictest3286-21runrttasks11:20:131
942799483,16cyclictest10696-21chrt11:40:521
942799483,15cyclictest747-21cat08:25:131
942799483,15cyclictest32686-21chrt08:23:041
942799483,13cyclictest27759-21needreboot09:35:221
942799481,14cyclictest32247-21sh12:40:131
942799473,16cyclictest6436-21ntpq11:30:251
942799473,15cyclictest29043-21which11:05:161
9427994712,9cyclictest13364-21runrttasks08:56:401
942799471,14cyclictest2105-21/usr/sbin/munin09:55:161
942799465,11cyclictest1873-21tune2fs12:45:161
942799464,15cyclictest25685-21cat08:05:121
942799463,15cyclictest18467-21awk09:10:261
942799461,15cyclictest13071-21chrt10:22:081
942799443,15cyclictest16564-21ntpq09:05:241
942799442,15cyclictest16762-21ntpq07:40:261
942799433,14cyclictest26314-21/usr/sbin/munin12:25:221
942799426,17cyclictest14028-21/usr/sbin/munin07:35:221
942799414,17cyclictest3286-21runrttasks11:18:581
942799406,12cyclictest23877-21irqstats09:25:201
942799401,13cyclictest21405-21/usr/sbin/munin09:20:151
942799394,13cyclictest14159-21smartctl-wrappe11:50:281
942799392,14cyclictest19859-21/usr/sbin/munin07:50:261
942799391,15cyclictest25450-21sensors12:20:271
9427993910,25cyclictest3286-21runrttasks11:00:221
942799385,13cyclictest3286-21runrttasks10:42:161
942799381,8cyclictest0-21swapper/109:40:061
942799381,8cyclictest0-21swapper/109:40:051
9427993810,9cyclictest27387-21/usr/sbin/munin08:10:261
942799376,11cyclictest3286-21runrttasks12:10:181
49152370,4sleep041ktimersoftd/010:00:240
942699361,11cyclictest16115-21fschecks_count09:05:160
284032361,30sleep028485-21/usr/sbin/munin08:10:280
942699353,5cyclictest81rcu_preempt12:05:190
9426993519,5cyclictest7326-21sh11:35:000
942699351,20cyclictest12270-21diskstats08:55:140
942699351,13cyclictest0-21swapper/010:11:550
232192350,9sleep0942699cyclictest12:15:220
34812340,9sleep0942699cyclictest09:55:310
942699332,19cyclictest16515-21iostat07:40:190
9426993316,5cyclictest22626-21sed09:20:310
942699331,4cyclictest81rcu_preempt08:23:240
942699331,20cyclictest2608-21ntp_states11:20:240
942699331,14cyclictest0-21swapper/011:28:440
942699331,11cyclictest81rcu_preempt12:23:360
942699327,4cyclictest81rcu_preempt07:50:350
942699321,10cyclictest81rcu_preempt10:30:150
301262321,9sleep00-21swapper/011:08:370
283382321,9sleep00-21swapper/009:35:530
942699317,12cyclictest27850-21unixbench_multi11:00:290
942699317,11cyclictest12409-21timerwakeupswit11:45:280
942699313,4cyclictest81rcu_preempt10:55:120
942699312,6cyclictest5124-21munin-run12:55:000
942699312,13cyclictest32550-21iostat12:40:180
942699311,4cyclictest81rcu_preempt10:37:530
942699311,4cyclictest81rcu_preempt09:16:210
9426993112,6cyclictest18643-21python09:10:280
942699311,18cyclictest3899-21taskset08:31:020
942699311,18cyclictest22597-21chrt10:48:300
9426993111,6cyclictest17933-21python12:00:320
942699305,13cyclictest0-21swapper/011:58:000
942699302,24cyclictest2008-21iostat12:45:200
942699301,4cyclictest81rcu_preempt10:22:140
942699301,4cyclictest81rcu_preempt09:41:350
942699301,4cyclictest81rcu_preempt09:41:340
942699301,4cyclictest81rcu_preempt07:56:570
942699301,25cyclictest14361-21sed11:50:300
9426993011,6cyclictest9041-21ntp_states08:45:230
9426993011,5cyclictest6554-21/usr/sbin/munin10:05:180
9426993011,5cyclictest0-21swapper/007:46:030
942699301,11cyclictest81rcu_preempt11:41:370
942699300,4cyclictest81rcu_preempt08:36:570
942699293,4cyclictest81rcu_preempt12:31:080
9426992921,5cyclictest23914-21latency09:25:210
942699292,14cyclictest11038-21snmpd10:42:450
942699292,14cyclictest10377-21df08:50:130
942699291,4cyclictest81rcu_preempt10:15:110
9426992912,5cyclictest27146-21/usr/sbin/munin12:25:260
9426992911,5cyclictest2225-21dbus-daemon08:16:520
241892291,5sleep00-21swapper/010:50:330
942699289,4cyclictest8518-21switchtime11:35:260
942699282,4cyclictest81rcu_preempt11:10:590
942699281,19cyclictest0-21swapper/008:07:550
9426992811,4cyclictest2225-21dbus-daemon10:26:580
942699281,13cyclictest20847-21cpuspeed_turbos12:10:120
9426992810,6cyclictest31079-21df09:45:130
942699276,4cyclictest12606-21/usr/sbin/munin07:30:170
942699274,11cyclictest0-21swapper/008:25:190
942699273,12cyclictest0-21swapper/009:00:150
942699271,14cyclictest31077-21/usr/sbin/munin12:35:280
942699271,13cyclictest491-21ls11:15:220
9426992710,5cyclictest561-21/usr/sbin/munin09:50:150
264702271,4sleep00-21swapper/009:30:570
249572271,5sleep00-21swapper/008:00:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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