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2026-08-08 - 03:14

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 Sat Aug 08, 2026 00:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
72349912211,5cyclictest7535-21cpuspeed_turbos19:25:120
72359912101194,13cyclictest0-21swapper/119:25:111
71502657611,31sleep10-21swapper/119:24:431
68982563518,30sleep00-21swapper/019:22:020
723499240210,18cyclictest0-21swapper/020:40:190
310782760,4sleep041ktimersoftd/021:50:250
180932710,7sleep1201rcuc/100:10:001
7234996120,7cyclictest7584-21diskstats22:15:150
723499461,17cyclictest24660-21ntp_kernel_err00:25:210
184282390,8sleep0723499cyclictest19:50:260
723499371,13cyclictest0-21swapper/022:45:220
723599361,9cyclictest6942-21/usr/sbin/munin23:40:231
64492351,30sleep12695-21snmpd23:36:511
10062351,4sleep12695-21snmpd21:56:281
7234993412,11cyclictest1856-21/usr/sbin/munin00:50:270
723499341,16cyclictest0-21swapper/023:12:170
262592331,28sleep111565-21gdbus20:10:581
107292331,4sleep010823-21/usr/sbin/munin19:30:250
101292331,4sleep110212-21memory20:55:221
7234993211,7cyclictest3286-21runrttasks23:46:280
17232321,27sleep11773-21iostat23:25:171
723599317,20cyclictest0-21swapper/123:15:271
723599311,5cyclictest81rcu_preempt21:53:451
7234993121,6cyclictest327672chrt00:46:130
723499312,16cyclictest0-21swapper/020:52:500
723499312,16cyclictest0-21swapper/020:30:260
7234993112,7cyclictest21286-21ntp_states22:50:230
723499311,13cyclictest11045-21fschecks_count23:50:140
45612319,8sleep122-21ksoftirqd/123:31:431
132022311,26sleep12225-21dbus-daemon19:37:061
723599305,4cyclictest81rcu_preempt00:45:481
723599305,18cyclictest29810-21diskstats00:40:151
723599301,7cyclictest27987-21/usr/sbin/munin23:10:281
7235993015,8cyclictest24162-21diskstats00:25:141
723599301,25cyclictest23652-21iostat20:05:191
723499309,5cyclictest11565-21gdbus00:22:300
723499301,9cyclictest0-21swapper/019:45:270
723499301,4cyclictest81rcu_preempt23:20:020
723499301,4cyclictest81rcu_preempt20:19:370
7234993012,5cyclictest19883-21iostat19:55:190
7234993011,7cyclictest31418-21/usr/sbin/munin20:25:250
723499301,13cyclictest30080-21munin-run21:50:000
723499301,13cyclictest30080-21munin-run21:50:000
7234993010,6cyclictest26663-21latency_hist20:15:020
238242301,5sleep10-21swapper/122:57:411
158312301,25sleep115970-21sed22:35:271
8012291,5sleep10-21swapper/123:22:531
723599297,10cyclictest2401-21NetworkManager21:45:421
723599297,10cyclictest2401-21NetworkManager21:45:421
723599296,4cyclictest81rcu_preempt00:17:441
723599294,9cyclictest21659-21ntp_states21:25:251
723599292,14cyclictest23719-21munin-run00:25:011
723599291,4cyclictest81rcu_preempt19:33:281
7235992913,13cyclictest22-21ksoftirqd/121:02:411
723499292,4cyclictest81rcu_preempt22:03:350
723499292,4cyclictest81rcu_preempt20:45:080
723499291,4cyclictest81rcu_preempt22:32:300
723499291,4cyclictest81rcu_preempt22:08:240
723499291,24cyclictest9627-21fschecks_time22:20:170
7234992911,6cyclictest12633-21/usr/sbin/munin19:35:250
723499291,14cyclictest2942-21awk20:35:270
723499291,14cyclictest16941-21/usr/sbin/munin00:05:180
723499291,14cyclictest16764-21wget22:40:100
7234992910,6cyclictest1868-21memory23:25:190
7234992910,6cyclictest12326-21users22:25:280
723499290,4cyclictest81rcu_preempt21:59:430
49922291,5sleep10-21swapper/122:07:251
279342291,5sleep10-21swapper/121:42:221
243992291,5sleep00-21swapper/020:06:060
204762291,5sleep10-21swapper/121:23:031
190872291,5sleep10-21swapper/119:54:381
139162291,5sleep10-21swapper/123:56:081
139162291,5sleep10-21swapper/123:56:081
91132281,5sleep10-21swapper/120:52:251
723599285,3cyclictest81rcu_preempt22:29:471
723599285,3cyclictest81rcu_preempt21:35:401
723599283,4cyclictest81rcu_preempt22:01:361
723599281,8cyclictest5767-21/usr/sbin/munin20:45:291
723599281,4cyclictest81rcu_preempt22:18:241
723599281,3cyclictest81rcu_preempt22:42:141
723599281,15cyclictest27245-21seq00:32:531
723499284,12cyclictest14911-21unixbench_singl19:40:260
723499282,14cyclictest13591-21python23:55:260
723499282,14cyclictest13591-21python23:55:260
723499282,12cyclictest0-21swapper/022:13:500
723499281,4cyclictest81rcu_preempt20:22:450
723499281,18cyclictest0-21swapper/023:16:440
7234992811,6cyclictest3-21ksoftirqd/021:25:110
723499281,15cyclictest22634-21/usr/sbin/munin22:55:140
723499281,13cyclictest25797-21aten_r4power_en00:30:130
7234992810,5cyclictest19844-21processes21:20:260
62372281,4sleep181rcu_preempt22:10:261
46142281,4sleep00-21swapper/023:32:150
320832281,5sleep10-21swapper/120:27:481
282142281,5sleep10-21swapper/120:16:481
276162281,5sleep10-21swapper/100:35:111
257092281,5sleep00-21swapper/023:02:320
24182281,5sleep10-21swapper/100:53:241
220042281,5sleep10-21swapper/122:53:141
206262281,5sleep10-21swapper/119:56:051
195302281,5sleep10-21swapper/100:10:501
187362281,5sleep00-21swapper/021:19:410
166472281,5sleep10-21swapper/121:12:291
164192281,5sleep00-21swapper/022:38:540
157712281,5sleep10-21swapper/100:00:441
145302281,5sleep10-21swapper/122:33:461
723599274,4cyclictest81rcu_preempt20:38:301
723599274,17cyclictest4187-21diskstats20:40:151
723599273,8cyclictest21481-21diskstats20:00:141
7235992719,5cyclictest1171-21unixbench_multi20:30:281
723599271,4cyclictest81rcu_preempt21:30:421
723499271,18cyclictest0-21swapper/000:17:180
723499271,14cyclictest16710-21chrt21:13:040
723499271,13cyclictest5116-21basename23:35:110
723499271,13cyclictest24581-21/usr/sbin/munin21:35:180
723499271,13cyclictest14829-21fschecks_count00:00:170
723499271,13cyclictest10128-21irqstats20:55:210
723499271,12cyclictest27762-21runrttasks23:09:230
300032271,5sleep10-21swapper/120:20:411
277882271,5sleep10-21swapper/123:09:411
184032271,4sleep10-21swapper/121:16:141
172042271,5sleep10-21swapper/119:49:331
123942271,5sleep10-21swapper/123:54:511
104962271,5sleep10-21swapper/122:20:491
723599262,4cyclictest81rcu_preempt19:41:121
723599262,18cyclictest9518-21memory23:45:261
723599261,21cyclictest14707-21taskset21:06:511
723499269,5cyclictest23912-21unixbench_singl21:30:290
723499267,7cyclictest12807-21chrt21:01:360
723499263,17cyclictest30340-21ntp_states00:40:240
723499262,12cyclictest11564-21packagekitd21:05:120
723499262,11cyclictest3286-21runrttasks20:01:350
723499261,17cyclictest0-21swapper/023:41:390
723499261,12cyclictest11565-21gdbus00:14:260
257072261,5sleep10-21swapper/123:02:311
198852261,4sleep10-21swapper/122:45:441
723499245,5cyclictest27807-21tr00:35:130
7234992413,8cyclictest3-21ksoftirqd/021:40:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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