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2026-05-23 - 13:06

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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 100 highest latencies:
System rack5slot3s.osadl.org (updated Sat May 23, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27632247164,21sleep20-21swapper/219:05:272
31282237161,22sleep00-21swapper/019:09:470
29712204168,23sleep30-21swapper/319:07:453
30932201165,24sleep10-21swapper/119:09:201
1659021740,3sleep2323699cyclictest00:25:202
2621921450,3sleep2323699cyclictest23:35:122
3236997571,3cyclictest0-21swapper/221:21:202
264162530,1sleep10-21swapper/120:00:121
264162530,1sleep10-21swapper/120:00:121
172792490,2sleep1323099cyclictest00:27:241
3236993936,2cyclictest0-21swapper/221:06:242
323699351,16cyclictest1-21systemd20:24:312
323699329,4cyclictest23689-21awk19:55:012
323699321,15cyclictest29369-21ntp_states20:05:212
323699311,10cyclictest18070-21diskstats00:30:132
322299301,14cyclictest0-21swapper/023:09:560
324399298,9cyclictest21698-21ntp_kernel_err22:10:193
323699292,6cyclictest21035-40dnf23:22:252
323699291,14cyclictest0-21swapper/222:30:212
323699291,13cyclictest0-21swapper/219:10:292
323699291,12cyclictest6666-21df_inode19:15:132
322299296,11cyclictest0-21swapper/019:55:010
323699281,9cyclictest0-21swapper/222:00:212
323699281,4cyclictest9642-21idleruntime00:10:162
323699281,13cyclictest0-21swapper/223:34:412
323699281,13cyclictest0-21swapper/223:34:412
323699281,13cyclictest0-21swapper/219:55:372
323699281,12cyclictest2307-21munin-run20:20:012
54662270,4sleep1323099cyclictest19:15:011
324399271,11cyclictest0-21swapper/320:41:013
323699271,13cyclictest0-21swapper/223:07:092
323699271,12cyclictest0-21swapper/220:43:252
323699271,11cyclictest28420-21diskstats23:40:132
323699270,14cyclictest0-21swapper/223:04:332
323099271,13cyclictest0-21swapper/123:39:271
3243992615,3cyclictest0-21swapper/320:53:073
324399261,17cyclictest0-21swapper/320:10:113
324399261,12cyclictest0-21swapper/300:20:173
324399261,10cyclictest15996-21diskstats20:45:133
3243992610,5cyclictest87350irq/126-enp1s0-20:21:113
323699269,2cyclictest0-21swapper/220:25:232
323699261,11cyclictest0-21swapper/222:20:052
323699261,11cyclictest0-21swapper/222:20:052
323699261,11cyclictest0-21swapper/221:48:092
323699261,11cyclictest0-21swapper/220:30:572
323699260,11cyclictest0-21swapper/200:36:572
323099261,17cyclictest0-21swapper/121:20:401
323099260,3cyclictest87350irq/126-enp1s0-00:18:071
322299261,13cyclictest17511-21basename00:30:010
324399258,3cyclictest0-21swapper/323:38:353
324399251,10cyclictest0-21swapper/322:43:053
324399251,10cyclictest0-21swapper/319:38:053
324399251,10cyclictest0-21swapper/319:25:173
323699251,12cyclictest0-21swapper/220:45:052
323699251,11cyclictest0-21swapper/222:13:492
323699250,14cyclictest0-21swapper/222:40:172
323699250,12cyclictest0-21swapper/220:00:172
323699250,12cyclictest0-21swapper/220:00:172
324399248,4cyclictest0-21swapper/300:25:013
324399248,3cyclictest0-21swapper/322:45:533
324399248,3cyclictest0-21swapper/322:29:573
324399248,3cyclictest0-21swapper/321:30:133
324399247,8cyclictest0-21swapper/320:19:033
324399247,2cyclictest0-21swapper/322:30:153
324399245,3cyclictest22537-21ntpq23:25:193
3243992414,2cyclictest0-21swapper/323:30:113
3243992414,2cyclictest0-21swapper/323:30:113
324399241,13cyclictest0-21swapper/322:37:453
324399241,10cyclictest0-21swapper/323:13:493
324399241,10cyclictest0-21swapper/319:41:533
324399240,9cyclictest0-21swapper/300:13:013
323699244,2cyclictest18226-21pmu-power23:15:212
323099245,2cyclictest87650irq/129-enp1s0-19:45:081
323099242,8cyclictest17464-21kworker/u8:100:32:171
323099242,15cyclictest0-21swapper/121:31:131
323099241,14cyclictest0-21swapper/122:43:311
323099240,19cyclictest0-21swapper/121:11:391
323099240,19cyclictest0-21swapper/121:11:391
324399239,3cyclictest0-21swapper/321:10:173
324399239,3cyclictest0-21swapper/321:10:173
324399238,4cyclictest6775-21systemd20:25:073
324399238,3cyclictest0-21swapper/321:00:213
324399236,8cyclictest31184-21missed_timers23:45:183
324399231,11cyclictest0-21swapper/322:00:173
324399231,11cyclictest0-21swapper/320:36:333
3243992310,3cyclictest10021-21df_inode21:45:153
324399230,4cyclictest0-21swapper/300:35:153
323699238,3cyclictest0-21swapper/219:26:332
323699230,11cyclictest0-21swapper/200:21:012
323099239,4cyclictest2849-21munin-run21:30:011
323099239,4cyclictest0-21swapper/123:02:501
323099237,9cyclictest0-21swapper/121:59:461
323099231,7cyclictest13364-21hddtemp_smartct23:05:161
323099231,19cyclictest0-21swapper/120:20:091
323099231,15cyclictest0-21swapper/123:31:481
323099231,15cyclictest0-21swapper/123:31:481
322299231,12cyclictest1-21systemd20:25:080
311082230,5sleep339-21rcuc/321:20:123
324399229,3cyclictest17277-21expr23:15:113
324399229,1cyclictest0-21swapper/323:00:153
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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