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2026-06-03 - 04:52

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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 rack7slot7s.osadl.org (updated Wed Jun 03, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18308210190,6sleep00-21swapper/019:09:580
1802729468,8sleep20-21swapper/219:06:232
1800829364,9sleep30-21swapper/319:06:083
1817728366,13sleep10-21swapper/119:08:181
18403992727,0cyclictest0-21swapper/321:37:303
1840399270,26cyclictest0-21swapper/323:47:423
1839899262,1cyclictest6140-21diskmemload00:23:591
1839899261,19cyclictest6140-21diskmemload21:13:391
1839499250,24cyclictest0-21swapper/021:59:050
265062230,0sleep00-21swapper/023:55:190
18400992221,1cyclictest32-21ksoftirqd/222:59:052
1840099220,20cyclictest0-21swapper/223:23:142
18400992121,0cyclictest0-21swapper/220:49:282
1840099210,21cyclictest0-21swapper/223:16:242
1840099210,1cyclictest0-21swapper/223:38:032
1839899212,15cyclictest11793-21ntp_states22:10:211
1839899210,1cyclictest0-21swapper/122:06:111
1839899210,18cyclictest3240-21/usr/sbin/munin22:25:151
1839899210,0cyclictest0-21swapper/122:45:171
51842200,0sleep00-21swapper/000:01:530
1840399200,1cyclictest0-21swapper/322:40:373
1840399200,19cyclictest0-21swapper/323:08:153
1840099200,20cyclictest0-21swapper/200:00:342
1840099190,17cyclictest0-21swapper/221:18:152
1839899196,1cyclictest27984-21ssh21:41:211
1839899195,9cyclictest8365-21/usr/sbin/munin23:25:191
1839899193,15cyclictest6140-21diskmemload21:50:141
1839499199,4cyclictest25030-21cpuspeed_turbos21:40:140
1839499195,8cyclictest24299-21perf21:40:010
1839499190,18cyclictest0-21swapper/021:24:520
1840399183,14cyclictest0-21swapper/322:30:133
18398991817,0cyclictest0-21swapper/121:37:271
1839899180,1cyclictest0-21swapper/100:00:271
18394991810,6cyclictest14301-21apache200:35:190
18394991810,6cyclictest14301-21apache200:35:190
1839499180,17cyclictest0-21swapper/023:13:050
18403991716,1cyclictest0-21swapper/323:24:553
1840099170,17cyclictest0-21swapper/200:10:192
1839899175,10cyclictest4265-21turbostat22:45:001
18398991716,1cyclictest0-21swapper/100:11:171
1839499170,17cyclictest0-21swapper/022:49:390
1839499170,17cyclictest0-21swapper/022:31:420
18403991616,0cyclictest0-21swapper/322:36:183
1840099160,3cyclictest0-21swapper/222:45:532
1839899160,2cyclictest0-21swapper/123:46:481
1839899160,16cyclictest0-21swapper/123:31:151
258602150,0sleep00-21swapper/022:19:180
18403991514,1cyclictest0-21swapper/322:50:223
18403991514,1cyclictest0-21swapper/322:50:223
18403991512,2cyclictest15922-21mailstats23:10:223
1840399150,3cyclictest0-21swapper/300:37:313
1840399150,3cyclictest0-21swapper/300:37:303
1840399150,1cyclictest0-21swapper/322:07:583
1840399150,1cyclictest0-21swapper/300:28:553
1840099151,1cyclictest141rcu_preempt22:02:012
1840099150,15cyclictest0-21swapper/221:46:352
1840099150,15cyclictest0-21swapper/221:43:582
1839899153,2cyclictest225-21systemd-journal22:35:001
1839899150,2cyclictest0-21swapper/123:00:361
18403991414,0cyclictest0-21swapper/321:50:323
18403991413,1cyclictest0-21swapper/323:04:063
1840399141,13cyclictest0-21swapper/322:24:293
18403991411,2cyclictest32633-21cron21:45:003
18403991410,3cyclictest9504-21cron20:10:003
18403991410,3cyclictest8529-21tr21:30:293
1840099148,5cyclictest55850irq/129-enp2s0-23:14:472
1840099145,7cyclictest27718-21rm00:35:002
1840099145,6cyclictest3417-21ssh22:25:132
18400991414,0cyclictest0-21swapper/222:15:052
18400991410,3cyclictest4215-21wc00:20:212
18400991410,2cyclictest10152-21grep00:05:192
1839899146,7cyclictest38150irq/131-snd_hda23:06:081
1839899142,11cyclictest31562-21taskset00:17:251
18398991412,1cyclictest0-21swapper/100:31:061
18398991411,2cyclictest24386-21munin-run19:30:011
18398991410,3cyclictest16643-21cron20:25:001
1839899140,12cyclictest21749-21grep19:20:101
18394991410,2cyclictest4616-21open_files22:25:200
1839499140,8cyclictest1518-21basename22:05:000
1839499140,4cyclictest0-21swapper/000:10:030
1839499140,14cyclictest0-21swapper/022:22:140
1840399139,3cyclictest3318-21grep19:55:183
1840399139,3cyclictest27744-21cut00:15:193
1840399139,3cyclictest23901-21cat23:15:183
1840399139,3cyclictest17808-21head23:50:183
18403991313,0cyclictest0-21swapper/322:11:043
18403991310,2cyclictest31511-21grep21:25:013
18403991310,2cyclictest28531-21sed20:45:283
18403991310,2cyclictest27010-21wc22:20:003
18403991310,2cyclictest15236-21grep20:20:163
1840099133,9cyclictest18519-21/usr/sbin/munin21:55:172
1840099131,2cyclictest3522-21ssh22:44:262
18400991310,2cyclictest2030-21head23:40:262
18400991310,2cyclictest18557-21wc20:25:252
18400991310,2cyclictest15203-21ssh22:50:272
18400991310,2cyclictest15203-21ssh22:50:272
18400991310,2cyclictest13179-21expr00:25:262
1840099130,13cyclictest0-21swapper/222:10:432
1839899138,4cyclictest26277-21taskset22:38:281
18398991310,2cyclictest30580-21grep19:45:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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