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2026-04-27 - 12:37

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 Mon Apr 27, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1917728975,9sleep00-21swapper/019:05:410
1938828168,9sleep20-21swapper/219:08:242
1921727764,9sleep30-21swapper/319:06:133
1937227659,13sleep10-21swapper/119:08:111
205312480,1sleep30-21swapper/321:14:513
1958499330,2cyclictest25364-21kernelversion00:30:210
1958499314,26cyclictest12390-21diskmemload21:28:290
1958499303,26cyclictest12390-21diskmemload22:14:110
1958499293,25cyclictest12390-21diskmemload22:58:270
1958499292,25cyclictest10071-21apt-key21:05:010
1958499292,19cyclictest0-21swapper/023:16:430
1958499290,3cyclictest0-21swapper/023:43:380
1958499290,2cyclictest0-21swapper/020:25:140
19589992822,3cyclictest25-21ksoftirqd/100:06:491
1958499284,23cyclictest22437-21cron00:10:000
1958499281,26cyclictest2712-21rm22:40:190
1958499281,26cyclictest12390-21diskmemload21:44:340
1958499280,3cyclictest22967-21tail21:35:160
1958499273,23cyclictest31349-21apt-get00:15:140
1958499272,12cyclictest0-21swapper/023:23:390
1958499271,1cyclictest12390-21diskmemload22:19:180
1958499270,3cyclictest5717-21kworker/u8:022:05:080
1958499270,25cyclictest0-21swapper/022:22:360
1958499270,1cyclictest0-21swapper/023:34:080
1958499262,2cyclictest12390-21diskmemload23:13:040
1958499262,23cyclictest12390-21diskmemload22:25:540
1958499262,19cyclictest12935-21ssh21:10:120
1958499261,24cyclictest12390-21diskmemload21:55:040
1958499261,23cyclictest0-21swapper/023:25:250
1958499260,2cyclictest0-21swapper/022:45:130
1958499260,2cyclictest0-21swapper/022:31:550
1958499260,25cyclictest0-21swapper/021:15:320
1958499260,21cyclictest0-21swapper/023:02:390
1959499252,23cyclictest32-21ksoftirqd/200:23:532
1958999250,25cyclictest0-21swapper/123:50:221
1958499251,2cyclictest21157-21perf23:50:010
1958499251,1cyclictest12390-21diskmemload23:06:370
1958499250,2cyclictest12390-21diskmemload23:37:370
1958499250,24cyclictest0-21swapper/000:21:090
1958999240,24cyclictest0-21swapper/100:36:101
1958499242,3cyclictest879-21python22:00:250
1958499242,1cyclictest12390-21diskmemload21:46:330
1958499241,22cyclictest15971-21latency_hist20:10:000
1958499241,1cyclictest0-21swapper/021:32:220
1958499240,0cyclictest0-21swapper/023:54:090
19594992312,10cyclictest55550irq/126-enp2s0-22:30:222
1958499233,19cyclictest11007-21/usr/sbin/munin20:00:000
1958499232,2cyclictest12390-21diskmemload00:11:240
1958499232,1cyclictest0-21swapper/019:40:150
1958499230,22cyclictest0-21swapper/023:56:220
1958499230,1cyclictest0-21swapper/021:54:430
1958499230,16cyclictest0-21swapper/021:22:540
19598992219,1cyclictest28987-21ssh23:35:123
1959499225,5cyclictest3765-21ssh22:21:282
1959499224,6cyclictest20812-21apache_volume20:20:142
1959499220,3cyclictest15531-21ssh22:29:092
1958999220,17cyclictest0-21swapper/122:01:051
1958499223,18cyclictest12390-21diskmemload00:03:190
1958499221,1cyclictest12390-21diskmemload22:37:120
1958499220,21cyclictest0-21swapper/019:35:140
1959499217,12cyclictest20267-21sh00:27:262
19594992118,2cyclictest22441-21cron00:10:012
1959499211,2cyclictest26982-21apache_processe19:25:122
1959499211,2cyclictest12390-21diskmemload00:02:252
19589992115,4cyclictest25-21ksoftirqd/121:39:521
1958999210,1cyclictest0-21swapper/122:30:231
1958499210,20cyclictest0-21swapper/020:40:160
1958499210,16cyclictest0-21swapper/019:30:210
1958499210,0cyclictest0-21swapper/000:25:220
1959499205,13cyclictest12390-21diskmemload22:01:052
19594992012,7cyclictest0-21swapper/222:35:132
1959499200,1cyclictest0-21swapper/221:17:212
1958999202,17cyclictest19099-21latency_hist23:10:011
1958499202,1cyclictest12390-21diskmemload00:37:560
1959899190,19cyclictest0-21swapper/322:14:103
1959499192,12cyclictest32-21ksoftirqd/221:12:172
19594991915,3cyclictest0-21swapper/223:27:332
1959499191,17cyclictest0-21swapper/221:21:532
1959499191,17cyclictest0-21swapper/200:13:292
19594991910,7cyclictest25384-21kernelversion00:30:212
1958999190,2cyclictest0-21swapper/121:40:011
1958999190,0cyclictest0-21swapper/121:53:531
1958499196,8cyclictest18366-21ssh22:50:040
1958499190,1cyclictest7401-21cron20:59:590
1959499188,5cyclictest0-21swapper/223:22:342
1959499188,4cyclictest19121-21sh23:10:002
1959499187,1cyclictest12390-21diskmemload00:38:042
19594991816,1cyclictest12390-21diskmemload23:50:472
19594991811,7cyclictest12390-21diskmemload22:59:102
1959499180,17cyclictest0-21swapper/222:40:042
19589991817,1cyclictest0-21swapper/121:34:221
1958499181,2cyclictest1214-21sed20:45:180
1958499180,3cyclictest25751-21ntp_kernel_pll_19:20:210
1958499180,1cyclictest0-21swapper/019:15:150
1959899170,1cyclictest141rcu_preempt21:24:483
19594991714,1cyclictest12390-21diskmemload23:15:142
19594991713,4cyclictest0-21swapper/223:45:302
19594991711,4cyclictest32-21ksoftirqd/221:28:522
19594991710,7cyclictest12390-21diskmemload23:34:592
1958999179,4cyclictest12390-21diskmemload23:57:411
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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