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2026-05-06 - 08:41

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 100 highest latencies:
System rack9slot4s (updated Wed May 06, 2026 00:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
203109912381216,19cyclictest0-21swapper/119:25:111
203099911661124,29cyclictest20730-21df19:25:130
203109910931083,6cyclictest1929-21ntp_states22:50:251
199952588489,83sleep00-21swapper/019:22:160
199872560518,27sleep10-21swapper/119:22:111
845221030,6sleep18453-21grep21:40:311
221132920,7sleep12031099cyclictest22:20:001
58142850,7sleep12031099cyclictest23:00:261
46452750,3sleep14646-21aten_r4power_cu00:25:121
20309996554,8cyclictest0-21swapper/022:50:250
109512460,5sleep0111rcuc/021:50:010
144792450,7sleep12031099cyclictest20:30:321
168582440,6sleep12031099cyclictest23:30:191
120042400,5sleep011998-21munin-run00:45:000
20309993822,5cyclictest3-21ksoftirqd/022:25:100
20309993822,5cyclictest3-21ksoftirqd/021:36:230
20309993821,6cyclictest3-21ksoftirqd/022:24:370
20309993821,6cyclictest3-21ksoftirqd/020:16:150
20309993816,11cyclictest3-21ksoftirqd/020:04:410
20309993721,5cyclictest3-21ksoftirqd/023:44:540
20309993621,5cyclictest3-21ksoftirqd/021:59:430
20309993519,6cyclictest3-21ksoftirqd/022:32:160
20309993518,6cyclictest3-21ksoftirqd/019:38:490
20309993513,11cyclictest3-21ksoftirqd/022:39:170
20309993512,7cyclictest13191-21memory23:20:200
156692351,30sleep015753-21/usr/sbin/munin22:00:270
25502340,30sleep12639-21awk20:00:231
2030999349,11cyclictest28649-21grep21:10:140
20309993419,5cyclictest3-21ksoftirqd/023:38:310
20309993418,6cyclictest3-21ksoftirqd/023:04:290
20309993418,5cyclictest3-21ksoftirqd/023:28:380
20309993417,6cyclictest3-21ksoftirqd/000:13:200
2030999341,12cyclictest0-21swapper/021:05:390
95952331,5sleep19637-21/usr/sbin/munin21:45:191
2031099331,5cyclictest0-21swapper/120:35:291
20309993317,5cyclictest3-21ksoftirqd/023:13:440
20309993311,5cyclictest40250irq/92-i91520:10:120
7992321,5sleep00-21swapper/022:48:430
60102320,9sleep02030999cyclictest00:26:400
39452321,5sleep14008-21users00:20:321
39452321,5sleep14008-21users00:20:311
314142321,9sleep00-21swapper/021:15:320
20310993214,5cyclictest21395-21wc20:50:201
20309993217,5cyclictest3-21ksoftirqd/022:17:080
20309993217,5cyclictest3-21ksoftirqd/020:45:280
20309993217,5cyclictest3-21ksoftirqd/000:22:280
20309993217,5cyclictest3-21ksoftirqd/000:22:270
130062321,5sleep00-21swapper/020:29:410
5962310,4sleep0111rcuc/019:55:230
36762310,5sleep1211ktimersoftd/122:55:191
2031099316,4cyclictest81rcu_preempt21:58:071
2031099316,4cyclictest81rcu_preempt19:45:231
2031099314,4cyclictest81rcu_preempt19:58:021
2031099311,16cyclictest32526-21hddtemp_smartct21:20:161
2031099311,16cyclictest32526-21hddtemp_smartct21:20:161
2030999317,12cyclictest29137-21hwlatdetect19:45:180
2030999314,4cyclictest81rcu_preempt00:18:170
2030999313,14cyclictest18982-21perl22:10:160
2030999312,13cyclictest14655-21iostat_ios00:50:180
20309993117,4cyclictest3-21ksoftirqd/021:32:270
20309993117,10cyclictest12335-21cron23:20:010
20309993116,5cyclictest3-21ksoftirqd/000:37:160
20309993115,6cyclictest3-21ksoftirqd/020:54:520
20309993113,6cyclictest15587-21/usr/sbin/munin20:35:180
64932301,5sleep10-21swapper/100:30:111
46282301,5sleep00-21swapper/022:58:160
312112301,5sleep10-21swapper/122:41:551
232842302,23sleep10-21swapper/120:55:221
225702301,25sleep022640-21memory19:30:040
20310993022,4cyclictest31905-21iostat_ios00:10:201
2031099301,8cyclictest7194-21fschecks_count23:05:181
2031099301,4cyclictest81rcu_preempt21:37:061
2031099301,16cyclictest9735-21df20:20:151
20310993011,5cyclictest3286-21runrttasks19:33:291
2030999302,24cyclictest2690-21sed21:25:280
20309993016,4cyclictest3-21ksoftirqd/020:55:040
20309993015,5cyclictest3-21ksoftirqd/022:44:460
20309993015,5cyclictest3-21ksoftirqd/021:43:310
20309993015,5cyclictest3-21ksoftirqd/019:54:100
20309993013,5cyclictest10277-21ntp_states20:20:250
32712291,24sleep13353-21latency_hist21:30:001
320312291,5sleep00-21swapper/021:20:080
320312291,5sleep00-21swapper/021:20:080
2031099296,4cyclictest81rcu_preempt00:07:471
2031099295,4cyclictest81rcu_preempt22:05:381
2031099294,8cyclictest11925-21iostat_ios20:25:201
2031099293,23cyclictest0-21swapper/121:52:111
20310992919,6cyclictest28671-21cat00:00:301
2030999296,6cyclictest3-21ksoftirqd/021:50:180
2030999293,3cyclictest81rcu_preempt20:34:460
20309992911,5cyclictest24269-21perl23:50:150
20309992910,5cyclictest28051-21hddtemp_smartct00:00:180
185642291,5sleep00-21swapper/020:43:470
156662291,5sleep10-21swapper/100:53:571
8902281,5sleep10-21swapper/122:49:401
292542281,5sleep10-21swapper/122:36:181
275902281,5sleep10-21swapper/122:33:301
270272281,5sleep00-21swapper/023:56:280
254932281,5sleep10-21swapper/122:26:101
2031099285,4cyclictest81rcu_preempt23:26:371
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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