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2026-08-08 - 08:08

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack3slot6s.osadl.org (updated Sat Aug 08, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1266721370,1sleep312666-21ssh22:43:093
32571211597,13sleep30-21swapper/319:08:343
32471211188,18sleep00-21swapper/019:07:150
32579210993,11sleep10-21swapper/119:08:411
32610210594,6sleep20-21swapper/219:09:062
28012750,0sleep30-21swapper/300:10:473
3271699370,35cyclictest0-21swapper/221:15:112
32711993315,16cyclictest0-21swapper/023:05:110
157882330,1sleep20-21swapper/221:40:512
32717992219,2cyclictest16758-21kworker/u8:021:24:013
74832210,0sleep10-21swapper/122:05:151
32717992118,2cyclictest493-21kworker/u8:221:29:043
32717992118,2cyclictest11775-21kworker/u8:119:41:053
3271199210,4cyclictest0-21swapper/022:13:040
257012210,1sleep00-21swapper/022:24:020
32717992017,2cyclictest7972-21kworker/u8:121:57:053
32717992017,2cyclictest7910-21kworker/u8:023:21:043
32717992017,2cyclictest28380-21kworker/u8:223:18:043
32717992017,2cyclictest16694-21kworker/u8:123:37:053
32717992017,2cyclictest13414-21kworker/u8:023:50:043
32716992016,2cyclictest0-21swapper/221:45:132
3271699200,2cyclictest0-21swapper/221:05:112
32711992017,2cyclictest29541-21kworker/u8:023:42:010
32711992017,2cyclictest2937-21kworker/u8:222:18:050
32711992017,2cyclictest18964-21kworker/u8:022:25:040
3271199200,2cyclictest0-21swapper/023:45:140
3271199200,2cyclictest0-21swapper/023:00:110
3271199200,2cyclictest0-21swapper/021:55:110
3271199200,19cyclictest0-21swapper/020:50:110
32717991916,2cyclictest9422-21kworker/u8:123:08:053
32717991916,2cyclictest16758-21kworker/u8:021:17:043
32717991916,2cyclictest16694-21kworker/u8:123:27:043
32717991915,3cyclictest582-21kworker/u8:222:37:043
3271799190,3cyclictest0-21swapper/322:13:043
32711991916,2cyclictest9422-21kworker/u8:122:53:040
32711991916,2cyclictest6609-21kworker/u8:200:28:040
32711991916,2cyclictest493-21kworker/u8:221:28:010
32711991916,2cyclictest16758-21kworker/u8:021:22:040
32711991916,2cyclictest14930-21kworker/u8:019:54:050
32711991915,3cyclictest25322-21kworker/u8:200:01:040
3271199191,2cyclictest0-21swapper/019:20:120
3271199190,2cyclictest0-21swapper/020:30:110
23822190,1sleep229-21rcuc/221:27:442
32717991815,2cyclictest31944-21kworker/u8:020:34:023
32717991815,2cyclictest26778-21kworker/u8:122:28:043
32717991815,2cyclictest20065-21kworker/u8:000:33:043
32717991815,2cyclictest16694-21kworker/u8:123:45:043
32717991815,2cyclictest16694-21kworker/u8:123:31:043
32717991815,2cyclictest13414-21kworker/u8:023:55:043
32711991815,2cyclictest24367-21kworker/u8:022:07:040
32711991815,2cyclictest24367-21kworker/u8:022:04:050
32717991714,2cyclictest8016-21kworker/u8:219:25:043
32717991714,2cyclictest7910-21kworker/u8:023:13:053
32717991714,2cyclictest6609-21kworker/u8:200:20:053
32717991714,2cyclictest582-21kworker/u8:222:34:013
32717991714,2cyclictest29541-21kworker/u8:023:43:043
32717991714,2cyclictest25322-21kworker/u8:200:08:043
32717991714,2cyclictest25322-21kworker/u8:200:02:043
32717991714,2cyclictest25099-21kworker/u8:200:35:053
32717991714,2cyclictest24367-21kworker/u8:021:54:043
32717991714,2cyclictest15993-21kworker/u8:222:46:053
32717991714,2cyclictest14930-21kworker/u8:020:07:053
32717991714,2cyclictest14930-21kworker/u8:019:59:043
32717991714,2cyclictest11775-21kworker/u8:119:39:043
32717991714,2cyclictest10730-21kworker/u8:122:15:043
3271799170,2cyclictest0-21swapper/322:23:053
3271799170,15cyclictest0-21swapper/300:26:053
32711991714,2cyclictest8016-21kworker/u8:219:31:040
32711991714,2cyclictest7972-21kworker/u8:121:40:050
32711991714,2cyclictest7972-21kworker/u8:121:37:050
32711991714,2cyclictest4772-21kworker/u8:120:43:040
32711991714,2cyclictest25099-21kworker/u8:200:34:040
32711991714,2cyclictest24367-21kworker/u8:021:53:040
32711991714,2cyclictest22500-21kworker/u8:022:56:050
32711991714,2cyclictest16694-21kworker/u8:123:38:040
32711991714,2cyclictest16694-21kworker/u8:123:29:040
32711991714,2cyclictest14930-21kworker/u8:019:56:060
32711991713,3cyclictest582-21kworker/u8:222:40:010
3271199170,2cyclictest16491-21diskmemload23:16:050
3271199170,15cyclictest6808-21tail20:45:130
32717991613,2cyclictest4772-21kworker/u8:120:41:043
32717991613,2cyclictest20547-21kworker/u8:120:24:043
32717991613,2cyclictest16758-21kworker/u8:021:42:043
3271799161,13cyclictest7596-21iostat_ios22:05:163
3271699160,3cyclictest30937-21sh21:56:022
3271699160,14cyclictest0-21swapper/221:33:322
32712991611,3cyclictest23933-21latency_hist21:50:011
3271299160,2cyclictest0-21swapper/121:26:041
3271199161,3cyclictest0-21swapper/020:05:130
32711991613,2cyclictest6609-21kworker/u8:200:20:010
32711991613,2cyclictest31944-21kworker/u8:020:36:040
32711991613,2cyclictest2152-21kworker/u8:221:04:040
32711991613,2cyclictest14930-21kworker/u8:020:12:040
32711991613,2cyclictest10666-21kworker/u8:119:27:040
3271199160,2cyclictest0-21swapper/023:33:040
3271199160,2cyclictest0-21swapper/021:14:020
288812160,0sleep10-21swapper/123:31:371
32717991512,2cyclictest2152-21kworker/u8:221:07:043
32717991512,2cyclictest10666-21kworker/u8:119:17:053
32717991512,2cyclictest10666-21kworker/u8:119:13:043
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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