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2026-05-11 - 23:06

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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 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.

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 rackeslot6s.osadl.org (updated Mon May 11, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
13651199872,79cyclictest157200-21latency_hist09:10:010
136513998574,8cyclictest0-21swapper/110:55:001
136513998574,8cyclictest0-21swapper/110:55:001
13651199785,2cyclictest0-21swapper/008:55:010
13651199785,2cyclictest0-21swapper/008:55:010
13651199761,68cyclictest169204-21latency_hist10:20:010
13651199761,68cyclictest157039-21apt-get09:10:060
13651199721,64cyclictest190566-21cut12:25:000
13651199702,5cyclictest174471-21/usr/sbin/munin10:50:180
13651199702,5cyclictest174471-21/usr/sbin/munin10:50:180
13651199692,63cyclictest0-21swapper/009:20:200
13651199692,63cyclictest0-21swapper/009:20:200
13651199682,3cyclictest175239-21/usr/sbin/munin10:55:120
13651199682,3cyclictest146772-21/usr/sbin/munin08:05:280
13651199681,64cyclictest141753-21/usr/sbin/munin07:35:270
13651199673,5cyclictest0-21swapper/011:45:000
13651199671,63cyclictest187548-21/usr/sbin/munin12:05:250
13651199671,63cyclictest149266-21mailstats08:20:270
13651199661,62cyclictest140145-21munin-run07:30:000
13651199661,4cyclictest144618-21df07:55:170
13651199661,3cyclictest188347-21irqstats12:10:240
13651199652,4cyclictest162281-21apt09:40:000
13651199651,4cyclictest143984-21irqstats07:50:240
13651199651,3cyclictest143186-21memory07:45:260
13651199651,3cyclictest137867-21df_inode07:15:170
136515996413,18cyclictest139504-21/usr/sbin/munin07:25:192
13651199641,60cyclictest148204-21irqstats08:15:210
13651199641,57cyclictest0-21swapper/010:05:280
13651199641,4cyclictest164476-21meminfo09:50:250
13651199631,59cyclictest0-21swapper/008:55:160
13651199631,3cyclictest171005-21diskstats10:30:180
13651199631,3cyclictest167627-21diskstats10:10:190
136511996228,28cyclictest0-21swapper/011:30:190
13651199622,3cyclictest184670-21/usr/sbin/munin11:50:160
136511996220,35cyclictest0-21swapper/011:00:190
13651199621,58cyclictest163502-21tune2fs09:45:190
13651199621,58cyclictest149785-21tune2fs08:25:210
13651199621,3cyclictest173273-21munin-run10:45:010
13651199621,3cyclictest173273-21munin-run10:45:010
13651199621,3cyclictest158562-21memory09:15:260
13651199621,2cyclictest0-21swapper/012:40:010
13651199612,3cyclictest152109-21latency_hist08:40:020
13651199611,28cyclictest0-21swapper/012:00:150
136511996024,4cyclictest20850irq/208-8000000.ethernet10:35:240
13651199601,56cyclictest179093-21grep11:15:300
13651199601,4cyclictest182407-21phc2sys11:35:270
13651199601,3cyclictest190697-21diskstats12:25:180
13651199591,56cyclictest0-21swapper/009:00:210
13651199591,56cyclictest0-21swapper/008:45:010
13651199591,52cyclictest0-21swapper/010:45:120
13651199591,3cyclictest183836-21df11:45:150
13651199591,3cyclictest183836-21df11:45:150
13651199591,22cyclictest136567-21sort07:10:020
136511995822,5cyclictest0-21swapper/008:30:280
13651199581,54cyclictest0-21swapper/012:30:140
13651199581,50cyclictest0-21swapper/011:25:020
13651199581,3cyclictest185638-21perl11:55:220
13651199581,2cyclictest0-21swapper/007:25:010
13651199579,18cyclictest0-21swapper/011:30:010
13651199572,4cyclictest178524-21date11:15:010
13651199571,54cyclictest0-21swapper/011:05:280
13651199571,54cyclictest0-21swapper/008:10:250
13651199571,2cyclictest0-21swapper/010:00:010
136511995627,4cyclictest167350irq/118-8000000.ethernet-tx010:20:230
13651199561,52cyclictest136764-21fschecks_count07:10:190
136511995425,26cyclictest0-21swapper/007:40:290
13651199542,47cyclictest0-21swapper/007:35:010
13651199534,28cyclictest0-21swapper/012:15:190
13651199521,3cyclictest0-21swapper/009:25:150
13651199521,28cyclictest0-21swapper/008:45:260
13651599517,10cyclictest186957-21apt-get12:05:012
136515995128,15cyclictest311ktimers/209:50:122
136511995143,5cyclictest0-21swapper/010:00:130
136511995143,5cyclictest0-21swapper/010:00:130
13651199511,2cyclictest160802-21apt-get09:30:110
136513995034,10cyclictest231ktimers/110:55:171
13651599491,4cyclictest0-21swapper/209:00:182
136513994941,4cyclictest146065-21munin-plugin-st08:05:001
136513994937,7cyclictest0-21swapper/107:50:281
136513994841,5cyclictest231ktimers/108:30:151
136513994835,8cyclictest0-21swapper/109:45:261
136513994736,7cyclictest179196-21grep11:15:311
13651599469,17cyclictest176939-21/usr/sbin/munin11:05:192
136515994636,7cyclictest167356-21munin-plugin-st10:10:002
136515994633,8cyclictest14-21rcu_preempt12:20:302
136515994628,12cyclictest0-21swapper/210:20:022
136515994626,16cyclictest311ktimers/208:40:142
136513994537,5cyclictest165660-21apt10:00:001
136513994534,7cyclictest156946-21grep09:05:291
136513994531,10cyclictest162246-21grep09:35:281
136513994530,11cyclictest231ktimers/110:15:111
13651199451,30cyclictest0-21swapper/009:40:270
136515994430,10cyclictest0-21swapper/211:55:292
136513994434,5cyclictest14-21rcu_preempt11:30:001
136513994430,8cyclictest0-21swapper/112:20:291
13651199441,30cyclictest0-21swapper/010:25:280
13651599435,13cyclictest0-21swapper/211:20:002
136515994323,14cyclictest311ktimers/210:25:142
136513994332,8cyclictest182737-21munin-plugin-st11:40:001
136513994331,8cyclictest163041-21grep09:40:281
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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