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2026-06-21 - 11:01

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 Sun Jun 21, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
234705799806,4cyclictest2382150-21unixbench_singl22:30:310
234705799806,4cyclictest2382150-21unixbench_singl22:30:310
234705799791,2cyclictest0-21swapper/021:15:010
234705799791,2cyclictest0-21swapper/021:15:000
2347057997671,3cyclictest131ktimers/000:30:010
2347060997358,6cyclictest2347054-21cyclictest19:10:011
2347060997348,6cyclictest2402859-21apt-key00:35:011
234705799731,9cyclictest2387021-21/usr/sbin/munin23:00:210
234705799731,7cyclictest2356536-21/usr/sbin/munin20:00:280
2347057997123,6cyclictest20850irq/208-8000000.ethernet21:05:270
234705799711,6cyclictest2391266-21df23:25:160
234705799711,3cyclictest2354791-21sed19:50:280
2347057996941,23cyclictest2373049-21sh21:40:190
234705799691,6cyclictest2392635-21unixbench_singl23:30:270
234705799691,5cyclictest2362914-21sh20:40:190
2347057996728,5cyclictest0-21swapper/023:40:280
2347057996628,32cyclictest0-21swapper/000:00:210
2347057996628,32cyclictest0-21swapper/000:00:210
2347060996520,35cyclictest22-21rcuc/122:15:011
2347060996520,35cyclictest22-21rcuc/122:15:011
2347057996537,25cyclictest0-21swapper/020:10:270
2347057996531,7cyclictest2390978-21grep23:20:290
2347057996531,7cyclictest2390978-21grep23:20:290
2347057996425,6cyclictest0-21swapper/021:50:180
2347057996236,23cyclictest2380427-21cron22:25:000
2347057996128,4cyclictest20850irq/208-8000000.ethernet20:55:170
2347057996031,5cyclictest0-21swapper/022:55:000
2347057995830,4cyclictest0-21swapper/020:50:140
2347057995635,2cyclictest0-21swapper/023:10:210
234705799541,5cyclictest2400300-21munin-plugin-st00:20:000
2347057995335,15cyclictest131ktimers/019:35:130
2347057995335,15cyclictest131ktimers/019:35:130
234706099525,15cyclictest22-21rcuc/122:30:011
2347060995136,9cyclictest0-21swapper/123:15:001
2347057995140,8cyclictest2390081-21sendmail23:20:000
2347061995041,5cyclictest2403729-21unixbench_singl00:35:282
2347057995033,13cyclictest131ktimers/020:35:120
2347060994930,14cyclictest231ktimers/120:05:131
234705799493,13cyclictest2328243-21kworker/0:2+events_long22:10:150
234705799493,13cyclictest2328243-21kworker/0:2+events_long22:10:150
2347057994917,28cyclictest0-21swapper/021:35:290
2347057994917,28cyclictest0-21swapper/021:35:290
2347061994844,2cyclictest0-21swapper/222:40:012
2347061994844,2cyclictest0-21swapper/222:40:012
2347060994832,12cyclictest231ktimers/119:25:141
2347057994838,6cyclictest2366830-21munin-plugin-st21:05:010
234705799481,3cyclictest0-21swapper/023:50:020
234705799481,17cyclictest0-21swapper/022:45:020
234706199476,17cyclictest30-21rcuc/221:50:012
234705799473,9cyclictest2377128-21gpg-connect-age22:05:010
2347057994727,16cyclictest131ktimers/000:10:130
2347060994631,12cyclictest231ktimers/123:00:101
2347057994639,3cyclictest0-21swapper/019:40:100
2347057994638,4cyclictest167350irq/118-8000000.ethernet-tx021:20:210
2347060994530,9cyclictest0-21swapper/119:50:281
234706199448,12cyclictest2347220-21/usr/sbin/munin19:10:192
2347061994432,8cyclictest2382939-21grep22:35:282
2347061994430,9cyclictest0-21swapper/200:35:012
2347061994426,9cyclictest0-21swapper/223:45:282
2347060994433,8cyclictest14-21rcu_preempt22:45:001
2347060994433,8cyclictest14-21rcu_preempt22:45:001
2347057994431,8cyclictest0-21swapper/020:35:000
2347057994431,8cyclictest0-21swapper/020:34:590
2347061994333,7cyclictest2379510-21grep22:15:282
2347061994333,4cyclictest2381462-21apt-get22:30:012
2347061994331,7cyclictest0-21swapper/200:25:302
2347061994330,9cyclictest0-21swapper/220:55:292
2347060994336,5cyclictest22-21rcuc/119:15:021
2347057994331,8cyclictest0-21swapper/019:55:210
234705799432,37cyclictest2396604-21phc2sys23:55:250
234706199426,29cyclictest0-21swapper/223:30:272
2347061994233,5cyclictest0-21swapper/221:25:302
2347061994224,10cyclictest0-21swapper/223:10:252
234706199421,32cyclictest2355683-21unixbench_singl19:55:292
2347061994212,19cyclictest2384189-21/usr/sbin/munin22:45:182
2347060994227,10cyclictest0-21swapper/119:15:021
2347061994132,6cyclictest2351412-21grep19:30:292
2347061994128,9cyclictest0-21swapper/223:40:282
2347060994135,3cyclictest2393536-21sh23:40:001
2347060994131,6cyclictest0-21swapper/123:55:271
2347060994131,5cyclictest0-21swapper/100:00:291
2347060994131,5cyclictest0-21swapper/100:00:291
2347060994123,11cyclictest0-21swapper/100:20:291
2347057994126,10cyclictest0-21swapper/022:30:020
234705799411,38cyclictest0-21swapper/019:45:120
234705799411,35cyclictest0-21swapper/021:15:020
2347061994030,5cyclictest0-21swapper/200:20:232
2347061994011,13cyclictest2364488-21/usr/sbin/munin20:50:182
2347061994010,19cyclictest2397972-21/usr/sbin/munin00:05:192
2347060994031,5cyclictest0-21swapper/122:00:171
2347060994029,7cyclictest2359100-21unixbench_multi20:15:301
2347060994028,7cyclictest0-21swapper/100:10:271
2347060994028,6cyclictest2395234-21munin-plugin-st23:50:001
2347060994025,10cyclictest231ktimers/119:55:131
234706099401,4cyclictest0-21swapper/123:25:011
234706099401,4cyclictest0-21swapper/123:25:011
2347057994034,4cyclictest0-21swapper/000:05:250
2347057994031,4cyclictest0-21swapper/019:30:280
234705799402,3cyclictest2359950-21/usr/sbin/munin20:20:290
2347061993931,4cyclictest167550irq/134-8000000.ethernet-tx223:00:292
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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