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2026-08-27 - 03:04

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 Wed Aug 26, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2248175997629,10cyclictest2251899-21apt-key07:30:011
224817399591,20cyclictest12-21ksoftirqd/010:40:010
2248175995513,37cyclictest2249116-21interrupts07:15:021
2248175995513,37cyclictest2249116-21interrupts07:15:021
2248173995424,27cyclictest0-21swapper/010:20:200
2248175995347,4cyclictest0-21swapper/110:00:021
2248173995139,9cyclictest2271297-21phc2sys-jitter09:20:270
2248179995015,21cyclictest2276844-21/usr/sbin/munin09:55:202
2248179995015,21cyclictest2276844-21/usr/sbin/munin09:55:192
2248173995022,24cyclictest2303000-21sendmail_mailqu12:25:250
2248173994925,21cyclictest20650irq/252-8000000.ethernet10:00:010
2248173994925,21cyclictest20650irq/252-8000000.ethernet10:00:010
2248173994920,23cyclictest0-21swapper/008:35:010
2248179994839,5cyclictest2287711-21apt11:00:002
2248175994841,4cyclictest2268213-21munin-plugin-st09:05:011
2248173994825,20cyclictest20650irq/252-8000000.ethernet08:20:000
2248173994824,21cyclictest20650irq/252-8000000.ethernet08:55:270
2248173994821,23cyclictest2248996-21munin-node07:15:020
2248173994818,24cyclictest2291378-21cat11:20:020
2248179994739,5cyclictest2297096-21systemd-journal11:55:002
2248179994732,9cyclictest0-21swapper/207:20:272
2248173994737,6cyclictest2289339-21grep11:05:290
2248173994737,6cyclictest2289339-21grep11:05:290
2248173994729,10cyclictest0-21swapper/010:10:010
2248173994725,19cyclictest20650irq/252-8000000.ethernet11:20:180
2248173994725,19cyclictest20650irq/252-8000000.ethernet10:50:260
2248173994725,19cyclictest20650irq/252-8000000.ethernet08:10:250
2248173994724,20cyclictest20650irq/252-8000000.ethernet12:20:200
2248173994724,20cyclictest20650irq/252-8000000.ethernet08:45:000
2248173994724,20cyclictest20650irq/252-8000000.ethernet08:00:230
2248173994724,20cyclictest20650irq/252-8000000.ethernet08:00:230
2248173994724,19cyclictest20650irq/252-8000000.ethernet11:40:010
2248179994639,5cyclictest311ktimers/212:25:172
2248179994639,4cyclictest2299665-21unixbench_singl12:05:272
2248173994625,19cyclictest20650irq/252-8000000.ethernet11:00:260
2248173994625,19cyclictest20650irq/252-8000000.ethernet10:00:170
2248173994624,19cyclictest20650irq/252-8000000.ethernet11:30:230
2248173994624,19cyclictest20650irq/252-8000000.ethernet11:30:230
2248173994624,19cyclictest20650irq/252-8000000.ethernet09:10:160
2248173994623,20cyclictest20650irq/252-8000000.ethernet12:35:150
2248173994623,20cyclictest20650irq/252-8000000.ethernet12:05:180
2248173994623,20cyclictest20650irq/252-8000000.ethernet09:30:160
2248173994623,20cyclictest20650irq/252-8000000.ethernet09:00:160
2248173994620,24cyclictest0-21swapper/007:15:010
2248173994620,24cyclictest0-21swapper/007:15:000
2248179994536,5cyclictest2291924-21unixbench_multi11:20:292
2248175994536,5cyclictest2281819-21munin-plugin-st10:24:591
2248173994524,19cyclictest20650irq/252-8000000.ethernet11:45:250
2248173994523,20cyclictest20650irq/252-8000000.ethernet08:35:240
2248173994523,19cyclictest20650irq/252-8000000.ethernet10:55:180
2248173994523,19cyclictest20650irq/252-8000000.ethernet07:45:230
2248179994432,9cyclictest2250126-21sendmail07:19:592
2248179994432,7cyclictest0-21swapper/210:35:302
2248173994422,20cyclictest20650irq/252-8000000.ethernet07:35:190
2248173994418,21cyclictest0-21swapper/007:45:000
2248173994418,20cyclictest0-21swapper/007:10:000
224817399441,41cyclictest0-21swapper/010:15:110
224817399440,30cyclictest167350irq/118-8000000.ethernet-tx009:55:000
2248179994332,7cyclictest0-21swapper/212:35:292
2248175994335,4cyclictest2260504-21cron08:19:591
2248173994322,18cyclictest20650irq/252-8000000.ethernet12:00:140
2248173994320,21cyclictest20650irq/252-8000000.ethernet11:55:050
2248173994320,21cyclictest20650irq/252-8000000.ethernet11:55:050
2248173994320,21cyclictest0-21swapper/009:35:290
2248173994319,22cyclictest2257005-21uptime07:55:290
2248173994319,21cyclictest0-21swapper/012:20:010
2248173994319,21cyclictest0-21swapper/012:20:010
2248179994228,11cyclictest0-21swapper/208:50:292
224817599428,26cyclictest0-21swapper/112:15:271
224817599428,26cyclictest0-21swapper/112:15:271
2248175994229,9cyclictest2304870-21run-parts12:40:001
2248175994226,11cyclictest0-21swapper/107:20:011
224817599421,33cyclictest1653-21lldpd08:10:181
2248173994228,10cyclictest0-21swapper/011:55:000
2248173994221,19cyclictest0-21swapper/010:25:240
2248173994220,19cyclictest2279783-21open_inodes10:10:260
2248173994219,21cyclictest0-21swapper/007:30:010
224817399421,4cyclictest2250107-21apt-get07:20:030
2248179994129,8cyclictest0-21swapper/212:20:302
2248179994129,7cyclictest0-21swapper/211:30:272
2248179994129,7cyclictest0-21swapper/211:30:262
2248179994127,9cyclictest2264701-21grep08:40:282
2248175994133,5cyclictest2256198-21munin-plugin-st07:55:011
2248173994134,5cyclictest20850irq/208-8000000.ethernet09:45:280
2248173994121,18cyclictest20650irq/252-8000000.ethernet09:40:190
2248173994119,20cyclictest20650irq/252-8000000.ethernet11:25:200
2248173994118,21cyclictest0-21swapper/011:20:000
2248173994117,21cyclictest2283555-21latency_hist10:35:000
2248179994031,4cyclictest0-21swapper/208:50:002
2248179994026,10cyclictest0-21swapper/210:10:292
2248175994033,4cyclictest167450irq/126-8000000.ethernet-tx107:35:261
2248175994032,5cyclictest2290248-21apt11:15:001
224817399406,29cyclictest0-21swapper/008:55:010
2248173994032,6cyclictest0-21swapper/008:05:150
2248173994031,5cyclictest0-21swapper/009:15:290
2248173994031,5cyclictest0-21swapper/009:15:290
2248173994018,20cyclictest0-21swapper/011:40:210
2248173994018,20cyclictest0-21swapper/009:05:250
2248173994018,19cyclictest2265507-21unixbench_singl08:45:270
2248179993931,4cyclictest0-21swapper/209:30:252
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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