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2026-09-02 - 20:29

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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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  Intel
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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack5slot4s.osadl.org (updated Wed Sep 02, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26716542540,3chrt575-21kworker/3:2-events11:37:363
25939232520,1sleep02593926-21wc10:20:000
2402759995244,6cyclictest275-21systemd-journal09:10:001
2402754995131,17cyclictest2463740-21grep08:07:470
2402759995042,5cyclictest2439358-21latency_hist07:45:011
24221732490,1chrt2422176-21kthreadcore07:27:370
2402759994942,5cyclictest2578603-21kworker/u8:2+flush-8:010:32:441
2402759994941,6cyclictest2628465-21latency_hist10:55:011
2402759994738,6cyclictest2668341-21latency_hist11:35:011
2402754994637,6cyclictest2608680-21latency_hist10:35:010
2402754994626,8cyclictest2553024-21ntpq09:37:400
2402754994536,6cyclictest2473926-21latency_hist08:20:010
2402754994528,15cyclictest2623525-21true10:50:010
2402754994527,3cyclictest2652633-21needreboot11:17:380
2402759994438,4cyclictest2663707-21kworker/u8:2+flush-8:012:37:321
2402759994437,5cyclictest2623743-21kworker/u8:0+flush-8:011:02:431
2402759994436,5cyclictest2402593-21latency_hist07:10:011
2402759994435,7cyclictest2698376-21/usr/sbin/munin12:07:451
2402754994427,6cyclictest2588920-21latency_hist10:15:010
26446522430,1sleep02644654-21irqcore11:12:330
2402754994335,6cyclictest2493925-21latency_hist08:40:010
2402754994319,9cyclictest2712018-21ntpq12:17:390
2402759994238,3cyclictest1588510-21kworker/u8:4+flush-8:008:07:311
2402759994132,7cyclictest2488523-21kworker/u8:3+events_unbound09:17:411
2402754994131,8cyclictest2564657-21diskstats09:52:310
2402759994032,6cyclictest2614050-21/usr/sbin/munin10:42:451
2402754994032,6cyclictest275-21systemd-journal12:00:000
2402759993935,3cyclictest2488523-21kworker/u8:3+events_unbound08:57:311
2402759993934,4cyclictest2402611-21kworker/u8:2+flush-8:008:42:481
2402759993934,4cyclictest2402611-21kworker/u8:2+flush-8:007:52:461
2402759993832,5cyclictest2603746-21kworker/u8:3+events_unbound11:42:401
2402759993832,4cyclictest2663707-21kworker/u8:2+flush-8:012:17:311
2402754993828,8cyclictest2440041-21diskstats07:47:310
2402764993731,4cyclictest2583837-21gpgv10:09:592
2402759993631,3cyclictest2653704-21kworker/u8:0+flush-8:012:00:311
2402759993631,3cyclictest2419944-21apt-get07:27:271
2402759993630,4cyclictest2419766-21kworker/u8:1+events_unbound07:32:361
2402759993629,5cyclictest2717754-21latency_hist12:25:011
2402759993629,5cyclictest2578764-21cron10:05:001
2402759993627,7cyclictest2594294-21apt-get10:22:271
2402754993617,4cyclictest0-21swapper/007:22:270
2402759993531,3cyclictest2402611-21kworker/u8:2+events_unbound09:02:481
2402759993529,4cyclictest2653902-21apt-get11:22:291
2402759993429,4cyclictest2653704-21kworker/u8:0+flush-8:011:47:321
2402759993429,3cyclictest275-21systemd-journal09:15:001
2402759993425,7cyclictest1588510-21kworker/u8:4+flush-8:007:47:421
2402759993328,4cyclictest2637658-21kworker/u8:1+events_unbound11:27:451
2402759993328,4cyclictest2603746-21kworker/u8:3+flush-8:012:32:311
2402759993327,4cyclictest2568875-21latency_hist09:55:011
2402759993227,4cyclictest2429629-21kworker/u8:0+flush-8:008:22:451
2402759993226,4cyclictest2653704-21kworker/u8:0+events_unbound11:57:391
2402759993226,4cyclictest2548808-21cron09:35:001
2402759993226,4cyclictest2402611-21kworker/u8:2+events_unbound07:22:461
2402759993225,5cyclictest2469514-21aten2_r5power_v08:17:291
2402759993222,7cyclictest275-21systemd-journal10:00:001
240275499328,22cyclictest2419541-21kworker/0:2+events08:02:310
240275499328,22cyclictest2419541-21kworker/0:2+events08:02:310
240275499326,24cyclictest2613676-21kworker/0:0+events11:27:280
240275499321,29cyclictest1049636-21kworker/0:1+events07:17:410
2402764993127,3cyclictest2583863-21kworker/u8:1+events_unbound10:47:462
2402764993126,4cyclictest2554057-21kworker/u8:3+flush-8:009:47:512
2402764993126,4cyclictest2429629-21kworker/u8:0+flush-8:007:42:372
2402764993125,4cyclictest2637658-21kworker/u8:1+flush-8:011:20:302
2402764993123,6cyclictest275-21systemd-journal09:09:542
2402759993126,4cyclictest2052013-21kworker/u8:0+flush-8:007:12:501
2402759993125,4cyclictest2603746-21kworker/u8:3+events_unbound12:27:311
2402759993125,4cyclictest2588910-21cron10:15:001
2402759993125,4cyclictest2554490-21cpuspeed_turbos09:42:301
2402759993124,5cyclictest2663707-21kworker/u8:2+flush-8:011:37:341
2402759993124,5cyclictest2578603-21kworker/u8:2+events_unbound10:27:291
2402754993124,5cyclictest2643310-21apt-get11:10:010
2402754993124,5cyclictest2638120-21grep11:02:480
2402754993123,6cyclictest2559449-21/usr/sbin/munin09:47:450
2402759993025,4cyclictest2603746-21kworker/u8:3+events_unbound11:17:331
2402759993025,4cyclictest2548838-21kworker/u8:0+events_unbound10:07:431
2402759993024,4cyclictest2707586-21unixbench_multi12:12:471
2402759993023,5cyclictest1588510-21kworker/u8:4+flush-8:008:12:421
2402759993022,6cyclictest2483777-21cron08:30:001
2402759993022,6cyclictest1588510-21kworker/u8:4+flush-8:008:02:421
2402759993022,6cyclictest1588510-21kworker/u8:4+flush-8:008:02:421
2402759993022,6cyclictest0-21swapper/108:37:341
2402754993021,7cyclictest2543128-21ntpq09:27:400
2402754993021,6cyclictest275-21systemd-journal12:10:000
2402754993020,8cyclictest275-21systemd-journal08:00:000
240275499301,28cyclictest2509010-21kworker/0:1+events09:00:000
240275499301,27cyclictest2613676-21kworker/0:0+events12:27:270
2402764992925,2cyclictest275-21systemd-journal08:50:002
2402759992925,3cyclictest2553798-21ls09:40:001
2402759992924,3cyclictest2536187-21kworker/u8:1+events_unbound09:30:011
240275499299,18cyclictest2613676-21kworker/0:0+events10:57:430
2402754992922,5cyclictest2554235-21/usr/sbin/munin09:42:460
2402754992920,7cyclictest2496531-21kthreadcore08:42:380
2402754992919,8cyclictest275-21systemd-journal11:25:010
240275499291,27cyclictest2419541-21kworker/0:2+events08:47:330
240275499291,26cyclictest2538838-21kworker/0:1+events10:22:420
240275499291,26cyclictest2419541-21kworker/0:2+events07:42:470
2402754992910,18cyclictest2518909-21kworker/0:0+events09:22:370
2402764992825,2cyclictest2712810-21idleruntime-cro12:20:002
2402764992825,2cyclictest2594518-21cpuspeed_turbos10:22:312
2402764992824,3cyclictest2402611-21kworker/u8:2+events_unbound09:25:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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