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2026-08-24 - 14:44

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 Mon Aug 24, 2026 12:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
82806199112108,3cyclictest0-21swapper/112:32:441
82806199112108,3cyclictest0-21swapper/112:32:441
828059996656,7cyclictest1072675-21latency_hist11:15:010
11318142600,4chrt0-21swapper/112:12:541
828059995953,4cyclictest854523-21kworker/u8:3+events_unbound08:40:000
828059995953,4cyclictest854523-21kworker/u8:3+events_unbound08:40:000
828061995649,5cyclictest1053405-21apt-get10:57:321
828059995443,8cyclictest1121575-21ntpq12:02:470
828061995042,6cyclictest1038146-21latency_hist10:40:001
828059995043,5cyclictest36616-21kworker/u8:2+flush-8:008:07:390
828059995034,15cyclictest0-21swapper/012:32:440
828059995034,15cyclictest0-21swapper/012:32:440
828066994637,7cyclictest1137211-21awk12:20:002
828066994433,8cyclictest903478-21ntpq08:22:462
828061994434,8cyclictest938315-21ntpq08:57:491
828061994429,5cyclictest929649-21apt-get08:52:341
828059994432,9cyclictest275-21systemd-journal11:05:010
828059994338,3cyclictest775982-21kworker/u8:1+events_unbound10:05:000
828059994337,4cyclictest275-21systemd-journal08:48:310
828066994236,3cyclictest1151194-21strings12:32:442
828066994236,3cyclictest1151194-21strings12:32:442
828066994235,5cyclictest36616-21kworker/u8:2+flush-8:008:17:392
828059994238,3cyclictest854523-21kworker/u8:3+flush-8:008:32:390
828059994238,3cyclictest854523-21kworker/u8:3+flush-8:008:32:390
828059994232,7cyclictest275-21systemd-journal08:42:400
828061994134,4cyclictest1137182-21latency_hist12:20:011
828061994130,8cyclictest275-21systemd-journal07:55:001
828059994136,4cyclictest973935-21kworker/u8:0+flush-8:009:37:520
828059994135,4cyclictest775982-21kworker/u8:1+flush-8:007:47:360
828059994131,8cyclictest973935-21kworker/u8:0+flush-8:011:20:020
828061994031,7cyclictest1111727-21ntpq11:52:471
828061993931,6cyclictest973935-21kworker/u8:0+flush-8:011:27:511
828059993934,3cyclictest36828-21kworker/u8:3+flush-8:007:20:310
828059993933,4cyclictest893650-21ntpq08:12:490
828061993830,6cyclictest275-21systemd-journal10:33:311
828061993830,6cyclictest275-21systemd-journal10:33:311
828059993827,8cyclictest1023085-21latency_hist10:25:000
82805999381,34cyclictest1-21systemd07:36:310
828066993726,8cyclictest1142131-21awk12:25:002
828061993729,6cyclictest1122334-21latency_hist12:05:011
828061993729,6cyclictest1008281-21latency_hist10:10:011
828061993723,10cyclictest1077593-21apt-get11:20:001
828059993733,3cyclictest36616-21kworker/u8:2+flush-8:008:02:380
828059993730,5cyclictest775982-21kworker/u8:1+flush-8:007:15:060
828059993729,5cyclictest993466-21latency_hist09:55:010
828059993728,7cyclictest1093356-21diskstats11:37:370
828066993630,5cyclictest36616-21kworker/u8:2+flush-8:007:12:372
828066993625,8cyclictest1027545-21ntpq10:27:472
828061993626,8cyclictest1156243-21ntpq12:37:501
828061993622,7cyclictest1117335-21latency_hist12:00:011
828059993631,4cyclictest924089-21kworker/u8:2+events_unbound08:57:430
828059993629,5cyclictest1033073-21kworker/u8:2+events_unbound11:20:000
828061993526,7cyclictest1062056-21ntpq11:02:461
828059993529,4cyclictest1106679-21kworker/u8:3+flush-8:011:52:360
828059993527,6cyclictest775982-21kworker/u8:1+flush-8:009:12:480
8277932354,9sleep10-21swapper/107:08:321
828061993430,2cyclictest836032-21irqrtprio07:17:411
828061993428,4cyclictest275-21systemd-journal09:26:301
828066993328,3cyclictest36828-21kworker/u8:3+flush-8:007:22:402
828061993328,3cyclictest1098124-21aten2_r5power_p11:42:361
828061993326,5cyclictest973713-21latency_hist09:35:011
828059993329,2cyclictest1-21systemd07:14:310
828059993327,4cyclictest854523-21kworker/u8:3+flush-8:007:52:510
828066993228,3cyclictest1127283-21cron12:10:002
828066993223,7cyclictest275-21systemd-journal11:01:302
828061993229,2cyclictest1014381-21irqrtprio10:17:411
828061993225,5cyclictest1067738-21latency_hist11:10:011
828059993227,4cyclictest854523-21kworker/u8:3+events_unbound08:27:490
828059993227,4cyclictest854523-21kworker/u8:3+events_unbound08:27:490
828059993227,3cyclictest973935-21kworker/u8:0+flush-8:011:45:310
828059993223,6cyclictest879532-21latency_hist08:00:010
828066993122,7cyclictest1077581-21cron11:20:002
828061993126,3cyclictest1082515-21unixbench_multi11:22:541
828059993127,3cyclictest1152736-21cut12:37:390
828059993126,4cyclictest775982-21kworker/u8:1+flush-8:010:12:440
828066993019,9cyclictest913462-21ntpq08:32:512
828066993019,9cyclictest913462-21ntpq08:32:512
828061993026,2cyclictest0-21swapper/108:00:001
828061993022,2cyclictest161rcu_preempt10:47:371
828061993021,7cyclictest1003355-21latency_hist10:05:011
828059993026,3cyclictest775982-21kworker/u8:1+flush-8:010:16:010
828059993026,2cyclictest1123501-21irqrtprio12:07:410
828059993024,5cyclictest844083-21kworker/u8:0+flush-8:007:27:360
828059993024,4cyclictest959139-21kworker/u8:3+flush-8:009:22:410
828059993023,5cyclictest1063248-21/usr/sbin/munin11:07:470
828059993022,6cyclictest973935-21kworker/u8:0+flush-8:010:25:020
8278712304,9sleep20-21swapper/207:09:332
828066992925,2cyclictest989052-21aten2_r5power_e09:52:362
828066992925,2cyclictest939594-21aten2_r5power_e09:02:352
828066992924,3cyclictest839801-21sendmail07:20:002
82806199296,16cyclictest918876-21sed08:37:531
82806199296,16cyclictest918876-21sed08:37:531
828061992923,4cyclictest844509-21unixbench_multi07:22:521
828061992923,4cyclictest1042902-21grep10:42:531
828061992922,5cyclictest904676-21apt-get08:27:331
828061992922,5cyclictest904676-21apt-get08:27:331
828061992922,5cyclictest275-21systemd-journal09:13:311
828061992921,2cyclictest161rcu_preempt11:37:501
828059992923,4cyclictest973935-21kworker/u8:0+flush-8:010:42:510
828059992923,4cyclictest775982-21kworker/u8:1+events_unbound10:52:330
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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