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
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

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 Sat Aug 29, 2026 12:44:14)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3655016	2	63	0,9	sleep1	29	1	ktimers/1	09:17:40	1
3525615	99	52	42,7	cyclictest	275	-21	systemd-journal	07:20:00	1
3818618	2	50	0,3	sleep3	575	-21	kworker/3:2-events	12:02:39	3
3525612	99	48	40,5	cyclictest	3646785	-21	latency_hist	09:10:01	0
3525615	99	47	43,3	cyclictest	3637189	-21	kworker/u8:2+events_unbound	10:17:31	1
3525615	99	46	41,3	cyclictest	3557474	-21	kworker/u8:3+events_unbound	08:25:00	1
3525615	99	44	38,5	cyclictest	3637189	-21	kworker/u8:2+flush-8:0	10:37:33	1
3525615	99	43	37,4	cyclictest	3631753	-21	kworker/u8:0+flush-8:0	09:32:44	1
3525617	99	42	33,6	cyclictest	275	-21	systemd-journal	08:15:00	2
3525617	99	42	33,6	cyclictest	275	-21	systemd-journal	08:15:00	2
3525615	99	42	36,4	cyclictest	3696332	-21	cp	10:00:00	1
3525615	99	42	36,4	cyclictest	3631753	-21	kworker/u8:0+events_unbound	09:47:46	1
3525615	99	42	35,5	cyclictest	3488834	-21	kworker/u8:1+flush-8:0	08:42:46	1
3525615	99	42	34,5	cyclictest	275	-21	systemd-journal	07:55:00	1
3525615	99	41	37,3	cyclictest	3637189	-21	kworker/u8:2+events_unbound	09:12:33	1
3525615	99	41	36,4	cyclictest	3805973	-21	kworker/u8:0+events_unbound	12:02:39	1
3525615	99	41	35,5	cyclictest	3631753	-21	kworker/u8:0+flush-8:0	09:07:45	1
3525615	99	41	35,4	cyclictest	3805973	-21	kworker/u8:0+flush-8:0	12:12:44	1
3525615	99	40	35,4	cyclictest	3840209	-21	kworker/u8:3+events_unbound	12:32:36	1
3525615	99	40	35,3	cyclictest	3726473	-21	kworker/u8:0+events_unbound	11:07:38	1
3525615	99	40	35,3	cyclictest	3726473	-21	kworker/u8:0+events_unbound	11:07:38	1
3525615	99	40	34,4	cyclictest	3637189	-21	kworker/u8:2+flush-8:0	10:07:38	1
3525615	99	40	34,4	cyclictest	3557474	-21	kworker/u8:3+events_unbound	08:17:34	1
3525615	99	40	33,5	cyclictest	3488834	-21	kworker/u8:1+events_unbound	08:07:34	1
3525615	99	39	34,3	cyclictest	3661908	-21	kworker/u8:3+events_unbound	09:27:43	1
3525615	99	39	33,4	cyclictest	3781278	-21	kworker/u8:1+events_unbound	12:37:33	1
3525615	99	39	33,4	cyclictest	3637189	-21	kworker/u8:2+events_unbound	10:22:35	1
3525615	99	39	32,5	cyclictest	3631753	-21	kworker/u8:0+flush-8:0	09:22:46	1
3525612	99	39	2,32	cyclictest	3557196	-21	kworker/0:2+events	09:56:40	0
3525615	99	38	34,3	cyclictest	3637189	-21	kworker/u8:2+flush-8:0	09:52:48	1
3525615	99	38	34,3	cyclictest	3542603	-21	kworker/u8:2+flush-8:0	07:27:49	1
3525615	99	38	33,4	cyclictest	3781278	-21	kworker/u8:1+flush-8:0	11:52:33	1
3525615	99	38	33,4	cyclictest	3557474	-21	kworker/u8:3+events_unbound	08:27:34	1
3525615	99	38	32,5	cyclictest	3488834	-21	kworker/u8:1+flush-8:0	07:10:37	1
3525615	99	38	32,4	cyclictest	3696041	-21	kworker/u8:3+events_unbound	11:32:39	1
3525615	99	37	33,3	cyclictest	3781278	-21	kworker/u8:1+events_unbound	12:10:01	1
3525615	99	37	30,5	cyclictest	3771251	-21	kworker/u8:0+flush-8:0	11:22:50	1
3525612	99	37	32,4	cyclictest	3761300	-21	kworker/u8:1+flush-8:0	11:12:39	0
3525612	99	37	32,3	cyclictest	1	-21	systemd	12:30:00	0
3525612	99	37	29,6	cyclictest	275	-21	systemd-journal	07:32:49	0
3525612	99	37	28,7	cyclictest	3533061	-21	apt-get	07:17:30	0
3525612	99	37	26,9	cyclictest	275	-21	systemd-journal	10:55:00	0
3525612	99	37	2,29	cyclictest	3731498	-21	kworker/0:0+events	10:45:01	0
3525612	99	37	0,31	cyclictest	3731498	-21	kworker/0:0+events	10:45:02	0
3525617	99	36	31,4	cyclictest	3542603	-21	kworker/u8:2+flush-8:0	07:32:35	2
3525615	99	36	32,3	cyclictest	3726473	-21	kworker/u8:0+flush-8:0	10:47:45	1
3525615	99	36	32,3	cyclictest	3607343	-21	kworker/u8:0+flush-8:0	08:37:38	1
3525615	99	36	30,4	cyclictest	3840209	-21	kworker/u8:3+flush-8:0	12:22:50	1
3525615	99	36	30,4	cyclictest	3696041	-21	kworker/u8:3+flush-8:0	11:27:37	1
3525612	99	36	2,30	cyclictest	3557196	-21	kworker/0:2+events	10:25:34	0
3525612	99	36	2,28	cyclictest	3557196	-21	kworker/0:2+events	10:07:30	0
3525612	99	36	0,34	cyclictest	3826121	-21	true	12:10:00	0
3525617	99	35	28,5	cyclictest	3736477	-21	cron	10:40:00	2
3525615	99	35	30,4	cyclictest	3586973	-21	kworker/u8:2+events_unbound	08:47:36	1
3525615	99	35	29,5	cyclictest	3637189	-21	kworker/u8:2+events_unbound	10:02:33	1
3525615	99	35	29,5	cyclictest	3586973	-21	kworker/u8:2+flush-8:0	08:12:44	1
3525615	99	35	29,5	cyclictest	3586973	-21	kworker/u8:2+flush-8:0	08:12:44	1
3525615	99	35	29,5	cyclictest	3542603	-21	kworker/u8:2+flush-8:0	07:47:34	1
3525612	99	35	30,3	cyclictest	3805973	-21	kworker/u8:0+flush-8:0	12:02:47	0
3525612	99	35	28,5	cyclictest	275	-21	systemd-journal	08:42:45	0
3525615	99	34	30,3	cyclictest	3726473	-21	kworker/u8:0+events_unbound	10:30:02	1
3525615	99	34	30,3	cyclictest	3637189	-21	kworker/u8:2+events_unbound	10:42:47	1
3525615	99	34	29,3	cyclictest	3488834	-21	kworker/u8:1+flush-8:0	08:02:35	1
3525612	99	34	9,22	cyclictest	3557196	-21	kworker/0:2+events	08:01:14	0
3525612	99	34	30,2	cyclictest	3711547	-21	latency_hist	10:15:01	0
3525612	99	34	2,27	cyclictest	3731498	-21	kworker/0:0+events	11:50:29	0
3525612	99	34	1,28	cyclictest	3831035	-21	kworker/0:2+events	12:36:34	0
3525612	99	34	1,27	cyclictest	3557196	-21	kworker/0:2+events	08:30:16	0
3525617	99	33	28,4	cyclictest	3488834	-21	kworker/u8:1+flush-8:0	08:02:48	2
3525615	99	33	28,3	cyclictest	3542603	-21	kworker/u8:2+flush-8:0	07:37:37	1
3525615	99	33	27,3	cyclictest	3607343	-21	kworker/u8:0+events_unbound	08:32:41	1
3525612	99	33	8,20	cyclictest	3557196	-21	kworker/0:2+events	09:41:14	0
3746664	2	32	0,3	sleep3	575	-21	kworker/3:2-mm_percpu_wq	10:50:00	3
3525615	99	32	28,3	cyclictest	3761300	-21	kworker/u8:1+events_unbound	11:12:37	1
3525615	99	32	28,3	cyclictest	3696041	-21	kworker/u8:3+events_unbound	11:35:37	1
3525615	99	32	26,5	cyclictest	3542603	-21	kworker/u8:2+flush-8:0	07:32:33	1
3525612	99	32	3,27	cyclictest	3731498	-21	kworker/0:0+events	11:47:30	0
3525612	99	32	3,24	cyclictest	3557196	-21	kworker/0:2+events	10:17:28	0
3525612	99	32	28,2	cyclictest	3791221	-21	idleruntime-cro	11:35:00	0
3525612	99	32	23,6	cyclictest	3701451	-21	latency_hist	10:05:01	0
3525612	99	32	2,28	cyclictest	3557196	-21	kworker/0:2+events	10:22:40	0
3525612	99	32	19,10	cyclictest	275	-21	systemd-journal	09:25:00	0
3525612	99	32	1,30	cyclictest	3557196	-21	kworker/0:2+events	09:25:54	0
3525612	99	32	1,29	cyclictest	3731498	-21	kworker/0:0+events	10:39:34	0
3525615	99	31	27,3	cyclictest	3520578	-21	kworker/u8:0+events_unbound	07:22:35	1
3525615	99	31	26,3	cyclictest	3676727	-21	kworker/u8:1+events_unbound	09:42:30	1
3525615	99	31	25,5	cyclictest	3786477	-21	kworker/u8:2+flush-8:0	11:47:37	1
3525615	99	31	25,4	cyclictest	3696041	-21	kworker/u8:3+flush-8:0	10:12:36	1
3525615	99	31	24,5	cyclictest	3786477	-21	kworker/u8:2+events_unbound	11:42:46	1
3525615	99	31	23,6	cyclictest	3676473	-21	latency_hist	09:40:01	1
3525615	99	31	22,7	cyclictest	3637716	-21	fschecks_time	09:02:34	1
3525612	99	31	8,19	cyclictest	3557196	-21	kworker/0:2+events	09:32:00	0
3525612	99	31	6,20	cyclictest	3731498	-21	kworker/0:0+events	12:10:48	0
3525612	99	31	6,20	cyclictest	3557196	-21	kworker/0:2+events	07:56:45	0
3525612	99	31	3,26	cyclictest	3557196	-21	kworker/0:2+events	08:50:00	0
3525612	99	31	26,3	cyclictest	3781988	-21	cut	11:27:34	0
3525612	99	31	23,6	cyclictest	3525447	-21	latency_hist	07:10:01	0
3525612	99	31	2,23	cyclictest	3557196	-21	kworker/0:2+events	09:51:12	0
3525612	99	31	1,28	cyclictest	3831035	-21	kworker/0:2+events	12:32:45	0
3525612	99	31	1,25	cyclictest	3731498	-21	kworker/0:0+events	11:00:14	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17