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 Mon May 25, 2026 12:44:13)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
239941	2	71	0,2	sleep3	47	1	rcuc/3	07:45:46	3
202631	99	70	58,9	cyclictest	1704890	-21	systemd-journal	12:00:01	1
202629	99	66	59,5	cyclictest	187803	-21	kworker/u8:1+flush-8:0	09:30:58	0
202635	99	63	59,3	cyclictest	377299	-21	kworker/u8:2+flush-8:0	10:01:01	2
352069	2	61	0,1	sleep1	352072	-21	kthreadcore	09:35:50	1
202629	99	59	55,3	cyclictest	3559123	-21	kworker/u8:2+flush-8:0	07:15:05	0
202631	99	57	50,5	cyclictest	239073	-21	apt-get	07:41:37	1
202631	99	57	45,9	cyclictest	407818	-21	apt-get	10:35:01	1
202629	99	57	48,7	cyclictest	392021	-21	ntpq	10:15:54	0
202629	99	56	49,5	cyclictest	478310	-21	kworker/u8:0+flush-8:0	12:15:53	0
202635	99	55	49,4	cyclictest	407851	-21	kworker/u8:1+flush-8:0	11:45:58	2
202629	99	54	46,6	cyclictest	1704890	-21	systemd-journal	12:40:00	0
202635	99	52	48,3	cyclictest	392608	-21	kworker/u8:0+flush-8:0	10:26:01	2
202635	99	52	46,4	cyclictest	398149	-21	kworker/u8:3+flush-8:0	11:10:48	2
202631	99	52	25,18	cyclictest	264100	-21	sh	08:09:59	1
202629	99	52	45,5	cyclictest	398149	-21	kworker/u8:3+flush-8:0	11:10:55	0
202629	99	52	41,8	cyclictest	248394	-21	ntpq	07:50:55	0
202635	99	51	47,3	cyclictest	478310	-21	kworker/u8:0+flush-8:0	12:15:59	2
202635	99	51	47,3	cyclictest	377299	-21	kworker/u8:2+events_unbound	10:30:54	2
202635	99	51	46,4	cyclictest	187803	-21	kworker/u8:1+flush-8:0	10:16:00	2
202629	99	51	45,4	cyclictest	249535	-21	kworker/u8:0+flush-8:0	08:05:59	0
202629	99	51	39,10	cyclictest	518411	-21	diskstats	12:25:46	0
202635	99	50	45,4	cyclictest	328289	-21	kworker/u8:0+flush-8:0	09:45:56	2
202635	99	50	45,4	cyclictest	209703	-21	kworker/u8:3+events_unbound	07:20:59	2
202629	99	50	43,5	cyclictest	323305	-21	sed	09:06:02	0
202635	99	49	45,3	cyclictest	303661	-21	kworker/u8:2+flush-8:0	09:05:54	2
202629	99	49	43,4	cyclictest	462400	-21	kworker/u8:2+flush-8:0	12:10:56	0
202635	99	48	45,2	cyclictest	427510	-21	kworker/u8:0+events_unbound	11:25:50	2
202635	99	48	44,3	cyclictest	398149	-21	kworker/u8:3+flush-8:0	10:36:02	2
202631	99	48	25,12	cyclictest	433855	-21	apt-get	11:00:40	1
202629	99	48	42,4	cyclictest	462400	-21	kworker/u8:2+flush-8:0	11:30:50	0
202629	99	48	42,4	cyclictest	377299	-21	kworker/u8:2+flush-8:0	10:40:57	0
202631	99	47	37,7	cyclictest	372383	-21	ntpq	09:56:00	1
202629	99	47	40,4	cyclictest	521015	-21	kworker/u8:3+events_unbound	12:35:00	0
202635	99	46	41,4	cyclictest	187803	-21	kworker/u8:1+events_unbound	08:10:55	2
202635	99	45	38,5	cyclictest	427510	-21	kworker/u8:0+events_unbound	11:05:58	2
202631	99	45	35,6	cyclictest	1704890	-21	systemd-journal	10:55:46	1
202631	99	45	32,10	cyclictest	1704890	-21	systemd-journal	08:10:48	1
202631	99	45	27,15	cyclictest	388300	-21	apt-get	10:15:41	1
202629	99	45	39,4	cyclictest	187803	-21	kworker/u8:1+flush-8:0	10:11:01	0
404109	2	44	0,3	sleep3	75	-21	kworker/3:1+events	10:30:49	3
202635	99	44	40,3	cyclictest	427510	-21	kworker/u8:0+events_unbound	10:51:01	2
202631	99	44	33,8	cyclictest	1704890	-21	systemd-journal	11:11:09	1
202629	99	44	40,3	cyclictest	427510	-21	kworker/u8:0+flush-8:0	10:55:57	0
202629	99	44	37,5	cyclictest	3559123	-21	kworker/u8:2+flush-8:0	07:30:55	0
202629	99	44	33,9	cyclictest	439067	-21	diskstats	11:05:46	0
202256	2	44	4,35	sleep0	0	-21	swapper/0	07:07:20	0
202635	99	43	39,3	cyclictest	462400	-21	kworker/u8:2+flush-8:0	11:36:01	2
202635	99	43	39,3	cyclictest	263386	-21	kworker/u8:3+flush-8:0	09:11:03	2
202635	99	43	39,3	cyclictest	187803	-21	kworker/u8:1+flush-8:0	07:50:54	2
202629	99	43	36,5	cyclictest	407851	-21	kworker/u8:1+flush-8:0	10:45:57	0
202629	99	43	35,6	cyclictest	478310	-21	kworker/u8:0+events_unbound	12:00:56	0
202629	99	43	35,6	cyclictest	462400	-21	kworker/u8:2+events_unbound	11:45:49	0
202629	99	43	33,8	cyclictest	223399	-21	ntpq	07:25:56	0
202635	99	42	38,3	cyclictest	187803	-21	kworker/u8:1+flush-8:0	09:55:47	2
202635	99	42	37,4	cyclictest	392608	-21	kworker/u8:0+flush-8:0	10:20:45	2
202635	99	42	36,5	cyclictest	187803	-21	kworker/u8:1+flush-8:0	08:41:00	2
202635	99	42	33,7	cyclictest	1704890	-21	systemd-journal	09:44:59	2
202631	99	42	33,6	cyclictest	1704890	-21	systemd-journal	11:53:48	1
202629	99	42	35,5	cyclictest	462400	-21	kworker/u8:2+flush-8:0	12:20:47	0
202629	99	42	33,7	cyclictest	263386	-21	kworker/u8:3+flush-8:0	08:20:56	0
202631	99	41	29,8	cyclictest	1704890	-21	systemd-journal	08:58:47	1
202631	99	41	15,16	cyclictest	0	-21	swapper/1	12:30:00	1
202629	99	41	36,3	cyclictest	328289	-21	kworker/u8:0+events_unbound	09:20:48	0
202629	99	41	35,5	cyclictest	407851	-21	kworker/u8:1+flush-8:0	11:00:56	0
202629	99	41	35,5	cyclictest	328289	-21	kworker/u8:0+flush-8:0	09:35:52	0
202629	99	41	35,4	cyclictest	3559123	-21	kworker/u8:2+events_unbound	07:20:54	0
202635	99	40	29,9	cyclictest	238473	-21	ntpq	07:40:55	2
202631	99	40	28,10	cyclictest	250299	-21	irqrtprio	07:55:51	1
202629	99	40	33,6	cyclictest	462400	-21	kworker/u8:2+flush-8:0	12:05:56	0
202631	99	39	29,7	cyclictest	1704890	-21	systemd-journal	10:10:46	1
202631	99	39	26,10	cyclictest	1704890	-21	systemd-journal	09:25:47	1
202629	99	39	34,4	cyclictest	407851	-21	kworker/u8:1+flush-8:0	11:16:00	0
202629	99	39	32,5	cyclictest	303661	-21	kworker/u8:2+events_unbound	08:55:57	0
202635	99	38	34,3	cyclictest	478310	-21	kworker/u8:0+events_unbound	12:00:01	2
202631	99	38	6,23	cyclictest	589	-21	runrttasks	09:10:20	1
202631	99	38	10,14	cyclictest	418728	-21	apt-get	10:45:42	1
202629	99	38	32,4	cyclictest	263386	-21	kworker/u8:3+events_unbound	08:45:44	0
202629	99	38	32,4	cyclictest	263386	-21	kworker/u8:3+events_unbound	08:45:43	0
202629	99	38	31,5	cyclictest	263386	-21	kworker/u8:3+flush-8:0	08:25:48	0
202635	99	37	33,3	cyclictest	478310	-21	kworker/u8:0+flush-8:0	12:10:46	2
202631	99	37	28,6	cyclictest	517475	-21	grep	12:21:02	1
202631	99	37	27,6	cyclictest	1704890	-21	systemd-journal	08:35:46	1
202631	99	37	25,10	cyclictest	443466	-21	cron	11:10:00	1
202631	99	37	1,24	cyclictest	244170	-21	taskset	07:48:19	1
202629	99	37	33,3	cyclictest	268414	-21	kworker/u8:0+flush-8:0	08:15:59	0
202629	99	37	32,4	cyclictest	187803	-21	kworker/u8:1+flush-8:0	08:40:45	0
202629	99	37	32,3	cyclictest	187803	-21	kworker/u8:1+events_unbound	09:41:00	0
202629	99	37	31,4	cyclictest	407851	-21	kworker/u8:1+events_unbound	10:50:49	0
202629	99	37	30,5	cyclictest	478310	-21	kworker/u8:0+flush-8:0	11:55:55	0
202629	99	37	29,6	cyclictest	473336	-21	latency_hist	11:40:01	0
202631	99	36	24,9	cyclictest	0	-21	swapper/1	10:35:59	1
202631	99	36	1,20	cyclictest	398167	-21	runrttasks	10:25:19	1
202631	99	36	1,19	cyclictest	523023	-21	runrttasks	12:30:03	1
202631	99	36	1,19	cyclictest	473341	-21	munin-run	11:40:00	1
202631	99	36	0,17	cyclictest	256922	-21	kthreadcore	08:00:49	1
202629	99	36	32,3	cyclictest	398149	-21	kworker/u8:3+events_unbound	11:20:53	0
202629	99	36	31,4	cyclictest	328289	-21	kworker/u8:0+events_unbound	09:15:49	0
202629	99	36	31,4	cyclictest	303661	-21	kworker/u8:2+events_unbound	09:10:49	0
202629	99	36	30,4	cyclictest	328289	-21	kworker/u8:0+flush-8:0	10:00:52	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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