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 Jun 20, 2026 12:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3251909	2	202	0,2	sleep3	45	1	irq_work/3	10:05:41	3
3293046	2	194	0,3	sleep3	75	-21	kworker/3:1+events	10:50:29	3
3070847	99	75	63,9	cyclictest	3074769	-21	ntpq	07:10:34	0
3070847	99	70	57,10	cyclictest	3292120	-21	kworker/u8:2+flush-8:0	11:50:30	0
3157813	2	69	0,6	sleep3	0	-21	swapper/3	08:35:25	3
3070852	99	65	54,8	cyclictest	3251362	-21	ntpq	10:05:34	1
3070852	99	65	54,8	cyclictest	3241480	-21	ntpq	09:55:34	1
3070852	99	64	57,5	cyclictest	3281971	-21	latency_hist	10:40:00	1
3070847	99	62	54,5	cyclictest	3182487	-21	apt-get	09:00:21	0
3070847	99	61	51,7	cyclictest	3306992	-21	apt-get	11:05:00	0
3070852	99	60	48,8	cyclictest	3306984	-21	latency_hist	11:05:01	1
3070852	99	60	46,10	cyclictest	1704890	-21	systemd-journal	08:30:25	1
3070852	99	60	46,10	cyclictest	1704890	-21	systemd-journal	08:30:25	1
3070847	99	60	51,6	cyclictest	3345961	-21	kworker/u8:0+flush-8:0	12:15:36	0
3070847	99	59	51,6	cyclictest	3051140	-21	kworker/u8:3+flush-8:0	07:55:35	0
3070847	99	59	49,8	cyclictest	3400506	-21	ntpq	12:35:33	0
3070856	99	58	52,4	cyclictest	3301899	-21	gpgv	11:00:00	2
3070847	99	58	49,7	cyclictest	3326153	-21	ntpq	11:20:32	0
3070847	99	58	47,8	cyclictest	3212408	-21	latency_hist	09:30:01	0
3070847	99	55	48,5	cyclictest	3112654	-21	kworker/u8:0+flush-8:0	08:15:27	0
3070847	99	55	48,5	cyclictest	3112654	-21	kworker/u8:0+flush-8:0	08:15:27	0
3070847	99	55	43,9	cyclictest	3327566	-21	diskstats	11:25:25	0
3070847	99	54	44,7	cyclictest	3147055	-21	latency_hist	08:25:00	0
3070847	99	53	45,6	cyclictest	3242409	-21	latency_hist	10:00:01	0
3070847	99	53	42,9	cyclictest	3246502	-21	ntpq	10:00:34	0
3070852	99	52	41,9	cyclictest	3091647	-21	ntpq	07:25:33	1
3070847	99	52	46,4	cyclictest	3267165	-21	kworker/u8:0+events_unbound	10:45:27	0
3070847	99	52	46,4	cyclictest	3087849	-21	kworker/u8:0+flush-8:0	07:30:36	0
3070847	99	52	44,5	cyclictest	3197329	-21	latency_hist	09:15:02	0
3070847	99	52	41,8	cyclictest	3362191	-21	diskstats	12:00:25	0
3070852	99	51	44,5	cyclictest	3296836	-21	latency_hist	10:55:00	1
3070852	99	51	41,8	cyclictest	3276218	-21	ntpq	10:30:38	1
3070847	99	50	43,5	cyclictest	3301442	-21	kworker/u8:1+events_unbound	11:40:39	0
3070847	99	50	41,6	cyclictest	3281044	-21	ntpq	10:35:33	0
3070852	99	49	41,5	cyclictest	3102496	-21	latency_hist	07:40:01	1
3070856	99	48	44,3	cyclictest	3172113	-21	apt-get	08:50:01	2
3070852	99	48	42,4	cyclictest	3112654	-21	kworker/u8:0+flush-8:0	09:10:36	1
3070847	99	48	41,5	cyclictest	3271167	-21	ntpq	10:25:35	0
3070856	99	47	40,5	cyclictest	3212814	-21	base64	09:30:02	2
3070856	99	45	40,4	cyclictest	3096909	-21	kworker/u8:1+flush-8:0	07:40:40	2
3070852	99	45	36,7	cyclictest	3117659	-21	apt-get	07:55:20	1
3070847	99	45	36,6	cyclictest	3351762	-21	latency_hist	11:50:01	0
3070852	99	44	37,5	cyclictest	3287219	-21	apt-get	10:45:20	1
3070852	99	44	33,8	cyclictest	1704890	-21	systemd-journal	09:45:24	1
3070847	99	44	37,5	cyclictest	3187168	-21	kworker/u8:2+flush-8:0	09:35:43	0
3070847	99	44	36,6	cyclictest	3166266	-21	ntpq	08:40:36	0
3070847	99	44	35,6	cyclictest	3376467	-21	latency_hist	12:15:00	0
3070847	99	43	38,4	cyclictest	3051140	-21	kworker/u8:3+events_unbound	08:10:40	0
3070847	99	43	38,4	cyclictest	3051140	-21	kworker/u8:3+events_unbound	08:10:39	0
3070847	99	43	37,5	cyclictest	3221711	-21	kworker/u8:0+flush-8:0	09:40:36	0
3070847	99	43	35,6	cyclictest	3078280	-21	kworker/u8:4+flush-8:0	08:05:43	0
3070847	99	43	34,7	cyclictest	3312444	-21	/usr/sbin/munin	11:10:39	0
3065822	2	43	4,34	sleep1	0	-21	swapper/1	07:05:02	1
3070847	99	42	38,3	cyclictest	3187168	-21	kworker/u8:2+events_unbound	09:30:41	0
3070847	99	42	32,8	cyclictest	1704890	-21	systemd-journal	07:25:00	0
3070856	99	41	36,4	cyclictest	3078280	-21	kworker/u8:4+flush-8:0	07:20:31	2
3070852	99	41	32,6	cyclictest	3082638	-21	latency_hist	07:20:01	1
3070847	99	41	36,3	cyclictest	3112654	-21	kworker/u8:0+events_unbound	08:50:02	0
3070847	99	41	35,4	cyclictest	3078280	-21	kworker/u8:4+flush-8:0	07:50:37	0
3070852	99	40	29,9	cyclictest	3106601	-21	ntpq	07:40:36	1
3070847	99	40	36,3	cyclictest	3345961	-21	kworker/u8:0+events_unbound	12:20:39	0
3070847	99	40	34,4	cyclictest	3096909	-21	kworker/u8:1+flush-8:0	07:35:25	0
3070856	99	39	31,6	cyclictest	3152035	-21	apt-get	08:30:00	2
3070852	99	39	30,7	cyclictest	3345961	-21	kworker/u8:0+flush-8:0	12:20:31	1
3070847	99	39	34,3	cyclictest	3051140	-21	kworker/u8:3+flush-8:0	08:25:38	0
3070847	99	39	33,4	cyclictest	3096909	-21	kworker/u8:1+events_unbound	07:45:41	0
3070847	99	39	29,7	cyclictest	3371516	-21	latency_hist	12:10:01	0
3070852	99	38	31,5	cyclictest	3237677	-21	kworker/u8:1+flush-8:0	10:40:42	1
3070852	99	38	30,6	cyclictest	3297085	-21	/usr/sbin/munin	10:55:39	1
3070852	99	38	30,5	cyclictest	1704890	-21	systemd-journal	08:25:25	1
3070852	99	38	26,8	cyclictest	1704890	-21	systemd-journal	11:27:25	1
3070847	99	38	34,3	cyclictest	3301442	-21	kworker/u8:1+events_unbound	11:35:37	0
3070847	99	38	34,3	cyclictest	3187168	-21	kworker/u8:2+events_unbound	09:20:38	0
3070847	99	38	32,4	cyclictest	3051140	-21	kworker/u8:3+events_unbound	08:00:26	0
3070847	99	38	31,5	cyclictest	3207679	-21	kworker/u8:3+events_unbound	10:20:41	0
3070847	99	38	30,6	cyclictest	3322076	-21	latency_hist	11:20:01	0
3070847	99	38	29,6	cyclictest	3232490	-21	latency_hist	09:50:02	0
3070852	99	37	32,3	cyclictest	3342141	-21	apt-get	11:40:20	1
3070852	99	37	28,7	cyclictest	3132479	-21	apt-get	08:10:21	1
3070852	99	37	28,7	cyclictest	3132479	-21	apt-get	08:10:20	1
3070847	99	37	33,3	cyclictest	3207679	-21	kworker/u8:3+flush-8:0	10:30:25	0
3070847	99	37	32,4	cyclictest	3051140	-21	kworker/u8:3+events_unbound	07:15:35	0
3070847	99	37	31,4	cyclictest	3147282	-21	kworker/u8:1+events_unbound	08:30:26	0
3070847	99	37	31,4	cyclictest	3147282	-21	kworker/u8:1+events_unbound	08:30:25	0
3070847	99	37	30,5	cyclictest	3147282	-21	kworker/u8:1+flush-8:0	08:45:37	0
3070847	99	37	29,6	cyclictest	3391751	-21	/usr/sbin/munin	12:30:31	0
3070847	99	37	27,7	cyclictest	3361650	-21	latency_hist	12:00:01	0
3066083	2	37	3,6	sleep2	0	-21	swapper/2	07:05:23	2
3070852	99	36	26,7	cyclictest	3147282	-21	kworker/u8:1+flush-8:0	09:00:36	1
3070847	99	36	32,2	cyclictest	3292120	-21	kworker/u8:2+events_unbound	11:05:24	0
3070847	99	36	30,4	cyclictest	3345961	-21	kworker/u8:0+events_unbound	12:25:33	0
3070847	99	36	30,4	cyclictest	3112654	-21	kworker/u8:0+events_unbound	08:35:38	0
3070847	99	36	29,5	cyclictest	3237448	-21	latency_hist	09:55:02	0
3070847	99	36	1,32	cyclictest	3192190	-21	munin-run	09:10:00	0
3070856	99	35	30,4	cyclictest	3112654	-21	kworker/u8:0+flush-8:0	08:20:25	2
3070847	99	35	31,3	cyclictest	3312215	-21	kworker/u8:3+events_unbound	11:30:37	0
3070847	99	35	30,3	cyclictest	3112654	-21	kworker/u8:0+events_unbound	08:55:24	0
3070856	99	34	27,5	cyclictest	3292120	-21	kworker/u8:2+events_unbound	10:50:21	2
3070852	99	34	27,5	cyclictest	1704890	-21	systemd-journal	10:29:25	1
3070852	99	34	27,5	cyclictest	1704890	-21	systemd-journal	08:43:25	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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