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 May 23, 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
577994	99	70	62,6	cyclictest	718632	-21	kworker/u8:0+flush-8:0	09:36:01	1
577994	99	67	60,5	cyclictest	3930284	-21	kworker/u8:0+events_unbound	07:26:03	1
577994	99	65	58,6	cyclictest	664021	-21	kworker/u8:3+flush-8:0	09:41:03	1
577994	99	62	57,4	cyclictest	644263	-21	kworker/u8:1+events_unbound	08:45:01	1
577994	99	61	56,4	cyclictest	664021	-21	kworker/u8:3+flush-8:0	09:25:58	1
577992	99	61	54,5	cyclictest	3930284	-21	kworker/u8:0+events_unbound	07:41:13	0
577994	99	60	54,5	cyclictest	653350	-21	kworker/u8:0+flush-8:0	08:31:03	1
577994	99	60	54,4	cyclictest	853326	-21	kworker/u8:0+events_unbound	12:01:02	1
577994	99	59	52,5	cyclictest	629690	-21	kworker/u8:2+flush-8:0	09:20:58	1
577994	99	59	51,6	cyclictest	718632	-21	kworker/u8:0+flush-8:0	10:05:58	1
577994	99	58	50,6	cyclictest	588886	-21	ntpq	07:15:56	1
577994	99	58	48,8	cyclictest	762899	-21	ntpq	10:10:58	1
577994	99	57	52,3	cyclictest	684301	-21	kworker/u8:0+flush-8:0	09:06:02	1
577994	99	57	51,4	cyclictest	589488	-21	kworker/u8:3+events_unbound	08:11:02	1
577994	99	57	48,7	cyclictest	678251	-21	ntpq	08:45:57	1
577992	99	57	52,4	cyclictest	578107	-21	kworker/u8:2+flush-8:0	07:21:04	0
821387	2	56	0,8	sleep3	75	-21	kworker/3:1+mm_percpu_wq	11:10:54	3
577994	99	56	51,4	cyclictest	664021	-21	kworker/u8:3+events_unbound	10:41:05	1
577994	99	56	47,7	cyclictest	902154	-21	ntpq	12:30:56	1
577994	99	55	48,5	cyclictest	664021	-21	kworker/u8:3+flush-8:0	10:46:00	1
577994	99	55	46,7	cyclictest	822606	-21	ntpq	11:10:58	1
577992	99	55	44,8	cyclictest	788526	-21	latency_hist	10:40:01	0
577994	99	54	49,4	cyclictest	798691	-21	kworker/u8:0+events_unbound	10:55:58	1
577994	99	54	49,4	cyclictest	754119	-21	kworker/u8:2+events_unbound	11:00:46	1
577994	99	54	47,5	cyclictest	754119	-21	kworker/u8:2+flush-8:0	11:26:02	1
577994	99	54	45,6	cyclictest	723086	-21	ntpq	09:31:00	1
577994	99	53	47,4	cyclictest	624480	-21	kworker/u8:1+flush-8:0	07:56:02	1
577992	99	53	48,3	cyclictest	763770	-21	kworker/u8:1+flush-8:0	10:51:05	0
577994	99	52	47,3	cyclictest	833354	-21	kworker/u8:3+flush-8:0	12:15:49	1
577994	99	52	46,4	cyclictest	664021	-21	kworker/u8:3+events_unbound	09:10:45	1
577994	99	52	45,5	cyclictest	629690	-21	kworker/u8:2+flush-8:0	08:20:59	1
577994	99	52	45,5	cyclictest	629690	-21	kworker/u8:2+flush-8:0	08:20:59	1
577994	99	52	44,6	cyclictest	644263	-21	kworker/u8:1+flush-8:0	08:50:57	1
577992	99	52	47,4	cyclictest	754119	-21	kworker/u8:2+events_unbound	11:00:51	0
577994	99	51	47,3	cyclictest	842945	-21	kworker/u8:1+events_unbound	11:56:00	1
577994	99	51	45,4	cyclictest	578107	-21	kworker/u8:2+flush-8:0	07:35:57	1
577992	99	51	47,3	cyclictest	664021	-21	kworker/u8:3+events_unbound	10:40:47	0
577992	99	51	47,3	cyclictest	578107	-21	kworker/u8:2+events_unbound	07:15:05	0
577992	99	51	45,4	cyclictest	853326	-21	kworker/u8:0+flush-8:0	12:15:44	0
577992	99	51	45,4	cyclictest	3930284	-21	kworker/u8:0+flush-8:0	07:45:58	0
577998	99	50	44,4	cyclictest	664021	-21	kworker/u8:3+events_unbound	09:45:50	2
577994	99	50	45,4	cyclictest	833354	-21	kworker/u8:3+events_unbound	11:35:56	1
577994	99	50	44,5	cyclictest	3930284	-21	kworker/u8:0+flush-8:0	08:05:58	1
577994	99	50	39,8	cyclictest	892890	-21	apt-get	12:25:01	1
577994	99	50	39,4	cyclictest	664021	-21	kworker/u8:3+events_unbound	08:36:02	1
577992	99	50	42,6	cyclictest	3930284	-21	kworker/u8:0+flush-8:0	07:25:57	0
577994	99	49	44,4	cyclictest	763770	-21	kworker/u8:1+events_unbound	10:26:02	1
577994	99	49	44,4	cyclictest	754119	-21	kworker/u8:2+events_unbound	11:35:01	1
577994	99	49	43,5	cyclictest	853326	-21	kworker/u8:0+flush-8:0	11:50:59	1
577994	99	49	43,5	cyclictest	754119	-21	kworker/u8:2+flush-8:0	10:35:59	1
577994	99	49	43,4	cyclictest	3930284	-21	kworker/u8:0+flush-8:0	07:10:57	1
577994	99	49	42,5	cyclictest	629690	-21	kworker/u8:2+events_unbound	09:15:49	1
577992	99	49	43,4	cyclictest	664021	-21	kworker/u8:3+events_unbound	10:00:59	0
577998	99	48	43,3	cyclictest	763770	-21	kworker/u8:1+events_unbound	10:20:54	2
577998	99	48	38,7	cyclictest	1704890	-21	systemd-journal	09:59:39	2
577994	99	48	42,5	cyclictest	754119	-21	kworker/u8:2+flush-8:0	11:41:02	1
577994	99	48	42,5	cyclictest	664021	-21	kworker/u8:3+flush-8:0	10:01:00	1
577994	99	48	41,5	cyclictest	898328	-21	kworker/u8:1+flush-8:0	12:35:57	1
577994	99	47	42,4	cyclictest	578107	-21	kworker/u8:2+flush-8:0	07:20:59	1
577994	99	47	42,4	cyclictest	3930284	-21	kworker/u8:0+events_unbound	07:46:02	1
577994	99	47	37,8	cyclictest	832474	-21	ntpq	11:20:58	1
577994	99	47	37,8	cyclictest	832474	-21	ntpq	11:20:58	1
577992	99	47	41,4	cyclictest	833354	-21	kworker/u8:3+events_unbound	11:36:01	0
577992	99	47	41,4	cyclictest	763770	-21	kworker/u8:1+flush-8:0	10:20:49	0
577992	99	47	38,7	cyclictest	817660	-21	ntpq	11:05:57	0
577992	99	47	37,7	cyclictest	763754	-21	latency_hist	10:15:01	0
577994	99	46	41,4	cyclictest	763770	-21	kworker/u8:1+events_unbound	10:50:59	1
577994	99	46	41,4	cyclictest	754119	-21	kworker/u8:2+flush-8:0	10:15:59	1
577994	99	46	41,4	cyclictest	653350	-21	kworker/u8:0+flush-8:0	08:26:01	1
577994	99	46	41,4	cyclictest	653350	-21	kworker/u8:0+flush-8:0	08:26:00	1
577994	99	46	39,5	cyclictest	833354	-21	kworker/u8:3+flush-8:0	12:25:48	1
577994	99	46	38,6	cyclictest	857219	-21	ntpq	11:45:57	1
577994	99	46	38,5	cyclictest	1704890	-21	systemd-journal	07:53:38	1
577994	99	46	35,8	cyclictest	772909	-21	ntpq	10:21:02	1
577992	99	46	41,3	cyclictest	624480	-21	kworker/u8:1+events_unbound	07:55:47	0
577994	99	45	40,4	cyclictest	718632	-21	kworker/u8:0+events_unbound	09:55:57	1
577994	99	45	40,3	cyclictest	827558	-21	ntpq	11:16:12	1
577994	99	45	35,8	cyclictest	648293	-21	ntpq	08:15:57	1
577992	99	45	40,4	cyclictest	664021	-21	kworker/u8:3+flush-8:0	09:30:59	0
577992	99	45	39,4	cyclictest	589488	-21	kworker/u8:3+flush-8:0	08:11:03	0
577992	99	45	38,5	cyclictest	664021	-21	kworker/u8:3+events_unbound	10:46:00	0
577992	99	45	36,6	cyclictest	768696	-21	latency_hist	10:20:01	0
577992	99	45	35,8	cyclictest	743133	-21	ntpq	09:50:59	0
577994	99	44	39,4	cyclictest	3930284	-21	kworker/u8:0+events_unbound	07:30:48	1
577998	99	43	34,7	cyclictest	1704890	-21	systemd-journal	08:20:38	2
577998	99	43	34,7	cyclictest	1704890	-21	systemd-journal	08:20:38	2
577992	99	43	38,3	cyclictest	754119	-21	kworker/u8:2+flush-8:0	11:10:57	0
577992	99	43	36,5	cyclictest	853326	-21	kworker/u8:0+flush-8:0	12:05:59	0
577992	99	43	33,8	cyclictest	738772	-21	apt-get	09:50:00	0
577994	99	42	36,4	cyclictest	684301	-21	kworker/u8:0+flush-8:0	08:55:51	1
577992	99	42	37,4	cyclictest	754119	-21	kworker/u8:2+events_unbound	11:29:59	0
577992	99	42	34,6	cyclictest	853326	-21	kworker/u8:0+flush-8:0	12:20:58	0
577994	99	41	36,3	cyclictest	754119	-21	kworker/u8:2+events_unbound	11:05:52	1
577994	99	41	36,3	cyclictest	629690	-21	kworker/u8:2+events_unbound	08:00:53	1
577994	99	41	35,5	cyclictest	664021	-21	kworker/u8:3+flush-8:0	10:30:52	1
577994	99	41	31,8	cyclictest	878318	-21	/usr/sbin/munin	12:10:59	1
577992	99	41	37,3	cyclictest	853326	-21	kworker/u8:0+events_unbound	12:11:01	0
577992	99	41	35,4	cyclictest	629690	-21	kworker/u8:2+flush-8:0	09:15:58	0
577992	99	41	35,4	cyclictest	629690	-21	kworker/u8:2+flush-8:0	08:00:58	0
577998	99	40	35,4	cyclictest	853326	-21	kworker/u8:0+flush-8:0	12:11:03	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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