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 30, 2026 12:44:16)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3381928	2	329	0,2	sleep3	48	1	ktimers/3	10:05:01	3
3297008	2	85	0,1	chrt	3297009	-21	/usr/sbin/munin	08:35:55	2
3229151	2	68	0,6	sleep2	0	-21	swapper/2	07:30:47	2
3246581	2	65	0,6	sleep2	0	-21	swapper/2	07:45:48	2
3205975	99	57	46,9	cyclictest	1704890	-21	systemd-journal	08:15:01	1
3205977	99	56	51,4	cyclictest	3342188	-21	kworker/u8:1+flush-8:0	09:35:56	2
3431731	2	54	0,2	chrt	37	1	rcuc/2	10:55:00	2
3431731	2	54	0,2	chrt	37	1	rcuc/2	10:55:00	2
3205975	99	53	48,3	cyclictest	3242685	-21	kworker/u8:2+events_unbound	08:35:55	1
3205977	99	52	48,3	cyclictest	3375962	-21	kworker/u8:2+flush-8:0	09:55:56	2
3205975	99	51	45,5	cyclictest	3221805	-21	kworker/u8:1+flush-8:0	07:30:57	1
3205975	99	50	44,4	cyclictest	3242685	-21	kworker/u8:2+events_unbound	08:05:58	1
3205975	99	50	40,8	cyclictest	3273222	-21	/usr/sbin/munin	08:15:55	1
3205975	99	49	44,3	cyclictest	3221805	-21	kworker/u8:1+flush-8:0	08:00:55	1
3205975	99	48	43,3	cyclictest	3242685	-21	kworker/u8:2+events_unbound	09:25:58	1
3205970	99	48	37,9	cyclictest	3460742	-21	ntpq	11:20:49	0
3205977	99	47	43,3	cyclictest	3351990	-21	kworker/u8:0+flush-8:0	09:45:55	2
3205975	99	46	41,4	cyclictest	3466593	-21	kworker/u8:2+flush-8:0	12:25:54	1
3205975	99	46	40,5	cyclictest	3437136	-21	kworker/u8:1+flush-8:0	11:45:56	1
3205975	99	46	39,4	cyclictest	1704890	-21	systemd-journal	11:15:58	1
3205975	99	46	38,6	cyclictest	3242685	-21	kworker/u8:2+flush-8:0	07:45:52	1
3205975	99	45	39,4	cyclictest	3466593	-21	kworker/u8:2+flush-8:0	11:40:42	1
3205975	99	45	39,4	cyclictest	3242685	-21	kworker/u8:2+events_unbound	09:05:51	1
3205975	99	45	37,6	cyclictest	3252797	-21	cp	07:55:00	1
3205975	99	45	37,6	cyclictest	3252797	-21	cp	07:54:59	1
3205970	99	45	37,7	cyclictest	3375962	-21	kworker/u8:2+events_unbound	10:15:01	0
3231279	2	44	0,4	chrt	0	-21	swapper/0	07:30:49	0
3205977	99	44	40,3	cyclictest	3530875	-21	kworker/u8:3+flush-8:0	12:36:00	2
3205977	99	44	39,4	cyclictest	3221805	-21	kworker/u8:1+events_unbound	07:35:50	2
3205975	99	44	39,3	cyclictest	3351990	-21	kworker/u8:0+events_unbound	10:15:58	1
3205975	99	44	38,5	cyclictest	2370656	-21	kworker/u8:4+flush-8:0	07:25:57	1
3205975	99	44	36,6	cyclictest	3425907	-21	ntpq	10:45:52	1
3205970	99	44	37,5	cyclictest	3501792	-21	diskstats	12:05:40	0
3205975	99	43	39,3	cyclictest	3466593	-21	kworker/u8:2+events_unbound	11:50:39	1
3205975	99	43	38,3	cyclictest	3317490	-21	kworker/u8:3+events_unbound	09:30:58	1
3205975	99	43	37,5	cyclictest	3342188	-21	kworker/u8:1+events_unbound	09:35:41	1
3205977	99	42	38,3	cyclictest	3437136	-21	kworker/u8:1+events_unbound	11:15:00	2
3205975	99	42	38,3	cyclictest	3426429	-21	kworker/u8:3+flush-8:0	10:50:52	1
3205975	99	42	38,3	cyclictest	3426429	-21	kworker/u8:3+flush-8:0	10:50:51	1
3205970	99	42	32,8	cyclictest	1704890	-21	systemd-journal	12:24:59	0
3205975	99	41	35,4	cyclictest	2370656	-21	kworker/u8:4+flush-8:0	07:15:59	1
3205975	99	41	33,6	cyclictest	3414905	-21	kworker/u8:2+events_unbound	10:35:50	1
3205497	2	41	2,32	sleep1	583	-21	snmpd	07:06:06	1
3205975	99	40	36,3	cyclictest	3437136	-21	kworker/u8:1+events_unbound	11:10:46	1
3205975	99	40	36,3	cyclictest	3190847	-21	kworker/u8:0+events_unbound	08:20:41	1
3205975	99	40	36,3	cyclictest	2369189	-21	kworker/u8:3+events_unbound	07:10:59	1
3205975	99	40	34,4	cyclictest	3466593	-21	kworker/u8:2+events_unbound	11:35:56	1
3205975	99	40	34,4	cyclictest	3190847	-21	kworker/u8:0+events_unbound	08:30:45	1
3205975	99	40	33,5	cyclictest	3437136	-21	kworker/u8:1+flush-8:0	11:20:56	1
3205975	99	40	31,7	cyclictest	3367177	-21	/usr/sbin/munin	09:50:52	1
3205970	99	40	30,8	cyclictest	3445904	-21	ntpq	11:05:49	0
3205975	99	39	33,5	cyclictest	3466593	-21	kworker/u8:2+events_unbound	12:10:53	1
3205975	99	39	33,4	cyclictest	3351990	-21	kworker/u8:0+events_unbound	12:05:53	1
3205975	99	39	33,4	cyclictest	3242685	-21	kworker/u8:2+flush-8:0	08:55:44	1
3205970	99	39	33,4	cyclictest	1704890	-21	systemd-journal	09:36:15	0
3205970	99	39	29,8	cyclictest	1704890	-21	systemd-journal	11:59:59	0
3205977	99	38	34,3	cyclictest	2370656	-21	kworker/u8:4+events_unbound	07:16:02	2
3205975	99	38	32,4	cyclictest	3190847	-21	kworker/u8:0+events_unbound	09:00:39	1
3205970	99	38	32,4	cyclictest	3414905	-21	kworker/u8:2+events_unbound	10:45:47	0
3205975	99	37	30,5	cyclictest	3466593	-21	kworker/u8:2+flush-8:0	11:30:51	1
3205975	99	37	30,5	cyclictest	3351990	-21	kworker/u8:0+flush-8:0	11:25:51	1
3205975	99	37	30,5	cyclictest	3190847	-21	kworker/u8:0+flush-8:0	08:40:56	1
3205975	99	37	29,6	cyclictest	3531123	-21	/usr/sbin/munin	12:35:49	1
3205975	99	37	28,6	cyclictest	3307852	-21	/usr/sbin/munin	08:50:51	1
3205970	99	37	30,5	cyclictest	1704890	-21	systemd-journal	09:51:16	0
3205977	99	36	32,3	cyclictest	3351990	-21	kworker/u8:0+events_unbound	10:35:58	2
3205975	99	36	30,4	cyclictest	3437136	-21	kworker/u8:1+events_unbound	12:00:41	1
3205977	99	35	31,3	cyclictest	3366615	-21	kworker/u8:3+flush-8:0	09:51:02	2
3205977	99	35	31,3	cyclictest	3351990	-21	kworker/u8:0+flush-8:0	10:11:13	2
3205975	99	35	30,4	cyclictest	3437136	-21	kworker/u8:1+events_unbound	11:05:56	1
3205975	99	35	30,4	cyclictest	3351990	-21	kworker/u8:0+events_unbound	12:20:44	1
3205975	99	35	29,4	cyclictest	3437136	-21	kworker/u8:1+flush-8:0	11:55:53	1
3205975	99	35	28,5	cyclictest	3242685	-21	kworker/u8:2+flush-8:0	09:15:54	1
3205975	99	35	28,5	cyclictest	3242685	-21	kworker/u8:2+flush-8:0	09:15:53	1
3205975	99	35	28,5	cyclictest	3242685	-21	kworker/u8:2+flush-8:0	08:45:57	1
3205975	99	35	28,5	cyclictest	3221805	-21	kworker/u8:1+flush-8:0	07:20:54	1
3205970	99	35	28,5	cyclictest	3436873	-21	cron	11:00:00	0
3205977	99	34	30,3	cyclictest	3242685	-21	kworker/u8:2+events_unbound	09:21:01	2
3205975	99	34	29,4	cyclictest	3342188	-21	kworker/u8:1+events_unbound	10:25:50	1
3205975	99	34	29,3	cyclictest	3516074	-21	systemd-run	12:20:00	1
3205975	99	34	29,3	cyclictest	3516074	-21	systemd-run	12:19:59	1
3205975	99	34	29,3	cyclictest	3411136	-21	ntpq	10:30:54	1
3205975	99	34	28,4	cyclictest	3466593	-21	kworker/u8:2+events_unbound	12:30:51	1
3205975	99	34	28,3	cyclictest	3351990	-21	kworker/u8:0+events_unbound	11:00:46	1
3205975	99	34	27,5	cyclictest	3342188	-21	kworker/u8:1+flush-8:0	10:40:58	1
3205970	99	34	29,3	cyclictest	3218756	-21	irqrtprio	07:20:45	0
3205565	2	34	4,10	sleep2	0	-21	swapper/2	07:07:00	2
3205975	99	33	29,3	cyclictest	3375962	-21	kworker/u8:2+events_unbound	09:56:00	1
3205975	99	33	28,3	cyclictest	3375962	-21	kworker/u8:2+events_unbound	10:10:42	1
3205970	99	33	24,6	cyclictest	1704890	-21	systemd-journal	10:20:01	0
3205977	99	32	27,3	cyclictest	3437136	-21	kworker/u8:1+events_unbound	11:15:03	2
3205975	99	32	28,3	cyclictest	3242685	-21	kworker/u8:2+events_unbound	09:10:45	1
3205975	99	32	28,3	cyclictest	3190847	-21	kworker/u8:0+events_unbound	08:26:00	1
3205975	99	32	26,4	cyclictest	3414905	-21	kworker/u8:2+events_unbound	10:55:53	1
3205975	99	32	20,5	cyclictest	3375962	-21	kworker/u8:2+flush-8:0	10:00:43	1
3205977	99	31	27,3	cyclictest	3242685	-21	kworker/u8:2+events_unbound	09:18:05	2
3205977	99	31	27,3	cyclictest	3242685	-21	kworker/u8:2+events_unbound	09:18:05	2
3205975	99	31	25,4	cyclictest	3342188	-21	kworker/u8:1+flush-8:0	09:40:44	1
3205970	99	31	25,4	cyclictest	3351990	-21	kworker/u8:0+events_unbound	11:35:01	0
3205970	99	31	23,6	cyclictest	3233157	-21	diskstats	07:35:41	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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