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 Wed Sep 16, 2026 00:44:14)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
329761	2	196	0,2	sleep3	75	-21	kworker/3:1-events	19:19:07	3
518854	2	189	0,3	sleep3	75	-21	kworker/3:1+events	22:29:05	3
532693	2	187	0,2	sleep3	75	-21	kworker/3:1-events	22:40:01	3
457483	2	74	0,3	chrt	45	1	irq_work/3	21:24:18	3
321905	99	66	46,7	cyclictest	567337	-21	latency_hist	23:15:00	0
321905	99	60	50,8	cyclictest	428082	-21	cp	20:55:01	0
321908	99	58	51,5	cyclictest	398402	-21	kworker/u8:3+flush-8:0	22:09:20	1
321908	99	57	53,3	cyclictest	547777	-21	kworker/u8:2+events_unbound	22:59:17	1
321908	99	56	50,4	cyclictest	547777	-21	kworker/u8:2+flush-8:0	23:24:19	1
321910	99	54	48,4	cyclictest	637601	-21	gpgv	00:25:00	2
321910	99	54	48,4	cyclictest	637601	-21	gpgv	00:25:00	2
321908	99	53	47,4	cyclictest	378397	-21	kworker/u8:1+events_unbound	20:14:04	1
321908	99	52	46,5	cyclictest	502393	-21	kworker/u8:1+flush-8:0	22:14:14	1
321908	99	51	46,3	cyclictest	333865	-21	kworker/u8:0+events_unbound	19:34:06	1
321908	99	51	45,5	cyclictest	613022	-21	kworker/u8:4+flush-8:0	00:29:20	1
321908	99	50	46,3	cyclictest	344106	-21	kworker/u8:2+events_unbound	20:29:09	1
321908	99	50	43,5	cyclictest	398402	-21	kworker/u8:3+events_unbound	21:09:08	1
321905	99	50	40,7	cyclictest	507683	-21	latency_hist	22:15:01	0
321908	99	49	40,7	cyclictest	408095	-21	latency_hist	20:35:01	1
321905	99	49	39,8	cyclictest	651898	-21	ntpq	00:39:15	0
321908	99	48	44,3	cyclictest	567296	-21	kworker/u8:0+events_unbound	23:29:02	1
321908	99	48	43,4	cyclictest	4162117	-21	kworker/u8:1+events_unbound	19:29:08	1
321908	99	48	42,4	cyclictest	583206	-21	kworker/u8:1+flush-8:0	23:39:18	1
321908	99	48	40,6	cyclictest	617730	-21	latency_hist	00:05:01	1
321908	99	48	40,6	cyclictest	512638	-21	latency_hist	22:20:01	1
321905	99	48	39,6	cyclictest	388266	-21	latency_hist	20:15:01	0
321908	99	47	41,4	cyclictest	321772	-21	kworker/u8:3+flush-8:0	19:24:07	1
321908	99	47	40,5	cyclictest	398402	-21	kworker/u8:3+events_unbound	20:39:04	1
321908	99	46	42,3	cyclictest	398402	-21	kworker/u8:3+flush-8:0	21:29:20	1
321908	99	45	39,5	cyclictest	462861	-21	kworker/u8:2+flush-8:0	21:44:18	1
321905	99	45	38,5	cyclictest	344106	-21	kworker/u8:2+flush-8:0	20:49:06	0
585651	2	44	0,4	sleep0	585655	-21	kthreadcore	23:34:10	0
321905	99	44	36,5	cyclictest	612820	-21	cat	00:00:00	0
321908	99	43	39,3	cyclictest	462861	-21	kworker/u8:2+flush-8:0	22:04:07	1
321908	99	43	38,4	cyclictest	532717	-21	kworker/u8:1+events_unbound	23:14:04	1
321908	99	43	38,4	cyclictest	398402	-21	kworker/u8:3+flush-8:0	21:49:19	1
321908	99	43	38,4	cyclictest	333865	-21	kworker/u8:0+events_unbound	22:24:14	1
321908	99	43	38,3	cyclictest	423138	-21	kworker/u8:1+flush-8:0	21:04:18	1
321908	99	43	37,4	cyclictest	602992	-21	kworker/u8:1+flush-8:0	23:54:05	1
321908	99	43	30,10	cyclictest	278	-21	systemd-journal	22:33:25	1
321908	99	42	37,4	cyclictest	462861	-21	kworker/u8:2+flush-8:0	21:39:21	1
321908	99	42	36,5	cyclictest	532717	-21	kworker/u8:1+events_unbound	23:04:16	1
321908	99	42	36,4	cyclictest	344106	-21	kworker/u8:2+flush-8:0	19:39:17	1
321908	99	42	36,4	cyclictest	344106	-21	kworker/u8:2+flush-8:0	19:39:16	1
321905	99	42	32,8	cyclictest	398402	-21	kworker/u8:3+flush-8:0	20:39:06	0
321908	99	41	37,3	cyclictest	642611	-21	kworker/u8:0+events_unbound	00:34:03	1
321908	99	41	37,3	cyclictest	333865	-21	kworker/u8:0+events_unbound	20:09:07	1
321908	99	41	36,4	cyclictest	613022	-21	kworker/u8:4+flush-8:0	00:14:13	1
321908	99	41	36,4	cyclictest	344106	-21	kworker/u8:2+events_unbound	19:54:04	1
321908	99	41	36,4	cyclictest	333865	-21	kworker/u8:0+flush-8:0	22:49:04	1
321908	99	41	35,5	cyclictest	333865	-21	kworker/u8:0+flush-8:0	22:29:18	1
321908	99	41	35,4	cyclictest	333865	-21	kworker/u8:0+flush-8:0	22:44:18	1
321908	99	41	34,5	cyclictest	592553	-21	kworker/u8:3+flush-8:0	23:59:20	1
321908	99	41	32,7	cyclictest	322301	-21	/usr/sbin/munin	19:14:17	1
321908	99	41	30,9	cyclictest	637493	-21	apt-get	00:25:00	1
321908	99	41	30,9	cyclictest	637493	-21	apt-get	00:25:00	1
321908	99	40	36,3	cyclictest	547777	-21	kworker/u8:2+flush-8:0	23:09:06	1
321908	99	40	36,3	cyclictest	344106	-21	kworker/u8:2+flush-8:0	20:44:08	1
321908	99	40	36,3	cyclictest	344106	-21	kworker/u8:2+flush-8:0	20:44:08	1
321908	99	40	35,4	cyclictest	567296	-21	kworker/u8:0+events_unbound	23:40:02	1
321908	99	40	35,4	cyclictest	423138	-21	kworker/u8:1+flush-8:0	20:59:05	1
321908	99	40	34,5	cyclictest	547777	-21	kworker/u8:2+flush-8:0	23:19:15	1
321908	99	40	34,5	cyclictest	547777	-21	kworker/u8:2+events_unbound	00:19:05	1
321908	99	40	34,5	cyclictest	547777	-21	kworker/u8:2+events_unbound	00:19:05	1
321908	99	40	34,5	cyclictest	321772	-21	kworker/u8:3+flush-8:0	19:44:19	1
321908	99	40	34,4	cyclictest	321772	-21	kworker/u8:3+events_unbound	19:49:17	1
321910	99	39	34,3	cyclictest	321772	-21	kworker/u8:3+events_unbound	19:15:02	2
321908	99	39	33,4	cyclictest	567296	-21	kworker/u8:0+flush-8:0	23:34:09	1
321908	99	38	31,5	cyclictest	398402	-21	kworker/u8:3+flush-8:0	21:19:16	1
321908	99	38	30,6	cyclictest	547777	-21	kworker/u8:2+flush-8:0	23:49:12	1
321908	99	38	29,6	cyclictest	278	-21	systemd-journal	20:16:25	1
321905	99	38	29,6	cyclictest	278	-21	systemd-journal	21:05:00	0
321905	99	38	28,7	cyclictest	632544	-21	latency_hist	00:20:01	0
321905	99	38	28,7	cyclictest	632544	-21	latency_hist	00:20:00	0
577071	2	37	0,6	sleep3	45	1	irq_work/3	23:24:18	3
321908	99	37	32,3	cyclictest	512903	-21	kworker/u8:3+events_unbound	22:39:17	1
321908	99	37	31,5	cyclictest	333865	-21	kworker/u8:0+events_unbound	20:54:16	1
321905	99	37	27,8	cyclictest	597203	-21	ntpq	23:44:15	0
321905	99	37	2,29	cyclictest	321735	-21	kworker/0:2+events	20:05:37	0
321910	99	36	27,7	cyclictest	338774	-21	base64	19:25:00	2
321908	99	36	32,3	cyclictest	378397	-21	kworker/u8:1+events_unbound	20:24:08	1
321908	99	36	32,3	cyclictest	333865	-21	kworker/u8:0+events_unbound	20:49:11	1
321908	99	36	31,4	cyclictest	333865	-21	kworker/u8:0+flush-8:0	21:34:06	1
321908	99	36	31,4	cyclictest	333865	-21	kworker/u8:0+events_unbound	22:54:11	1
321908	99	36	30,4	cyclictest	642611	-21	kworker/u8:0+events_unbound	00:39:18	1
321908	99	36	29,6	cyclictest	398402	-21	kworker/u8:3+events_unbound	21:14:02	1
321905	99	35	1,32	cyclictest	492619	-21	kworker/0:0+events	22:39:01	0
317248	2	35	3,9	sleep1	0	-21	swapper/1	19:07:14	1
321910	99	34	24,8	cyclictest	448100	-21	awk	21:15:00	2
321908	99	34	29,3	cyclictest	398402	-21	kworker/u8:3+flush-8:0	21:54:10	1
321905	99	34	26,6	cyclictest	373431	-21	latency_hist	20:00:01	0
321905	99	34	11,14	cyclictest	567487	-21	kworker/0:0+events	23:24:01	0
321905	99	33	25,6	cyclictest	453848	-21	diskstats	21:24:04	0
321905	99	33	24,6	cyclictest	472777	-21	latency_hist	21:40:01	0
321905	99	33	2,25	cyclictest	537445	-21	kworker/0:1+events	22:55:01	0
321908	99	32	28,3	cyclictest	462861	-21	kworker/u8:2+events_unbound	21:59:09	1
321905	99	32	26,4	cyclictest	278	-21	systemd-journal	22:00:05	0
321905	99	32	24,6	cyclictest	278	-21	systemd-journal	19:50:00	0
321910	99	31	25,4	cyclictest	412325	-21	needreboot	20:39:12	2
321905	99	31	3,26	cyclictest	321735	-21	kworker/0:2+events	19:34:17	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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