OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #7, slot #2

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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
Compare latency of primary with shadow system

Characteristics of the 792 highest latencies:

System rack7slot2.osadl.org (updated Thu Mar 05, 2026 12:44:08)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
352407	99	120	110,8	cyclictest	417116	-21	kworker/u4:1+events_unbound	10:40:17	1
352406	99	118	104,10	cyclictest	54	-21	kswapd0	10:45:08	0
352406	99	110	102,5	cyclictest	368960	-21	kworker/u4:6+events_unbound	09:10:42	0
352407	99	105	93,9	cyclictest	366421	-21	kworker/u4:2+events_unbound	09:00:39	1
352406	99	104	95,5	cyclictest	370229	-21	kworker/u4:7+events_unbound	10:05:50	0
352407	99	101	94,5	cyclictest	512029	-21	kworker/u4:0+events_unbound	12:16:08	1
352407	99	101	93,6	cyclictest	403609	-21	kworker/u4:2+events_unbound	09:35:46	1
352407	99	99	88,8	cyclictest	343465	-21	kworker/u4:5+events_unbound	07:45:19	1
352407	99	98	89,7	cyclictest	362584	-21	kworker/u4:1+events_unbound	08:50:39	1
352407	99	98	89,7	cyclictest	343465	-21	kworker/u4:5+events_unbound	07:55:29	1
352407	99	96	89,5	cyclictest	353632	-21	kworker/u4:4+events_unbound	07:35:15	1
352406	99	95	73,18	cyclictest	54	-21	kswapd0	10:10:07	0
352407	99	92	85,5	cyclictest	533290	-21	kworker/u4:15+events_unbound	12:06:07	1
352407	99	89	79,8	cyclictest	354907	-21	kworker/u4:13+events_unbound	07:40:17	1
352407	99	86	79,5	cyclictest	417118	-21	kworker/u4:4+events_unbound	09:50:48	1
352407	99	86	78,6	cyclictest	495164	-21	kworker/u4:14+events_unbound	11:21:04	1
352407	99	85	77,6	cyclictest	529514	-21	kworker/u4:14+events_unbound	12:21:08	1
352407	99	85	76,7	cyclictest	412644	-21	kworker/u4:11+events_unbound	10:20:52	1
352407	99	85	64,7	cyclictest	362584	-21	kworker/u4:1+events_unbound	09:00:02	1
352407	99	84	69,6	cyclictest	464546	-21	kworker/u4:8+events_unbound	10:55:01	1
352407	99	83	73,8	cyclictest	352367	-21	kworker/u4:1+events_unbound	07:30:10	1
352407	99	81	74,5	cyclictest	354908	-21	kworker/u4:14+events_unbound	08:20:33	1
352406	99	81	29,32	cyclictest	562745	-21	unixbench-2d	12:35:44	0
352406	99	81	29,29	cyclictest	0	-21	swapper/0	10:50:26	0
352406	99	75	66,6	cyclictest	354907	-21	kworker/u4:13+events_unbound	07:59:59	0
352407	99	74	66,6	cyclictest	486490	-21	kworker/u4:9+events_unbound	11:16:02	1
352407	99	74	65,3	cyclictest	374164	-21	kworker/u4:10+events_unbound	08:35:01	1
352407	99	72	65,5	cyclictest	403610	-21	kworker/u4:3+events_unbound	09:35:00	1
352407	99	72	58,6	cyclictest	408122	-21	kworker/u4:8+events_unbound	09:55:48	1
352406	99	72	42,27	cyclictest	463697	-21	wc	10:40:40	0
352406	99	72	29,40	cyclictest	488144	-21	munin-plugin-st	11:09:59	0
352407	99	70	58,6	cyclictest	366421	-21	kworker/u4:2+events_unbound	08:15:01	1
352406	99	70	18,48	cyclictest	544655	-21	rm	12:15:17	0
352406	99	69	37,30	cyclictest	388947	-21	processes	09:15:39	0
352406	99	69	36,30	cyclictest	420102	-21	timerwakeupswit	09:50:39	0
352406	99	69	34,33	cyclictest	374433	-21	aten_r7power_en	08:35:17	0
352406	99	69	21,45	cyclictest	0	-21	swapper/0	11:15:16	0
352406	99	68	57,8	cyclictest	512029	-21	kworker/u4:0+events_unbound	11:45:00	0
352406	99	68	4,20	cyclictest	558033	-21	ssh	12:30:31	0
352406	99	68	33,33	cyclictest	393001	-21	netstat	09:20:24	0
352406	99	68	2,20	cyclictest	519441	-21	ps	11:45:34	0
352406	99	67	48,10	cyclictest	255	50	irq/23-42890000.ethernet	07:09:59	0
352406	99	67	32,32	cyclictest	459487	-21	unixbench_singl	10:35:40	0
352406	99	66	4,10	cyclictest	480761	-21	ps	11:00:36	0
352406	99	66	34,28	cyclictest	0	-21	swapper/0	09:45:30	0
352406	99	66	2,16	cyclictest	401992	-21	ssh	09:30:28	0
352406	99	66	2,12	cyclictest	423325	-21	apt-get	09:55:15	0
352406	99	65	32,30	cyclictest	527374	-21	df_abs	11:55:17	0
352407	99	64	57,5	cyclictest	482112	-21	kworker/u4:2+events_unbound	11:06:01	1
352407	99	64	55,6	cyclictest	518336	-21	latency_hist	11:45:02	1
352407	99	64	48,10	cyclictest	0	-21	swapper/1	12:30:25	1
352406	99	64	4,17	cyclictest	509890	-21	apt-get	11:35:14	0
352406	99	64	4,13	cyclictest	540911	-21	ssh	12:10:34	0
352406	99	64	35,27	cyclictest	523055	-21	aten_r7power_vo	11:50:22	0
352406	99	64	35,27	cyclictest	441520	-21	sed	10:15:25	0
352406	99	64	35,26	cyclictest	356703	-21	fschecks_time	07:25:21	0
352406	99	64	34,27	cyclictest	0	-21	swapper/0	08:50:38	0
352406	99	64	30,30	cyclictest	0	-21	swapper/0	09:05:19	0
352407	99	63	46,7	cyclictest	516431	-21	kworker/u4:5+events_unbound	11:45:18	1
352406	99	63	29,31	cyclictest	0	-21	swapper/0	11:10:28	0
352406	99	63	2,14	cyclictest	549430	-21	ntpq	12:20:32	0
352406	99	63	20,38	cyclictest	0	-21	swapper/0	08:20:13	0
352407	99	62	54,6	cyclictest	438802	-21	kworker/u4:6+events_unbound	10:15:00	1
352406	99	62	5,7	cyclictest	405931	-21	diskstats	09:35:18	0
352406	99	62	2,18	cyclictest	373664	-21	ntpq	08:30:27	0
352406	99	62	2,12	cyclictest	366053	-21	ps	08:00:38	0
352406	99	62	1,16	cyclictest	398174	-21	sshd	09:25:43	0
352407	99	61	55,5	cyclictest	354906	-21	kworker/u4:12+events_unbound	09:20:42	1
352407	99	61	50,7	cyclictest	352403	-21	cyclictest	09:40:53	1
352407	99	61	49,6	cyclictest	0	-21	swapper/1	11:00:09	1
352406	99	61	4,13	cyclictest	450500	-21	ssh	10:25:39	0
352406	99	61	29,30	cyclictest	506663	-21	switchtime	11:30:37	0
352406	99	61	27,30	cyclictest	0	-21	swapper/0	07:50:01	0
352406	99	61	25,33	cyclictest	0	-21	swapper/0	09:00:31	0
352406	99	61	25,32	cyclictest	0	-21	swapper/0	08:55:13	0
352406	99	61	2,12	cyclictest	497008	-21	apt-get	11:20:13	0
352406	99	61	16,42	cyclictest	370285	-21	munin-plugin-st	08:20:00	0
352406	99	61	11,7	cyclictest	531479	-21	ssh	12:00:13	0
352407	99	60	53,5	cyclictest	482113	-21	kworker/u4:4+events_unbound	11:25:03	1
352407	99	60	45,8	cyclictest	417118	-21	kworker/u4:4+events_unbound	10:02:59	1
352406	99	60	53,5	cyclictest	502201	-21	/usr/sbin/munin	11:25:35	0
352406	99	60	29,28	cyclictest	0	-21	swapper/0	09:45:02	0
352406	99	60	25,32	cyclictest	360987	-21	sendmail_mailqu	07:40:37	0
352406	99	60	25,32	cyclictest	0	-21	swapper/0	07:10:18	0
352406	99	60	23,34	cyclictest	0	-21	swapper/0	10:00:25	0
352406	99	60	2,15	cyclictest	536417	-21	ntpq	12:05:25	0
352406	99	60	17,40	cyclictest	359064	-21	aten_r7power_vo	07:35:14	0
352406	99	60	11,8	cyclictest	451979	-21	kworker/u4:4-rpciod	10:30:28	0
352406	99	59	2,13	cyclictest	475448	-21	apt-get	10:55:11	0
352407	99	58	48,8	cyclictest	0	-21	swapper/1	11:55:19	1
352406	99	58	26,29	cyclictest	0	-21	swapper/0	07:30:14	0
352406	99	58	2,10	cyclictest	367217	-21	ntpq	08:05:29	0
352407	99	57	49,6	cyclictest	495163	-21	kworker/u4:13+events_unbound	11:33:59	1
352407	99	57	49,6	cyclictest	0	-21	swapper/1	09:10:15	1
352406	99	57	23,31	cyclictest	0	-21	swapper/0	10:20:22	0
352406	99	57	23,31	cyclictest	0	-21	swapper/0	08:40:35	0
352406	99	57	22,32	cyclictest	0	-21	swapper/0	07:20:23	0
352406	99	57	2,16	cyclictest	354400	-21	ntpq	07:15:24	0
352406	99	57	2,13	cyclictest	377159	-21	/usr/sbin/munin	08:45:20	0
352407	99	56	47,6	cyclictest	0	-21	swapper/1	10:15:12	1
352406	99	56	8,10	cyclictest	1068	-21	snmpd	08:13:21	0
352406	99	56	27,25	cyclictest	0	-21	swapper/0	12:25:19	0
352406	99	56	2,14	cyclictest	363284	-21	/usr/sbin/munin	07:50:23	0
352407	99	55	47,6	cyclictest	512030	-21	kworker/u4:1+events_unbound	12:01:59	1
352406	99	55	3,8	cyclictest	372473	-21	ntpq	08:25:33	0
352407	99	54	47,5	cyclictest	370229	-21	kworker/u4:7+events_unbound	10:06:01	1
352407	99	54	47,5	cyclictest	367690	-21	kworker/u4:3+events_unbound	09:05:41	1
352407	99	54	46,6	cyclictest	443202	-21	kworker/u4:9+events_unbound	10:32:01	1
352407	99	54	45,5	cyclictest	561494	-21	ssh	12:35:07	1
352407	99	53	46,5	cyclictest	399108	-21	kworker/u4:1+events_unbound	09:29:00	1
352407	99	53	31,7	cyclictest	362584	-21	kworker/u4:1+events_unbound	08:50:00	1
352407	99	53	28,12	cyclictest	0	-21	swapper/1	11:10:39	1
352407	99	52	43,7	cyclictest	0	-21	swapper/1	10:55:21	1
352407	99	52	37,6	cyclictest	351045	-21	kworker/u4:0+events_unbound	07:25:07	1
352407	99	52	35,7	cyclictest	524505	-21	kworker/u4:10+events_unbound	11:51:33	1
352407	99	51	35,4	cyclictest	525144	-21	kworker/u4:11+events_unbound	12:26:23	1
352407	99	50	43,5	cyclictest	538265	-21	kworker/u4:5+events_unbound	12:14:59	1
352407	99	49	42,5	cyclictest	352367	-21	kworker/u4:1+events_unbound	07:10:06	1
352407	99	49	41,6	cyclictest	417116	-21	kworker/u4:1+events_unbound	10:25:52	1
352407	99	49	40,7	cyclictest	459161	-21	processes	10:35:39	1
352407	99	49	29,9	cyclictest	451980	-21	kworker/u4:7+events_unbound	10:45:33	1
352407	99	48	41,5	cyclictest	512029	-21	kworker/u4:0+events_unbound	11:39:59	1
352407	99	48	41,5	cyclictest	403609	-21	kworker/u4:2+events_unbound	09:45:45	1
352407	99	48	38,7	cyclictest	369290	-21	aten_r7power_vo	08:15:17	1
352407	99	48	35,8	cyclictest	372913	-21	modprobe	08:30:01	1
352407	99	47	40,5	cyclictest	354906	-21	kworker/u4:12+events_unbound	08:35:36	1
352407	99	46	4,32	cyclictest	353839	-21	sshd	07:15:14	1
352407	99	45	38,5	cyclictest	0	-21	swapper/1	07:50:26	1
352407	99	43	37,4	cyclictest	376403	-21	mailstats	08:40:36	1
352407	99	43	34,7	cyclictest	389028	-21	switchtime	09:15:41	1
352407	99	40	32,5	cyclictest	0	-21	swapper/1	07:20:28	1
352407	99	39	31,6	cyclictest	366499	-21	latency_hist	08:05:06	1
352407	99	38	31,5	cyclictest	367356	-21	sendmail_mailqu	08:05:36	1
352407	99	36	27,7	cyclictest	0	-21	swapper/1	07:10:01	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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