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 Tue Aug 11, 2026 00:44:09)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4008755	99	94	4,32	cyclictest	4016406	-21	apt-get	19:40:10	0
4008755	99	91	83,6	cyclictest	4140756	-21	kworker/u4:5+events_unbound	23:02:45	0
4008755	99	78	67,8	cyclictest	4158692	-21	kworker/u4:16+events_unbound	23:27:50	0
4008756	99	77	69,6	cyclictest	4096334	-21	kworker/u4:1+events_unbound	22:20:01	1
4008756	99	76	29,29	cyclictest	0	-21	swapper/1	22:30:37	1
4008756	99	76	24,29	cyclictest	0	-21	swapper/1	22:45:42	1
4008755	99	76	69,5	cyclictest	4175871	-21	kworker/u4:3+events_unbound	00:02:53	0
4008756	99	75	68,4	cyclictest	0	-21	swapper/1	21:40:35	1
4008756	99	75	32,25	cyclictest	0	-21	swapper/1	21:35:30	1
4008755	99	74	65,7	cyclictest	4087193	-21	kworker/u4:1+events_unbound	22:02:38	0
4008755	99	74	65,7	cyclictest	4055913	-21	kworker/u4:4+events_unbound	21:52:36	0
4008755	99	74	62,9	cyclictest	53	-21	kswapd0	22:20:12	0
4008756	99	72	23,31	cyclictest	0	-21	swapper/1	00:35:12	1
4008756	99	70	2,16	cyclictest	4121528	-21	ssh	22:40:33	1
4008756	99	69	26,26	cyclictest	0	-21	swapper/1	21:20:35	1
4008756	99	66	35,29	cyclictest	4192295	-21	find	00:00:42	1
4008755	99	66	59,4	cyclictest	53	-21	kswapd0	23:35:11	0
4008755	99	66	51,9	cyclictest	4045704	-21	switchtime	21:15:42	0
4008756	99	65	34,29	cyclictest	4058719	-21	kernelversion	21:30:27	1
4008756	99	65	34,28	cyclictest	4057803	-21	ssh	21:30:01	1
4008756	99	65	32,31	cyclictest	4143928	-21	switchtime	23:05:39	1
4008755	99	65	57,6	cyclictest	4016364	-21	kworker/u4:16+xprtiod	20:25:19	0
4008756	99	64	4,20	cyclictest	4160499	-21	ssh	23:25:15	1
4008756	99	63	43,18	cyclictest	4008753	-21	cyclictest	20:00:45	1
4008756	99	63	4,15	cyclictest	1721	-21	apt-get	00:05:16	1
4008756	99	63	4,15	cyclictest	1721	-21	apt-get	00:05:15	1
4008756	99	63	31,28	cyclictest	0	-21	swapper/1	23:56:16	1
4008756	99	63	25,35	cyclictest	0	-21	swapper/1	22:20:50	1
4008756	99	62	4,19	cyclictest	4130453	-21	ssh	22:50:38	1
4008756	99	62	33,27	cyclictest	19404	-21	aten_r7power_vo	00:25:15	1
4008756	99	62	30,29	cyclictest	4011020	-21	threads	19:15:41	1
4008756	99	62	1,54	cyclictest	4165729	-21	ntpq	23:30:35	1
4008755	99	62	53,6	cyclictest	4166225	-21	/usr/sbin/munin	23:30:43	0
4008755	99	62	2,49	cyclictest	11355	-21	rm	00:15:38	0
4008755	99	62	2,49	cyclictest	11355	-21	rm	00:15:37	0
4008756	99	61	4,22	cyclictest	4152326	-21	ntpq	23:15:27	1
4008756	99	61	38,20	cyclictest	4116953	-21	/usr/sbin/munin	22:35:25	1
4008755	99	61	53,6	cyclictest	4100912	-21	kworker/u4:0+events_unbound	22:37:42	0
4008755	99	61	53,6	cyclictest	4022852	-21	kworker/u4:6+events_unbound	20:37:25	0
4008755	99	61	36,22	cyclictest	256	50	irq/23-42890000.ethernet	21:00:21	0
4008756	99	60	45,9	cyclictest	4011248	-21	kworker/u4:10-rpciod	19:30:18	1
4008756	99	60	45,9	cyclictest	4011248	-21	kworker/u4:10-rpciod	19:30:18	1
4008756	99	60	27,27	cyclictest	0	-21	swapper/1	00:35:01	1
4008756	99	60	2,14	cyclictest	4179039	-21	ssh	23:45:39	1
4008755	99	60	46,10	cyclictest	53	-21	kswapd0	22:55:11	0
4008756	99	59	9,46	cyclictest	4045516	-21	ssh	21:15:40	1
4008756	99	59	29,28	cyclictest	7134	-21	switchtime	00:10:39	1
4008756	99	59	27,28	cyclictest	0	-21	swapper/1	22:15:01	1
4008756	99	59	26,30	cyclictest	4081666	-21	timerandwakeup	21:55:37	1
4008756	99	59	2,19	cyclictest	4076948	-21	ntpq	21:50:34	1
4008756	99	59	2,15	cyclictest	4018508	-21	ntpq	19:45:25	1
4008755	99	59	45,9	cyclictest	4039753	-21	diskmemload	23:45:17	0
4008756	99	58	4,7	cyclictest	4032739	-21	ntpq	20:40:26	1
4008756	99	58	4,12	cyclictest	14899	-21	apt-get	00:20:15	1
4008756	99	58	3,17	cyclictest	11313	-21	ssh	00:15:36	1
4008756	99	58	3,17	cyclictest	11313	-21	ssh	00:15:36	1
4008756	99	58	3,13	cyclictest	4148174	-21	ps	23:10:36	1
4008756	99	58	29,26	cyclictest	0	-21	swapper/1	20:20:20	1
4008756	99	58	28,27	cyclictest	0	-21	swapper/1	21:45:17	1
4008756	99	58	28,26	cyclictest	0	-21	swapper/1	22:55:26	1
4008755	99	58	50,6	cyclictest	4153551	-21	kworker/u4:11+events_unbound	23:17:48	0
4008755	99	58	3,28	cyclictest	23705	-21	apt	00:30:12	0
4008756	99	57	3,50	cyclictest	4156815	-21	ntpq	23:20:29	1
4008756	99	57	3,15	cyclictest	4174431	-21	ntpq	23:40:30	1
4008756	99	57	29,25	cyclictest	0	-21	swapper/1	23:00:26	1
4008756	99	57	2,8	cyclictest	4041004	-21	ps	21:10:37	1
4008756	99	57	21,32	cyclictest	4024182	-21	dpkg	20:10:01	1
4008756	99	57	1,11	cyclictest	4015295	-21	apt-get	19:35:09	1
4008756	99	56	2,6	cyclictest	4034008	-21	ntpq	20:45:26	1
4008756	99	56	23,28	cyclictest	0	-21	swapper/1	19:15:01	1
4008756	99	56	22,31	cyclictest	0	-21	swapper/1	20:30:42	1
4008756	99	56	2,16	cyclictest	4108048	-21	ssh	22:25:22	1
4008756	99	56	2,15	cyclictest	4090312	-21	ssh	22:05:29	1
4008756	99	56	1,13	cyclictest	4035307	-21	ntpq	20:50:27	1
4008755	99	56	48,6	cyclictest	4175871	-21	kworker/u4:3+events_unbound	23:42:51	0
4008755	99	56	41,12	cyclictest	4187351	-21	if_err_eth0	23:55:19	0
4008755	99	56	10,37	cyclictest	4081348	-21	ssh	21:55:29	0
4008756	99	55	3,12	cyclictest	4182431	-21	apt-get	23:50:11	1
4008756	99	55	23,29	cyclictest	0	-21	swapper/1	22:01:16	1
4008756	99	55	1,7	cyclictest	4169305	-21	apt-get	23:35:17	1
4008756	99	55	1,14	cyclictest	4019441	-21	diskstats	19:50:18	1
4008756	99	55	1,13	cyclictest	4031478	-21	ntpq	20:35:28	1
4008755	99	55	44,9	cyclictest	317	-21	systemd-journal	21:32:32	0
4008755	99	55	43,8	cyclictest	53	-21	kswapd0	22:10:01	0
4008756	99	54	4,6	cyclictest	4024954	-21	ntpq	20:10:30	1
4008756	99	54	2,7	cyclictest	4021114	-21	ntpq	19:55:30	1
4008756	99	54	2,5	cyclictest	4037943	-21	ntpq	21:00:38	1
4008756	99	54	2,14	cyclictest	4012088	-21	ntpq	19:20:32	1
4008756	99	54	2,13	cyclictest	4016364	-21	kworker/u4:16+xprtiod	20:25:10	1
4008755	99	54	45,6	cyclictest	4015618	-21	fschecks_time	19:35:17	0
4008756	99	53	3,7	cyclictest	4007474	-21	kworker/u4:1+xprtiod	19:40:13	1
4008756	99	53	20,30	cyclictest	0	-21	swapper/1	21:10:01	1
4008755	99	53	46,5	cyclictest	4091767	-21	kworker/u4:2+events_unbound	22:10:03	0
4008755	99	53	45,6	cyclictest	4098839	-21	/usr/sbin/munin	22:15:18	0
4008755	99	53	44,7	cyclictest	4069637	-21	kworker/u4:10+events_unbound	21:42:34	0
4008756	99	52	2,5	cyclictest	4026258	-21	ntpq	20:15:29	1
4008756	99	52	2,10	cyclictest	4012756	-21	apt-get	19:25:11	1
4008755	99	52	44,5	cyclictest	4072527	-21	/usr/sbin/munin	21:45:38	0
4008755	99	52	34,15	cyclictest	4011292	-21	sh	19:20:01	0
4008755	99	52	32,17	cyclictest	0	-21	swapper/0	21:20:36	0
4008755	99	51	42,7	cyclictest	19	1	rcuc/0	19:12:12	0
4008756	99	50	2,7	cyclictest	4036541	-21	ntpq	20:55:24	1
4008755	99	50	40,8	cyclictest	4020585	-21	aten_r7power_po	19:55:16	0
4008755	99	50	40,6	cyclictest	0	-21	swapper/0	00:35:38	0
4008755	99	50	33,14	cyclictest	0	-21	swapper/0	20:56:46	0
4008755	99	49	42,5	cyclictest	4129994	-21	gltestperf	22:50:23	0
4008755	99	49	42,5	cyclictest	4108476	-21	ps	22:25:38	0
4008755	99	49	39,7	cyclictest	4060482	-21	kworker/u4:2-rpciod	21:35:25	0
4008755	99	49	33,9	cyclictest	4028089	-21	kworker/u4:6	20:25:00	0
4008755	99	49	2,38	cyclictest	4156799	-21	ntpq	23:20:28	0
4008755	99	48	41,5	cyclictest	16215	-21	unixbench_singl	00:20:46	0
4008755	99	48	41,5	cyclictest	0	-21	swapper/0	23:10:12	0
4008755	99	48	40,6	cyclictest	4125673	-21	/usr/sbin/munin	22:45:24	0
4008755	99	48	40,6	cyclictest	4031951	-21	kworker/u4:0+events_unbound	21:12:30	0
4008755	99	48	39,7	cyclictest	5739	-21	cron	00:10:00	0
4008755	99	48	39,7	cyclictest	5739	-21	cron	00:09:59	0
4008755	99	48	39,7	cyclictest	4054791	-21	unixbench-2d	21:25:39	0
4008755	99	48	38,6	cyclictest	4143320	-21	gltestperf	23:05:20	0
4008755	99	48	31,15	cyclictest	4011808	-21	fschecks_time	19:20:21	0
4008756	99	47	14,28	cyclictest	0	-21	swapper/1	19:10:02	1
4008756	99	47	14,28	cyclictest	0	-21	swapper/1	19:10:02	1
4008755	99	47	37,7	cyclictest	4029673	-21	aten_r7power_en	20:30:19	0
4008755	99	47	37,7	cyclictest	4026024	-21	fschecks_time	20:15:21	0
4008755	99	47	21,20	cyclictest	0	-21	swapper/0	20:10:11	0
4008755	99	46	39,5	cyclictest	4111972	-21	basename	22:30:15	0
4008755	99	45	37,6	cyclictest	4034517	-21	kworker/u4:11+events_unbound	20:52:26	0
4008755	99	45	36,7	cyclictest	4032275	-21	aten_r7power_po	20:40:17	0
4008755	99	45	34,8	cyclictest	4171446	-21	kworker/u4:9-rpciod	23:50:19	0
4008755	99	44	36,5	cyclictest	4034518	-21	kworker/u4:17+events_unbound	21:10:00	0
4008755	99	44	35,7	cyclictest	19695	-21	sh	00:25:18	0
4008755	99	44	22,18	cyclictest	4034535	-21	cron	20:49:59	0
4008755	99	44	21,6	cyclictest	4007477	-21	kworker/u4:6-rpciod	19:30:29	0
4008755	99	44	21,6	cyclictest	4007477	-21	kworker/u4:6-rpciod	19:30:29	0
4008755	99	44	21,19	cyclictest	4011248	-21	kworker/u4:10-rpciod	19:30:01	0
4008755	99	43	36,5	cyclictest	4007475	-21	kworker/u4:2+events_unbound	20:02:18	0
4008755	99	43	34,7	cyclictest	4019331	-21	aten_r7power_vo	19:50:17	0
4008755	99	43	33,6	cyclictest	4024148	-21	modprobe	20:10:00	0
4008755	99	43	32,9	cyclictest	4121359	-21	netstat	22:40:25	0
4008755	99	42	35,5	cyclictest	10181	-21	grep	00:15:01	0
4008755	99	38	28,7	cyclictest	0	-21	swapper/0	19:45:14	0
4008755	99	36	27,6	cyclictest	0	-21	swapper/0	19:10:01	0
4008755	99	36	27,6	cyclictest	0	-21	swapper/0	19:10:01	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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