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 100 highest latencies:

System rack7slot2.osadl.org (updated Tue Aug 11, 2026 12:44:09)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
466453	99	99	91,6	cyclictest	676858	-21	kworker/u4:6+events_unbound	12:34:27	1
466453	99	99	91,6	cyclictest	676858	-21	kworker/u4:6+events_unbound	12:34:27	1
466453	99	94	86,6	cyclictest	641732	-21	kworker/u4:7+events_unbound	11:59:25	1
466453	99	91	83,6	cyclictest	672373	-21	kworker/u4:5+events_unbound	12:29:26	1
466453	99	90	81,6	cyclictest	610925	-21	kworker/u4:3+events_unbound	11:34:21	1
466453	99	90	81,6	cyclictest	610925	-21	kworker/u4:3+events_unbound	11:34:21	1
466452	99	88	58,25	cyclictest	53	-21	kswapd0	09:30:13	0
466453	99	83	63,6	cyclictest	522268	-21	kworker/u4:6+events_unbound	09:38:54	1
466452	99	83	67,14	cyclictest	579472	-21	kworker/u4:6+events_unbound	10:49:13	0
466452	99	80	44,28	cyclictest	256	50	irq/23-42890000.ethernet	08:05:06	0
466453	99	79	72,5	cyclictest	650649	-21	kworker/u4:3+events_unbound	12:05:02	1
466453	99	76	69,5	cyclictest	553126	-21	kworker/u4:17+events_unbound	10:14:08	1
466453	99	75	56,6	cyclictest	606435	-21	kworker/u4:0+events_unbound	11:29:20	1
466453	99	74	53,8	cyclictest	667905	-21	kworker/u4:1+events_unbound	12:23:46	1
466453	99	72	66,4	cyclictest	468946	-21	kworker/u4:15+events_unbound	07:18:43	1
466453	99	72	3,58	cyclictest	529605	-21	ssh	09:45:33	1
466453	99	71	65,4	cyclictest	588437	-21	kworker/u4:2+events_unbound	10:54:14	1
466452	99	67	28,10	cyclictest	485870	-21	apt-get	08:25:16	0
466453	99	66	58,6	cyclictest	548665	-21	kworker/u4:14+events_unbound	10:09:07	1
466452	99	66	55,8	cyclictest	579472	-21	kworker/u4:6+events_unbound	10:59:15	0
466453	99	62	52,7	cyclictest	588441	-21	kworker/u4:12+events_unbound	11:15:36	1
466453	99	61	57,3	cyclictest	676859	-21	kworker/u4:8+events_unbound	12:35:15	1
466453	99	61	57,3	cyclictest	676859	-21	kworker/u4:8+events_unbound	12:35:15	1
466452	99	61	21,22	cyclictest	648582	-21	ssh	12:00:20	0
466453	99	60	53,4	cyclictest	544163	-21	kworker/u4:6+events_unbound	10:25:01	1
466452	99	60	40,17	cyclictest	53	-21	kswapd0	12:05:07	0
466452	99	59	14,24	cyclictest	547260	-21	ntpq	10:05:28	0
466452	99	59	12,11	cyclictest	622008	-21	df_inode	11:30:18	0
466452	99	59	12,11	cyclictest	622008	-21	df_inode	11:30:18	0
466453	99	58	48,8	cyclictest	484379	-21	systemd	08:18:43	1
466452	99	58	23,12	cyclictest	551602	-21	ntpq	10:10:27	0
466452	99	58	22,14	cyclictest	493113	-21	sed	08:50:38	0
466452	99	58	20,13	cyclictest	627009	-21	ntpq	11:35:34	0
466452	99	58	17,11	cyclictest	489023	-21	ntpq	08:35:29	0
466452	99	58	15,22	cyclictest	476666	-21	apt	07:50:00	0
466453	99	57	50,5	cyclictest	588441	-21	kworker/u4:12+events_unbound	11:04:17	1
466453	99	57	50,5	cyclictest	508671	-21	kworker/u4:11+events_unbound	09:59:06	1
466453	99	57	46,8	cyclictest	603267	-21	systemd	11:09:17	1
466452	99	57	25,28	cyclictest	661347	-21	apt-get	12:15:12	0
466452	99	57	19,12	cyclictest	520606	-21	ntpq	09:35:29	0
466452	99	57	17,15	cyclictest	681689	-21	ssh	12:37:51	0
466452	99	57	17,15	cyclictest	681689	-21	ssh	12:37:51	0
466452	99	57	10,24	cyclictest	609356	-21	ssh	11:15:36	0
466452	99	56	9,24	cyclictest	0	-21	swapper/0	10:30:12	0
466452	99	56	40,13	cyclictest	657951	-21	open_inodes	12:10:38	0
466452	99	56	18,11	cyclictest	601111	-21	ssh	11:05:54	0
466452	99	56	17,15	cyclictest	532433	-21	ssh	09:49:16	0
466452	99	55	9,21	cyclictest	1073	-21	snmpd	10:04:40	0
466452	99	55	42,9	cyclictest	604451	-21	fschecks_time	11:10:21	0
466452	99	55	42,9	cyclictest	604451	-21	fschecks_time	11:10:20	0
466452	99	55	26,5	cyclictest	493516	-21	apt-get	08:55:13	0
466452	99	55	19,11	cyclictest	573859	-21	ntpq	10:35:31	0
466452	99	55	17,12	cyclictest	586337	-21	ssh	10:50:12	0
466452	99	55	17,12	cyclictest	507331	-21	ntpq	09:20:32	0
466452	99	55	16,13	cyclictest	558703	-21	ssh	10:18:48	0
466453	99	54	45,7	cyclictest	317	-21	systemd-journal	10:44:12	1
466453	99	54	45,5	cyclictest	0	-21	swapper/1	11:50:20	1
466452	99	54	32,17	cyclictest	511826	-21	ssh	09:25:33	0
466452	99	54	18,12	cyclictest	0	-21	swapper/0	11:50:16	0
466452	99	54	17,11	cyclictest	534720	-21	ssh	09:50:54	0
466452	99	54	12,18	cyclictest	636333	-21	awk	11:45:42	0
466452	99	54	10,24	cyclictest	0	-21	swapper/0	08:40:34	0
466453	99	53	36,5	cyclictest	483094	-21	kworker/u4:15+events_unbound	08:45:02	1
466452	99	53	27,8	cyclictest	479982	-21	ntpq	08:00:29	0
466452	99	53	17,10	cyclictest	644383	-21	ssh	11:55:24	0
466452	99	53	14,16	cyclictest	673458	-21	ssh	12:28:44	0
466452	99	53	13,16	cyclictest	666161	-21	grep	12:20:19	0
466452	99	53	12,9	cyclictest	502879	-21	ntp_states	09:15:35	0
466452	99	52	22,9	cyclictest	472503	-21	cat	07:30:37	0
466452	99	52	19,10	cyclictest	619017	-21	ssh	11:26:15	0
466452	99	52	17,10	cyclictest	675426	-21	ntp_states	12:30:34	0
466452	99	52	17,10	cyclictest	675426	-21	ntp_states	12:30:34	0
466452	99	52	15,16	cyclictest	487703	-21	ntpq	08:30:26	0
466452	99	52	12,20	cyclictest	565165	-21	ntp_states	10:25:40	0
466452	99	52	12,10	cyclictest	538317	-21	ntpq	09:55:26	0
466453	99	51	2,38	cyclictest	497195	-21	diskmemload	09:10:31	1
466452	99	51	37,9	cyclictest	485704	-21	idleruntime-cro	08:25:00	0
466452	99	51	30,17	cyclictest	577806	-21	ssh	10:40:18	0
466452	99	51	29,17	cyclictest	498400	-21	ssh	09:10:36	0
466452	99	51	21,26	cyclictest	613748	-21	ssh	11:20:33	0
466452	99	51	15,13	cyclictest	478446	-21	perl	07:55:22	0
466453	99	50	43,5	cyclictest	559500	-21	latency_hist	10:20:00	1
466453	99	50	43,5	cyclictest	472067	-21	fschecks_time	07:30:20	1
466452	99	50	29,14	cyclictest	466602	-21	apt-get	07:10:12	0
466452	99	50	16,11	cyclictest	630886	-21	diskstats	11:40:18	0
466453	99	49	42,5	cyclictest	543350	-21	sed	10:00:45	1
466453	99	49	42,5	cyclictest	522266	-21	kworker/u4:4+events_unbound	09:50:03	1
466453	99	49	39,7	cyclictest	470258	-21	kworker/u4:9-rpciod	07:35:39	1
466452	99	49	8,20	cyclictest	0	-21	swapper/0	10:20:35	0
466452	99	49	17,10	cyclictest	469400	-21	df_inode	07:20:17	0
466452	99	49	15,9	cyclictest	482556	-21	ntpq	08:10:26	0
466452	99	49	13,11	cyclictest	495449	-21	ntp_states	09:00:33	0
466452	99	49	11,19	cyclictest	474115	-21	modprobe	07:40:00	0
466453	99	48	41,5	cyclictest	608178	-21	idleruntime-cro	11:15:00	1
466453	99	48	41,5	cyclictest	608178	-21	idleruntime-cro	11:15:00	1
466453	99	48	41,5	cyclictest	522265	-21	kworker/u4:3+events_unbound	09:43:56	1
466453	99	48	41,5	cyclictest	480466	-21	kworker/u4:0+events_unbound	08:05:01	1
466452	99	48	41,5	cyclictest	474631	-21	fschecks_time	07:40:17	0
466452	99	48	29,15	cyclictest	483293	-21	apt-get	08:15:12	0
466452	99	48	13,10	cyclictest	468720	-21	find	07:15:37	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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