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 highest latencies:

System rack7slot2.osadl.org (updated Fri Jul 10, 2026 12:44:10)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3450926	99	94	86,6	cyclictest	3450848	-21	kworker/u4:0+events_unbound	08:28:47	1
3450926	99	94	86,6	cyclictest	3450848	-21	kworker/u4:0+events_unbound	08:28:46	1
3450926	99	93	85,6	cyclictest	3453425	-21	kworker/u4:6+events_unbound	07:23:40	1
3450926	99	88	80,6	cyclictest	3559481	-21	kworker/u4:3+events_unbound	10:44:01	1
3450926	99	88	79,7	cyclictest	3479134	-21	kworker/u4:11+events_unbound	09:03:51	1
3450925	99	86	48,33	cyclictest	0	-21	swapper/0	12:00:34	0
3450926	99	84	76,6	cyclictest	3440998	-21	kworker/u4:7+events_unbound	08:13:46	1
3450926	99	84	76,6	cyclictest	3440998	-21	kworker/u4:7+events_unbound	08:13:46	1
3450926	99	83	76,5	cyclictest	3453424	-21	kworker/u4:1+events_unbound	07:58:42	1
3450925	99	81	69,9	cyclictest	53	-21	kswapd0	12:35:11	0
3450926	99	80	73,5	cyclictest	3462451	-21	kworker/u4:14+events_unbound	08:48:49	1
3450926	99	80	73,5	cyclictest	3073039	-21	kworker/u4:18+events_unbound	07:18:39	1
3450926	99	80	72,6	cyclictest	3452142	-21	kworker/u4:5+events_unbound	07:48:42	1
3450926	99	79	71,6	cyclictest	3470129	-21	kworker/u4:9+events_unbound	08:58:51	1
3450925	99	77	41,32	cyclictest	0	-21	swapper/0	11:35:25	0
3450926	99	76	70,5	cyclictest	3481700	-21	kworker/u4:17+events_unbound	10:19:00	1
3450925	99	76	36,37	cyclictest	256	50	irq/23-42890000.ethernet	11:00:13	0
3450925	99	76	10,57	cyclictest	3600885	-21	ssh	11:25:02	0
3450926	99	75	61,9	cyclictest	3557428	-21	fschecks_count	10:35:19	1
3450925	99	75	53,13	cyclictest	53	-21	kswapd0	12:15:11	0
3450925	99	74	43,19	cyclictest	0	-21	swapper/0	11:55:12	0
3450925	99	74	38,29	cyclictest	256	50	irq/23-42890000.ethernet	08:45:14	0
3450925	99	73	28,41	cyclictest	0	-21	swapper/0	12:20:39	0
3450925	99	72	4,27	cyclictest	3531540	-21	ssh	10:05:33	0
3450925	99	72	35,33	cyclictest	3469070	-21	aten2__	08:20:16	0
3450925	99	72	30,39	cyclictest	0	-21	swapper/0	07:25:24	0
3450926	99	71	64,5	cyclictest	3550554	-21	kworker/u4:2+events_unbound	10:29:03	1
3450925	99	71	20,48	cyclictest	0	-21	swapper/0	10:00:26	0
3450925	99	71	1,21	cyclictest	3566598	-21	ssh	10:45:26	0
3450926	99	70	56,6	cyclictest	3568440	-21	kworker/u4:6+events_unbound	10:52:46	1
3450925	99	70	52,13	cyclictest	53	-21	kswapd0	09:30:13	0
3450925	99	70	41,26	cyclictest	3466321	-21	grep	08:10:00	0
3450925	99	69	37,29	cyclictest	3601178	-21	aten_r7power_en	11:25:15	0
3450925	99	69	35,31	cyclictest	3623331	-21	/usr/sbin/munin	11:50:19	0
3450925	99	69	35,31	cyclictest	3623331	-21	/usr/sbin/munin	11:50:18	0
3450925	99	69	3,20	cyclictest	3606303	-21	ssh	11:30:33	0
3450925	99	69	30,37	cyclictest	3571221	-21	proc_pri	10:50:38	0
3450926	99	68	61,5	cyclictest	3471405	-21	kworker/u4:8+events_unbound	09:08:52	1
3450925	99	68	34,31	cyclictest	3505416	-21	switchtime	09:35:42	0
3450925	99	68	26,38	cyclictest	3471160	-21	ls	08:25:39	0
3450925	99	68	26,38	cyclictest	3471160	-21	ls	08:25:39	0
3450925	99	68	18,6	cyclictest	0	-21	swapper/0	09:40:15	0
3450925	99	67	33,31	cyclictest	3463954	-21	aten2__	08:00:14	0
3450925	99	67	26,36	cyclictest	256	50	irq/23-42890000.ethernet	09:25:17	0
3450926	99	66	52,9	cyclictest	3536027	-21	ssh	10:10:38	1
3450926	99	66	52,9	cyclictest	3536027	-21	ssh	10:10:38	1
3450925	99	66	37,27	cyclictest	3653862	-21	aten_r7power_vo	12:25:18	0
3450925	99	66	36,27	cyclictest	3466747	-21	cut	08:10:22	0
3450925	99	66	36,27	cyclictest	3466747	-21	cut	08:10:21	0
3450925	99	66	36,27	cyclictest	0	-21	swapper/0	12:14:11	0
3450925	99	66	31,32	cyclictest	3450922	-21	cyclictest	12:05:41	0
3450925	99	66	28,34	cyclictest	0	-21	swapper/0	09:05:22	0
3450925	99	66	10,48	cyclictest	3481739	-21	diskmemload	11:40:25	0
3450925	99	65	26,36	cyclictest	0	-21	swapper/0	08:50:19	0
3450925	99	65	14,48	cyclictest	0	-21	swapper/0	10:20:20	0
3450925	99	64	30,29	cyclictest	3479134	-21	kworker/u4:11-xprtiod	09:50:02	0
3450925	99	64	27,33	cyclictest	0	-21	swapper/0	11:05:17	0
3450925	99	64	2,19	cyclictest	3518364	-21	ssh	09:50:34	0
3450925	99	63	29,30	cyclictest	0	-21	swapper/0	12:30:41	0
3450925	99	63	28,31	cyclictest	0	-21	swapper/0	08:15:28	0
3450925	99	63	26,33	cyclictest	3457040	-21	timerandwakeup	07:30:38	0
3450925	99	62	3,12	cyclictest	53	-21	kswapd0	10:55:07	0
3450925	99	62	29,29	cyclictest	0	-21	swapper/0	07:20:38	0
3450925	99	62	28,30	cyclictest	0	-21	swapper/0	09:55:39	0
3450925	99	62	26,33	cyclictest	3457805	-21	fschecks_count	07:35:24	0
3450925	99	62	26,32	cyclictest	0	-21	swapper/0	09:15:01	0
3450925	99	62	25,33	cyclictest	0	-21	swapper/0	10:40:29	0
3450925	99	61	39,20	cyclictest	3491193	-21	aten_r7power_vo	09:20:18	0
3450925	99	61	3,11	cyclictest	3589215	-21	users	11:10:41	0
3450925	99	61	28,16	cyclictest	3592923	-21	sh	11:15:26	0
3450925	99	61	26,32	cyclictest	0	-21	swapper/0	10:15:20	0
3450925	99	61	26,32	cyclictest	0	-21	swapper/0	07:45:17	0
3450926	99	60	49,8	cyclictest	3566235	-21	ssh	10:45:18	1
3450925	99	60	31,26	cyclictest	3590099	-21	kworker/u4:0-rpciod	11:45:39	0
3450925	99	60	26,30	cyclictest	0	-21	swapper/0	09:20:02	0
3450925	99	60	25,31	cyclictest	256	50	irq/23-42890000.ethernet	10:10:36	0
3450925	99	60	25,31	cyclictest	256	50	irq/23-42890000.ethernet	10:10:36	0
3450925	99	60	24,32	cyclictest	0	-21	swapper/0	10:35:29	0
3450925	99	60	20,8	cyclictest	3479149	-21	cron	08:59:59	0
3450925	99	60	20,36	cyclictest	0	-21	swapper/0	09:00:22	0
3450925	99	59	23,32	cyclictest	0	-21	swapper/0	10:30:30	0
3450926	99	58	50,5	cyclictest	3636179	-21	sh	12:05:16	1
3450925	99	58	23,32	cyclictest	0	-21	swapper/0	07:10:15	0
3450925	99	58	22,3	cyclictest	0	-21	swapper/0	08:30:25	0
3450925	99	58	21,5	cyclictest	256	50	irq/23-42890000.ethernet	10:25:33	0
3450925	99	58	14,11	cyclictest	3474142	-21	sed	08:40:01	0
3450925	99	57	2,17	cyclictest	3463290	-21	ntpq	07:55:34	0
3450925	99	57	18,4	cyclictest	3459183	-21	fschecks_time	07:40:20	0
3450926	99	55	48,5	cyclictest	3594554	-21	kworker/u4:8+events_unbound	11:20:00	1
3450926	99	55	48,5	cyclictest	3479134	-21	kworker/u4:11+events_unbound	09:58:58	1
3450926	99	55	45,6	cyclictest	3584366	-21	/usr/sbin/munin	11:05:36	1
3450926	99	55	45,5	cyclictest	0	-21	swapper/1	12:30:11	1
3450925	99	55	46,7	cyclictest	3453430	-21	systemd	07:18:38	0
3450926	99	54	47,5	cyclictest	3450848	-21	kworker/u4:0+events_unbound	08:30:02	1
3450926	99	53	45,6	cyclictest	3631943	-21	/usr/sbin/munin	12:00:17	1
3450926	99	53	44,6	cyclictest	0	-21	swapper/1	11:00:11	1
3450926	99	52	45,5	cyclictest	3458616	-21	kworker/u4:11+events_unbound	07:50:01	1
3450926	99	52	44,5	cyclictest	0	-21	swapper/1	10:55:32	1
3450926	99	52	43,7	cyclictest	3475245	-21	systemd	08:43:47	1
3450926	99	52	41,6	cyclictest	3499623	-21	apt-get	09:30:08	1
3450926	99	52	38,9	cyclictest	3541619	-21	kworker/u4:4-rpciod	11:29:56	1
3450926	99	52	26,18	cyclictest	3612442	-21	kworker/u4:6-rpciod	11:40:54	1
3450925	99	52	1,12	cyclictest	3450978	-21	latency_hist	07:10:02	0
3450926	99	51	44,5	cyclictest	3440998	-21	kworker/u4:7+events_unbound	08:00:02	1
3450926	99	51	39,5	cyclictest	3463720	-21	kworker/u4:15+events_unbound	08:17:00	1
3450926	99	50	44,5	cyclictest	3603532	-21	kworker/u4:18+events_unbound	11:35:46	1
3450926	99	50	38,9	cyclictest	3505644	-21	sh	09:35:44	1
3450926	99	49	42,5	cyclictest	3627845	-21	gltestperf	11:55:20	1
3450926	99	49	42,5	cyclictest	3596754	-21	aten_r7power_en	11:20:16	1
3450926	99	49	41,6	cyclictest	3553763	-21	switchtime	10:30:37	1
3450926	99	48	5,32	cyclictest	3662484	-21	ssh	12:35:10	1
3450926	99	48	40,6	cyclictest	3513626	-21	gltestperf	09:45:19	1
3450926	99	48	40,6	cyclictest	3470139	-21	systemd	08:23:46	1
3450926	99	48	39,6	cyclictest	0	-21	swapper/1	10:10:00	1
3450926	99	47	41,4	cyclictest	3634091	-21	kworker/u4:1-rpciod	12:15:45	1
3450926	99	47	40,5	cyclictest	3457830	-21	fschecks_count	07:35:23	1
3450926	99	47	39,5	cyclictest	0	-21	swapper/1	11:30:24	1
3450926	99	47	30,11	cyclictest	3527201	-21	ld	10:00:36	1
3450926	99	46	38,6	cyclictest	3641671	-21	/usr/sbin/munin	12:10:38	1
3450926	99	45	38,5	cyclictest	3544265	-21	cut	10:20:19	1
3450926	99	45	36,6	cyclictest	3519313	-21	sshd	09:51:25	1
3450926	99	45	35,7	cyclictest	3499670	-21	latency_hist	09:30:01	1
3450926	99	44	37,5	cyclictest	3620725	-21	kworker/u4:8+events_unbound	11:50:04	1
3450926	99	44	37,5	cyclictest	3620725	-21	kworker/u4:8+events_unbound	11:50:04	1
3450926	99	44	37,5	cyclictest	3482168	-21	aten_r7power_en	09:10:18	1
3450926	99	44	34,6	cyclictest	0	-21	swapper/1	09:15:17	1
3450926	99	43	35,5	cyclictest	0	-21	swapper/1	09:20:32	1
3450926	99	43	34,6	cyclictest	0	-21	swapper/1	12:20:34	1
3450926	99	43	34,5	cyclictest	3454947	-21	grep	07:25:18	1
3450926	99	43	32,7	cyclictest	0	-21	swapper/1	11:45:24	1
3450926	99	43	21,19	cyclictest	27	1	ktimers/1	09:40:34	1
3450925	99	43	35,6	cyclictest	0	-21	swapper/0	08:40:24	0
3450925	99	43	35,5	cyclictest	3462317	-21	unixbench-2d	07:50:38	0
3450926	99	42	34,6	cyclictest	3450848	-21	kworker/u4:0+events_unbound	08:35:03	1
3450926	99	42	34,6	cyclictest	0	-21	swapper/1	12:25:32	1
3450926	99	42	33,7	cyclictest	3451209	-21	aten_r7power_vo	07:10:16	1
3450926	99	41	34,4	cyclictest	3459969	-21	grep	07:45:01	1
3450926	99	40	34,4	cyclictest	3450848	-21	kworker/u4:0+events_unbound	08:50:03	1
3450926	99	40	31,7	cyclictest	0	-21	swapper/1	11:10:32	1
3450926	99	39	16,5	cyclictest	17	1	rcu_preempt	07:30:34	1
3450926	99	37	27,8	cyclictest	0	-21	swapper/1	08:05:19	1
3450926	99	28	18,6	cyclictest	3448412	-21	kworker/u4:4-xprtiod	07:10:00	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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