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 376 highest latencies:

System rack7slot2.osadl.org (updated Sat Feb 14, 2026 00:44:11)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2860858	99	88	81,5	cyclictest	2876146	-21	kworker/u4:16+events_unbound	20:21:54	1
2860858	99	88	81,5	cyclictest	2876146	-21	kworker/u4:16+events_unbound	20:21:53	1
2860858	99	86	79,5	cyclictest	2860794	-21	kworker/u4:8+events_unbound	19:16:44	1
2860857	99	85	80,3	cyclictest	2872265	-21	kworker/u4:4+events_unbound	21:06:58	0
2860858	99	84	78,4	cyclictest	2872267	-21	kworker/u4:8+events_unbound	20:11:51	1
2860857	99	79	8,23	cyclictest	2965346	-21	ssh	22:35:24	0
2860857	99	78	69,6	cyclictest	3018209	-21	kworker/u4:0+events_unbound	23:37:25	0
2860857	99	77	29,45	cyclictest	0	-21	swapper/0	00:00:11	0
2860857	99	76	14,13	cyclictest	2957249	-21	sed	22:25:36	0
2860857	99	75	3,23	cyclictest	2892324	-21	ssh	21:10:25	0
2860857	99	73	5,13	cyclictest	2909081	-21	ssh	21:30:12	0
2860857	99	72	59,9	cyclictest	54	-21	kswapd0	23:45:11	0
2860857	99	71	63,6	cyclictest	2631949	-21	kworker/u4:6+events_unbound	19:11:41	0
2860857	99	71	59,7	cyclictest	0	-21	swapper/0	23:25:26	0
2860857	99	71	38,30	cyclictest	2901080	-21	/usr/sbin/munin	21:20:27	0
2860857	99	71	28,8	cyclictest	3020154	-21	apt-get	23:40:15	0
2860857	99	70	56,10	cyclictest	54	-21	kswapd0	19:20:21	0
2860857	99	70	38,29	cyclictest	2879996	-21	latency_hist	20:25:02	0
2860857	99	70	38,29	cyclictest	2879996	-21	latency_hist	20:25:01	0
2860857	99	70	37,30	cyclictest	2984059	-21	systemd	22:57:15	0
2860857	99	70	35,32	cyclictest	0	-21	swapper/0	22:15:26	0
2860857	99	69	64,3	cyclictest	2971167	-21	kworker/u4:3+events_unbound	23:07:19	0
2860857	99	69	60,6	cyclictest	2864711	-21	kworker/u4:19+events_unbound	19:46:49	0
2860857	99	69	60,6	cyclictest	2864711	-21	kworker/u4:19+events_unbound	19:46:48	0
2860857	99	69	37,28	cyclictest	2949513	-21	kworker/u4:1-rpciod	22:30:38	0
2860857	99	68	64,2	cyclictest	3047585	-21	kworker/u4:5+events_unbound	00:33:34	0
2860857	99	68	4,20	cyclictest	2886267	-21	modprobe	20:50:00	0
2860857	99	68	32,34	cyclictest	2873224	-21	cat	19:55:33	0
2860857	99	68	29,37	cyclictest	2871599	-21	gltestperf	19:50:20	0
2860857	99	67	8,20	cyclictest	2891332	-21	diskmemload	22:10:31	0
2860857	99	67	6,13	cyclictest	2952602	-21	ntpq	22:20:25	0
2860857	99	67	35,30	cyclictest	2969255	-21	df_inode	22:40:17	0
2860857	99	67	30,32	cyclictest	0	-21	swapper/0	00:25:12	0
2860858	99	66	4,54	cyclictest	2995322	-21	ssh	23:10:30	1
2860857	99	66	32,4	cyclictest	2931613	-21	unixbench-2d	21:55:37	0
2860857	99	66	32,32	cyclictest	3003223	-21	aten_r7power_po	23:20:17	0
2860857	99	66	32,31	cyclictest	2999447	-21	netstat	23:15:23	0
2860857	99	66	30,32	cyclictest	0	-21	swapper/0	23:10:17	0
2860857	99	66	24,4	cyclictest	0	-21	swapper/0	21:40:03	0
2860857	99	65	57,6	cyclictest	2888760	-21	kworker/u4:7+events_unbound	21:01:59	0
2860857	99	64	6,16	cyclictest	3054492	-21	ssh	00:20:25	0
2860857	99	64	28,5	cyclictest	0	-21	swapper/0	21:15:33	0
2860857	99	64	2,18	cyclictest	2935148	-21	fschecks_time	22:00:20	0
2860857	99	63	5,14	cyclictest	2980300	-21	sshd	22:53:05	0
2860857	99	63	29,5	cyclictest	3033234	-21	fschecks_time	23:55:26	0
2860857	99	63	23,37	cyclictest	2860856	-21	cyclictest	20:10:00	0
2860857	99	62	27,5	cyclictest	0	-21	swapper/0	21:50:29	0
2860857	99	62	27,5	cyclictest	0	-21	swapper/0	21:50:28	0
2860857	99	62	26,6	cyclictest	0	-21	swapper/0	23:30:25	0
2860857	99	62	25,8	cyclictest	2860790	-21	kworker/u4:3+rpciod	19:15:15	0
2860857	99	62	25,6	cyclictest	0	-21	swapper/0	20:35:36	0
2860857	99	61	29,3	cyclictest	0	-21	swapper/0	23:55:01	0
2860857	99	61	27,5	cyclictest	2864711	-21	kworker/u4:19-rpciod	19:25:41	0
2860857	99	61	27,5	cyclictest	0	-21	swapper/0	23:00:31	0
2860857	99	61	26,5	cyclictest	0	-21	swapper/0	20:40:35	0
2860857	99	61	25,7	cyclictest	255	50	irq/23-42890000.ethernet	00:10:32	0
2860857	99	61	25,5	cyclictest	2880460	-21	fschecks_time	20:25:19	0
2860857	99	60	27,6	cyclictest	0	-21	swapper/0	21:35:19	0
2860857	99	60	26,5	cyclictest	0	-21	swapper/0	00:35:21	0
2860857	99	60	22,6	cyclictest	0	-21	swapper/0	20:05:00	0
2860858	99	59	49,8	cyclictest	2887496	-21	systemd	20:51:57	1
2860858	99	59	49,8	cyclictest	2887496	-21	systemd	20:51:56	1
2860858	99	58	44,12	cyclictest	54	-21	kswapd0	19:20:20	1
2860857	99	57	7,16	cyclictest	2939781	-21	ssh	22:05:26	0
2860858	99	54	47,5	cyclictest	2982073	-21	/usr/sbin/munin	22:55:20	1
2860858	99	54	46,6	cyclictest	3055517	-21	kworker/u4:7+events_unbound	00:23:28	1
2860857	99	54	43,7	cyclictest	2882468	-21	modprobe	20:35:00	0
2860858	99	53	45,6	cyclictest	0	-21	swapper/1	22:20:24	1
2860858	99	53	39,6	cyclictest	2863339	-21	kworker/u4:15+events_unbound	19:40:44	1
2860857	99	53	34,17	cyclictest	2922589	-21	ntp_kernel_pll_	21:45:28	0
2860858	99	52	45,5	cyclictest	3028972	-21	diskmemload	23:50:21	1
2860858	99	52	45,5	cyclictest	3013888	-21	kworker/u4:11+events_unbound	23:35:19	1
2860858	99	52	45,5	cyclictest	2905505	-21	/usr/sbin/munin	21:25:29	1
2860858	99	52	27,5	cyclictest	0	-21	swapper/1	23:40:19	1
2860858	99	51	41,7	cyclictest	3046026	-21	/usr/sbin/munin	00:10:21	1
2860858	99	51	19,20	cyclictest	0	-21	swapper/1	22:15:22	1
2860858	99	50	43,5	cyclictest	3007496	-21	aten_r7power_vo	23:25:18	1
2860858	99	50	43,5	cyclictest	2991486	-21	unixbench-2d	23:05:38	1
2860858	99	50	41,7	cyclictest	0	-21	swapper/1	23:55:18	1
2860858	99	50	41,6	cyclictest	3044054	-21	sd-accept	00:08:13	1
2860858	99	50	41,6	cyclictest	3037913	-21	ssh	00:00:36	1
2860858	99	49	42,5	cyclictest	0	-21	swapper/1	21:40:20	1
2860858	99	49	42,4	cyclictest	2917517	-21	apt-key	21:40:02	1
2860858	99	49	41,5	cyclictest	2881236	-21	idleruntime-cro	20:30:00	1
2860858	99	49	40,7	cyclictest	3062422	-21	df_abs	00:30:17	1
2860858	99	49	38,9	cyclictest	2977760	-21	df_abs	22:50:17	1
2860858	99	48	42,4	cyclictest	3066596	-21	cpu	00:35:17	1
2860858	99	48	35,11	cyclictest	2939974	-21	sh	22:05:36	1
2860857	99	48	38,7	cyclictest	2887505	-21	kworker/u4:1+events_unbound	21:00:00	0
2860858	99	47	41,4	cyclictest	2999130	-21	fschecks_count	23:15:19	1
2860858	99	47	40,5	cyclictest	2926908	-21	ldconfig	21:50:29	1
2860858	99	47	40,5	cyclictest	2926908	-21	ldconfig	21:50:28	1
2860858	99	47	39,5	cyclictest	3050733	-21	/usr/sbin/munin	00:15:39	1
2860858	99	47	39,5	cyclictest	0	-21	swapper/1	21:20:24	1
2860857	99	47	37,7	cyclictest	2869690	-21	unixbench_singl	19:40:34	0
2860857	99	47	33,11	cyclictest	3043316	-21	kworker/u4:2-rpciod	00:15:22	0
2860857	99	47	25,19	cyclictest	0	-21	swapper/0	20:50:35	0
2860857	99	47	25,19	cyclictest	0	-21	swapper/0	20:50:34	0
2860858	99	46	39,5	cyclictest	2926005	-21	latency_hist	21:50:01	1
2860858	99	46	36,7	cyclictest	534	-21	in:imuxsock	22:04:04	1
2860857	99	46	40,4	cyclictest	2906010	-21	unixbench_singl	21:25:37	0
2860857	99	46	37,7	cyclictest	3045142	-21	munin-run	00:10:00	0
2860858	99	45	39,4	cyclictest	3009540	-21	kworker/u4:1+events_unbound	23:47:33	1
2860858	99	45	38,5	cyclictest	3000872	-21	kworker/u4:2+events_unbound	23:24:43	1
2860858	99	45	38,5	cyclictest	2862074	-21	kworker/u4:12+events_unbound	19:15:01	1
2860858	99	45	37,6	cyclictest	2895744	-21	latency_hist	21:15:02	1
2860858	99	45	37,4	cyclictest	2907193	-21	kworker/u4:10-rpciod	21:30:26	1
2860858	99	45	36,7	cyclictest	2885393	-21	df_abs	20:45:16	1
2860858	99	45	36,7	cyclictest	2871086	-21	latency_hist	19:50:02	1
2860858	99	45	36,7	cyclictest	2871086	-21	latency_hist	19:50:01	1
2860858	99	45	35,7	cyclictest	2987189	-21	timerwakeupswit	23:00:36	1
2860858	99	45	34,8	cyclictest	0	-21	swapper/1	22:35:19	1
2860858	99	44	38,4	cyclictest	2977347	-21	sed	22:50:01	1
2860858	99	44	37,4	cyclictest	2868512	-21	ls	19:39:59	1
2860858	99	44	34,6	cyclictest	0	-21	swapper/1	21:55:29	1
2860858	99	44	13,4	cyclictest	27	1	ktimers/1	22:30:30	1
2860857	99	44	33,9	cyclictest	2868535	-21	idleruntime-cro	19:40:00	0
2860857	99	44	23,18	cyclictest	2877427	-21	latency_hist	20:15:00	0
2860858	99	43	34,6	cyclictest	37	-21	kcompactd0	00:25:14	1
2860858	99	43	34,6	cyclictest	0	-21	swapper/1	20:00:46	1
2860858	99	43	14,5	cyclictest	27	1	ktimers/1	22:10:30	1
2860857	99	43	34,7	cyclictest	2866168	-21	aten2__	19:30:15	0
2860857	99	43	32,8	cyclictest	2973469	-21	df	22:45:17	0
2860858	99	42	32,8	cyclictest	2878092	-21	kernelversion	20:15:22	1
2860858	99	42	31,8	cyclictest	2876155	-21	cron	20:09:59	1
2860858	99	41	34,5	cyclictest	2891455	-21	latency_hist	21:10:02	1
2860858	99	41	33,6	cyclictest	2866423	-21	fschecks_count	19:30:20	1
2860858	99	41	33,6	cyclictest	0	-21	swapper/1	21:00:22	1
2860858	99	41	32,7	cyclictest	2884019	-21	aten_r7power_po	20:40:15	1
2860858	99	41	32,7	cyclictest	2872730	-21	fschecks_count	19:55:19	1
2860858	99	41	31,8	cyclictest	2956443	-21	df_abs	22:25:17	1
2860858	99	41	25,12	cyclictest	0	-21	swapper/1	19:50:17	1
2860857	99	41	33,6	cyclictest	0	-21	swapper/0	20:20:01	0
2860858	99	40	31,6	cyclictest	0	-21	swapper/1	21:20:01	1
2860858	99	40	12,3	cyclictest	27	1	ktimers/1	23:30:19	1
2860858	99	40	11,6	cyclictest	27	1	ktimers/1	22:40:29	1
2860858	99	39	33,4	cyclictest	0	-21	swapper/1	19:25:43	1
2860858	99	39	30,6	cyclictest	0	-21	swapper/1	20:35:00	1
2860858	99	37	28,6	cyclictest	0	-21	swapper/1	19:10:01	1
2860858	99	36	27,6	cyclictest	0	-21	swapper/1	20:35:19	1
2860858	99	35	24,8	cyclictest	0	-21	swapper/1	20:55:15	1
2860857	99	35	27,6	cyclictest	0	-21	swapper/0	19:10:02	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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