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 Jun 25, 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
2787933	99	117	99,8	cyclictest	2857110	-21	kworker/u4:4+events_unbound	22:40:45	0
2787933	99	109	90,10	cyclictest	2888632	-21	kworker/u4:13+events_unbound	22:45:45	0
2787933	99	104	93,7	cyclictest	53	-21	kswapd0	21:50:34	0
2787934	99	103	96,4	cyclictest	0	-21	swapper/1	23:30:34	1
2787933	99	97	87,7	cyclictest	2914868	-21	kworker/u4:7+events_unbound	23:00:46	0
2787934	99	95	56,7	cyclictest	2820444	-21	switchtime	21:10:38	1
2787934	99	93	87,3	cyclictest	2794368	-21	kworker/u4:4+events_unbound	20:35:17	1
2787934	99	91	82,6	cyclictest	2794367	-21	kworker/u4:1+events_unbound	19:34:59	1
2787934	99	90	81,7	cyclictest	2888630	-21	kworker/u4:11+events_unbound	22:55:46	1
2787934	99	90	81,7	cyclictest	2888630	-21	kworker/u4:11+events_unbound	22:55:45	1
2787933	99	85	60,6	cyclictest	2857110	-21	kworker/u4:4+events_unbound	22:20:01	0
2787933	99	83	76,5	cyclictest	2879644	-21	kworker/u4:7+events_unbound	22:35:43	0
2787934	99	81	74,5	cyclictest	2949963	-21	kworker/u4:4+events_unbound	23:40:55	1
2787934	99	80	73,5	cyclictest	2879644	-21	kworker/u4:7+events_unbound	22:30:42	1
2787933	99	80	72,6	cyclictest	2967744	-21	kworker/u4:11+events_unbound	23:57:32	0
2787934	99	79	67,9	cyclictest	2817729	-21	kworker/u4:13+events_unbound	21:25:26	1
2787933	99	79	71,6	cyclictest	2797027	-21	kworker/u4:15+events_unbound	20:00:07	0
2787933	99	79	69,6	cyclictest	2947838	-21	apt-get	23:35:13	0
2787933	99	79	69,6	cyclictest	2947838	-21	apt-get	23:35:12	0
2787933	99	78	64,5	cyclictest	2798388	-21	kworker/u4:6+events_unbound	20:30:16	0
2787934	99	75	54,6	cyclictest	2866225	-21	kworker/u4:10+events_unbound	22:05:38	1
2787933	99	74	59,5	cyclictest	2954403	-21	kworker/u4:2+events_unbound	23:55:02	0
2787934	99	71	64,5	cyclictest	2941047	-21	kworker/u4:15+events_unbound	23:40:00	1
2787934	99	71	64,5	cyclictest	2941047	-21	kworker/u4:15+events_unbound	23:40:00	1
2787933	99	71	62,6	cyclictest	2984672	-21	kworker/u4:5+events_unbound	00:17:00	0
2787933	99	71	58,11	cyclictest	53	-21	kswapd0	22:25:01	0
2787933	99	70	61,7	cyclictest	2789244	-21	kworker/u4:9+events_unbound	19:25:02	0
2787934	99	69	61,6	cyclictest	2794368	-21	kworker/u4:4+events_unbound	21:20:26	1
2787934	99	68	62,4	cyclictest	2794368	-21	kworker/u4:4+events_unbound	21:10:01	1
2787934	99	68	61,5	cyclictest	53	-21	kswapd0	22:00:01	1
2787933	99	68	28,36	cyclictest	2802343	-21	apt-get	20:05:09	0
2787934	99	67	58,7	cyclictest	2844173	-21	kworker/u4:5+events_unbound	21:40:28	1
2787933	99	67	59,6	cyclictest	2949962	-21	kworker/u4:3+events_unbound	23:46:56	0
2787933	99	67	55,9	cyclictest	53	-21	kswapd0	22:00:10	0
2787933	99	67	51,12	cyclictest	0	-21	swapper/0	00:00:15	0
2787933	99	66	55,9	cyclictest	2789243	-21	kworker/u4:8+events_unbound	19:45:13	0
2787933	99	64	56,6	cyclictest	2799745	-21	kworker/u4:11+events_unbound	19:55:01	0
2787933	99	64	53,7	cyclictest	2798383	-21	kworker/u4:0+events_unbound	21:20:02	0
2787934	99	62	52,6	cyclictest	2914866	-21	kworker/u4:5+events_unbound	23:05:00	1
2787934	99	62	47,9	cyclictest	0	-21	swapper/1	00:00:39	1
2787933	99	62	50,6	cyclictest	53	-21	kswapd0	22:30:14	0
2787933	99	62	40,19	cyclictest	53	-21	kswapd0	00:30:09	0
2787934	99	61	54,5	cyclictest	2817728	-21	kworker/u4:12+events_unbound	21:15:03	1
2787934	99	61	54,5	cyclictest	2817728	-21	kworker/u4:12+events_unbound	21:15:02	1
2787934	99	61	54,5	cyclictest	2799745	-21	kworker/u4:11+events_unbound	20:20:16	1
2787934	99	59	49,7	cyclictest	2886322	-21	aten_r7power_en	22:25:16	1
2787933	99	59	52,5	cyclictest	2954403	-21	kworker/u4:2+events_unbound	00:20:05	0
2787934	99	58	52,4	cyclictest	2798388	-21	kworker/u4:6+events_unbound	20:10:00	1
2787933	99	58	50,6	cyclictest	2928287	-21	kworker/u4:9+events_unbound	23:22:45	0
2787934	99	57	50,5	cyclictest	2798389	-21	kworker/u4:7+events_unbound	21:00:24	1
2787934	99	57	42,5	cyclictest	2888633	-21	kworker/u4:14+events_unbound	22:36:59	1
2787933	99	57	45,7	cyclictest	2824667	-21	sh	21:15:34	0
2787933	99	57	45,7	cyclictest	2824667	-21	sh	21:15:34	0
2787933	99	56	8,31	cyclictest	2952957	-21	ssh	23:40:32	0
2787933	99	56	38,15	cyclictest	2991648	-21	fschecks_count	00:25:20	0
2787934	99	55	48,5	cyclictest	2787860	-21	kworker/u4:5+events_unbound	19:14:58	1
2787934	99	55	27,8	cyclictest	2954403	-21	kworker/u4:2+events_unbound	00:30:04	1
2787933	99	55	9,39	cyclictest	0	-21	swapper/0	19:35:05	0
2787933	99	55	48,5	cyclictest	2931558	-21	/usr/sbin/munin	23:15:40	0
2787933	99	55	44,8	cyclictest	2787932	-21	cyclictest	22:56:58	0
2787933	99	55	44,8	cyclictest	2787932	-21	cyclictest	22:56:57	0
2787933	99	55	42,6	cyclictest	2958225	-21	kworker/u4:9+events_unbound	00:07:59	0
2787933	99	55	40,10	cyclictest	2860013	-21	ssh	21:55:20	0
2787933	99	55	14,34	cyclictest	256	50	irq/23-42890000.ethernet	19:10:06	0
2787934	99	54	47,5	cyclictest	2878425	-21	mailstats	22:15:40	1
2787934	99	54	47,5	cyclictest	2779475	-21	kworker/u4:14+events_unbound	19:10:01	1
2787933	99	54	45,7	cyclictest	378	-21	dbus-daemon	20:55:21	0
2787933	99	54	3,49	cyclictest	0	-21	swapper/0	20:35:34	0
2787934	99	53	47,4	cyclictest	2789243	-21	kworker/u4:8+events_unbound	19:45:01	1
2787934	99	53	44,7	cyclictest	317	-21	systemd-journal	22:40:42	1
2787934	99	53	40,5	cyclictest	2799746	-21	kworker/u4:12+events_unbound	20:45:21	1
2787933	99	53	44,6	cyclictest	2787932	-21	cyclictest	21:28:36	0
2787933	99	53	42,8	cyclictest	2886499	-21	/usr/sbin/munin	22:25:19	0
2787934	99	52	38,11	cyclictest	2798388	-21	kworker/u4:6+events_unbound	20:30:25	1
2787933	99	52	41,5	cyclictest	2798386	-21	kworker/u4:3+events_unbound	20:25:16	0
2787934	99	51	44,5	cyclictest	2974924	-21	sendmail_mailqu	00:05:36	1
2787934	99	51	44,5	cyclictest	2851779	-21	sendmail_mailqu	21:45:44	1
2787934	99	51	44,4	cyclictest	37	-21	kcompactd0	22:45:19	1
2787934	99	51	43,5	cyclictest	2868411	-21	latency_hist	22:05:01	1
2787933	99	51	8,31	cyclictest	2939744	-21	ssh	23:25:27	0
2787933	99	51	44,5	cyclictest	2815162	-21	kworker/u4:8+events_unbound	21:11:00	0
2787933	99	51	42,6	cyclictest	2804291	-21	gltestperf	20:10:21	0
2787933	99	51	33,6	cyclictest	2954404	-21	kworker/u4:5+events_unbound	00:11:33	0
2787934	99	50	43,5	cyclictest	2978800	-21	gltestperf	00:10:21	1
2787934	99	50	42,6	cyclictest	2797215	-21	sd-accept	19:45:03	1
2787934	99	50	41,7	cyclictest	2936086	-21	systemd	23:20:49	1
2787933	99	50	5,30	cyclictest	3000753	-21	ssh	00:35:33	0
2787933	99	50	4,37	cyclictest	2850445	-21	modprobe	21:45:00	0
2787933	99	50	40,6	cyclictest	0	-21	swapper/0	21:45:40	0
2787934	99	49	40,7	cyclictest	2837326	-21	aten2__	21:30:15	1
2787933	99	49	40,6	cyclictest	2807547	-21	munin-plugin-st	20:25:00	0
2787933	99	49	40,5	cyclictest	0	-21	swapper/0	23:30:52	0
2787933	99	49	39,8	cyclictest	53	-21	kswapd0	22:50:12	0
2787933	99	49	38,8	cyclictest	2794402	-21	idleruntime-cro	19:34:59	0
2787933	99	48	41,5	cyclictest	2789242	-21	kworker/u4:4+events_unbound	19:17:00	0
2787933	99	48	40,6	cyclictest	2914865	-21	kworker/u4:4+events_unbound	23:05:03	0
2787933	99	48	40,6	cyclictest	2839616	-21	kworker/u4:7+events_unbound	21:34:00	0
2787934	99	47	41,4	cyclictest	2798916	-21	fschecks_count	19:50:23	1
2787934	99	47	39,5	cyclictest	2925908	-21	aten_r7power_cu	23:10:16	1
2787933	99	47	41,4	cyclictest	15	1	ktimers/0	22:06:50	0
2787933	99	47	40,5	cyclictest	2873719	-21	/usr/sbin/munin	22:10:28	0
2787933	99	47	39,6	cyclictest	2844174	-21	kworker/u4:8+events_unbound	21:37:46	0
2787933	99	47	28,16	cyclictest	0	-21	swapper/0	23:10:30	0
2787934	99	46	39,5	cyclictest	2804213	-21	fschecks_time	20:10:19	1
2787934	99	46	38,6	cyclictest	2966548	-21	unixbench_multi	23:55:38	1
2787934	99	46	37,7	cyclictest	2957915	-21	unixbench_singl	23:45:41	1
2787933	99	46	37,6	cyclictest	2812903	-21	aten_r7power_po	20:45:16	0
2787933	99	46	35,7	cyclictest	2800268	-21	grep	19:55:19	0
2787934	99	45	39,4	cyclictest	2967108	-21	kworker/u4:0+events_unbound	00:15:59	1
2787934	99	45	38,5	cyclictest	2806254	-21	munin-run	20:20:01	1
2787934	99	45	36,7	cyclictest	2787932	-21	cyclictest	19:21:43	1
2787933	99	45	23,19	cyclictest	0	-21	swapper/0	19:25:34	0
2787934	99	44	38,4	cyclictest	0	-21	swapper/1	23:55:00	1
2787934	99	44	37,5	cyclictest	2793140	-21	idleruntime-cro	19:30:01	1
2787934	99	44	37,5	cyclictest	2790438	-21	unixbench_multi	19:15:38	1
2787934	99	44	35,7	cyclictest	2991682	-21	fschecks_time	00:25:22	1
2787934	99	44	35,6	cyclictest	2815161	-21	kworker/u4:5+events_unbound	20:55:21	1
2787934	99	44	35,6	cyclictest	2812775	-21	latency_hist	20:45:02	1
2787934	99	44	33,7	cyclictest	0	-21	swapper/1	23:15:23	1
2787933	99	44	37,5	cyclictest	2794368	-21	kworker/u4:4+events_unbound	21:09:59	0
2787933	99	44	36,6	cyclictest	2816917	-21	fschecks_count	21:00:18	0
2787934	99	43	37,4	cyclictest	2921399	-21	find	23:05:10	1
2787934	99	43	37,4	cyclictest	2879645	-21	kworker/u4:9-nfsiod	22:20:24	1
2787934	99	43	35,6	cyclictest	0	-21	swapper/1	22:50:44	1
2787934	99	43	34,7	cyclictest	2843030	-21	sed	21:35:40	1
2787934	99	43	34,7	cyclictest	0	-21	swapper/1	00:20:25	1
2787934	99	43	34,6	cyclictest	0	-21	swapper/1	23:25:14	1
2787934	99	43	33,7	cyclictest	2856046	-21	sh	21:50:33	1
2787933	99	43	35,6	cyclictest	2794368	-21	kworker/u4:4+events_unbound	20:17:01	0
2787934	99	42	37,4	cyclictest	2775549	-21	kworker/u4:3+events_unbound	19:35:01	1
2787934	99	42	36,4	cyclictest	3000454	-21	if_eth0	00:35:20	1
2787934	99	42	36,4	cyclictest	2801433	-21	df_abs	20:00:17	1
2787934	99	42	35,5	cyclictest	2814397	-21	fschecks_time	20:50:19	1
2787934	99	42	33,6	cyclictest	0	-21	swapper/1	22:10:33	1
2787933	99	42	35,5	cyclictest	2803669	-21	kworker/u4:18+events_unbound	20:40:21	0
2787933	99	41	30,7	cyclictest	0	-21	swapper/0	19:40:28	0
2787933	99	40	32,5	cyclictest	2798386	-21	kworker/u4:3-rpciod	20:50:39	0
2787934	99	39	32,5	cyclictest	2807974	-21	fschecks_count	20:25:17	1
2787934	99	39	30,6	cyclictest	0	-21	swapper/1	20:00:01	1
2787933	99	29	23,4	cyclictest	256	50	irq/23-42890000.ethernet	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