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 Fri Jan 02, 2026 12:44:11)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2506950	99	117	98,16	cyclictest	54	-21	kswapd0	11:40:11	0
2506950	99	117	98,16	cyclictest	54	-21	kswapd0	11:40:10	0
2506950	99	86	77,7	cyclictest	2598921	-21	kworker/u4:5+events_unbound	10:30:18	0
2506950	99	80	38,5	cyclictest	2547125	-21	awk	09:20:35	0
2506950	99	80	27,50	cyclictest	0	-21	swapper/0	07:50:39	0
2506950	99	77	41,33	cyclictest	2568507	-21	unixbench-2d	09:45:39	0
2506950	99	74	39,5	cyclictest	2623780	-21	kworker/u4:11-rpciod	10:59:52	0
2506950	99	71	39,5	cyclictest	2648105	-21	unixbench_multi	11:20:40	0
2506950	99	71	39,5	cyclictest	2512487	-21	fschecks_time	07:30:22	0
2506951	99	70	40,28	cyclictest	2537890	-21	df_abs	09:10:19	1
2506950	99	70	38,5	cyclictest	2563427	-21	/usr/sbin/munin	09:40:19	0
2506950	99	70	38,5	cyclictest	2563427	-21	/usr/sbin/munin	09:40:18	0
2506950	99	70	33,10	cyclictest	2592636	-21	aten_r7power_cu	10:15:18	0
2506951	99	69	58,9	cyclictest	54	-21	kswapd0	11:40:13	1
2506951	99	69	58,9	cyclictest	54	-21	kswapd0	11:40:12	1
2506950	99	69	29,10	cyclictest	2509218	-21	sort	07:15:37	0
2506951	99	68	35,31	cyclictest	2551390	-21	processes	09:25:37	1
2506951	99	68	33,33	cyclictest	0	-21	swapper/1	12:00:31	1
2506951	99	67	60,5	cyclictest	2577605	-21	kworker/u4:13+events_unbound	10:04:42	1
2506951	99	67	60,5	cyclictest	2511963	-21	kworker/u4:12+events_unbound	08:15:02	1
2506951	99	67	41,24	cyclictest	2693166	-21	aten_r7power_vo	12:15:17	1
2506951	99	67	35,29	cyclictest	2507470	-21	gltestperf	07:10:20	1
2506951	99	67	33,30	cyclictest	0	-21	swapper/1	10:50:33	1
2506950	99	67	59,5	cyclictest	2565431	-21	kworker/u4:5+events_unbound	10:14:42	0
2506950	99	67	48,12	cyclictest	2652005	-21	grep	11:25:36	0
2506950	99	67	37,5	cyclictest	2689071	-21	df_abs	12:10:17	0
2506951	99	66	4,22	cyclictest	2660171	-21	ssh	11:35:28	1
2506951	99	66	42,22	cyclictest	2564385	-21	/usr/sbin/munin	09:40:41	1
2506951	99	66	42,22	cyclictest	2564385	-21	/usr/sbin/munin	09:40:40	1
2506951	99	66	40,22	cyclictest	0	-21	swapper/1	11:50:31	1
2506951	99	66	32,31	cyclictest	2525259	-21	gltestperf	08:20:23	1
2506950	99	66	59,4	cyclictest	54	-21	kswapd0	10:50:12	0
2506950	99	66	57,7	cyclictest	2628024	-21	kworker/u4:5+events_unbound	11:14:56	0
2506951	99	65	4,19	cyclictest	2593295	-21	ssh	10:15:30	1
2506951	99	65	31,30	cyclictest	2518348	-21	kworker/u4:11-rpciod	09:30:32	1
2506951	99	65	29,32	cyclictest	0	-21	swapper/1	07:10:02	1
2506951	99	64	32,29	cyclictest	0	-21	swapper/1	09:50:29	1
2506951	99	64	31,30	cyclictest	0	-21	swapper/1	10:45:28	1
2506951	99	64	29,32	cyclictest	2588588	-21	sh	10:10:17	1
2506951	99	64	29,32	cyclictest	0	-21	swapper/1	10:45:00	1
2506951	99	64	26,35	cyclictest	0	-21	swapper/1	11:20:20	1
2506950	99	64	26,12	cyclictest	2673176	-21	timerwakeupswit	11:50:38	0
2506951	99	63	39,21	cyclictest	2680285	-21	latency_hist	12:00:02	1
2506951	99	63	31,29	cyclictest	2527355	-21	latency_hist	08:30:02	1
2506951	99	63	26,34	cyclictest	0	-21	swapper/1	11:15:21	1
2506950	99	63	4,26	cyclictest	2643401	-21	rm	11:15:32	0
2506951	99	62	38,22	cyclictest	2706186	-21	ntp_kernel_err	12:30:25	1
2506951	99	62	27,32	cyclictest	0	-21	swapper/1	12:20:35	1
2506951	99	62	27,32	cyclictest	0	-21	swapper/1	07:35:01	1
2506951	99	62	26,32	cyclictest	0	-21	swapper/1	12:30:01	1
2506951	99	62	23,36	cyclictest	0	-21	swapper/1	11:12:01	1
2506951	99	61	30,28	cyclictest	0	-21	swapper/1	11:05:25	1
2506951	99	61	28,30	cyclictest	0	-21	swapper/1	09:45:27	1
2506951	99	61	27,31	cyclictest	0	-21	swapper/1	07:40:01	1
2506951	99	61	24,34	cyclictest	0	-21	swapper/1	12:05:24	1
2506950	99	61	52,7	cyclictest	2674261	-21	kworker/u4:3+events_unbound	11:55:04	0
2506951	99	60	32,26	cyclictest	2542421	-21	if_eth0	09:15:22	1
2506951	99	60	32,26	cyclictest	0	-21	swapper/1	12:35:22	1
2506951	99	60	3,15	cyclictest	2511624	-21	ps	07:25:33	1
2506951	99	60	26,31	cyclictest	0	-21	swapper/1	09:55:17	1
2506951	99	60	25,33	cyclictest	0	-21	swapper/1	10:30:01	1
2506950	99	60	52,6	cyclictest	2536031	-21	kworker/u4:9+events_unbound	09:14:32	0
2506951	99	59	4,10	cyclictest	2596713	-21	ssh	10:20:12	1
2506951	99	59	31,25	cyclictest	0	-21	swapper/1	11:25:37	1
2506951	99	59	26,30	cyclictest	0	-21	swapper/1	12:10:24	1
2506951	99	59	26,30	cyclictest	0	-21	swapper/1	10:35:23	1
2506951	99	59	25,31	cyclictest	0	-21	swapper/1	08:50:17	1
2506951	99	59	2,23	cyclictest	2584742	-21	memory	10:05:22	1
2506951	99	58	26,29	cyclictest	0	-21	swapper/1	11:45:37	1
2506951	99	58	26,29	cyclictest	0	-21	swapper/1	11:45:36	1
2506951	99	58	26,29	cyclictest	0	-21	swapper/1	11:30:37	1
2506951	99	58	25,30	cyclictest	0	-21	swapper/1	11:05:00	1
2506951	99	58	25,30	cyclictest	0	-21	swapper/1	10:55:28	1
2506951	99	58	25,30	cyclictest	0	-21	swapper/1	09:05:16	1
2506951	99	58	22,34	cyclictest	2529341	-21	proc_pri	08:35:31	1
2506951	99	57	28,26	cyclictest	0	-21	swapper/1	08:45:38	1
2506951	99	57	26,28	cyclictest	0	-21	swapper/1	09:00:00	1
2506951	99	57	20,7	cyclictest	2559286	-21	sh	09:35:18	1
2506951	99	57	20,6	cyclictest	2530988	-21	kworker/u4:17+rpciod	09:20:35	1
2506951	99	56	28,25	cyclictest	0	-21	swapper/1	08:15:38	1
2506951	99	56	25,28	cyclictest	0	-21	swapper/1	08:05:37	1
2506951	99	56	22,31	cyclictest	2510705	-21	kworker/u4:8-rpciod	07:45:01	1
2506951	99	55	24,28	cyclictest	0	-21	swapper/1	09:00:27	1
2506951	99	55	22,31	cyclictest	0	-21	swapper/1	10:30:16	1
2506951	99	54	25,26	cyclictest	0	-21	swapper/1	08:30:17	1
2506950	99	54	45,6	cyclictest	0	-21	swapper/0	09:50:37	0
2506951	99	53	25,25	cyclictest	0	-21	swapper/1	07:25:00	1
2506950	99	53	45,6	cyclictest	2628024	-21	kworker/u4:5+events_unbound	11:09:56	0
2506951	99	52	44,6	cyclictest	2506949	-21	cyclictest	07:15:29	1
2506951	99	52	23,26	cyclictest	0	-21	swapper/1	08:00:01	1
2506950	99	52	43,7	cyclictest	2607363	-21	kworker/u4:4+events_unbound	10:35:02	0
2506950	99	52	43,7	cyclictest	2561171	-21	kworker/u4:10+events_unbound	09:59:41	0
2506951	99	51	17,9	cyclictest	2520710	-21	timerwakeupswit	08:00:35	1
2506951	99	51	12,9	cyclictest	0	-21	swapper/1	08:40:29	1
2506950	99	51	44,5	cyclictest	2697581	-21	fschecks_time	12:20:20	0
2506950	99	51	41,6	cyclictest	2510706	-21	kworker/u4:9+events_unbound	08:00:01	0
2506950	99	51	28,8	cyclictest	2687054	-21	kworker/u4:6+rpciod	12:25:10	0
2506950	99	50	43,5	cyclictest	2710880	-21	unixbench_singl	12:35:39	0
2506950	99	50	42,5	cyclictest	0	-21	swapper/0	10:05:38	0
2506950	99	50	38,9	cyclictest	2537328	-21	diskmemload	10:00:22	0
2506950	99	49	43,4	cyclictest	2526431	-21	fschecks_time	08:25:18	0
2506950	99	49	40,6	cyclictest	2628024	-21	kworker/u4:5+events_unbound	11:30:11	0
2506950	99	49	40,6	cyclictest	0	-21	swapper/0	10:24:46	0
2506951	99	48	12,10	cyclictest	27	1	ktimers/1	07:50:19	1
2506950	99	48	29,16	cyclictest	2617996	-21	fschecks_time	10:45:20	0
2506950	99	47	39,6	cyclictest	2524356	-21	cat	08:15:39	0
2506950	99	47	38,7	cyclictest	2693149	-21	aten_r7power_po	12:15:18	0
2506950	99	47	27,17	cyclictest	0	-21	swapper/0	09:35:24	0
2506950	99	47	26,18	cyclictest	0	-21	swapper/0	09:10:00	0
2506950	99	46	39,5	cyclictest	2663467	-21	latency_hist	11:40:02	0
2506950	99	46	38,6	cyclictest	2535244	-21	fschecks_count	09:00:19	0
2506950	99	46	37,6	cyclictest	0	-21	swapper/0	09:25:16	0
2506950	99	46	36,7	cyclictest	2680628	-21	hostname	12:00:18	0
2506951	99	45	35,8	cyclictest	2517180	-21	latency_hist	07:50:00	1
2506950	99	45	38,5	cyclictest	2525968	-21	sh	08:25:01	0
2506950	99	45	36,6	cyclictest	2527477	-21	aten_r7power_en	08:30:14	0
2506950	99	45	36,6	cyclictest	0	-21	swapper/0	07:40:00	0
2506950	99	45	35,8	cyclictest	2543180	-21	head	09:15:39	0
2506950	99	45	35,8	cyclictest	2509934	-21	fschecks_count	07:20:19	0
2506950	99	45	34,8	cyclictest	2607362	-21	kworker/u4:3-rpciod	10:40:16	0
2506950	99	45	34,7	cyclictest	0	-21	swapper/0	11:00:37	0
2506950	99	44	37,5	cyclictest	2555856	-21	timerwakeupswit	09:30:42	0
2506950	99	44	35,7	cyclictest	2510706	-21	kworker/u4:9-rpciod	08:10:01	0
2506950	99	44	34,8	cyclictest	2531223	-21	aten_r7power_cu	08:45:16	0
2506950	99	44	34,8	cyclictest	2517204	-21	latency_hist	07:50:00	0
2506950	99	44	34,7	cyclictest	2532497	-21	aten_r7power_cu	08:50:16	0
2506950	99	43	34,6	cyclictest	0	-21	swapper/0	12:35:01	0
2506950	99	42	34,6	cyclictest	2528749	-21	aten_r7power_po	08:35:14	0
2506950	99	42	33,7	cyclictest	2522447	-21	aten_r7power_po	08:10:14	0
2506950	99	42	28,11	cyclictest	2534509	-21	ls	08:55:37	0
2506950	99	41	33,5	cyclictest	2598924	-21	kworker/u4:10-xprtiod	10:25:33	0
2506950	99	41	32,7	cyclictest	2514867	-21	aten_r7power_en	07:40:15	0
2506950	99	41	32,6	cyclictest	0	-21	swapper/0	12:05:14	0
2506950	99	41	31,7	cyclictest	0	-21	swapper/0	11:45:32	0
2506950	99	41	31,7	cyclictest	0	-21	swapper/0	11:45:31	0
2506950	99	41	28,6	cyclictest	0	-21	swapper/0	07:25:11	0
2506950	99	40	32,6	cyclictest	2490680	-21	kworker/u4:9+events_unbound	07:10:01	0
2506950	99	40	29,8	cyclictest	0	-21	swapper/0	07:10:17	0
2506950	99	39	30,7	cyclictest	2530175	-21	fschecks_count	08:40:18	0
2506950	99	38	26,9	cyclictest	0	-21	swapper/0	08:00:33	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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