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 Wed Mar 25, 2026 00:44:08)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2723340	99	100	92,6	cyclictest	2884411	-21	kworker/u4:3+events_unbound	23:40:15	1
2723339	99	84	40,9	cyclictest	0	-21	swapper/0	00:10:33	0
2723339	99	80	73,5	cyclictest	53	-21	kswapd0	22:25:13	0
2723339	99	75	66,7	cyclictest	2858168	-21	kworker/u4:1+events_unbound	23:15:01	0
2723340	99	73	65,6	cyclictest	2853690	-21	kworker/u4:10+events_unbound	23:32:10	1
2723339	99	73	66,5	cyclictest	2888856	-21	kworker/u4:8+events_unbound	23:42:12	0
2723339	99	71	64,5	cyclictest	2867161	-21	kworker/u4:4+events_unbound	23:22:07	0
2723339	99	71	62,7	cyclictest	2853694	-21	kworker/u4:13+events_unbound	23:27:09	0
2723340	99	69	60,6	cyclictest	2742554	-21	kworker/u4:5+events_unbound	20:45:01	1
2723339	99	69	60,6	cyclictest	2928073	-21	kworker/u4:3+events_unbound	00:32:22	0
2723340	99	66	58,6	cyclictest	2778927	-21	kworker/u4:1+events_unbound	21:50:12	1
2723339	99	65	57,6	cyclictest	2849178	-21	kworker/u4:7+events_unbound	23:07:04	0
2723340	99	63	53,7	cyclictest	2723338	-21	cyclictest	22:48:36	1
2723339	99	63	55,6	cyclictest	53	-21	kswapd0	22:20:00	0
2723340	99	62	52,8	cyclictest	2727132	-21	systemd	19:21:20	1
2723340	99	60	52,6	cyclictest	2511487	-21	kworker/u4:7+events_unbound	19:46:25	1
2723340	99	59	49,7	cyclictest	0	-21	swapper/1	22:25:15	1
2723340	99	58	50,6	cyclictest	2774460	-21	kworker/u4:7+events_unbound	21:35:14	1
2723340	99	58	49,6	cyclictest	2736060	-21	kworker/u4:0+events_unbound	20:16:31	1
2723339	99	58	44,6	cyclictest	2778927	-21	kworker/u4:1+events_unbound	21:40:02	0
2723339	99	56	35,18	cyclictest	2760251	-21	unixbench-2d	21:15:49	0
2723340	99	55	40,10	cyclictest	37	-21	kcompactd0	21:58:38	1
2723339	99	55	48,5	cyclictest	2938699	-21	cron	00:40:00	0
2723339	99	55	47,5	cyclictest	2830936	-21	sh	22:35:42	0
2723339	99	55	45,8	cyclictest	2921290	-21	ssh	00:20:00	0
2723339	99	55	37,16	cyclictest	2768233	-21	gltestperf	21:25:20	0
2723340	99	54	45,6	cyclictest	2900536	-21	sh	23:55:31	1
2723340	99	54	45,6	cyclictest	2736060	-21	kworker/u4:0+events_unbound	20:05:01	1
2723339	99	54	46,5	cyclictest	2778930	-21	kworker/u4:4+events_unbound	22:11:53	0
2723340	99	53	45,6	cyclictest	2808435	-21	diskmemload	22:10:39	1
2723340	99	53	43,8	cyclictest	2798981	-21	df_abs	22:00:16	1
2723340	99	53	43,7	cyclictest	2747667	-21	kworker/u4:11+events_unbound	20:46:37	1
2723340	99	53	41,8	cyclictest	2734410	-21	ps	19:50:35	1
2723339	99	53	46,5	cyclictest	2729687	-21	kworker/u4:10+events_unbound	20:06:28	0
2723339	99	53	46,4	cyclictest	2728416	-21	kworker/u4:5+events_unbound	19:30:01	0
2723340	99	52	44,5	cyclictest	2917846	-21	/usr/sbin/munin	00:15:24	1
2723339	99	52	44,6	cyclictest	2748942	-21	kworker/u4:6+events_unbound	21:31:48	0
2723339	99	52	44,6	cyclictest	2709132	-21	kworker/u4:2+events_unbound	20:11:29	0
2723339	99	52	40,8	cyclictest	0	-21	swapper/0	23:35:37	0
2723340	99	51	45,4	cyclictest	53	-21	kswapd0	22:40:00	1
2723340	99	51	44,5	cyclictest	2851977	-21	/usr/sbin/munin	23:00:20	1
2723340	99	51	43,6	cyclictest	2834973	-21	mailstats	22:40:38	1
2723340	99	51	43,6	cyclictest	2723268	-21	kworker/u4:5+events_unbound	19:11:19	1
2723340	99	51	40,8	cyclictest	2752488	-21	ps	21:00:39	1
2723339	99	51	43,6	cyclictest	2803220	-21	wget	22:05:17	0
2723339	99	51	43,6	cyclictest	2734784	-21	kworker/u4:1+events_unbound	20:41:35	0
2723340	99	50	44,4	cyclictest	2759625	-21	kernelversion	21:15:31	1
2723340	99	50	43,5	cyclictest	2750785	-21	fschecks_time	20:55:28	1
2723340	99	50	41,7	cyclictest	2809667	-21	kworker/u4:1+events_unbound	22:16:08	1
2723339	99	50	43,5	cyclictest	2823151	-21	kworker/u4:6+events_unbound	22:58:00	0
2723339	99	50	43,5	cyclictest	2723338	-21	cyclictest	22:00:23	0
2723339	99	50	40,7	cyclictest	2725847	-21	kworker/u4:15+events_unbound	19:26:22	0
2723339	99	50	33,15	cyclictest	2908867	-21	fschecks_time	00:05:20	0
2723340	99	49	42,5	cyclictest	2868958	-21	latency_hist	23:20:01	1
2723340	99	49	42,5	cyclictest	2823153	-21	kworker/u4:9+events_unbound	22:52:58	1
2723340	99	49	38,9	cyclictest	2891909	-21	diskmemload	23:45:32	1
2723339	99	49	42,5	cyclictest	2767504	-21	latency_hist	21:25:00	0
2723339	99	49	40,6	cyclictest	0	-21	swapper/0	21:40:38	0
2723339	99	49	33,14	cyclictest	2826398	-21	unixbench-2d	22:30:39	0
2723339	99	49	28,18	cyclictest	0	-21	swapper/0	23:30:37	0
2723339	99	49	2,42	cyclictest	2843455	-21	ntpq	22:50:30	0
2723340	99	48	43,4	cyclictest	2723338	-21	cyclictest	21:26:46	1
2723340	99	48	41,5	cyclictest	2849174	-21	kworker/u4:2+events_unbound	22:58:59	1
2723340	99	48	39,7	cyclictest	315	-21	systemd-journal	00:32:23	1
2723340	99	48	38,6	cyclictest	0	-21	swapper/1	23:10:25	1
2723340	99	48	37,9	cyclictest	2909319	-21	ntp_offset	00:05:31	1
2723340	99	48	28,14	cyclictest	2916921	-21	modprobe	00:15:01	1
2723339	99	48	41,5	cyclictest	2820614	-21	latency_hist	22:25:02	0
2723339	99	48	40,6	cyclictest	2725831	-21	kworker/u4:12+events_unbound	19:56:25	0
2723339	99	48	39,7	cyclictest	2745128	-21	sh	20:35:01	0
2723339	99	48	37,9	cyclictest	2834029	-21	aten2__	22:40:15	0
2723339	99	48	2,39	cyclictest	2891639	-21	irqstats	23:45:21	0
2723340	99	47	41,4	cyclictest	2803250	-21	aten_r7power_cu	22:05:17	1
2723340	99	47	40,5	cyclictest	2925685	-21	munin-run	00:25:00	1
2723340	99	47	38,6	cyclictest	2754574	-21	aten_r7power_en	21:10:17	1
2723340	99	47	38,6	cyclictest	0	-21	swapper/1	00:35:33	1
2723340	99	47	37,7	cyclictest	2883550	-21	unixbench-2d	23:35:40	1
2723340	99	47	29,7	cyclictest	17	1	rcu_preempt	19:40:01	1
2723340	99	47	29,7	cyclictest	17	1	rcu_preempt	19:40:00	1
2723339	99	47	38,7	cyclictest	2795345	-21	sh	21:55:38	0
2723340	99	46	5,25	cyclictest	2896183	-21	ssh	23:50:28	1
2723340	99	46	39,5	cyclictest	2825547	-21	fschecks_time	22:30:20	1
2723340	99	46	38,5	cyclictest	2754155	-21	modprobe	21:10:00	1
2723340	99	46	37,7	cyclictest	371	-21	systemd-timesyn	23:22:40	1
2723340	99	46	37,7	cyclictest	2736048	-21	systemd	19:56:25	1
2723340	99	46	36,8	cyclictest	2787587	-21	systemd	21:46:48	1
2723339	99	46	38,6	cyclictest	2743773	-21	unixbench_singl	20:25:37	0
2723339	99	46	38,6	cyclictest	0	-21	swapper/0	23:55:39	0
2723339	99	46	37,7	cyclictest	2904496	-21	fschecks_time	00:00:17	0
2723339	99	46	37,7	cyclictest	2896003	-21	/usr/sbin/munin	23:50:22	0
2723339	99	46	36,7	cyclictest	2790873	-21	/usr/sbin/munin	21:50:37	0
2723339	99	46	34,10	cyclictest	2922525	-21	/usr/sbin/munin	00:20:37	0
2723340	99	45	38,5	cyclictest	2853690	-21	kworker/u4:10+events_unbound	23:08:58	1
2723340	99	45	38,5	cyclictest	2817449	-21	threads	22:20:38	1
2723340	99	45	34,7	cyclictest	0	-21	swapper/1	21:40:37	1
2723339	99	45	39,4	cyclictest	2726817	-21	cat	19:20:36	0
2723339	99	45	36,7	cyclictest	2839582	-21	unixbench-2d	22:45:39	0
2723339	99	45	35,7	cyclictest	0	-21	swapper/0	21:11:48	0
2723339	99	45	34,8	cyclictest	2748229	-21	gltestperf	20:45:20	0
2723340	99	44	37,5	cyclictest	2772753	-21	gltestperf	21:30:20	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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