OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #3, slot #6

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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack3slot6.osadl.org (updated Thu Jul 02, 2026 12:45:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
25356	2	98	14,39	sleep0	0	-21	swapper/0	07:09:09	0
25575	99	95	77,13	cyclictest	26	-21	ksoftirqd/1	10:05:12	1
25049	2	95	18,31	sleep1	0	-21	swapper/1	07:06:23	1
25575	99	90	71,11	cyclictest	26	-21	ksoftirqd/1	08:00:12	1
25575	99	89	6,71	cyclictest	1785	-21	apt-get	10:35:12	1
25575	99	89	15,59	cyclictest	0	-21	swapper/1	08:20:14	1
25575	99	87	7,64	cyclictest	18153	-21	apt-get	09:50:13	1
25575	99	87	12,60	cyclictest	0	-21	swapper/1	12:35:14	1
25575	99	86	6,65	cyclictest	720	-21	apt-get	07:30:12	1
25575	99	86	16,58	cyclictest	0	-21	swapper/1	08:55:13	1
25575	99	86	14,60	cyclictest	0	-21	swapper/1	11:35:14	1
25575	99	86	14,57	cyclictest	0	-21	swapper/1	07:45:14	1
25575	99	85	6,67	cyclictest	10825	-21	apt-get	09:30:13	1
25575	99	85	6,67	cyclictest	10825	-21	apt-get	09:30:13	1
25575	99	85	21,50	cyclictest	0	-21	swapper/1	12:20:22	1
25575	99	85	18,53	cyclictest	0	-21	swapper/1	10:20:13	1
25575	99	85	14,59	cyclictest	0	-21	swapper/1	12:25:13	1
25575	99	85	13,56	cyclictest	0	-21	swapper/1	10:55:14	1
25575	99	84	7,61	cyclictest	29241	-21	apt-get	08:50:13	1
25575	99	84	17,55	cyclictest	0	-21	swapper/1	10:40:13	1
25575	99	84	15,55	cyclictest	0	-21	swapper/1	09:20:12	1
25575	99	84	14,56	cyclictest	0	-21	swapper/1	10:50:14	1
25575	99	84	13,58	cyclictest	0	-21	swapper/1	09:45:14	1
25575	99	84	13,57	cyclictest	0	-21	swapper/1	08:35:14	1
25575	99	84	13,56	cyclictest	0	-21	swapper/1	11:50:13	1
25575	99	83	6,67	cyclictest	30158	-21	apt-get	11:55:26	1
25575	99	83	6,60	cyclictest	21078	-21	apt-get	11:30:10	1
25575	99	83	13,60	cyclictest	0	-21	swapper/1	12:15:10	1
25575	99	83	11,59	cyclictest	0	-21	swapper/1	07:10:12	1
25575	99	82	9,65	cyclictest	3851	-21	taskset	09:10:14	1
25575	99	82	6,63	cyclictest	5341	-21	apt-get	10:45:13	1
25575	99	82	14,54	cyclictest	0	-21	swapper/1	07:50:13	1
25575	99	82	13,59	cyclictest	0	-21	swapper/1	11:00:12	1
25575	99	82	13,55	cyclictest	0	-21	swapper/1	12:05:13	1
25575	99	82	12,55	cyclictest	0	-21	swapper/1	10:15:16	1
25575	99	82	10,58	cyclictest	0	-21	swapper/1	08:40:13	1
25575	99	81	7,59	cyclictest	31919	-21	apt-get	12:00:11	1
25575	99	81	25,50	cyclictest	243	-21	systemd-journal	11:42:41	1
25575	99	81	16,51	cyclictest	0	-21	swapper/1	07:40:15	1
25575	99	81	13,58	cyclictest	0	-21	swapper/1	08:25:14	1
25575	99	81	12,56	cyclictest	0	-21	swapper/1	08:10:11	1
25569	99	81	33,40	cyclictest	23947	-21	apt-get	08:35:16	0
25575	99	80	7,58	cyclictest	9089	-21	apt-get	09:25:14	1
25575	99	80	6,62	cyclictest	17601	-21	apt-get	11:20:14	1
25575	99	80	6,11	cyclictest	0	-21	swapper/1	09:00:24	1
25575	99	80	16,53	cyclictest	0	-21	swapper/1	12:10:14	1
25575	99	80	15,55	cyclictest	0	-21	swapper/1	08:15:24	1
25575	99	80	14,59	cyclictest	0	-21	swapper/1	08:30:14	1
25575	99	80	13,55	cyclictest	0	-21	swapper/1	09:55:14	1
25575	99	80	13,55	cyclictest	0	-21	swapper/1	07:25:12	1
25575	99	80	12,54	cyclictest	0	-21	swapper/1	07:20:13	1
25575	99	80	11,59	cyclictest	0	-21	swapper/1	09:15:14	1
25569	99	80	9,41	cyclictest	0	-21	swapper/0	07:10:24	0
25569	99	80	9,12	cyclictest	0	-21	swapper/0	08:45:11	0
25575	99	79	7,58	cyclictest	21650	-21	apt-get	10:00:11	1
25575	99	79	7,57	cyclictest	14103	-21	apt-get	11:10:14	1
25575	99	79	7,56	cyclictest	13130	-21	apt-get	08:05:12	1
25575	99	79	7,56	cyclictest	13130	-21	apt-get	08:05:12	1
25575	99	79	18,48	cyclictest	0	-21	swapper/1	07:55:11	1
25575	99	79	17,51	cyclictest	0	-21	swapper/1	11:05:14	1
25575	99	79	17,51	cyclictest	0	-21	swapper/1	11:05:14	1
25575	99	79	13,53	cyclictest	0	-21	swapper/1	10:10:11	1
25575	99	78	7,56	cyclictest	2465	-21	apt-get	07:35:12	1
25575	99	78	7,55	cyclictest	15837	-21	apt-get	11:15:12	1
25575	99	78	6,60	cyclictest	12568	-21	apt-get	09:35:12	1
25575	99	78	22,47	cyclictest	1018	-21	sort	10:30:34	1
25575	99	77	7,57	cyclictest	26379	-21	apt-get	11:45:11	1
25575	99	77	6,56	cyclictest	10310	-21	apt-get	12:30:12	1
25575	99	77	5,66	cyclictest	0	-21	swapper/1	09:45:01	1
25575	99	77	23,45	cyclictest	457	-21	dbus-daemon	11:30:00	1
25575	99	77	23,45	cyclictest	457	-21	dbus-daemon	11:30:00	1
25575	99	77	21,49	cyclictest	0	-21	swapper/1	07:15:11	1
25569	99	76	26,44	cyclictest	0	-21	swapper/0	07:45:12	0
25575	99	75	7,54	cyclictest	2052	-21	apt-get	09:05:12	1
25575	99	75	7,54	cyclictest	2052	-21	apt-get	09:05:12	1
25575	99	75	6,56	cyclictest	30729	-21	apt-get	10:25:13	1
25575	99	74	6,53	cyclictest	27503	-21	apt-get	08:45:13	1
25569	99	73	5,56	cyclictest	5585	-21	apt-get	09:15:14	0
25569	99	69	40,13	cyclictest	30981	-21	apt-get	08:55:13	0
25569	99	69	39,18	cyclictest	22821	-21	apt-get	11:35:14	0
25569	99	67	41,16	cyclictest	18728	-21	apt-get	08:20:14	0
25569	99	67	39,16	cyclictest	3597	-21	apt-get	10:40:13	0
25569	99	67	36,16	cyclictest	29673	-21	apt-get	07:20:13	0
25569	99	66	5,51	cyclictest	7894	-21	apt-get	07:50:14	0
25569	99	66	39,13	cyclictest	4758	-21	apt-get	12:15:10	0
25569	99	66	36,16	cyclictest	16961	-21	apt-get	08:15:24	0
25569	99	66	36,14	cyclictest	22206	-21	apt-get	08:30:14	0
25569	99	65	9,14	cyclictest	15	1	rcu_preempt	07:40:00	0
25569	99	65	4,19	cyclictest	20468	-21	apt-get	08:25:13	0
25569	99	65	38,17	cyclictest	12052	-21	apt-get	12:35:14	0
25569	99	65	35,21	cyclictest	32740	-21	apt-get	09:00:14	0
25569	99	64	39,16	cyclictest	11391	-21	apt-get	08:00:12	0
25569	99	64	39,13	cyclictest	8571	-21	apt-get	12:25:13	0
25569	99	64	38,16	cyclictest	28992	-21	apt-get	10:20:13	0
25569	99	64	37,17	cyclictest	28117	-21	apt-get	11:50:13	0
25569	99	64	37,15	cyclictest	6829	-21	apt-get	12:20:23	0
25569	99	64	37,13	cyclictest	10572	-21	apt-get	11:00:12	0
25569	99	64	35,19	cyclictest	16422	-21	apt-get	09:45:14	0
25569	99	64	33,17	cyclictest	7345	-21	apt-get	09:20:13	0
25569	99	64	22,37	cyclictest	26201	-21	cron	11:45:00	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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