OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #0, slot #2

Click here to display the system's profile data or here to proceed to next system.

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.
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 rack0slot2.osadl.org (updated Sun Aug 30, 2026 00:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2936851	2	60	49,8	sleep4	0	-21	swapper/4	19:08:40	4
2936786	2	55	20,30	sleep7	0	-21	swapper/7	19:07:47	7
2936641	2	54	43,8	sleep5	0	-21	swapper/5	19:05:45	5
2937226	99	46	40,5	cyclictest	3018837	-21	latency_hist	19:49:46	7
2936874	2	45	22,8	sleep6	0	-21	swapper/6	19:08:59	6
2937226	99	41	35,5	cyclictest	3096796	-21	latency_hist	20:29:47	7
2937226	99	41	0,39	cyclictest	648	-21	systemd-journal	22:34:46	7
2937226	99	38	32,5	cyclictest	3155133	-21	latency_hist	20:59:47	7
2937226	99	35	30,4	cyclictest	3357680	-21	latency_hist	22:24:46	7
2937213	99	33	29,4	cyclictest	2969991	-21	kworker/u16:3+flush-8:0	19:29:47	5
2937226	99	32	26,5	cyclictest	3345483	-21	latency_hist	22:19:46	7
2937213	99	31	29,2	cyclictest	3490101	-21	kworker/u16:1+flush-8:0	00:25:02	5
2937213	99	31	28,2	cyclictest	3116050	-21	kworker/u16:1+events_unbound	20:45:01	5
2937213	99	27	24,2	cyclictest	3552436	-21	kworker/u16:2+events_unbound	00:24:46	5
2937213	99	26	24,2	cyclictest	3477763	-21	kworker/u16:0+events_unbound	23:24:46	5
2937213	99	25	23,2	cyclictest	3539042	-21	kworker/u16:0+events_unbound	23:40:09	5
2937213	99	25	23,2	cyclictest	3126388	-21	kworker/u16:0+events_unbound	21:30:01	5
2937213	99	24	23,1	cyclictest	3268227	-21	kworker/u16:0+flush-8:0	21:59:47	5
2937213	99	24	21,2	cyclictest	3154910	-21	kworker/u16:3+flush-8:0	21:10:04	5
2937213	99	22	20,2	cyclictest	2969991	-21	kworker/u16:3+events_unbound	19:35:09	5
2937226	99	21	20,0	cyclictest	0	-21	swapper/7	19:40:02	7
2937226	99	21	18,2	cyclictest	3125228	-21	smart_sda	20:40:12	7
2937226	99	21	15,5	cyclictest	3675124	-21	latency_hist	00:34:46	7
2937226	99	20	17,2	cyclictest	3638599	-21	sed	00:19:46	7
2937213	99	20	18,2	cyclictest	3382586	-21	kworker/u16:0+events_unbound	22:45:02	5
2937213	99	20	15,5	cyclictest	3416561	-21	kworker/u16:2+flush-8:0	23:14:46	5
2937210	99	20	17,2	cyclictest	3490101	-21	kworker/u16:1+flush-8:0	00:10:48	4
2937226	99	19	0,18	cyclictest	3391209	-21	ssh	22:35:09	7
2937222	99	19	15,3	cyclictest	3285785	-21	cat	21:55:02	6
2937213	99	19	17,2	cyclictest	3382586	-21	kworker/u16:0+flush-8:0	22:35:10	5
2937210	99	19	17,2	cyclictest	3552436	-21	kworker/u16:2+flush-8:0	23:54:51	4
2937226	99	18	12,5	cyclictest	3211291	-21	latency_hist	21:24:46	7
2937213	99	18	16,2	cyclictest	3565393	-21	kworker/u16:3+events_unbound	00:09:41	5
2937213	99	18	16,2	cyclictest	3552436	-21	kworker/u16:2+events_unbound	00:15:14	5
2937226	99	17	14,2	cyclictest	1277	-21	snmpd	21:53:48	7
2937226	99	17	13,3	cyclictest	1277	-21	snmpd	23:20:38	7
2937226	99	17	11,5	cyclictest	3028562	-21	latency_hist	19:54:46	7
2937213	99	17	15,2	cyclictest	3416561	-21	kworker/u16:2+events_unbound	22:59:59	5
2937213	99	17	15,2	cyclictest	3382586	-21	kworker/u16:0+events_unbound	22:50:15	5
2937226	99	16	11,4	cyclictest	3406516	-21	latency_hist	22:44:46	7
2937226	99	16	10,5	cyclictest	3145406	-21	latency_hist	20:54:47	7
2937222	99	16	11,4	cyclictest	3371177	-21	cat	22:30:01	6
2937213	99	16	0,15	cyclictest	3619003	-21	kthreadcore	00:10:03	5
2937226	99	15	9,5	cyclictest	3135725	-21	latency_hist	20:49:46	7
2937222	99	15	0,1	cyclictest	0	-21	swapper/6	22:35:09	6
2937222	99	15	0,1	cyclictest	0	-21	swapper/6	00:30:05	6
2937213	99	15	0,1	cyclictest	0	-21	swapper/5	20:40:09	5
2937213	99	15	0,15	cyclictest	0	-21	swapper/5	23:49:05	5
2937210	99	15	14,1	cyclictest	0	-21	swapper/4	23:07:36	4
2937210	99	15	0,15	cyclictest	0	-21	swapper/4	21:10:56	4
2937226	99	14	0,1	cyclictest	0	-21	swapper/7	23:10:08	7
2937226	99	14	0,1	cyclictest	0	-21	swapper/7	23:00:09	7
2937226	99	14	0,13	cyclictest	1277	-21	snmpd	23:15:29	7
2937226	99	14	0,13	cyclictest	0	-21	swapper/7	22:50:11	7
2937226	99	14	0,13	cyclictest	0	-21	swapper/7	20:35:07	7
2937226	99	14	0,12	cyclictest	0	-21	swapper/7	23:59:58	7
2937222	99	14	13,1	cyclictest	0	-21	swapper/6	23:11:34	6
2937222	99	14	13,1	cyclictest	0	-21	swapper/6	22:20:20	6
2937222	99	14	13,1	cyclictest	0	-21	swapper/6	00:15:06	6
2937222	99	14	0,1	cyclictest	0	-21	swapper/6	22:07:05	6
2937222	99	14	0,1	cyclictest	0	-21	swapper/6	21:35:12	6
2937222	99	14	0,1	cyclictest	0	-21	swapper/6	21:29:34	6
2937222	99	14	0,1	cyclictest	0	-21	swapper/6	21:29:34	6
2937222	99	14	0,1	cyclictest	0	-21	swapper/6	00:11:10	6
2937222	99	14	0,1	cyclictest	0	-21	swapper/6	00:08:48	6
2937213	99	14	12,2	cyclictest	3225202	-21	kworker/u16:3+flush-8:0	21:50:03	5
2937213	99	14	12,2	cyclictest	3086946	-21	kworker/u16:1+events_unbound	20:25:01	5
2937213	99	14	0,1	cyclictest	0	-21	swapper/5	23:29:32	5
2937213	99	14	0,1	cyclictest	0	-21	swapper/5	23:16:46	5
2937213	99	14	0,14	cyclictest	0	-21	swapper/5	22:30:44	5
2937213	99	14	0,14	cyclictest	0	-21	swapper/5	22:09:27	5
2937213	99	14	0,14	cyclictest	0	-21	swapper/5	21:15:51	5
2937210	99	14	13,1	cyclictest	0	-21	swapper/4	23:24:00	4
2937210	99	14	13,1	cyclictest	0	-21	swapper/4	00:33:03	4
2937210	99	14	0,1	cyclictest	0	-21	swapper/4	22:22:40	4
2937210	99	14	0,1	cyclictest	0	-21	swapper/4	22:06:35	4
2937210	99	14	0,1	cyclictest	0	-21	swapper/4	21:54:55	4
2937210	99	14	0,14	cyclictest	0	-21	swapper/4	23:44:48	4
2937226	99	13	9,3	cyclictest	1277	-21	snmpd	21:44:50	7
2937226	99	13	9,3	cyclictest	1277	-21	snmpd	21:34:08	7
2937226	99	13	9,3	cyclictest	1277	-21	snmpd	20:22:25	7
2937226	99	13	9,3	cyclictest	1277	-21	snmpd	00:21:12	7
2937226	99	13	7,5	cyclictest	648	-21	systemd-journal	22:59:46	7
2937226	99	13	6,6	cyclictest	6175	-21	gvfs-afc-volume	19:30:15	7
2937226	99	13	12,0	cyclictest	0	-21	swapper/7	19:15:02	7
2937226	99	13	10,2	cyclictest	0	-21	swapper/7	23:35:07	7
2937222	99	13	12,1	cyclictest	0	-21	swapper/6	23:37:06	6
2937222	99	13	12,1	cyclictest	0	-21	swapper/6	23:18:21	6
2937222	99	13	12,1	cyclictest	0	-21	swapper/6	23:05:35	6
2937222	99	13	12,1	cyclictest	0	-21	swapper/6	21:15:32	6
2937222	99	13	10,2	cyclictest	3341528	-21	cut	22:15:08	6
2937222	99	13	0,13	cyclictest	0	-21	swapper/6	22:11:30	6
2937222	99	13	0,0	cyclictest	0	-21	swapper/6	23:56:11	6
2937213	99	13	9,3	cyclictest	3010258	-21	cat	19:45:02	5
2937213	99	13	12,1	cyclictest	0	-21	swapper/5	23:59:48	5
2937213	99	13	12,1	cyclictest	0	-21	swapper/5	23:04:47	5
2937213	99	13	12,1	cyclictest	0	-21	swapper/5	22:21:54	5
2937213	99	13	12,1	cyclictest	0	-21	swapper/5	22:17:29	5
2937213	99	13	11,2	cyclictest	3416561	-21	kworker/u16:2+flush-8:0	23:35:17	5
2937213	99	13	11,2	cyclictest	3000554	-21	kworker/u16:2+flush-8:0	19:44:42	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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