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 Tue May 05, 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
3598924	2	75	0,1	sleep7	3598925	-21	ssh	00:21:39	7
2891858	2	47	37,7	sleep5	0	-21	swapper/5	19:06:54	5
2892270	99	44	42,2	cyclictest	3307003	-21	kworker/u16:0+flush-8:0	23:08:40	4
2892270	99	42	40,2	cyclictest	3107795	-21	kworker/u16:4+flush-8:0	21:29:12	4
2892270	99	40	38,2	cyclictest	3430368	-21	kworker/u16:1+events_unbound	23:33:39	4
2891722	2	39	5,29	sleep7	0	-21	swapper/7	19:05:03	7
2892277	99	36	0,34	cyclictest	3236109	-21	latency_hist	21:53:39	7
2892270	99	35	33,2	cyclictest	3369698	-21	kworker/u16:2+events_unbound	22:59:02	4
2892277	99	34	29,4	cyclictest	635	-21	systemd-journal	22:13:34	7
2892277	99	34	0,32	cyclictest	635	-21	systemd-journal	23:03:34	7
2892277	99	34	0,32	cyclictest	3624245	-21	updatedb	00:33:35	7
2892270	99	34	32,2	cyclictest	3107795	-21	kworker/u16:4+events_unbound	21:38:19	4
2892270	99	33	31,2	cyclictest	3502538	-21	kworker/u16:0+flush-8:0	00:09:08	4
2892270	99	33	31,2	cyclictest	3502538	-21	kworker/u16:0+flush-8:0	00:09:08	4
3322405	2	32	0,1	chrt	0	-21	swapper/6	22:28:54	6
2892270	99	32	30,2	cyclictest	3334973	-21	kworker/u16:4+events_unbound	23:56:52	4
2892277	99	31	30,0	cyclictest	0	-21	swapper/7	21:29:05	7
2892277	99	31	29,1	cyclictest	0	-21	swapper/7	21:34:03	7
2892270	99	31	28,2	cyclictest	3430368	-21	kworker/u16:1+events_unbound	23:41:50	4
2891757	2	31	20,8	sleep4	0	-21	swapper/4	19:05:32	4
2892277	99	30	25,4	cyclictest	3138997	-21	latency_hist	21:13:39	7
2892270	99	30	28,2	cyclictest	3573373	-21	kworker/u16:2+events_unbound	00:32:11	4
2892270	99	30	28,2	cyclictest	3430368	-21	kworker/u16:1+events_unbound	23:35:11	4
2892270	99	30	28,2	cyclictest	3334973	-21	kworker/u16:4+events_unbound	23:25:03	4
2892270	99	29	27,2	cyclictest	3246683	-21	kworker/u16:0+events_unbound	22:04:50	4
2892270	99	29	27,2	cyclictest	3107795	-21	kworker/u16:4+events_unbound	21:47:12	4
2892270	99	29	26,2	cyclictest	3430368	-21	kworker/u16:1+events_unbound	00:03:47	4
2892270	99	28	26,2	cyclictest	3430368	-21	kworker/u16:1+flush-8:0	23:46:55	4
2892270	99	28	26,2	cyclictest	3307003	-21	kworker/u16:0+events_unbound	22:29:35	4
2892270	99	27	25,2	cyclictest	3430368	-21	kworker/u16:1+flush-8:0	23:16:43	4
2892270	99	27	25,2	cyclictest	3077953	-21	kworker/u16:1+events_unbound	22:22:23	4
2892270	99	27	25,2	cyclictest	3077953	-21	kworker/u16:1+events_unbound	21:59:12	4
2892270	99	27	25,2	cyclictest	3077953	-21	kworker/u16:1+events_unbound	21:59:12	4
2892270	99	27	24,2	cyclictest	3334973	-21	kworker/u16:4+events_unbound	22:43:55	4
2892270	99	27	24,2	cyclictest	3334973	-21	kworker/u16:4+events_unbound	22:43:55	4
2892270	99	26	24,2	cyclictest	3107795	-21	kworker/u16:4+events_unbound	21:16:59	4
2892270	99	26	24,2	cyclictest	3077953	-21	kworker/u16:1+events_unbound	22:15:19	4
2892270	99	26	24,2	cyclictest	2188985	-21	kworker/u16:3+flush-8:0	19:24:02	4
2891683	2	26	16,7	sleep6	0	-21	swapper/6	19:04:30	6
2892277	99	25	21,3	cyclictest	635	-21	systemd-journal	21:48:35	7
2892270	99	25	23,2	cyclictest	3600162	-21	kworker/u16:4+events_unbound	00:28:12	4
2892270	99	25	23,2	cyclictest	3334973	-21	kworker/u16:4+events_unbound	22:49:49	4
2892270	99	25	23,2	cyclictest	3223993	-21	kworker/u16:2+events_unbound	21:53:39	4
2892277	99	24	19,4	cyclictest	3442453	-21	latency_hist	23:18:39	7
2892270	99	24	22,2	cyclictest	3502538	-21	kworker/u16:0+events_unbound	23:53:06	4
2892270	99	24	22,2	cyclictest	3430368	-21	kworker/u16:1+events_unbound	23:21:44	4
2892270	99	24	22,2	cyclictest	3077953	-21	kworker/u16:1+flush-8:0	22:40:32	4
2892270	99	24	22,2	cyclictest	3021180	-21	kworker/u16:0+events_unbound	21:10:40	4
2892270	99	23	21,2	cyclictest	3573373	-21	kworker/u16:2+events_unbound	00:20:14	4
2892270	99	23	21,2	cyclictest	3502538	-21	kworker/u16:0+flush-8:0	00:01:10	4
2892270	99	23	21,2	cyclictest	3430368	-21	kworker/u16:1+events_unbound	00:16:31	4
2892270	99	23	21,2	cyclictest	3369698	-21	kworker/u16:2+events_unbound	22:53:43	4
2892270	99	23	21,2	cyclictest	3107795	-21	kworker/u16:4+events_unbound	21:23:16	4
2892270	99	23	21,2	cyclictest	3021180	-21	kworker/u16:0+flush-8:0	21:28:35	4
2892270	99	23	21,2	cyclictest	2892014	-21	kworker/u16:1+flush-8:0	19:58:04	4
2892270	99	22	20,2	cyclictest	3599906	-21	kworker/u16:3+flush-8:0	00:36:15	4
2892270	99	22	20,2	cyclictest	3394003	-21	kworker/u16:3+events_unbound	23:12:56	4
2892270	99	22	20,2	cyclictest	3307003	-21	kworker/u16:0+events_unbound	22:36:35	4
2892270	99	22	20,2	cyclictest	3284695	-21	kworker/u16:3+flush-8:0	22:28:15	4
2892270	99	22	20,2	cyclictest	3246683	-21	kworker/u16:0+events_unbound	21:56:29	4
2892270	99	22	20,2	cyclictest	2892014	-21	kworker/u16:1+events_unbound	19:18:21	4
2892270	99	21	19,2	cyclictest	3246683	-21	kworker/u16:0+events_unbound	22:10:04	4
2892270	99	21	19,2	cyclictest	3107795	-21	kworker/u16:4+events_unbound	21:40:36	4
2892270	99	21	19,2	cyclictest	3040704	-21	kworker/u16:2+flush-8:0	20:38:34	4
2892270	99	21	19,2	cyclictest	2892014	-21	kworker/u16:1+events_unbound	19:53:36	4
2892270	99	21	19,2	cyclictest	2892014	-21	kworker/u16:1+events_unbound	19:53:36	4
2892270	99	21	0,20	cyclictest	0	-21	swapper/4	20:58:55	4
3476572	2	18	0,0	sleep7	3476573	-21	sh	23:29:30	7
2892277	99	18	15,2	cyclictest	1234	-21	snmpd	00:03:35	7
2892277	99	18	0,17	cyclictest	0	-21	swapper/7	21:59:06	7
2892277	99	18	0,17	cyclictest	0	-21	swapper/7	21:59:06	7
2892277	99	18	0,16	cyclictest	2972892	-21	latency_hist	19:48:40	7
2892271	99	18	13,4	cyclictest	3148000	-21	ntpq	21:14:04	5
2892277	99	17	12,4	cyclictest	3539499	-21	latency_hist	23:58:40	7
2892277	99	17	12,4	cyclictest	3490959	-21	latency_hist	23:38:39	7
2892273	99	17	14,2	cyclictest	3334973	-21	kworker/u16:4+flush-8:0	23:53:44	6
2892271	99	17	15,2	cyclictest	3077953	-21	kworker/u16:1+flush-8:0	21:07:32	5
2892271	99	17	15,2	cyclictest	2892014	-21	kworker/u16:1+events_unbound	19:13:54	5
2892277	99	16	15,0	cyclictest	0	-21	swapper/7	19:13:44	7
2892277	99	16	0,14	cyclictest	635	-21	systemd-journal	23:53:39	7
2892277	99	16	0,14	cyclictest	0	-21	swapper/7	19:54:03	7
2892271	99	16	12,1	cyclictest	0	-21	swapper/5	23:18:56	5
2892270	99	16	14,2	cyclictest	3040704	-21	kworker/u16:2+flush-8:0	20:49:07	4
2892270	99	16	14,2	cyclictest	3021180	-21	kworker/u16:0+events_unbound	20:54:05	4
2892277	99	15	7,7	cyclictest	6514	-21	gmain	19:39:59	7
2892277	99	15	7,7	cyclictest	5822	-21	gmain	20:08:59	7
2892277	99	15	12,2	cyclictest	0	-21	swapper/7	23:48:39	7
2892273	99	15	14,1	cyclictest	0	-21	swapper/6	22:18:33	6
2892273	99	15	13,2	cyclictest	3430368	-21	kworker/u16:1+flush-8:0	00:14:12	6
2892271	99	15	0,1	cyclictest	0	-21	swapper/5	22:56:39	5
2892271	99	15	0,14	cyclictest	3041722	-21	ps	20:23:56	5
2892270	99	15	12,2	cyclictest	2892014	-21	kworker/u16:1+events_unbound	19:08:43	4
2892277	99	14	9,4	cyclictest	1234	-21	snmpd	20:29:00	7
2892277	99	14	8,5	cyclictest	3098038	-21	latency_hist	20:53:40	7
2892277	99	14	13,0	cyclictest	0	-21	swapper/7	22:31:57	7
2892277	99	14	11,2	cyclictest	0	-21	swapper/7	00:13:39	7
2892277	99	14	0,1	cyclictest	0	-21	swapper/7	20:04:03	7
2892277	99	14	0,13	cyclictest	3126916	-21	diskmemload	22:37:46	7
2892273	99	14	12,2	cyclictest	2188985	-21	kworker/u16:3+events_unbound	19:28:55	6
2892271	99	14	13,1	cyclictest	0	-21	swapper/5	23:02:13	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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