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 Mon Jul 27, 2026 12:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
199032	99	52	47,4	cyclictest	929715	-21	latency_hist	12:29:06	7
198497	2	46	35,8	sleep4	0	-21	swapper/4	07:05:48	4
198611	2	45	35,7	sleep5	0	-21	swapper/5	07:07:25	5
199032	99	43	39,2	cyclictest	608690	-21	munin-run	10:19:07	7
198576	2	43	3,34	sleep7	0	-21	swapper/7	07:06:55	7
199030	99	35	33,2	cyclictest	221860	-21	kworker/u16:1+flush-8:0	08:24:30	6
199032	99	34	33,0	cyclictest	0	-21	swapper/7	12:33:29	7
792084	2	33	0,1	chrt	435786	-21	diskmemload	11:30:57	7
199025	99	33	30,2	cyclictest	222167	-21	kworker/u16:2+events_unbound	08:34:22	5
199018	99	32	30,2	cyclictest	222194	-21	kworker/u16:5+events_unbound	07:29:27	4
199030	99	31	29,2	cyclictest	518726	-21	kworker/u16:0+events_unbound	09:44:30	6
198508	2	31	21,7	sleep6	0	-21	swapper/6	07:05:58	6
199032	99	30	29,0	cyclictest	0	-21	swapper/7	11:36:50	7
199032	99	30	29,0	cyclictest	0	-21	swapper/7	09:34:10	7
199032	99	30	28,1	cyclictest	719035	-21	ssh	11:02:38	7
199032	99	30	28,1	cyclictest	108	-21	kcompactd0	10:30:26	7
199032	99	30	28,1	cyclictest	0	-21	swapper/7	11:53:38	7
199032	99	30	25,4	cyclictest	744540	-21	latency_hist	11:14:06	7
199030	99	30	28,2	cyclictest	222167	-21	kworker/u16:2+events_unbound	08:39:25	6
199018	99	30	28,2	cyclictest	388087	-21	kworker/u16:4+events_unbound	08:44:34	4
199032	99	29	28,0	cyclictest	0	-21	swapper/7	12:36:58	7
199032	99	29	28,0	cyclictest	0	-21	swapper/7	12:36:58	7
199032	99	29	28,0	cyclictest	0	-21	swapper/7	12:09:09	7
199032	99	29	28,0	cyclictest	0	-21	swapper/7	11:18:38	7
199032	99	29	28,0	cyclictest	0	-21	swapper/7	10:24:10	7
199030	99	29	27,2	cyclictest	620434	-21	kworker/u16:2+flush-8:0	10:44:22	6
199030	99	29	27,2	cyclictest	518726	-21	kworker/u16:0+flush-8:0	09:54:34	6
199030	99	29	27,2	cyclictest	319719	-21	kworker/u16:3+events_unbound	08:09:31	6
199025	99	29	25,3	cyclictest	221860	-21	kworker/u16:1+flush-8:0	09:44:25	5
199032	99	28	27,0	cyclictest	0	-21	swapper/7	10:07:47	7
199032	99	28	26,1	cyclictest	545006	-21	ssh	09:50:43	7
199032	99	28	23,4	cyclictest	648	-21	systemd-journal	08:29:07	7
199032	99	27	26,0	cyclictest	0	-21	swapper/7	12:02:30	7
199032	99	27	26,0	cyclictest	0	-21	swapper/7	10:50:06	7
199032	99	27	26,0	cyclictest	0	-21	swapper/7	10:22:50	7
199032	99	27	25,1	cyclictest	484059	-21	ssh	09:27:06	7
199032	99	27	22,4	cyclictest	534620	-21	latency_hist	09:49:07	7
199018	99	27	25,2	cyclictest	581447	-21	kworker/u16:1+events_unbound	10:14:33	4
199032	99	26	24,1	cyclictest	0	-21	swapper/7	11:04:49	7
199032	99	26	23,1	cyclictest	915981	-21	ssh	12:21:45	7
199032	99	26	21,4	cyclictest	261182	-21	latency_hist	07:39:07	7
199018	99	26	24,2	cyclictest	251180	-21	kworker/u16:0+events_unbound	07:34:38	4
199018	99	26	24,2	cyclictest	222167	-21	kworker/u16:2+events_unbound	08:14:34	4
199032	99	25	24,0	cyclictest	0	-21	swapper/7	10:38:42	7
199030	99	25	23,2	cyclictest	388087	-21	kworker/u16:4+events_unbound	09:19:19	6
199030	99	25	23,2	cyclictest	222167	-21	kworker/u16:2+events_unbound	08:19:31	6
199018	99	25	23,2	cyclictest	877203	-21	kworker/u16:3+flush-8:0	12:14:01	4
199018	99	25	23,2	cyclictest	518726	-21	kworker/u16:0+flush-8:0	09:44:42	4
199032	99	24	23,0	cyclictest	0	-21	swapper/7	09:13:31	7
199030	99	24	22,2	cyclictest	388087	-21	kworker/u16:4+flush-8:0	08:54:07	6
199018	99	24	22,2	cyclictest	930105	-21	kworker/u16:4+events_unbound	12:34:33	4
199018	99	24	22,2	cyclictest	930105	-21	kworker/u16:4+events_unbound	12:34:33	4
199018	99	24	22,2	cyclictest	221860	-21	kworker/u16:1+flush-8:0	08:24:32	4
199018	99	23	21,2	cyclictest	817344	-21	kworker/u16:2+flush-8:0	12:04:28	4
199018	99	23	21,2	cyclictest	382581	-21	kworker/u16:3+flush-8:0	09:09:06	4
199018	99	23	21,2	cyclictest	222167	-21	kworker/u16:2+events_unbound	07:59:31	4
199018	99	23	20,2	cyclictest	319719	-21	kworker/u16:3+flush-8:0	08:29:21	4
199032	99	22	21,0	cyclictest	0	-21	swapper/7	11:48:49	7
199032	99	22	21,0	cyclictest	0	-21	swapper/7	11:22:46	7
199032	99	22	21,0	cyclictest	0	-21	swapper/7	10:10:31	7
199032	99	22	21,0	cyclictest	0	-21	swapper/7	09:54:38	7
199032	99	22	21,0	cyclictest	0	-21	swapper/7	09:22:03	7
199032	99	22	0,20	cyclictest	519861	-21	sh	09:39:56	7
199030	99	22	20,2	cyclictest	658255	-21	kworker/u16:4+events_unbound	10:49:30	6
199025	99	22	20,2	cyclictest	830332	-21	kworker/u16:1+flush-8:0	11:59:38	5
199018	99	22	20,2	cyclictest	594616	-21	kworker/u16:3+events_unbound	10:24:35	4
199032	99	21	20,0	cyclictest	0	-21	swapper/7	11:56:36	7
199032	99	21	20,0	cyclictest	0	-21	swapper/7	11:56:36	7
199032	99	21	20,0	cyclictest	0	-21	swapper/7	10:02:54	7
199032	99	21	20,0	cyclictest	0	-21	swapper/7	09:32:34	7
199032	99	21	20,0	cyclictest	0	-21	swapper/7	09:14:09	7
199032	99	21	17,3	cyclictest	1302	-21	snmpd	07:26:01	7
199032	99	21	15,5	cyclictest	426079	-21	latency_hist	09:04:07	7
199030	99	21	18,2	cyclictest	754693	-21	kworker/u16:1+flush-8:0	11:19:35	6
199018	99	21	20,1	cyclictest	518726	-21	kworker/u16:0+events_unbound	09:49:35	4
199018	99	21	18,2	cyclictest	844638	-21	kworker/u16:0+events_unbound	12:14:15	4
199030	99	20	18,2	cyclictest	261395	-21	kworker/u16:3+flush-8:0	07:39:22	6
199018	99	20	18,2	cyclictest	645697	-21	kworker/u16:3+events_unbound	10:34:35	4
199018	99	20	18,2	cyclictest	388087	-21	kworker/u16:4+flush-8:0	09:24:27	4
199018	99	20	17,2	cyclictest	729676	-21	kworker/u16:0+flush-8:0	11:09:07	4
199018	99	20	17,2	cyclictest	319719	-21	kworker/u16:3+events_unbound	08:09:21	4
199032	99	19	18,0	cyclictest	0	-21	swapper/7	12:06:50	7
199032	99	19	0,17	cyclictest	682838	-21	latency_hist	10:49:07	7
199030	99	19	17,2	cyclictest	769477	-21	kworker/u16:3+events_unbound	11:49:24	6
199030	99	19	14,1	cyclictest	86	-21	ksoftirqd/6	10:58:56	6
199018	99	19	17,2	cyclictest	769477	-21	kworker/u16:3+events_unbound	11:44:19	4
199018	99	19	17,2	cyclictest	691932	-21	kworker/u16:0+flush-8:0	10:54:43	4
199018	99	19	17,2	cyclictest	222167	-21	kworker/u16:2+flush-8:0	09:59:33	4
199018	99	19	17,2	cyclictest	196073	-21	kworker/u16:0+events_unbound	07:18:09	4
199018	99	19	16,2	cyclictest	803822	-21	kworker/u16:1+flush-8:0	11:39:13	4
199018	99	19	16,2	cyclictest	620434	-21	kworker/u16:2+events_unbound	11:29:17	4
199032	99	18	17,0	cyclictest	0	-21	swapper/7	11:26:34	7
199032	99	18	17,0	cyclictest	0	-21	swapper/7	08:36:26	7
199030	99	18	16,2	cyclictest	388087	-21	kworker/u16:4+flush-8:0	09:04:38	6
199030	99	18	16,2	cyclictest	222167	-21	kworker/u16:2+flush-8:0	09:00:42	6
199025	99	18	16,2	cyclictest	222167	-21	kworker/u16:2+events_unbound	09:34:22	5
199018	99	18	16,2	cyclictest	707238	-21	kworker/u16:1+flush-8:0	10:59:31	4
199018	99	18	16,2	cyclictest	382581	-21	kworker/u16:3+events_unbound	09:19:07	4
199018	99	18	16,2	cyclictest	222167	-21	kworker/u16:2+flush-8:0	08:19:22	4
199018	99	18	14,3	cyclictest	877203	-21	kworker/u16:3+flush-8:0	12:34:06	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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