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 Fri Feb 27, 2026 00:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4011873	2	58	48,7	sleep5	0	-21	swapper/5	19:01:04	5
4011845	2	53	43,7	sleep4	0	-21	swapper/4	19:00:39	4
4011865	2	46	36,7	sleep6	0	-21	swapper/6	19:00:57	6
4012455	99	43	40,2	cyclictest	902	-21	dbus-daemon	00:04:52	7
292330	2	42	0,0	sleep7	292329	-21	rm	22:42:13	7
4012442	99	41	35,5	cyclictest	245769	-21	kworker/u16:3+flush-8:0	00:34:52	4
4012455	99	40	38,1	cyclictest	52317	-21	diskmemload	22:45:06	7
4012455	99	40	0,38	cyclictest	4140486	-21	latency_hist	20:09:52	7
4010536	2	40	6,29	sleep7	0	-21	swapper/7	19:00:18	7
4012455	99	39	0,37	cyclictest	354061	-21	latency_hist	23:09:52	7
4012451	99	39	37,2	cyclictest	52556	-21	kworker/u16:2+flush-8:0	21:34:52	6
4012451	99	38	35,2	cyclictest	438845	-21	kworker/u16:0+flush-8:0	00:04:58	6
4012455	99	37	32,4	cyclictest	498785	-21	latency_hist	00:09:51	7
4012455	99	35	29,5	cyclictest	4073521	-21	latency_hist	19:34:53	7
4012446	99	35	33,2	cyclictest	161372	-21	kworker/u16:0+flush-8:0	22:05:18	5
4012446	99	35	31,3	cyclictest	198845	-21	kworker/u16:2+flush-8:0	23:30:07	5
4012451	99	34	31,2	cyclictest	198845	-21	kworker/u16:2+flush-8:0	22:39:52	6
4012442	99	32	28,3	cyclictest	171826	-21	kworker/u16:4+events_unbound	22:00:05	4
4012451	99	31	29,2	cyclictest	315633	-21	kworker/u16:0+flush-8:0	22:54:47	6
4012451	99	31	29,2	cyclictest	315633	-21	kworker/u16:0+flush-8:0	22:54:47	6
4012446	99	31	29,2	cyclictest	245769	-21	kworker/u16:3+flush-8:0	23:35:48	5
4012451	99	30	28,2	cyclictest	3939822	-21	kworker/u16:3+flush-8:0	19:14:52	6
382870	2	30	0,1	sleep6	0	-21	swapper/6	23:20:11	6
4012455	99	29	0,28	cyclictest	197098	-21	latency_hist	22:04:52	7
4012451	99	29	27,2	cyclictest	3974072	-21	kworker/u16:0+flush-8:0	19:09:48	6
4012451	99	29	26,2	cyclictest	198845	-21	kworker/u16:2+flush-8:0	23:14:58	6
4012451	99	29	25,3	cyclictest	4121392	-21	kworker/u16:3+events_unbound	20:10:17	6
4012451	99	29	25,3	cyclictest	4121392	-21	kworker/u16:3+events_unbound	20:10:17	6
4012451	99	28	26,2	cyclictest	486706	-21	kworker/u16:4+events_unbound	00:25:19	6
4012442	99	28	26,2	cyclictest	198845	-21	kworker/u16:2+flush-8:0	23:04:52	4
269589	2	28	0,1	chrt	269568	-21	perf	22:34:52	7
4012451	99	27	25,2	cyclictest	4178827	-21	kworker/u16:0+flush-8:0	21:09:52	6
4012451	99	27	24,3	cyclictest	342093	-21	kworker/u16:1+flush-8:0	23:25:08	6
4012451	99	27	24,2	cyclictest	4178827	-21	kworker/u16:0+events_unbound	21:25:14	6
4012451	99	26	24,2	cyclictest	4121392	-21	kworker/u16:3+events_unbound	20:15:16	6
4012451	99	26	24,2	cyclictest	4092326	-21	kworker/u16:1+events_unbound	19:50:15	6
4012451	99	26	24,2	cyclictest	245769	-21	kworker/u16:3+events_unbound	23:35:19	6
4012451	99	26	23,2	cyclictest	198845	-21	kworker/u16:2+events_unbound	22:25:04	6
4012446	99	26	24,2	cyclictest	172064	-21	kworker/u16:5+flush-8:0	22:10:07	5
4012446	99	26	24,2	cyclictest	172064	-21	kworker/u16:5+flush-8:0	22:10:07	5
4012446	99	26	24,2	cyclictest	161372	-21	kworker/u16:0+flush-8:0	22:20:17	5
4012451	99	25	22,2	cyclictest	4092326	-21	kworker/u16:1+flush-8:0	19:59:52	6
4012455	99	24	23,0	cyclictest	0	-21	swapper/7	00:19:56	7
4012455	99	24	19,4	cyclictest	4092644	-21	latency_hist	19:44:53	7
4012455	99	24	18,5	cyclictest	650	-21	systemd-journal	00:29:52	7
4012451	99	24	22,2	cyclictest	4034146	-21	kworker/u16:4+flush-8:0	19:15:19	6
4012451	99	24	22,2	cyclictest	198845	-21	kworker/u16:2+flush-8:0	23:04:52	6
262362	2	24	0,0	sleep6	0	-21	swapper/6	22:30:10	6
4012455	99	23	0,21	cyclictest	14007	-21	latency_hist	20:44:52	7
4012451	99	23	21,2	cyclictest	438845	-21	kworker/u16:0+events_unbound	00:15:15	6
4012451	99	22	19,2	cyclictest	4092326	-21	kworker/u16:1+flush-8:0	20:59:52	6
4012446	99	22	19,2	cyclictest	486706	-21	kworker/u16:4+events_unbound	00:20:05	5
4012455	99	21	15,5	cyclictest	4102240	-21	latency_hist	19:49:53	7
4012451	99	21	19,2	cyclictest	52556	-21	kworker/u16:2+flush-8:0	21:50:21	6
4012451	99	21	19,2	cyclictest	4092326	-21	kworker/u16:1+events_unbound	20:20:21	6
4012446	99	21	17,3	cyclictest	4121392	-21	kworker/u16:3+flush-8:0	20:40:18	5
4012446	99	21	17,3	cyclictest	198845	-21	kworker/u16:2+flush-8:0	22:14:57	5
4012451	99	20	18,2	cyclictest	4178827	-21	kworker/u16:0+flush-8:0	20:50:10	6
4012451	99	20	18,2	cyclictest	4121392	-21	kworker/u16:3+events_unbound	20:35:06	6
4012451	99	20	18,2	cyclictest	342093	-21	kworker/u16:1+flush-8:0	23:34:51	6
4012451	99	20	18,2	cyclictest	3312213	-21	kworker/u16:2+events_unbound	19:40:15	6
4012451	99	19	17,2	cyclictest	52556	-21	kworker/u16:2+events_unbound	21:35:14	6
4012451	99	19	17,2	cyclictest	3939822	-21	kworker/u16:3+events_unbound	19:20:11	6
4012451	99	19	17,2	cyclictest	245769	-21	kworker/u16:3+flush-8:0	23:14:47	6
4012451	99	19	16,2	cyclictest	161372	-21	kworker/u16:0+flush-8:0	22:19:58	6
4012451	99	19	15,3	cyclictest	3312213	-21	kworker/u16:2+flush-8:0	19:35:18	6
4012455	99	18	8,9	cyclictest	0	-21	swapper/7	23:20:08	7
4012455	99	18	8,9	cyclictest	0	-21	swapper/7	22:15:11	7
4012455	99	18	12,5	cyclictest	4021835	-21	latency_hist	19:09:52	7
4012451	99	18	16,2	cyclictest	4121392	-21	kworker/u16:3+flush-8:0	20:09:47	6
4012451	99	18	16,2	cyclictest	245769	-21	kworker/u16:3+flush-8:0	00:30:16	6
4012451	99	18	16,2	cyclictest	198845	-21	kworker/u16:2+flush-8:0	23:45:02	6
4012446	99	18	0,14	cyclictest	0	-21	swapper/5	23:00:14	5
4012455	99	17	8,8	cyclictest	0	-21	swapper/7	23:55:10	7
4012455	99	17	8,8	cyclictest	0	-21	swapper/7	23:15:11	7
4012455	99	17	14,2	cyclictest	1267	-21	snmpd	23:42:39	7
4012455	99	17	14,2	cyclictest	0	-21	swapper/7	00:09:52	7
4012455	99	17	12,4	cyclictest	4130910	-21	latency_hist	20:04:52	7
4012451	99	17	15,2	cyclictest	4092326	-21	kworker/u16:1+flush-8:0	20:30:20	6
4012446	99	17	15,2	cyclictest	4121392	-21	kworker/u16:3+flush-8:0	21:40:06	5
4012446	99	17	13,1	cyclictest	0	-21	swapper/5	00:26:40	5
4012446	99	17	0,14	cyclictest	0	-21	swapper/5	22:32:13	5
4012442	99	17	14,2	cyclictest	438845	-21	kworker/u16:0+flush-8:0	00:25:16	4
4012442	99	17	0,1	cyclictest	0	-21	swapper/4	21:00:28	4
4012442	99	17	0,1	cyclictest	0	-21	swapper/4	20:58:25	4
4012442	99	17	0,1	cyclictest	0	-21	swapper/4	20:45:06	4
4012442	99	17	0,1	cyclictest	0	-21	swapper/4	20:39:59	4
4012442	99	17	0,1	cyclictest	0	-21	swapper/4	20:36:55	4
4012442	99	17	0,1	cyclictest	0	-21	swapper/4	20:21:33	4
4012455	99	16	7,8	cyclictest	0	-21	swapper/7	23:10:13	7
4012455	99	16	0,14	cyclictest	523116	-21	cat	00:19:52	7
4012455	99	16	0,14	cyclictest	1267	-21	snmpd	21:04:47	7
4012455	99	16	0,14	cyclictest	109568	-21	ssh	21:25:16	7
4012451	99	16	14,2	cyclictest	4092326	-21	kworker/u16:1+flush-8:0	20:45:04	6
4012451	99	16	11,4	cyclictest	223163	-21	kthreadcore	22:15:08	6
4012446	99	16	13,2	cyclictest	4092326	-21	kworker/u16:1+flush-8:0	20:35:12	5
4012446	99	16	13,1	cyclictest	0	-21	swapper/5	23:50:25	5
4012446	99	16	0,2	cyclictest	346927	-21	tr	23:05:10	5
4012442	99	16	13,2	cyclictest	494322	-21	kthreadcore	00:05:13	4
4012442	99	16	0,1	cyclictest	0	-21	swapper/4	20:51:15	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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