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 50 highest latencies:

System rack0slot2.osadl.org (updated Thu Apr 02, 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
240711	2	64	54,7	sleep4	0	-21	swapper/4	07:00:29	4
241137	99	55	53,2	cyclictest	760194	-21	kworker/u16:3+events_unbound	11:25:44	4
240563	2	55	44,8	sleep6	0	-21	swapper/6	06:58:22	6
241137	99	53	51,2	cyclictest	798301	-21	kworker/u16:2+events_unbound	11:38:08	4
241137	99	53	50,2	cyclictest	530074	-21	kworker/u16:0+events_unbound	11:17:57	4
241140	99	52	50,2	cyclictest	920574	-21	kworker/u16:1+events_unbound	12:28:08	5
240573	2	52	42,7	sleep5	0	-21	swapper/5	06:58:29	5
241140	99	51	48,2	cyclictest	653136	-21	kworker/u16:2+flush-8:0	10:57:50	5
241140	99	50	47,2	cyclictest	598069	-21	kworker/u16:1+events_unbound	11:02:50	5
241140	99	50	47,2	cyclictest	531798	-21	kworker/u16:3+flush-8:0	10:32:49	5
241137	99	50	47,2	cyclictest	772362	-21	kworker/u16:1+flush-8:0	11:28:05	4
241137	99	50	47,2	cyclictest	653136	-21	kworker/u16:2+events_unbound	10:42:50	4
241140	99	49	47,2	cyclictest	817762	-21	kworker/u16:4+events_unbound	11:57:51	5
241142	99	48	45,2	cyclictest	530074	-21	kworker/u16:0+flush-8:0	10:17:35	6
241137	99	48	46,2	cyclictest	760194	-21	kworker/u16:3+flush-8:0	11:32:50	4
241137	99	48	46,2	cyclictest	480854	-21	kworker/u16:2+events_unbound	09:26:08	4
241140	99	47	45,2	cyclictest	530074	-21	kworker/u16:0+events_unbound	10:43:08	5
241140	99	47	45,2	cyclictest	530074	-21	kworker/u16:0+events_unbound	10:13:08	5
241137	99	47	45,2	cyclictest	598069	-21	kworker/u16:1+events_unbound	10:23:37	4
241137	99	47	44,2	cyclictest	653136	-21	kworker/u16:2+flush-8:0	10:47:52	4
241140	99	46	44,2	cyclictest	835497	-21	kworker/u16:2+events_unbound	12:25:16	5
241140	99	46	44,2	cyclictest	817762	-21	kworker/u16:4+flush-8:0	12:03:02	5
241140	99	46	43,2	cyclictest	835497	-21	kworker/u16:2+events_unbound	12:07:47	5
241146	99	45	0,43	cyclictest	650	-21	systemd-journal	09:02:35	7
241142	99	45	42,2	cyclictest	598069	-21	kworker/u16:1+flush-8:0	11:12:34	6
241140	99	45	43,2	cyclictest	760194	-21	kworker/u16:3+events_unbound	11:24:00	5
241140	99	45	43,2	cyclictest	598069	-21	kworker/u16:1+events_unbound	10:23:02	5
241137	99	45	43,2	cyclictest	772362	-21	kworker/u16:1+events_unbound	11:53:05	4
241137	99	45	43,2	cyclictest	772362	-21	kworker/u16:1+events_unbound	11:53:05	4
241137	99	45	43,2	cyclictest	480854	-21	kworker/u16:2+events_unbound	09:57:36	4
241137	99	45	42,2	cyclictest	772362	-21	kworker/u16:1+events_unbound	11:46:31	4
241146	99	44	39,4	cyclictest	519227	-21	latency_hist	09:42:35	7
241142	99	44	41,3	cyclictest	817762	-21	kworker/u16:4+flush-8:0	12:18:01	6
241140	99	44	42,2	cyclictest	798301	-21	kworker/u16:2+events_unbound	11:37:00	5
241140	99	44	42,2	cyclictest	784822	-21	kworker/u16:0+events_unbound	11:54:08	5
241140	99	44	42,2	cyclictest	784822	-21	kworker/u16:0+events_unbound	11:54:08	5
241140	99	44	42,2	cyclictest	653136	-21	kworker/u16:2+events_unbound	11:14:32	5
241140	99	44	42,2	cyclictest	653136	-21	kworker/u16:2+events_unbound	11:14:32	5
241137	99	44	42,2	cyclictest	495265	-21	kworker/u16:1+events_unbound	09:56:37	4
241140	99	43	41,2	cyclictest	835497	-21	kworker/u16:2+events_unbound	12:14:08	5
241140	99	43	41,2	cyclictest	480854	-21	kworker/u16:2+events_unbound	09:53:57	5
241140	99	43	41,2	cyclictest	364068	-21	kworker/u16:0+events_unbound	09:14:10	5
241146	99	42	0,40	cyclictest	266315	-21	sh	07:27:36	7
241140	99	42	40,2	cyclictest	817762	-21	kworker/u16:4+events_unbound	11:50:45	5
241140	99	42	40,2	cyclictest	772362	-21	kworker/u16:1+flush-8:0	11:37:59	5
241140	99	42	40,2	cyclictest	653136	-21	kworker/u16:2+events_unbound	10:49:40	5
241140	99	42	40,2	cyclictest	530074	-21	kworker/u16:0+events_unbound	11:20:25	5
241140	99	42	40,2	cyclictest	530074	-21	kworker/u16:0+events_unbound	11:09:09	5
241137	99	42	40,2	cyclictest	835497	-21	kworker/u16:2+events_unbound	12:21:12	4
241137	99	42	40,2	cyclictest	653136	-21	kworker/u16:2+events_unbound	10:52:56	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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