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 Fri Mar 20, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1360579	2	96	0,1	sleep7	1360580	-21	sh	12:30:52	7
624687	99	63	60,2	cyclictest	1242052	-21	kworker/u16:0+events_unbound	12:23:40	4
624687	99	63	60,2	cyclictest	1242052	-21	kworker/u16:0+events_unbound	12:23:40	4
624694	99	60	58,2	cyclictest	1299894	-21	kworker/u16:2+events_unbound	12:18:56	6
624358	2	57	47,7	sleep5	0	-21	swapper/5	07:02:58	5
624099	2	56	46,7	sleep6	0	-21	swapper/6	06:59:14	6
624698	99	54	50,2	cyclictest	1122884	-21	perl	10:53:40	7
624319	2	53	43,7	sleep4	0	-21	swapper/4	07:02:25	4
624694	99	52	49,2	cyclictest	986393	-21	kworker/u16:2+events_unbound	11:33:40	6
624687	99	52	50,2	cyclictest	799801	-21	kworker/u16:3+events_unbound	11:49:00	4
624694	99	50	48,2	cyclictest	586822	-21	kworker/u16:2+events_unbound	07:08:52	6
624687	99	49	47,2	cyclictest	986393	-21	kworker/u16:2+flush-8:0	10:53:55	4
624687	99	49	47,2	cyclictest	1242052	-21	kworker/u16:0+flush-8:0	12:03:41	4
624687	99	49	46,2	cyclictest	986393	-21	kworker/u16:2+events_unbound	11:13:40	4
624694	99	48	46,2	cyclictest	1060027	-21	kworker/u16:5+events_unbound	10:58:59	6
624687	99	48	45,2	cyclictest	1060027	-21	kworker/u16:5+events_unbound	11:38:43	4
624687	99	48	45,2	cyclictest	1060027	-21	kworker/u16:5+events_unbound	11:38:43	4
624692	99	47	44,2	cyclictest	1060027	-21	kworker/u16:5+events_unbound	11:18:53	5
624687	99	47	45,2	cyclictest	799801	-21	kworker/u16:3+flush-8:0	12:28:51	4
624687	99	47	44,2	cyclictest	1299894	-21	kworker/u16:2+events_unbound	12:18:39	4
624692	99	46	44,2	cyclictest	1060027	-21	kworker/u16:5+flush-8:0	11:38:54	5
624692	99	46	44,2	cyclictest	1060027	-21	kworker/u16:5+flush-8:0	11:38:54	5
624692	99	46	43,2	cyclictest	1242052	-21	kworker/u16:0+events_unbound	11:58:31	5
624694	99	45	43,2	cyclictest	1060027	-21	kworker/u16:5+events_unbound	11:43:58	6
624694	99	45	42,2	cyclictest	1060027	-21	kworker/u16:5+events_unbound	11:48:41	6
624687	99	45	43,2	cyclictest	799801	-21	kworker/u16:3+events_unbound	12:14:31	4
624698	99	44	0,42	cyclictest	124	-21	kswapd0	10:25:27	7
624692	99	44	42,2	cyclictest	799801	-21	kworker/u16:3+events_unbound	12:17:52	5
624687	99	44	43,1	cyclictest	799801	-21	kworker/u16:3+events_unbound	11:36:07	4
624687	99	44	42,2	cyclictest	1060027	-21	kworker/u16:5+events_unbound	11:23:42	4
624687	99	44	42,2	cyclictest	1060027	-21	kworker/u16:5+events_unbound	10:33:27	4
624694	99	43	41,1	cyclictest	799801	-21	kworker/u16:3+events_unbound	10:43:28	6
624692	99	43	41,2	cyclictest	986393	-21	kworker/u16:2+flush-8:0	10:14:07	5
624692	99	43	41,2	cyclictest	799801	-21	kworker/u16:3+events_unbound	12:05:59	5
624692	99	43	41,2	cyclictest	799801	-21	kworker/u16:3+events_unbound	11:37:31	5
624692	99	43	41,2	cyclictest	799801	-21	kworker/u16:3+events_unbound	09:08:28	5
624687	99	43	41,2	cyclictest	986393	-21	kworker/u16:2+events_unbound	09:54:27	4
624687	99	43	41,2	cyclictest	1287652	-21	kworker/u16:1+events_unbound	12:02:12	4
624694	99	42	39,2	cyclictest	799801	-21	kworker/u16:3+events_unbound	11:03:28	6
624694	99	42	39,2	cyclictest	1060027	-21	kworker/u16:5+events_unbound	11:28:39	6
624692	99	42	40,2	cyclictest	799801	-21	kworker/u16:3+flush-8:0	11:53:57	5
624687	99	42	40,2	cyclictest	986393	-21	kworker/u16:2+events_unbound	10:42:28	4
624687	99	42	40,2	cyclictest	799801	-21	kworker/u16:3+events_unbound	11:54:23	4
624687	99	42	40,2	cyclictest	799801	-21	kworker/u16:3+events_unbound	10:27:31	4
624687	99	42	40,2	cyclictest	799801	-21	kworker/u16:3+events_unbound	09:47:56	4
624687	99	42	40,2	cyclictest	799801	-21	kworker/u16:3+events_unbound	09:47:56	4
624687	99	42	40,2	cyclictest	1242052	-21	kworker/u16:0+events_unbound	12:10:15	4
624694	99	41	40,1	cyclictest	1060027	-21	kworker/u16:5+events_unbound	10:50:40	6
624694	99	41	39,2	cyclictest	858705	-21	kworker/u16:4+events_unbound	09:30:56	6
624694	99	41	39,2	cyclictest	799801	-21	kworker/u16:3+events_unbound	10:26:11	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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