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 Jun 05, 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
23093	2	95	0,0	sleep5	0	-21	swapper/5	09:41:34	5
165033	2	91	0,0	sleep5	0	-21	swapper/5	10:37:04	5
3897563	99	58	56,2	cyclictest	105314	-21	kworker/u16:2+events_unbound	11:37:05	4
3897567	99	57	54,2	cyclictest	276316	-21	kworker/u16:4+events_unbound	11:46:49	5
3897567	99	52	49,2	cyclictest	4032115	-21	kworker/u16:3+events_unbound	08:16:48	5
3897563	99	52	50,2	cyclictest	4064705	-21	kworker/u16:0+events_unbound	09:01:49	4
3897567	99	51	49,2	cyclictest	4666	-21	kworker/u16:4+flush-8:0	10:21:49	5
3897567	99	51	48,2	cyclictest	4026486	-21	kworker/u16:1+events_unbound	08:41:51	5
3897563	99	51	49,2	cyclictest	372715	-21	kworker/u16:3+events_unbound	12:27:05	4
3897563	99	51	49,2	cyclictest	105314	-21	kworker/u16:2+events_unbound	10:22:08	4
3897574	99	50	47,2	cyclictest	124	-21	kswapd0	08:01:49	7
3897563	99	50	48,2	cyclictest	276316	-21	kworker/u16:4+events_unbound	12:31:50	4
3897563	99	50	48,2	cyclictest	236839	-21	kworker/u16:0+flush-8:0	11:11:49	4
3897563	99	50	47,2	cyclictest	4064705	-21	kworker/u16:0+events_unbound	08:47:03	4
3897563	99	50	47,2	cyclictest	4064705	-21	kworker/u16:0+events_unbound	08:47:03	4
3897567	99	49	47,2	cyclictest	236839	-21	kworker/u16:0+events_unbound	11:12:04	5
3897567	99	49	46,2	cyclictest	34741	-21	kworker/u16:1+flush-8:0	10:46:48	5
3897563	99	48	46,2	cyclictest	4122193	-21	kworker/u16:3+events_unbound	09:12:10	4
3897563	99	48	46,2	cyclictest	4064705	-21	kworker/u16:0+events_unbound	09:37:07	4
3897567	99	47	45,2	cyclictest	4032115	-21	kworker/u16:3+flush-8:0	08:21:59	5
3897567	99	47	45,2	cyclictest	34741	-21	kworker/u16:1+flush-8:0	11:07:00	5
3897567	99	46	44,2	cyclictest	4074770	-21	kworker/u16:2+events_unbound	08:56:48	5
3897567	99	46	44,2	cyclictest	105314	-21	kworker/u16:2+events_unbound	10:31:48	5
3897563	99	46	44,2	cyclictest	4144597	-21	kworker/u16:2+events_unbound	09:17:07	4
3897171	2	46	36,7	sleep4	0	-21	swapper/4	07:05:16	4
3897567	99	45	43,2	cyclictest	236839	-21	kworker/u16:0+flush-8:0	11:17:03	5
3897567	99	45	42,2	cyclictest	276316	-21	kworker/u16:4+flush-8:0	12:01:50	5
3897567	99	45	42,2	cyclictest	276316	-21	kworker/u16:4+flush-8:0	12:01:50	5
3897563	99	45	43,2	cyclictest	105314	-21	kworker/u16:2+events_unbound	10:46:49	4
3897567	99	44	42,2	cyclictest	4144597	-21	kworker/u16:2+events_unbound	09:11:51	5
3897567	99	44	42,2	cyclictest	3929983	-21	kworker/u16:2+events_unbound	07:22:05	5
3897567	99	44	42,2	cyclictest	105314	-21	kworker/u16:2+events_unbound	12:12:06	5
3897563	99	44	42,2	cyclictest	4666	-21	kworker/u16:4+events_unbound	10:07:03	4
3897095	2	44	34,7	sleep5	0	-21	swapper/5	07:04:13	5
3897567	99	43	41,2	cyclictest	274488	-21	kworker/u16:0+events_unbound	11:51:54	5
3897563	99	43	41,2	cyclictest	4064705	-21	kworker/u16:0+events_unbound	08:52:00	4
3897563	99	43	41,2	cyclictest	276316	-21	kworker/u16:4+events_unbound	12:02:02	4
3897563	99	43	41,2	cyclictest	276316	-21	kworker/u16:4+events_unbound	12:02:02	4
3897563	99	43	41,2	cyclictest	105314	-21	kworker/u16:2+flush-8:0	11:21:55	4
3896365	2	43	8,29	sleep7	0	-21	swapper/7	07:02:06	7
3897563	99	42	40,2	cyclictest	4666	-21	kworker/u16:4+flush-8:0	09:32:03	4
3897563	99	42	40,2	cyclictest	4666	-21	kworker/u16:4+events_unbound	10:13:20	4
3897563	99	42	40,2	cyclictest	3997394	-21	kworker/u16:0+flush-8:0	08:07:04	4
3897563	99	42	40,2	cyclictest	372715	-21	kworker/u16:3+events_unbound	12:21:54	4
3897563	99	42	40,2	cyclictest	274488	-21	kworker/u16:0+events_unbound	11:42:00	4
3897568	99	41	39,2	cyclictest	4026486	-21	kworker/u16:1+flush-8:0	09:07:00	6
3897567	99	41	39,2	cyclictest	4122193	-21	kworker/u16:3+events_unbound	10:11:54	5
3897567	99	41	39,2	cyclictest	4122193	-21	kworker/u16:3+events_unbound	09:42:08	5
3897567	99	41	39,2	cyclictest	105314	-21	kworker/u16:2+events_unbound	10:28:04	5
3897567	99	41	38,2	cyclictest	105314	-21	kworker/u16:2+events_unbound	11:21:40	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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