OSADL QA Farm on Real-time of Mainline Linux

About - Hardware - CPUs - Benchmarks - Graphics - Benchmarks - Kernels - Boards/Distros - Latency monitoring - Latency plots - System data - Profiles - Compare - Awards

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 Tue Jan 20, 2026 00:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3776569	2	66	41,7	sleep5	0	-21	swapper/5	19:04:20	5
3777063	99	55	51,3	cyclictest	3925914	-21	kworker/u16:3+flush-8:0	20:27:24	4
3776559	2	51	40,8	sleep4	0	-21	swapper/4	19:04:11	4
3777073	99	47	42,4	cyclictest	4061598	-21	latency_hist	21:27:23	7
3777073	99	42	36,5	cyclictest	3838934	-21	latency_hist	19:37:24	7
3777063	99	41	39,2	cyclictest	3915896	-21	kworker/u16:1+flush-8:0	20:17:24	4
3777063	99	41	39,2	cyclictest	3915896	-21	kworker/u16:1+flush-8:0	20:17:24	4
3776505	2	41	31,7	sleep6	0	-21	swapper/6	19:03:25	6
3777069	99	40	38,2	cyclictest	12484	-21	kworker/u16:4+events_unbound	22:27:46	6
3777065	99	39	37,2	cyclictest	4159321	-21	kworker/u16:3+events_unbound	22:31:23	5
3777069	99	38	36,2	cyclictest	50706	-21	kworker/u16:4+events_unbound	22:57:58	6
3777069	99	38	36,2	cyclictest	4144592	-21	kworker/u16:5+events_unbound	22:11:54	6
3777069	99	38	36,2	cyclictest	3965021	-21	kworker/u16:0+events_unbound	21:28:31	6
3777069	99	38	36,2	cyclictest	290823	-21	kworker/u16:0+events_unbound	00:19:33	6
3777063	99	38	35,2	cyclictest	159753	-21	kworker/u16:0+events_unbound	23:42:33	4
3767803	2	38	2,30	sleep7	0	-21	swapper/7	19:02:37	7
3777069	99	37	35,2	cyclictest	4062084	-21	kworker/u16:1+events_unbound	23:08:15	6
3777069	99	37	35,2	cyclictest	3776503	-21	kworker/u16:0+flush-8:0	20:02:54	6
3777069	99	37	35,2	cyclictest	232879	-21	kworker/u16:3+events_unbound	00:29:25	6
3777069	99	36	34,2	cyclictest	50706	-21	kworker/u16:4+events_unbound	23:53:22	6
3777069	99	36	34,2	cyclictest	232442	-21	kworker/u16:2+events_unbound	00:17:22	6
3777069	99	36	34,2	cyclictest	232442	-21	kworker/u16:2+events_unbound	00:08:58	6
3777069	99	36	34,2	cyclictest	159753	-21	kworker/u16:0+events_unbound	23:35:02	6
3777069	99	36	34,2	cyclictest	123872	-21	kworker/u16:2+events_unbound	23:13:26	6
3777069	99	35	33,2	cyclictest	50706	-21	kworker/u16:4+events_unbound	23:49:27	6
3777069	99	35	33,2	cyclictest	50706	-21	kworker/u16:4+events_unbound	23:46:43	6
3777069	99	35	33,2	cyclictest	4144592	-21	kworker/u16:5+events_unbound	22:00:30	6
3777069	99	35	33,2	cyclictest	4062084	-21	kworker/u16:1+events_unbound	23:39:02	6
3777069	99	35	33,2	cyclictest	4062084	-21	kworker/u16:1+events_unbound	23:31:13	6
3777069	99	35	33,2	cyclictest	4062084	-21	kworker/u16:1+events_unbound	23:06:43	6
3777069	99	35	33,2	cyclictest	4062084	-21	kworker/u16:1+events_unbound	21:49:55	6
3777069	99	35	33,2	cyclictest	4062084	-21	kworker/u16:1+events_unbound	21:40:42	6
3777069	99	35	33,2	cyclictest	4013033	-21	kworker/u16:2+events_unbound	21:13:17	6
3777069	99	35	33,2	cyclictest	3965021	-21	kworker/u16:0+events_unbound	21:55:18	6
3777069	99	35	33,2	cyclictest	3925914	-21	kworker/u16:3+events_unbound	21:20:34	6
3777069	99	35	33,2	cyclictest	3732921	-21	kworker/u16:1+events_unbound	19:07:27	6
3777069	99	35	33,2	cyclictest	27673	-21	kworker/u16:0+events_unbound	22:34:58	6
3777069	99	35	33,2	cyclictest	232442	-21	kworker/u16:2+events_unbound	00:00:02	6
3777069	99	35	32,2	cyclictest	4144592	-21	kworker/u16:5+events_unbound	22:03:38	6
3777069	99	35	32,2	cyclictest	3776503	-21	kworker/u16:0+events_unbound	19:32:26	6
3777073	99	34	29,4	cyclictest	26334	-21	latency_hist	22:32:24	7
3777069	99	34	32,2	cyclictest	4159321	-21	kworker/u16:3+events_unbound	22:19:10	6
3777069	99	34	32,2	cyclictest	4159321	-21	kworker/u16:3+events_unbound	22:19:10	6
3777069	99	34	32,2	cyclictest	3965021	-21	kworker/u16:0+events_unbound	21:43:50	6
3777073	99	33	28,4	cyclictest	650	-21	systemd-journal	19:47:19	7
3777069	99	33	31,2	cyclictest	4062084	-21	kworker/u16:1+flush-8:0	23:24:29	6
3777069	99	33	31,2	cyclictest	3965021	-21	kworker/u16:0+flush-8:0	21:07:47	6
3777065	99	33	31,2	cyclictest	159753	-21	kworker/u16:0+flush-8:0	23:42:18	5
3777069	99	32	30,2	cyclictest	4159321	-21	kworker/u16:3+flush-8:0	22:50:42	6
3777069	99	32	30,2	cyclictest	4159321	-21	kworker/u16:3+events_unbound	22:22:27	6
3777069	99	32	30,2	cyclictest	4062084	-21	kworker/u16:1+events_unbound	22:46:59	6
3777069	99	32	30,2	cyclictest	4062084	-21	kworker/u16:1+events_unbound	00:05:15	6
3777069	99	32	30,2	cyclictest	4013033	-21	kworker/u16:2+events_unbound	21:36:46	6
3777069	99	32	30,2	cyclictest	4013033	-21	kworker/u16:2+events_unbound	21:24:50	6
3777069	99	32	30,2	cyclictest	290823	-21	kworker/u16:0+events_unbound	00:23:57	6
3777065	99	31	29,2	cyclictest	4062084	-21	kworker/u16:1+events_unbound	22:42:18	5
3777069	99	30	28,2	cyclictest	50706	-21	kworker/u16:4+flush-8:0	23:18:41	6
3777069	99	30	28,2	cyclictest	4062084	-21	kworker/u16:1+events_unbound	22:41:54	6
3777069	99	30	28,2	cyclictest	232879	-21	kworker/u16:3+events_unbound	00:35:46	6
3777065	99	30	28,2	cyclictest	4062084	-21	kworker/u16:1+events_unbound	23:13:02	5
3777065	99	30	28,2	cyclictest	4013033	-21	kworker/u16:2+flush-8:0	21:58:23	5
3777065	99	30	28,2	cyclictest	4013033	-21	kworker/u16:2+flush-8:0	21:57:18	5
3777065	99	30	27,2	cyclictest	50706	-21	kworker/u16:4+flush-8:0	23:27:33	5
3777063	99	30	28,2	cyclictest	3965021	-21	kworker/u16:0+events_unbound	21:47:42	4
4121386	2	29	0,1	chrt	4121387	-21	sshd-session	21:50:32	7
3777069	99	29	27,2	cyclictest	50706	-21	kworker/u16:4+events_unbound	22:54:30	6
3777069	99	29	27,2	cyclictest	4159321	-21	kworker/u16:3+events_unbound	22:13:59	6
3777069	99	29	27,2	cyclictest	3900885	-21	kworker/u16:2+events_unbound	20:07:52	6
3777069	99	29	27,2	cyclictest	3848768	-21	kworker/u16:1+events_unbound	19:42:55	6
3777065	99	29	27,2	cyclictest	4062084	-21	kworker/u16:1+events_unbound	23:52:23	5
3777065	99	29	27,2	cyclictest	3925914	-21	kworker/u16:3+events_unbound	21:18:25	5
3777065	99	29	27,2	cyclictest	305621	-21	kworker/u16:2+events_unbound	00:36:23	5
3777065	99	29	27,2	cyclictest	232879	-21	kworker/u16:3+events_unbound	00:28:23	5
3777063	99	29	27,2	cyclictest	232879	-21	kworker/u16:3+events_unbound	00:07:42	4
3777063	99	29	26,2	cyclictest	3787001	-21	kworker/u16:2+events_unbound	19:37:43	4
3777073	99	28	0,21	cyclictest	64017	-21	sh	22:47:39	7
3777065	99	28	26,2	cyclictest	4062084	-21	kworker/u16:1+flush-8:0	23:05:53	5
3777065	99	28	26,2	cyclictest	4013033	-21	kworker/u16:2+flush-8:0	21:07:49	5
3777065	99	28	26,2	cyclictest	4013033	-21	kworker/u16:2+events_unbound	21:14:54	5
3777065	99	28	26,2	cyclictest	232879	-21	kworker/u16:3+events_unbound	00:08:23	5
3777073	99	27	24,2	cyclictest	253971	-21	sh	00:02:53	7
3777073	99	27	22,4	cyclictest	3887211	-21	latency_hist	20:02:23	7
3777065	99	27	25,2	cyclictest	4183365	-21	kworker/u16:0+flush-8:0	22:23:42	5
3777065	99	27	25,2	cyclictest	4062084	-21	kworker/u16:1+events_unbound	23:59:23	5
3777065	99	27	25,2	cyclictest	3925966	-21	kworker/u16:4+events_unbound	20:52:18	5
3777063	99	27	25,2	cyclictest	4013033	-21	kworker/u16:2+flush-8:0	21:12:49	4
3777063	99	27	25,2	cyclictest	3965021	-21	kworker/u16:0+events_unbound	21:45:53	4
3777073	99	26	23,2	cyclictest	111166	-21	ssh	23:07:18	7
3777069	99	26	24,2	cyclictest	3925966	-21	kworker/u16:4+flush-8:0	20:52:33	6
3777069	99	26	24,2	cyclictest	3787001	-21	kworker/u16:2+flush-8:0	19:39:54	6
3777065	99	26	23,2	cyclictest	232879	-21	kworker/u16:3+events_unbound	00:02:35	5
3777073	99	25	23,1	cyclictest	0	-21	swapper/7	23:22:47	7
3777065	99	25	23,2	cyclictest	84702	-21	kworker/u16:0+flush-8:0	23:09:38	5
3777065	99	25	23,2	cyclictest	4144592	-21	kworker/u16:5+events_unbound	22:03:34	5
3777063	99	25	23,2	cyclictest	3925914	-21	kworker/u16:3+flush-8:0	20:27:51	4
3777063	99	25	23,2	cyclictest	3848768	-21	kworker/u16:1+events_unbound	19:58:24	4
3777073	99	24	24,0	cyclictest	0	-21	swapper/7	22:02:49	7
3777069	99	24	22,2	cyclictest	3776503	-21	kworker/u16:0+events_unbound	19:29:03	6
3777069	99	24	21,2	cyclictest	3925914	-21	kworker/u16:3+flush-8:0	21:02:33	6
3777065	99	24	22,2	cyclictest	50706	-21	kworker/u16:4+events_unbound	22:48:54	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


Access: public		Short link to this page
This page was last modified on 2019-05-28 - 00:17