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 Aug 11, 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
3178285	2	97	0,1	sleep7	3178283	-21	ssh	12:03:06	7
2512670	2	64	36,7	sleep4	0	-21	swapper/4	07:04:13	4
2512874	2	62	20,36	sleep7	0	-21	swapper/7	07:07:05	7
2513256	99	51	0,49	cyclictest	2565493	-21	latency_hist	07:33:10	7
2513245	99	47	44,2	cyclictest	3167820	-21	kworker/u16:4+events_unbound	12:13:11	4
2513256	99	43	41,1	cyclictest	2750156	-21	diskmemload	10:28:44	7
2513245	99	42	40,2	cyclictest	2799013	-21	kworker/u16:2+flush-8:0	10:18:09	4
2513245	99	40	37,2	cyclictest	2642959	-21	kworker/u16:1+events_unbound	08:18:11	4
2513256	99	39	37,1	cyclictest	2750156	-21	diskmemload	11:32:36	7
2513254	99	38	36,2	cyclictest	2730537	-21	kworker/u16:0+events_unbound	09:48:03	6
2513254	99	38	32,6	cyclictest	2907254	-21	kworker/u16:3+flush-8:0	10:51:28	6
2513245	99	38	35,2	cyclictest	2730537	-21	kworker/u16:0+events_unbound	09:48:11	4
2513256	99	37	32,4	cyclictest	3166074	-21	latency_hist	11:58:08	7
2513254	99	37	35,2	cyclictest	3153947	-21	kworker/u16:2+events_unbound	12:10:02	6
2513254	99	37	35,2	cyclictest	2995318	-21	kworker/u16:2+events_unbound	11:04:35	6
2513254	99	37	35,2	cyclictest	2919603	-21	kworker/u16:0+events_unbound	10:54:51	6
2513254	99	37	35,2	cyclictest	2919603	-21	kworker/u16:0+events_unbound	10:26:15	6
2513245	99	37	35,2	cyclictest	3102002	-21	kworker/u16:0+events_unbound	11:30:47	4
2513245	99	37	35,2	cyclictest	3029396	-21	kworker/u16:1+flush-8:0	12:33:11	4
2513245	99	37	35,2	cyclictest	2995318	-21	kworker/u16:2+events_unbound	11:27:27	4
2513245	99	37	35,2	cyclictest	2835080	-21	kworker/u16:1+events_unbound	09:56:43	4
2513245	99	37	35,2	cyclictest	2691543	-21	kworker/u16:5+flush-8:0	09:08:52	4
2513256	99	36	34,1	cyclictest	2750156	-21	diskmemload	11:15:50	7
2513254	99	36	34,2	cyclictest	2907254	-21	kworker/u16:3+events_unbound	11:32:07	6
2513245	99	36	34,2	cyclictest	3102002	-21	kworker/u16:0+events_unbound	11:37:27	4
2513245	99	36	34,2	cyclictest	3029396	-21	kworker/u16:1+events_unbound	12:18:59	4
2513256	99	35	33,1	cyclictest	3213812	-21	ssh	12:15:59	7
2513256	99	35	33,1	cyclictest	2750156	-21	diskmemload	10:50:19	7
2513254	99	35	33,2	cyclictest	3140079	-21	kworker/u16:0+events_unbound	11:46:58	6
2513254	99	35	33,2	cyclictest	2995318	-21	kworker/u16:2+events_unbound	11:17:47	6
2513254	99	35	33,2	cyclictest	2730537	-21	kworker/u16:0+flush-8:0	09:26:39	6
2513254	99	35	33,2	cyclictest	2730537	-21	kworker/u16:0+events_unbound	09:59:23	6
2513245	99	35	33,2	cyclictest	2995318	-21	kworker/u16:2+flush-8:0	11:10:55	4
2513245	99	35	33,2	cyclictest	2995318	-21	kworker/u16:2+events_unbound	11:00:55	4
2513245	99	35	33,2	cyclictest	2907254	-21	kworker/u16:3+flush-8:0	11:54:47	4
2513245	99	35	33,2	cyclictest	2799013	-21	kworker/u16:2+events_unbound	09:37:16	4
2513245	99	35	33,2	cyclictest	2749825	-21	kworker/u16:1+events_unbound	09:24:59	4
2513245	99	35	33,2	cyclictest	2730537	-21	kworker/u16:0+events_unbound	09:29:48	4
2513256	99	34	32,1	cyclictest	2750156	-21	diskmemload	10:12:36	7
2513254	99	34	32,2	cyclictest	3029396	-21	kworker/u16:1+events_unbound	12:06:07	6
2513254	99	34	32,2	cyclictest	3029396	-21	kworker/u16:1+events_unbound	12:06:07	6
2513254	99	34	32,2	cyclictest	3029396	-21	kworker/u16:1+events_unbound	11:02:50	6
2513254	99	34	32,2	cyclictest	2919603	-21	kworker/u16:0+events_unbound	10:40:14	6
2513245	99	34	32,2	cyclictest	3029396	-21	kworker/u16:1+events_unbound	11:52:28	4
2513245	99	34	32,2	cyclictest	2995318	-21	kworker/u16:2+events_unbound	11:07:35	4
2513245	99	34	32,2	cyclictest	2958344	-21	kworker/u16:4+events_unbound	10:38:42	4
2513245	99	34	32,2	cyclictest	2730537	-21	kworker/u16:0+flush-8:0	09:58:43	4
2513245	99	34	32,2	cyclictest	2522820	-21	kworker/u16:4+events_unbound	07:58:09	4
2512690	2	34	24,7	sleep6	0	-21	swapper/6	07:04:31	6
2513256	99	33	27,4	cyclictest	2786752	-21	latency_hist	09:23:09	7
2513254	99	33	31,2	cyclictest	2907254	-21	kworker/u16:3+events_unbound	10:32:40	6
2513254	99	33	31,2	cyclictest	2822762	-21	kworker/u16:3+events_unbound	09:40:43	6
2513254	99	33	31,2	cyclictest	2730537	-21	kworker/u16:0+events_unbound	09:31:03	6
2513245	99	33	31,2	cyclictest	3153947	-21	kworker/u16:2+events_unbound	12:05:34	4
2513245	99	33	31,2	cyclictest	3153947	-21	kworker/u16:2+events_unbound	12:05:34	4
2513245	99	33	31,2	cyclictest	3140079	-21	kworker/u16:0+events_unbound	11:45:12	4
2513245	99	33	31,2	cyclictest	2995318	-21	kworker/u16:2+events_unbound	11:19:36	4
2512899	2	33	23,7	sleep5	0	-21	swapper/5	07:07:27	5
2513256	99	32	30,1	cyclictest	2750156	-21	diskmemload	09:58:09	7
2513256	99	32	25,5	cyclictest	648	-21	systemd-journal	11:48:09	7
2513254	99	32	30,2	cyclictest	3140079	-21	kworker/u16:0+events_unbound	11:53:03	6
2513254	99	32	30,2	cyclictest	3029396	-21	kworker/u16:1+events_unbound	12:14:27	6
2513254	99	32	30,2	cyclictest	2958344	-21	kworker/u16:4+events_unbound	10:45:24	6
2513254	99	32	30,2	cyclictest	2907254	-21	kworker/u16:3+events_unbound	11:35:42	6
2513254	99	32	30,2	cyclictest	2907254	-21	kworker/u16:3+events_unbound	11:25:55	6
2513254	99	32	30,2	cyclictest	2835080	-21	kworker/u16:1+events_unbound	09:56:23	6
2513254	99	32	30,2	cyclictest	2799013	-21	kworker/u16:2+events_unbound	09:51:16	6
2513254	99	32	30,2	cyclictest	2691543	-21	kworker/u16:5+events_unbound	09:14:24	6
2513254	99	32	30,2	cyclictest	2691543	-21	kworker/u16:5+events_unbound	09:09:07	6
2513245	99	32	30,2	cyclictest	3167820	-21	kworker/u16:4+events_unbound	12:12:20	4
2513245	99	32	30,2	cyclictest	2995318	-21	kworker/u16:2+events_unbound	10:50:10	4
2513245	99	32	30,2	cyclictest	2919603	-21	kworker/u16:0+flush-8:0	11:16:23	4
2513245	99	32	30,2	cyclictest	2919603	-21	kworker/u16:0+events_unbound	10:57:59	4
2513245	99	32	30,2	cyclictest	2919603	-21	kworker/u16:0+events_unbound	10:47:51	4
2513245	99	32	30,2	cyclictest	2894549	-21	kworker/u16:1+events_unbound	10:37:47	4
2513245	99	32	30,2	cyclictest	2894549	-21	kworker/u16:1+events_unbound	10:03:43	4
2513245	99	32	30,2	cyclictest	2822762	-21	kworker/u16:3+events_unbound	09:42:23	4
2513245	99	32	30,2	cyclictest	2799013	-21	kworker/u16:2+flush-8:0	10:27:55	4
2513245	99	32	30,2	cyclictest	2749825	-21	kworker/u16:1+flush-8:0	09:20:51	4
2513245	99	32	30,2	cyclictest	2730537	-21	kworker/u16:0+events_unbound	09:46:11	4
2513245	99	32	30,2	cyclictest	2691543	-21	kworker/u16:5+flush-8:0	09:17:36	4
2513256	99	31	30,0	cyclictest	0	-21	swapper/7	11:05:50	7
2513254	99	31	29,2	cyclictest	3167820	-21	kworker/u16:4+events_unbound	12:27:27	6
2513254	99	31	29,2	cyclictest	3153947	-21	kworker/u16:2+flush-8:0	11:59:23	6
2513254	99	31	29,2	cyclictest	3029396	-21	kworker/u16:1+events_unbound	11:39:48	6
2513254	99	31	29,2	cyclictest	2995318	-21	kworker/u16:2+events_unbound	11:11:55	6
2513254	99	31	29,2	cyclictest	2749825	-21	kworker/u16:1+events_unbound	09:21:44	6
2513245	99	31	29,2	cyclictest	3029396	-21	kworker/u16:1+flush-8:0	11:42:40	4
2513245	99	31	29,2	cyclictest	3029396	-21	kworker/u16:1+events_unbound	12:24:14	4
2513245	99	31	29,2	cyclictest	3029396	-21	kworker/u16:1+events_unbound	12:01:10	4
2513245	99	31	29,2	cyclictest	2919603	-21	kworker/u16:0+events_unbound	10:31:08	4
2513245	99	31	29,2	cyclictest	2907254	-21	kworker/u16:3+flush-8:0	10:11:06	4
2513245	99	31	29,2	cyclictest	2799013	-21	kworker/u16:2+events_unbound	10:20:59	4
2513245	99	31	29,2	cyclictest	2691543	-21	kworker/u16:5+flush-8:0	09:03:36	4
2513256	99	30	29,0	cyclictest	0	-21	swapper/7	12:28:18	7
2513254	99	30	28,2	cyclictest	2799013	-21	kworker/u16:2+events_unbound	10:05:28	6
2513254	99	30	28,2	cyclictest	2720750	-21	kworker/u16:1+flush-8:0	08:55:35	6
2513256	99	29	28,0	cyclictest	0	-21	swapper/7	09:43:12	7
2513256	99	29	26,2	cyclictest	2981764	-21	ssh	10:41:28	7
2513256	99	29	24,4	cyclictest	3080561	-21	latency_hist	11:23:08	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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