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 100 highest latencies:

System rack0slot2.osadl.org (updated Wed Feb 04, 2026 00:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3335058	2	72	0,1	sleep7	3335057	-21	ssh	21:48:21	7
2992099	2	58	21,32	sleep7	0	-21	swapper/7	19:03:16	7
2992308	2	52	42,7	sleep6	0	-21	swapper/6	19:06:11	6
2992124	2	47	36,8	sleep5	0	-21	swapper/5	19:03:38	5
2992011	2	46	35,8	sleep4	0	-21	swapper/4	19:02:00	4
2992628	99	44	36,7	cyclictest	3516749	-21	latency_hist	23:06:23	7
2992625	99	44	42,2	cyclictest	3514659	-21	kworker/u16:2+flush-8:0	00:21:50	6
3336882	2	39	0,0	sleep5	0	-21	swapper/5	21:51:24	5
2992625	99	39	37,2	cyclictest	3468646	-21	kworker/u16:0+flush-8:0	23:31:53	6
2992625	99	39	37,2	cyclictest	3406370	-21	kworker/u16:3+events_unbound	22:25:58	6
2992625	99	38	36,2	cyclictest	3659833	-21	kworker/u16:0+events_unbound	00:05:01	6
2992625	99	38	36,2	cyclictest	3514659	-21	kworker/u16:2+events_unbound	23:26:06	6
2992625	99	38	36,2	cyclictest	3209341	-21	kworker/u16:1+events_unbound	21:19:06	6
2992625	99	37	35,2	cyclictest	3501716	-21	kworker/u16:1+events_unbound	23:05:25	6
2992625	99	37	35,2	cyclictest	3275911	-21	kworker/u16:0+events_unbound	22:34:30	6
2992625	99	37	35,2	cyclictest	3275911	-21	kworker/u16:0+events_unbound	22:04:34	6
2992625	99	36	34,2	cyclictest	3633799	-21	kworker/u16:5+events_unbound	00:19:29	6
2992625	99	36	34,2	cyclictest	3501716	-21	kworker/u16:1+events_unbound	23:13:45	6
2992625	99	36	34,2	cyclictest	3468646	-21	kworker/u16:0+events_unbound	23:30:40	6
2992625	99	36	34,2	cyclictest	3455658	-21	kworker/u16:1+events_unbound	22:45:25	6
2992625	99	36	34,2	cyclictest	3337089	-21	kworker/u16:2+events_unbound	22:15:49	6
2992625	99	36	34,2	cyclictest	3302945	-21	kworker/u16:2+events_unbound	21:38:13	6
2992625	99	36	34,2	cyclictest	3275911	-21	kworker/u16:0+events_unbound	21:31:13	6
2992625	99	35	33,2	cyclictest	3552730	-21	kworker/u16:3+events_unbound	23:37:40	6
2992625	99	35	33,2	cyclictest	3501716	-21	kworker/u16:1+events_unbound	23:08:17	6
2992625	99	34	32,2	cyclictest	3720721	-21	kworker/u16:1+events_unbound	00:33:45	6
2992625	99	34	32,2	cyclictest	3659833	-21	kworker/u16:0+events_unbound	00:07:49	6
2992625	99	34	32,2	cyclictest	3633799	-21	kworker/u16:5+events_unbound	00:28:56	6
2992625	99	34	32,2	cyclictest	3633799	-21	kworker/u16:5+events_unbound	00:28:56	6
2992625	99	34	32,2	cyclictest	3468646	-21	kworker/u16:0+events_unbound	23:49:37	6
2992625	99	34	32,2	cyclictest	3382404	-21	kworker/u16:1+events_unbound	22:27:54	6
2992625	99	34	32,2	cyclictest	3275911	-21	kworker/u16:0+events_unbound	21:53:30	6
2992625	99	33	31,2	cyclictest	3514659	-21	kworker/u16:2+events_unbound	23:19:16	6
2992625	99	33	31,2	cyclictest	3406370	-21	kworker/u16:3+events_unbound	22:48:09	6
2992625	99	33	31,2	cyclictest	3209341	-21	kworker/u16:1+events_unbound	21:49:26	6
2992625	99	33	31,2	cyclictest	3209341	-21	kworker/u16:1+events_unbound	21:14:54	6
2992625	99	33	31,2	cyclictest	2928928	-21	kworker/u16:2+events_unbound	21:11:07	6
2992625	99	33	30,2	cyclictest	3209341	-21	kworker/u16:1+events_unbound	21:21:33	6
2992628	99	32	0,31	cyclictest	3360658	-21	latency_hist	22:01:24	7
2992625	99	32	30,2	cyclictest	3501716	-21	kworker/u16:1+events_unbound	22:58:38	6
2992625	99	32	30,2	cyclictest	3406370	-21	kworker/u16:3+events_unbound	22:38:25	6
2992625	99	32	30,2	cyclictest	3337089	-21	kworker/u16:2+events_unbound	21:59:49	6
2992625	99	32	30,2	cyclictest	3275911	-21	kworker/u16:0+events_unbound	22:10:50	6
2992625	99	31	29,2	cyclictest	3514659	-21	kworker/u16:2+events_unbound	23:53:20	6
2992625	99	31	29,2	cyclictest	3276796	-21	kworker/u16:3+events_unbound	21:35:10	6
2992625	99	31	29,2	cyclictest	3209341	-21	kworker/u16:1+events_unbound	21:45:17	6
2992625	99	30	28,2	cyclictest	3588727	-21	kworker/u16:1+events_unbound	23:57:49	6
2992625	99	30	28,2	cyclictest	3468646	-21	kworker/u16:0+events_unbound	23:44:01	6
2992625	99	30	28,2	cyclictest	3468646	-21	kworker/u16:0+events_unbound	23:44:01	6
2992625	99	30	28,2	cyclictest	3382404	-21	kworker/u16:1+events_unbound	22:18:21	6
2992611	99	30	28,2	cyclictest	2928928	-21	kworker/u16:2+events_unbound	19:06:54	4
2992625	99	29	27,2	cyclictest	3633799	-21	kworker/u16:5+events_unbound	00:13:08	6
2992625	99	29	27,2	cyclictest	3431082	-21	kworker/u16:2+events_unbound	22:54:22	6
2992625	99	28	25,2	cyclictest	3189498	-21	kworker/u16:3+flush-8:0	20:51:24	6
2992611	99	28	26,2	cyclictest	3209341	-21	kworker/u16:1+flush-8:0	21:16:49	4
2992611	99	28	25,2	cyclictest	3275911	-21	kworker/u16:0+flush-8:0	22:16:24	4
2992628	99	27	25,1	cyclictest	0	-21	swapper/7	00:06:39	7
2992619	99	27	25,2	cyclictest	3468646	-21	kworker/u16:0+events_unbound	23:41:38	5
2992619	99	27	25,2	cyclictest	3468646	-21	kworker/u16:0+events_unbound	23:41:38	5
2992611	99	27	23,3	cyclictest	3633799	-21	kworker/u16:5+flush-8:0	23:58:02	4
2992625	99	26	24,2	cyclictest	2982741	-21	kworker/u16:3+events_unbound	19:35:35	6
2992625	99	26	24,2	cyclictest	2982741	-21	kworker/u16:3+events_unbound	19:35:35	6
2992619	99	26	24,2	cyclictest	3302945	-21	kworker/u16:2+events_unbound	21:41:37	5
2992625	99	25	23,2	cyclictest	2928928	-21	kworker/u16:2+events_unbound	20:40:34	6
2992611	99	25	23,2	cyclictest	2928928	-21	kworker/u16:2+events_unbound	21:06:49	4
2992625	99	24	22,2	cyclictest	3026003	-21	kworker/u16:0+events_unbound	19:30:58	6
2992625	99	24	22,2	cyclictest	2928928	-21	kworker/u16:2+flush-8:0	20:31:50	6
2992611	99	24	22,2	cyclictest	3633799	-21	kworker/u16:5+events_unbound	00:14:36	4
2992628	99	23	18,4	cyclictest	3312660	-21	latency_hist	21:41:24	7
2992625	99	23	21,2	cyclictest	3026003	-21	kworker/u16:0+events_unbound	21:00:58	6
2992619	99	23	20,3	cyclictest	3406370	-21	kworker/u16:3+flush-8:0	22:26:38	5
2992611	99	23	21,2	cyclictest	3382404	-21	kworker/u16:1+flush-8:0	22:11:49	4
2992611	99	23	20,2	cyclictest	2928928	-21	kworker/u16:2+events_unbound	20:31:39	4
2992611	99	23	20,2	cyclictest	2928928	-21	kworker/u16:2+events_unbound	19:56:38	4
2992625	99	22	20,2	cyclictest	3026003	-21	kworker/u16:0+events_unbound	21:02:02	6
2992625	99	22	20,2	cyclictest	3026003	-21	kworker/u16:0+events_unbound	19:22:34	6
2992625	99	22	20,2	cyclictest	2982741	-21	kworker/u16:3+events_unbound	19:19:07	6
2992625	99	22	20,2	cyclictest	2982741	-21	kworker/u16:3+events_unbound	19:11:02	6
2992625	99	22	20,2	cyclictest	2919316	-21	kworker/u16:1+events_unbound	19:16:17	6
2992625	99	22	19,2	cyclictest	3026003	-21	kworker/u16:0+events_unbound	20:26:34	6
2992611	99	22	19,2	cyclictest	3633799	-21	kworker/u16:5+events_unbound	00:26:37	4
2992611	99	22	19,2	cyclictest	3633799	-21	kworker/u16:5+events_unbound	00:26:37	4
2992628	99	21	14,6	cyclictest	0	-21	swapper/7	22:21:45	7
2992625	99	21	19,2	cyclictest	2982741	-21	kworker/u16:3+events_unbound	20:13:58	6
2992625	99	21	19,2	cyclictest	2928928	-21	kworker/u16:2+events_unbound	20:51:11	6
2992619	99	21	18,2	cyclictest	3249788	-21	kworker/u16:5+events_unbound	21:16:38	5
2992625	99	20	18,2	cyclictest	3026003	-21	kworker/u16:0+events_unbound	20:42:45	6
2992625	99	20	17,2	cyclictest	2928928	-21	kworker/u16:2+events_unbound	19:51:25	6
2992619	99	20	18,2	cyclictest	3514659	-21	kworker/u16:2+flush-8:0	23:06:23	5
2992611	99	20	18,2	cyclictest	2928928	-21	kworker/u16:2+events_unbound	20:11:37	4
2992628	99	19	18,0	cyclictest	0	-21	swapper/7	20:21:57	7
2992628	99	19	14,4	cyclictest	3456650	-21	latency_hist	22:41:24	7
2992628	99	19	14,4	cyclictest	3300732	-21	latency_hist	21:36:23	7
2992628	99	19	1,2	cyclictest	3609611	-21	ssh	23:41:46	7
2992628	99	19	1,2	cyclictest	3609611	-21	ssh	23:41:46	7
2992625	99	19	17,2	cyclictest	2982741	-21	kworker/u16:3+events_unbound	19:47:11	6
2992611	99	19	17,2	cyclictest	3514659	-21	kworker/u16:2+events_unbound	23:31:38	4
2992611	99	19	17,2	cyclictest	3431082	-21	kworker/u16:2+flush-8:0	22:36:46	4
2992628	99	18	13,4	cyclictest	3288735	-21	latency_hist	21:31:24	7
2992625	99	18	16,2	cyclictest	2928928	-21	kworker/u16:2+events_unbound	20:18:59	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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