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 May 19, 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
3190818	2	94	0,1	sleep4	0	-21	swapper/4	08:18:01	4
3049368	99	54	52,2	cyclictest	3058918	-21	kworker/u16:3+flush-8:0	08:27:57	5
3049368	99	52	50,2	cyclictest	3110639	-21	kworker/u16:2+flush-8:0	08:18:12	5
3049368	99	51	49,2	cyclictest	3502773	-21	kworker/u16:0+flush-8:0	11:12:59	5
3049368	99	49	47,2	cyclictest	3273507	-21	kworker/u16:2+flush-8:0	09:02:57	5
3589052	2	47	0,1	sleep6	0	-21	swapper/6	11:12:58	6
3049368	99	47	45,2	cyclictest	3575707	-21	kworker/u16:4+flush-8:0	12:08:12	5
3048929	2	47	36,7	sleep5	0	-21	swapper/5	07:05:36	5
3049368	99	44	42,2	cyclictest	3648842	-21	kworker/u16:2+events_unbound	11:53:20	5
3049368	99	43	41,2	cyclictest	3758097	-21	kworker/u16:2+events_unbound	12:37:16	5
3049368	99	43	41,2	cyclictest	3709548	-21	kworker/u16:1+flush-8:0	12:23:07	5
3049368	99	43	41,2	cyclictest	3502774	-21	kworker/u16:3+events_unbound	11:07:57	5
3049368	99	43	41,2	cyclictest	3429566	-21	kworker/u16:2+flush-8:0	10:18:11	5
3048948	2	43	16,7	sleep4	0	-21	swapper/4	07:05:51	4
3049368	99	42	41,1	cyclictest	3319952	-21	kworker/u16:4+flush-8:0	10:22:59	5
3049368	99	42	38,2	cyclictest	3319952	-21	kworker/u16:4+events_unbound	10:03:16	5
3728601	2	41	0,0	sleep7	3728603	-21	cut	12:08:05	7
3049371	99	41	39,2	cyclictest	3429566	-21	kworker/u16:2+flush-8:0	10:38:10	6
3040472	2	40	3,31	sleep7	0	-21	swapper/7	07:02:57	7
3049368	99	39	37,2	cyclictest	3575707	-21	kworker/u16:4+events_unbound	11:51:48	5
3049368	99	39	37,2	cyclictest	3429566	-21	kworker/u16:2+events_unbound	10:34:40	5
3049368	99	39	37,2	cyclictest	3429566	-21	kworker/u16:2+events_unbound	10:16:12	5
3049368	99	39	37,2	cyclictest	3319952	-21	kworker/u16:4+flush-8:0	09:28:12	5
3049368	99	39	37,2	cyclictest	3099948	-21	kworker/u16:0+flush-8:0	07:48:10	5
3049368	99	39	36,2	cyclictest	3058918	-21	kworker/u16:3+events_unbound	09:37:44	5
3049373	99	38	36,1	cyclictest	3589010	-21	perl	11:12:58	7
3049368	99	38	36,2	cyclictest	3575707	-21	kworker/u16:4+flush-8:0	12:02:57	5
3049368	99	38	36,2	cyclictest	3502773	-21	kworker/u16:0+events_unbound	10:46:04	5
3049368	99	38	36,2	cyclictest	3319952	-21	kworker/u16:4+events_unbound	09:25:33	5
3049368	99	38	36,2	cyclictest	3307808	-21	kworker/u16:0+events_unbound	09:43:16	5
3049368	99	38	36,2	cyclictest	3286957	-21	kworker/u16:1+events_unbound	09:19:28	5
3049368	99	38	36,2	cyclictest	3273507	-21	kworker/u16:2+events_unbound	09:13:57	5
3049368	99	38	34,3	cyclictest	3099948	-21	kworker/u16:0+flush-8:0	08:03:08	5
3049368	99	37	35,2	cyclictest	3502773	-21	kworker/u16:0+events_unbound	11:02:08	5
3049368	99	37	35,2	cyclictest	3502773	-21	kworker/u16:0+events_unbound	10:54:17	5
3049368	99	37	35,2	cyclictest	3429566	-21	kworker/u16:2+events_unbound	10:38:15	5
3049368	99	37	35,2	cyclictest	3429565	-21	kworker/u16:1+events_unbound	10:29:16	5
3049368	99	37	35,2	cyclictest	3429565	-21	kworker/u16:1+events_unbound	10:29:16	5
3049368	99	37	35,2	cyclictest	3319952	-21	kworker/u16:4+events_unbound	09:52:29	5
3049368	99	37	35,2	cyclictest	3319952	-21	kworker/u16:4+events_unbound	09:52:29	5
3049368	99	36	34,2	cyclictest	3770324	-21	kworker/u16:3+events_unbound	12:28:44	5
3049368	99	36	34,2	cyclictest	3575707	-21	kworker/u16:4+events_unbound	12:17:12	5
3049368	99	36	34,2	cyclictest	3502773	-21	kworker/u16:0+events_unbound	12:00:04	5
3049368	99	36	34,2	cyclictest	3502773	-21	kworker/u16:0+events_unbound	10:50:10	5
3049368	99	36	34,2	cyclictest	3319952	-21	kworker/u16:4+flush-8:0	10:08:02	5
3049368	99	36	34,2	cyclictest	3319952	-21	kworker/u16:4+flush-8:0	09:58:08	5
3049368	99	35	33,2	cyclictest	3648842	-21	kworker/u16:2+events_unbound	11:47:36	5
3049368	99	35	33,2	cyclictest	3634493	-21	kworker/u16:1+events_unbound	11:30:36	5
3049368	99	35	33,2	cyclictest	3574739	-21	kworker/u16:1+events_unbound	11:20:49	5
3049368	99	35	33,2	cyclictest	3502774	-21	kworker/u16:3+events_unbound	11:06:12	5
3049368	99	35	33,2	cyclictest	3502773	-21	kworker/u16:0+events_unbound	11:40:20	5
3049368	99	35	33,2	cyclictest	3273507	-21	kworker/u16:2+events_unbound	09:09:10	5
3049368	99	35	33,2	cyclictest	3058918	-21	kworker/u16:3+flush-8:0	08:47:56	5
3049368	99	35	33,2	cyclictest	3058918	-21	kworker/u16:3+events_unbound	09:35:08	5
3049368	99	34	32,2	cyclictest	3575707	-21	kworker/u16:4+events_unbound	11:22:56	5
3049368	99	34	32,2	cyclictest	3502773	-21	kworker/u16:0+events_unbound	11:34:28	5
3049368	99	34	32,2	cyclictest	3307808	-21	kworker/u16:0+events_unbound	09:56:16	5
3049368	99	33	31,2	cyclictest	3575707	-21	kworker/u16:4+events_unbound	12:18:28	5
3317626	2	32	0,1	chrt	3317624	-21	ssh	09:18:38	7
3049368	99	32	29,2	cyclictest	3099948	-21	kworker/u16:0+events_unbound	07:37:46	5
3049368	99	32	29,2	cyclictest	3099948	-21	kworker/u16:0+events_unbound	07:37:46	5
3049368	99	31	29,2	cyclictest	3058918	-21	kworker/u16:3+events_unbound	08:58:02	5
3049371	99	30	29,1	cyclictest	3502773	-21	kworker/u16:0+events_unbound	12:08:03	6
3221920	2	29	0,1	chrt	3221921	-21	kthreadcore	08:33:03	7
3049373	99	29	24,4	cyclictest	3624399	-21	latency_hist	11:27:42	7
3049371	99	29	27,2	cyclictest	3502773	-21	kworker/u16:0+flush-8:0	11:42:57	6
3539740	2	28	0,0	sleep7	3539742	-21	grep	10:52:55	7
3049373	99	28	27,0	cyclictest	0	-21	swapper/7	12:29:54	7
3049373	99	28	27,0	cyclictest	0	-21	swapper/7	11:32:31	7
3049373	99	28	27,0	cyclictest	0	-21	swapper/7	09:01:09	7
3049373	99	28	25,2	cyclictest	124	-21	kswapd0	10:27:54	7
3049373	99	28	25,2	cyclictest	124	-21	kswapd0	10:27:54	7
3049371	99	28	26,2	cyclictest	3099948	-21	kworker/u16:0+flush-8:0	07:43:13	6
3049368	99	28	26,2	cyclictest	3058918	-21	kworker/u16:3+flush-8:0	08:08:10	5
3292486	2	27	0,1	chrt	3292489	-21	tr	09:08:12	7
3049373	99	27	26,0	cyclictest	0	-21	swapper/7	11:08:08	7
3049373	99	27	26,0	cyclictest	0	-21	swapper/7	10:08:56	7
3049373	99	27	23,2	cyclictest	3791487	-21	ntpq	12:33:12	7
3049373	99	26	24,1	cyclictest	0	-21	swapper/7	10:43:26	7
3049373	99	26	24,1	cyclictest	0	-21	swapper/7	08:19:44	7
3049368	99	26	24,2	cyclictest	3058918	-21	kworker/u16:3+events_unbound	08:42:37	5
3049373	99	25	24,0	cyclictest	0	-21	swapper/7	08:01:17	7
3049373	99	25	20,4	cyclictest	3368707	-21	latency_hist	09:42:42	7
3049371	99	25	22,2	cyclictest	3273507	-21	kworker/u16:2+flush-8:0	09:13:03	6
3049371	99	25	21,3	cyclictest	3099948	-21	kworker/u16:0+flush-8:0	07:58:00	6
3049368	99	25	23,2	cyclictest	3058918	-21	kworker/u16:3+events_unbound	08:13:09	5
3049368	99	25	23,2	cyclictest	3058918	-21	kworker/u16:3+events_unbound	07:34:58	5
3377158	2	24	0,1	chrt	3377159	-21	grep	09:43:06	7
3049373	99	24	23,0	cyclictest	0	-21	swapper/7	11:58:58	7
3049373	99	24	23,0	cyclictest	0	-21	swapper/7	10:14:48	7
3049373	99	24	23,0	cyclictest	0	-21	swapper/7	09:48:29	7
3049373	99	24	23,0	cyclictest	0	-21	swapper/7	09:48:29	7
3049373	99	24	23,0	cyclictest	0	-21	swapper/7	07:54:17	7
3049373	99	24	23,0	cyclictest	0	-21	swapper/7	07:49:36	7
3049373	99	24	23,0	cyclictest	0	-21	swapper/7	07:30:46	7
3049371	99	24	22,2	cyclictest	3709548	-21	kworker/u16:1+flush-8:0	12:21:00	6
3049368	99	24	22,2	cyclictest	3049138	-21	kworker/u16:1+events_unbound	07:22:44	5
3049373	99	23	22,0	cyclictest	0	-21	swapper/7	10:03:37	7
3049373	99	23	22,0	cyclictest	0	-21	swapper/7	08:40:17	7
3049373	99	23	22,0	cyclictest	0	-21	swapper/7	08:27:01	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