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 50 highest latencies:

System rack0slot2.osadl.org (updated Sat Sep 19, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3891051	2	96	0,1	sleep7	3891054	-21	cut	12:24:44	7
3891051	2	96	0,1	sleep7	3891054	-21	cut	12:24:44	7
3170211	2	52	18,29	sleep7	0	-21	swapper/7	07:05:50	7
3170386	2	45	35,7	sleep4	0	-21	swapper/4	07:08:20	4
3161194	2	45	34,7	sleep5	0	-21	swapper/5	07:04:28	5
3170743	99	42	36,5	cyclictest	3777418	-21	latency_hist	11:39:24	7
3170738	99	40	38,2	cyclictest	3801124	-21	kworker/u16:4+events_unbound	11:50:38	5
3170734	99	40	38,2	cyclictest	3801124	-21	kworker/u16:4+events_unbound	12:02:26	4
3170742	99	39	37,2	cyclictest	3691212	-21	kworker/u16:4+events_unbound	11:33:46	6
3170742	99	39	33,6	cyclictest	3590816	-21	kworker/u16:2+events_unbound	11:07:11	6
3170742	99	39	33,6	cyclictest	3590816	-21	kworker/u16:2+events_unbound	11:07:11	6
3170738	99	39	37,2	cyclictest	3369326	-21	kworker/u16:3+events_unbound	10:48:10	5
3170734	99	39	37,2	cyclictest	3761959	-21	kworker/u16:6+events_unbound	11:35:47	4
3170734	99	39	37,2	cyclictest	3590816	-21	kworker/u16:2+events_unbound	11:01:02	4
3170742	99	38	36,2	cyclictest	3369326	-21	kworker/u16:3+events_unbound	12:06:46	6
3170738	99	38	36,2	cyclictest	3801124	-21	kworker/u16:4+events_unbound	12:09:18	5
3170734	99	38	36,2	cyclictest	3873298	-21	kworker/u16:0+flush-8:0	12:25:01	4
3170734	99	38	36,2	cyclictest	3873298	-21	kworker/u16:0+flush-8:0	12:25:01	4
3170734	99	38	36,2	cyclictest	3369326	-21	kworker/u16:3+events_unbound	12:21:41	4
3170734	99	38	36,2	cyclictest	3203809	-21	kworker/u16:2+events_unbound	09:56:58	4
3170742	99	37	35,2	cyclictest	3873298	-21	kworker/u16:0+events_unbound	12:18:06	6
3170742	99	37	35,2	cyclictest	3457571	-21	kworker/u16:0+events_unbound	09:52:42	6
3170742	99	37	35,2	cyclictest	3369326	-21	kworker/u16:3+events_unbound	09:20:31	6
3170734	99	37	35,2	cyclictest	3369326	-21	kworker/u16:3+events_unbound	09:32:54	4
3170734	99	37	34,2	cyclictest	3801124	-21	kworker/u16:4+events_unbound	12:14:27	4
3170743	99	36	35,0	cyclictest	0	-21	swapper/7	11:29:26	7
3170742	99	36	34,2	cyclictest	3888115	-21	kworker/u16:5+events_unbound	12:36:01	6
3170742	99	36	34,2	cyclictest	3801124	-21	kworker/u16:4+events_unbound	12:00:38	6
3170742	99	36	34,2	cyclictest	3590816	-21	kworker/u16:2+events_unbound	11:58:49	6
3170742	99	36	34,2	cyclictest	3590816	-21	kworker/u16:2+events_unbound	11:52:26	6
3170742	99	36	34,2	cyclictest	3590816	-21	kworker/u16:2+events_unbound	11:02:59	6
3170742	99	36	34,2	cyclictest	3457571	-21	kworker/u16:0+events_unbound	10:33:54	6
3170742	99	36	34,2	cyclictest	3457571	-21	kworker/u16:0+events_unbound	10:12:38	6
3170742	99	36	34,2	cyclictest	3369326	-21	kworker/u16:3+events_unbound	12:13:38	6
3170742	99	36	34,2	cyclictest	3369326	-21	kworker/u16:3+events_unbound	11:17:54	6
3170742	99	36	34,2	cyclictest	3369326	-21	kworker/u16:3+events_unbound	11:13:34	6
3170738	99	36	34,2	cyclictest	3888114	-21	kworker/u16:2+events_unbound	12:36:50	5
3170738	99	36	34,2	cyclictest	3691212	-21	kworker/u16:4+events_unbound	11:25:06	5
3170738	99	36	34,2	cyclictest	3590816	-21	kworker/u16:2+events_unbound	10:56:54	5
3170738	99	36	34,2	cyclictest	3457571	-21	kworker/u16:0+events_unbound	10:21:02	5
3170738	99	36	34,2	cyclictest	3369326	-21	kworker/u16:3+events_unbound	09:21:18	5
3170734	99	36	34,2	cyclictest	3801124	-21	kworker/u16:4+events_unbound	12:11:53	4
3170734	99	36	34,2	cyclictest	3457571	-21	kworker/u16:0+events_unbound	10:29:01	4
3170734	99	36	34,2	cyclictest	3457571	-21	kworker/u16:0+events_unbound	09:41:30	4
3170734	99	36	34,2	cyclictest	3369326	-21	kworker/u16:3+events_unbound	11:15:14	4
3170734	99	36	34,2	cyclictest	3369326	-21	kworker/u16:3+events_unbound	10:22:46	4
3170743	99	35	31,3	cyclictest	3668055	-21	ps	10:54:43	7
3170742	99	35	33,2	cyclictest	3888115	-21	kworker/u16:5+events_unbound	12:31:41	6
3170742	99	35	33,2	cyclictest	3777804	-21	kworker/u16:0+events_unbound	11:43:01	6
3170742	99	35	33,2	cyclictest	3457571	-21	kworker/u16:0+events_unbound	10:08:10	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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