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 Fri Dec 26, 2025 12:43:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
885782	2	94	0,1	sleep7	885783	-21	cat	09:19:15	7
714595	2	65	0,1	sleep6	0	-21	swapper/6	07:49:24	6
619806	2	60	48,8	sleep5	0	-21	swapper/5	07:04:12	5
629076	2	59	48,8	sleep4	0	-21	swapper/4	07:09:00	4
619807	2	56	45,7	sleep6	0	-21	swapper/6	07:04:13	6
628810	2	53	17,31	sleep7	0	-21	swapper/7	07:05:18	7
629374	99	47	41,5	cyclictest	1117071	-21	latency_hist	11:19:03	7
629365	99	43	40,2	cyclictest	1166137	-21	kworker/u16:2+events_unbound	11:54:05	5
629374	99	42	34,7	cyclictest	855890	-21	latency_hist	09:04:03	7
629374	99	40	34,5	cyclictest	1262024	-21	latency_hist	12:34:03	7
629374	99	40	0,38	cyclictest	1223421	-21	latency_hist	12:14:03	7
629365	99	39	36,2	cyclictest	1043036	-21	kworker/u16:1+events_unbound	10:54:18	5
629365	99	38	35,2	cyclictest	1246487	-21	kworker/u16:4+events_unbound	12:29:21	5
629365	99	36	34,2	cyclictest	953186	-21	kworker/u16:2+flush-8:0	09:54:18	5
629365	99	36	34,2	cyclictest	953186	-21	kworker/u16:2+flush-8:0	09:54:18	5
629374	99	35	30,4	cyclictest	1175058	-21	latency_hist	11:49:03	7
629365	99	35	33,2	cyclictest	681996	-21	kworker/u16:1+events_unbound	08:53:14	5
629365	99	35	33,2	cyclictest	609737	-21	kworker/u16:0+events_unbound	07:42:14	5
629365	99	34	32,2	cyclictest	681996	-21	kworker/u16:1+events_unbound	08:01:15	5
629365	99	34	31,2	cyclictest	681996	-21	kworker/u16:1+events_unbound	08:14:21	5
629365	99	34	31,2	cyclictest	1088503	-21	kworker/u16:3+events_unbound	11:11:13	5
629365	99	34	31,2	cyclictest	1001490	-21	kworker/u16:0+events_unbound	10:24:05	5
629365	99	33	31,2	cyclictest	923935	-21	kworker/u16:3+events_unbound	09:44:19	5
629365	99	33	31,2	cyclictest	730192	-21	kworker/u16:4+events_unbound	08:05:14	5
629365	99	33	31,2	cyclictest	681996	-21	kworker/u16:1+events_unbound	07:48:14	5
629365	99	33	30,2	cyclictest	1088503	-21	kworker/u16:3+events_unbound	11:04:16	5
629365	99	32	30,2	cyclictest	1185849	-21	kworker/u16:1+events_unbound	12:17:22	5
629365	99	32	29,2	cyclictest	730192	-21	kworker/u16:4+events_unbound	08:24:21	5
629365	99	31	29,2	cyclictest	903436	-21	kworker/u16:1+flush-8:0	09:39:19	5
629365	99	31	29,2	cyclictest	865598	-21	kworker/u16:0+events_unbound	09:35:19	5
629365	99	31	29,2	cyclictest	798107	-21	kworker/u16:2+flush-8:0	08:38:14	5
629365	99	31	29,2	cyclictest	1059130	-21	kworker/u16:2+events_unbound	10:49:33	5
629365	99	31	28,2	cyclictest	681996	-21	kworker/u16:1+events_unbound	08:11:27	5
629365	99	31	28,2	cyclictest	662435	-21	kworker/u16:3+flush-8:0	07:29:34	5
629365	99	30	28,2	cyclictest	865686	-21	kworker/u16:3+events_unbound	09:12:14	5
629365	99	30	28,2	cyclictest	730192	-21	kworker/u16:4+flush-8:0	08:19:33	5
629365	99	30	28,2	cyclictest	730192	-21	kworker/u16:4+flush-8:0	08:19:33	5
629365	99	30	28,2	cyclictest	1242744	-21	kworker/u16:0+events_unbound	12:27:22	5
629365	99	30	28,2	cyclictest	1204179	-21	kworker/u16:3+events_unbound	12:23:14	5
629365	99	30	28,2	cyclictest	1204179	-21	kworker/u16:3+events_unbound	12:23:14	5
629365	99	30	28,2	cyclictest	1185849	-21	kworker/u16:1+events_unbound	12:10:22	5
629365	99	30	28,2	cyclictest	1125800	-21	kworker/u16:0+events_unbound	11:27:14	5
629365	99	30	28,2	cyclictest	1043036	-21	kworker/u16:1+events_unbound	11:44:05	5
629365	99	30	28,2	cyclictest	1043036	-21	kworker/u16:1+events_unbound	10:43:14	5
629365	99	30	26,3	cyclictest	662435	-21	kworker/u16:3+events_unbound	07:49:26	5
629365	99	29	27,2	cyclictest	730192	-21	kworker/u16:4+events_unbound	10:15:15	5
629365	99	29	27,2	cyclictest	681996	-21	kworker/u16:1+events_unbound	08:29:34	5
629365	99	29	26,2	cyclictest	1166137	-21	kworker/u16:2+flush-8:0	11:49:20	5
629369	99	28	25,2	cyclictest	865598	-21	kworker/u16:0+events_unbound	09:29:16	6
629369	99	28	25,2	cyclictest	845235	-21	kworker/u16:0+events_unbound	08:59:16	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