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 Thu Dec 04, 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
1938810	99	66	63,2	cyclictest	2235413	-21	kworker/u16:1+flush-8:0	18:02:43	6
1938421	2	57	47,7	sleep5	0	-21	swapper/5	15:21:50	5
1938434	2	53	20,29	sleep7	0	-21	swapper/7	15:22:00	7
1938411	2	53	43,7	sleep4	0	-21	swapper/4	15:21:41	4
1938802	99	47	44,2	cyclictest	2499758	-21	kworker/u16:2+events_unbound	20:46:10	4
1938802	99	46	44,2	cyclictest	2195203	-21	kworker/u16:4+events_unbound	17:55:10	4
1938813	99	45	40,4	cyclictest	2296240	-21	latency_hist	18:17:43	7
1938810	99	45	42,2	cyclictest	2548506	-21	kworker/u16:5+flush-8:0	20:42:43	6
1928893	2	44	34,7	sleep6	0	-21	swapper/6	15:17:50	6
1938813	99	43	0,41	cyclictest	589235	-21	systemd-journal	16:57:43	7
1938802	99	43	41,2	cyclictest	2386977	-21	kworker/u16:4+flush-8:0	19:13:58	4
1938804	99	42	40,2	cyclictest	2386977	-21	kworker/u16:4+events_unbound	19:49:10	5
1938804	99	42	40,2	cyclictest	2083836	-21	kworker/u16:2+events_unbound	17:04:31	5
1938804	99	41	39,2	cyclictest	2386977	-21	kworker/u16:4+flush-8:0	19:54:05	5
1938804	99	41	39,2	cyclictest	2124648	-21	kworker/u16:0+flush-8:0	17:18:47	5
1938804	99	41	39,2	cyclictest	2124648	-21	kworker/u16:0+flush-8:0	17:18:47	5
1938804	99	41	39,2	cyclictest	1982716	-21	kworker/u16:3+events_unbound	16:26:07	5
1938802	99	40	38,2	cyclictest	2386977	-21	kworker/u16:4+events_unbound	20:04:05	4
1938802	99	38	36,2	cyclictest	1948489	-21	kworker/u16:1+events_unbound	15:44:06	4
1938802	99	37	35,2	cyclictest	2346742	-21	kworker/u16:2+flush-8:0	19:23:07	4
1938802	99	37	35,2	cyclictest	2083836	-21	kworker/u16:2+events_unbound	17:09:10	4
1938802	99	37	35,2	cyclictest	2083836	-21	kworker/u16:2+events_unbound	16:48:53	4
1938802	99	37	35,2	cyclictest	1982716	-21	kworker/u16:3+flush-8:0	16:39:06	4
1938802	99	37	35,2	cyclictest	1982716	-21	kworker/u16:3+flush-8:0	16:39:06	4
1938813	99	36	32,3	cyclictest	2023500	-21	sh	16:02:43	7
1938813	99	36	31,4	cyclictest	2477987	-21	latency_hist	19:47:43	7
1938813	99	36	0,34	cyclictest	589235	-21	systemd-journal	19:41:08	7
1938804	99	36	34,2	cyclictest	2365983	-21	kworker/u16:0+events_unbound	19:22:10	5
1938810	99	35	32,2	cyclictest	2286134	-21	kworker/u16:4+events_unbound	18:17:58	6
1938804	99	35	33,2	cyclictest	2346742	-21	kworker/u16:2+events_unbound	19:29:02	5
1938804	99	35	33,2	cyclictest	2124648	-21	kworker/u16:0+events_unbound	17:01:10	5
1938804	99	35	33,2	cyclictest	2083836	-21	kworker/u16:2+events_unbound	17:27:11	5
1938804	99	35	33,2	cyclictest	2083836	-21	kworker/u16:2+events_unbound	17:27:11	5
1938802	99	35	33,2	cyclictest	2271160	-21	kworker/u16:3+events_unbound	18:36:34	4
1938802	99	35	33,2	cyclictest	2093236	-21	kworker/u16:5+events_unbound	16:58:14	4
1938813	99	34	29,4	cyclictest	2094175	-21	latency_hist	16:37:43	7
1938813	99	34	16,17	cyclictest	0	-21	swapper/7	20:23:07	7
1938810	99	34	31,2	cyclictest	2499758	-21	kworker/u16:2+flush-8:0	20:02:43	6
1938804	99	34	32,2	cyclictest	1948489	-21	kworker/u16:1+flush-8:0	16:07:07	5
1938813	99	33	28,4	cyclictest	2407333	-21	latency_hist	19:12:43	7
1938802	99	33	31,2	cyclictest	2386977	-21	kworker/u16:4+events_unbound	20:14:05	4
1938802	99	33	31,2	cyclictest	2286134	-21	kworker/u16:4+events_unbound	18:19:43	4
1938802	99	33	31,2	cyclictest	2093236	-21	kworker/u16:5+events_unbound	16:56:09	4
1938804	99	32	29,2	cyclictest	2346742	-21	kworker/u16:2+flush-8:0	19:22:45	5
1938802	99	32	30,2	cyclictest	2447668	-21	kworker/u16:3+events_unbound	19:43:18	4
1938802	99	32	30,2	cyclictest	2365983	-21	kworker/u16:0+events_unbound	19:10:09	4
1938802	99	32	30,2	cyclictest	2271160	-21	kworker/u16:3+flush-8:0	18:11:36	4
1938802	99	32	30,2	cyclictest	2271160	-21	kworker/u16:3+flush-8:0	18:11:36	4
1938802	99	32	30,2	cyclictest	2255085	-21	kworker/u16:2+events_unbound	18:06:28	4
1938802	99	32	29,3	cyclictest	2271160	-21	kworker/u16:3+events_unbound	18:56:47	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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