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 Aug 20, 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
1743714	2	56	22,29	sleep7	0	-21	swapper/7	07:06:05	7
1743803	2	54	43,8	sleep4	0	-21	swapper/4	07:07:22	4
1743588	2	45	35,7	sleep5	0	-21	swapper/5	07:04:18	5
1744105	99	41	39,2	cyclictest	2358743	-21	kworker/u16:3+events_unbound	12:08:10	4
1744105	99	36	34,2	cyclictest	2334167	-21	kworker/u16:2+events_unbound	11:34:53	4
1744105	99	36	34,2	cyclictest	2139311	-21	kworker/u16:3+events_unbound	10:46:05	4
1744105	99	36	34,2	cyclictest	1951666	-21	kworker/u16:2+events_unbound	11:07:29	4
1744105	99	35	33,2	cyclictest	2419016	-21	kworker/u16:0+flush-8:0	12:13:12	4
1744105	99	35	33,2	cyclictest	2235210	-21	kworker/u16:0+events_unbound	10:51:30	4
1744122	99	34	29,4	cyclictest	648	-21	systemd-journal	10:22:29	7
1744105	99	34	32,2	cyclictest	2467608	-21	kworker/u16:0+events_unbound	12:27:17	4
1744105	99	34	32,2	cyclictest	2176419	-21	kworker/u16:4+events_unbound	10:35:18	4
1744105	99	33	31,2	cyclictest	2372553	-21	kworker/u16:4+events_unbound	11:59:22	4
1744105	99	33	31,2	cyclictest	2176419	-21	kworker/u16:4+events_unbound	10:58:30	4
1744105	99	33	31,2	cyclictest	2126793	-21	kworker/u16:0+events_unbound	10:10:49	4
1744105	99	33	31,2	cyclictest	2113044	-21	kworker/u16:1+events_unbound	10:16:17	4
1744105	99	33	31,2	cyclictest	1874113	-21	kworker/u16:4+events_unbound	09:34:02	4
1743578	2	33	23,7	sleep6	0	-21	swapper/6	07:04:11	6
1744113	99	32	30,2	cyclictest	2176419	-21	kworker/u16:4+flush-8:0	10:58:01	5
1744113	99	32	30,2	cyclictest	2076948	-21	kworker/u16:0+events_unbound	09:58:01	5
1744105	99	32	31,1	cyclictest	2372553	-21	kworker/u16:4+events_unbound	12:04:58	4
1744105	99	32	30,2	cyclictest	2358743	-21	kworker/u16:3+events_unbound	11:46:58	4
1744105	99	32	30,2	cyclictest	2297891	-21	kworker/u16:1+events_unbound	11:42:26	4
1744105	99	32	30,2	cyclictest	2297891	-21	kworker/u16:1+events_unbound	11:29:38	4
1744105	99	32	30,2	cyclictest	2250193	-21	kworker/u16:3+flush-8:0	11:15:26	4
1744105	99	32	30,2	cyclictest	1951666	-21	kworker/u16:2+events_unbound	10:38:49	4
1744105	99	32	30,2	cyclictest	1951666	-21	kworker/u16:2+events_unbound	09:58:22	4
1744105	99	32	30,2	cyclictest	1951666	-21	kworker/u16:2+events_unbound	09:14:06	4
1744105	99	32	30,2	cyclictest	1941764	-21	kworker/u16:0+events_unbound	09:29:38	4
1744105	99	32	29,2	cyclictest	1951666	-21	kworker/u16:2+events_unbound	10:52:38	4
1744122	99	31	0,29	cyclictest	2335467	-21	latency_hist	11:32:34	7
1744105	99	31	29,2	cyclictest	2372126	-21	kworker/u16:2+events_unbound	11:51:41	4
1744105	99	31	29,2	cyclictest	2297891	-21	kworker/u16:1+events_unbound	11:27:33	4
1744105	99	31	29,2	cyclictest	2052245	-21	kworker/u16:1+flush-8:0	09:48:33	4
1744105	99	31	29,2	cyclictest	1874113	-21	kworker/u16:4+events_unbound	09:18:46	4
1744105	99	30	29,1	cyclictest	1874113	-21	kworker/u16:4+events_unbound	09:23:41	4
1744105	99	30	28,2	cyclictest	2467608	-21	kworker/u16:0+events_unbound	12:31:41	4
1744105	99	30	28,2	cyclictest	2139311	-21	kworker/u16:3+flush-8:0	10:18:21	4
1744105	99	30	28,2	cyclictest	2113044	-21	kworker/u16:1+events_unbound	10:05:26	4
1744105	99	30	28,2	cyclictest	2113044	-21	kworker/u16:1+events_unbound	10:05:26	4
1744105	99	30	28,2	cyclictest	2076948	-21	kworker/u16:0+events_unbound	09:54:02	4
1744113	99	29	27,2	cyclictest	2284052	-21	kworker/u16:0+flush-8:0	11:28:05	5
1744105	99	29	27,2	cyclictest	2444014	-21	kworker/u16:1+events_unbound	12:17:37	4
1744105	99	29	27,2	cyclictest	2358743	-21	kworker/u16:3+flush-8:0	12:33:21	4
1744105	99	29	27,2	cyclictest	1951666	-21	kworker/u16:2+events_unbound	10:24:14	4
1744105	99	29	27,2	cyclictest	1874113	-21	kworker/u16:4+events_unbound	09:39:54	4
1744105	99	29	26,2	cyclictest	2372553	-21	kworker/u16:4+events_unbound	11:52:36	4
1853831	2	28	0,1	chrt	1853832	-21	cat	07:58:04	7
1744105	99	28	26,2	cyclictest	2176419	-21	kworker/u16:4+events_unbound	10:29:05	4
1744105	99	28	26,2	cyclictest	2052245	-21	kworker/u16:1+events_unbound	09:46:33	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