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 Mon Dec 22, 2025 12:43:31)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
203605	2	52	41,8	sleep4	0	-21	swapper/4	07:09:04	4
203581	2	52	18,30	sleep7	0	-21	swapper/7	07:08:43	7
203920	99	50	44,5	cyclictest	721171	-21	latency_hist	11:34:19	7
203523	2	44	33,8	sleep5	0	-21	swapper/5	07:07:53	5
203485	2	44	34,7	sleep6	0	-21	swapper/6	07:07:21	6
203908	99	43	41,2	cyclictest	401696	-21	kworker/u16:1+flush-8:0	09:04:20	4
203920	99	39	34,4	cyclictest	537007	-21	latency_hist	09:59:19	7
203920	99	39	33,5	cyclictest	314131	-21	latency_hist	08:04:20	7
203920	99	35	29,5	cyclictest	401312	-21	latency_hist	08:49:20	7
203916	99	34	32,2	cyclictest	614571	-21	kworker/u16:3+flush-8:0	10:49:19	6
203908	99	33	29,3	cyclictest	459123	-21	kworker/u16:1+events_unbound	10:09:42	4
203908	99	33	29,3	cyclictest	459123	-21	kworker/u16:1+events_unbound	10:09:42	4
203920	99	32	26,5	cyclictest	650	-21	systemd-journal	10:09:19	7
203916	99	32	30,2	cyclictest	779691	-21	kworker/u16:3+flush-8:0	12:19:18	6
203916	99	32	29,2	cyclictest	401696	-21	kworker/u16:1+events_unbound	08:54:37	6
203915	99	32	30,2	cyclictest	429477	-21	kworker/u16:5+events_unbound	11:29:34	5
203920	99	31	26,4	cyclictest	352840	-21	latency_hist	08:24:19	7
203915	99	31	29,2	cyclictest	459123	-21	kworker/u16:1+events_unbound	09:54:49	5
203915	99	30	28,2	cyclictest	411394	-21	kworker/u16:0+flush-8:0	09:14:14	5
203908	99	30	27,3	cyclictest	711236	-21	kworker/u16:2+flush-8:0	11:54:19	4
203916	99	29	27,2	cyclictest	740625	-21	kworker/u16:1+flush-8:0	11:44:41	6
203915	99	29	27,2	cyclictest	740625	-21	kworker/u16:1+flush-8:0	11:59:34	5
203915	99	28	26,2	cyclictest	429477	-21	kworker/u16:5+flush-8:0	10:24:14	5
203908	99	28	26,2	cyclictest	779691	-21	kworker/u16:3+flush-8:0	12:19:13	4
203908	99	28	26,2	cyclictest	411394	-21	kworker/u16:0+flush-8:0	09:09:43	4
203920	99	27	26,0	cyclictest	0	-21	swapper/7	07:18:11	7
203920	99	26	25,0	cyclictest	0	-21	swapper/7	11:04:39	7
203916	99	26	24,2	cyclictest	594680	-21	kworker/u16:1+flush-8:0	11:00:21	6
203915	99	26	22,3	cyclictest	769948	-21	kworker/u16:0+flush-8:0	12:14:37	5
203920	99	25	24,0	cyclictest	0	-21	swapper/7	12:38:41	7
203920	99	25	24,0	cyclictest	0	-21	swapper/7	10:03:46	7
203920	99	25	24,0	cyclictest	0	-21	swapper/7	07:12:03	7
203916	99	25	23,2	cyclictest	459123	-21	kworker/u16:1+events_unbound	09:19:42	6
203915	99	25	22,2	cyclictest	324233	-21	kworker/u16:3+events_unbound	08:14:34	5
203920	99	24	23,0	cyclictest	0	-21	swapper/7	11:36:38	7
203920	99	24	23,0	cyclictest	0	-21	swapper/7	10:56:46	7
203920	99	24	23,0	cyclictest	0	-21	swapper/7	09:13:03	7
203920	99	24	23,0	cyclictest	0	-21	swapper/7	08:11:47	7
203920	99	24	23,0	cyclictest	0	-21	swapper/7	07:35:46	7
203916	99	24	21,2	cyclictest	459123	-21	kworker/u16:1+flush-8:0	09:48:22	6
203908	99	24	21,2	cyclictest	721404	-21	kworker/u16:0+events_unbound	11:34:45	4
203908	99	24	21,2	cyclictest	246356	-21	kworker/u16:2+events_unbound	08:34:39	4
203908	99	24	21,2	cyclictest	246356	-21	kworker/u16:2+events_unbound	08:34:39	4
203920	99	23	22,0	cyclictest	0	-21	swapper/7	09:48:43	7
203920	99	23	22,0	cyclictest	0	-21	swapper/7	09:33:46	7
203916	99	23	21,2	cyclictest	305551	-21	kworker/u16:1+events_unbound	08:29:46	6
203916	99	23	20,2	cyclictest	390615	-21	kworker/u16:4+events_unbound	08:49:38	6
203915	99	23	20,2	cyclictest	411394	-21	kworker/u16:0+flush-8:0	09:14:37	5
203920	99	22	22,0	cyclictest	0	-21	swapper/7	10:26:34	7
203920	99	22	21,0	cyclictest	0	-21	swapper/7	12:31:37	7
203920	99	22	21,0	cyclictest	0	-21	swapper/7	12:31:37	7
203920	99	22	21,0	cyclictest	0	-21	swapper/7	10:49:22	7
203920	99	22	21,0	cyclictest	0	-21	swapper/7	10:45:26	7
203920	99	22	21,0	cyclictest	0	-21	swapper/7	10:41:27	7
203920	99	22	21,0	cyclictest	0	-21	swapper/7	10:21:06	7
203920	99	22	21,0	cyclictest	0	-21	swapper/7	10:13:53	7
203920	99	22	21,0	cyclictest	0	-21	swapper/7	10:13:53	7
203920	99	22	21,0	cyclictest	0	-21	swapper/7	09:34:49	7
203920	99	22	21,0	cyclictest	0	-21	swapper/7	07:51:01	7
203915	99	22	20,2	cyclictest	779691	-21	kworker/u16:3+flush-8:0	12:19:44	5
203908	99	22	20,2	cyclictest	411394	-21	kworker/u16:0+flush-8:0	09:14:42	4
203908	99	22	19,2	cyclictest	429477	-21	kworker/u16:5+events_unbound	11:09:36	4
203920	99	21	20,0	cyclictest	0	-21	swapper/7	10:37:06	7
203920	99	21	20,0	cyclictest	0	-21	swapper/7	09:25:10	7
203920	99	21	20,0	cyclictest	0	-21	swapper/7	09:05:34	7
203920	99	21	20,0	cyclictest	0	-21	swapper/7	08:41:47	7
203920	99	21	20,0	cyclictest	0	-21	swapper/7	08:28:34	7
203920	99	21	20,0	cyclictest	0	-21	swapper/7	07:55:34	7
203920	99	21	20,0	cyclictest	0	-21	swapper/7	07:48:50	7
203920	99	21	0,19	cyclictest	572307	-21	cut	10:14:39	7
203908	99	21	19,2	cyclictest	769948	-21	kworker/u16:0+flush-8:0	12:24:46	4
203908	99	21	19,2	cyclictest	594680	-21	kworker/u16:1+flush-8:0	10:49:36	4
203920	99	20	20,0	cyclictest	0	-21	swapper/7	08:16:58	7
203920	99	20	19,0	cyclictest	0	-21	swapper/7	12:21:49	7
203920	99	20	19,0	cyclictest	0	-21	swapper/7	11:51:33	7
203920	99	20	19,0	cyclictest	0	-21	swapper/7	08:38:59	7
203920	99	20	19,0	cyclictest	0	-21	swapper/7	08:38:59	7
203920	99	20	19,0	cyclictest	0	-21	swapper/7	07:29:21	7
203915	99	20	18,2	cyclictest	275794	-21	kworker/u16:0+flush-8:0	08:04:34	5
203915	99	20	16,3	cyclictest	605879	-21	kworker/u16:2+flush-8:0	10:59:12	5
203920	99	19	19,0	cyclictest	0	-21	swapper/7	12:13:54	7
203920	99	19	19,0	cyclictest	0	-21	swapper/7	07:21:46	7
203920	99	19	18,0	cyclictest	0	-21	swapper/7	11:15:49	7
203920	99	19	18,0	cyclictest	0	-21	swapper/7	09:23:11	7
203920	99	19	18,0	cyclictest	0	-21	swapper/7	08:52:03	7
203920	99	19	18,0	cyclictest	0	-21	swapper/7	08:07:46	7
203920	99	19	18,0	cyclictest	0	-21	swapper/7	07:40:02	7
203920	99	19	18,0	cyclictest	0	-21	swapper/7	07:27:02	7
203916	99	19	17,2	cyclictest	305551	-21	kworker/u16:1+flush-8:0	07:59:45	6
203916	99	19	17,2	cyclictest	246356	-21	kworker/u16:2+flush-8:0	08:09:39	6
203916	99	19	16,2	cyclictest	711236	-21	kworker/u16:2+flush-8:0	11:54:29	6
203916	99	19	16,2	cyclictest	324233	-21	kworker/u16:3+flush-8:0	08:14:35	6
203915	99	19	17,2	cyclictest	343415	-21	kworker/u16:0+events_unbound	08:24:32	5
203915	99	19	17,2	cyclictest	203651	-21	kworker/u16:1+flush-8:0	07:24:20	5
203915	99	19	15,3	cyclictest	184760	-21	kworker/u16:0+flush-8:0	07:09:35	5
203908	99	19	17,2	cyclictest	594680	-21	kworker/u16:1+flush-8:0	10:29:42	4
203920	99	18	17,0	cyclictest	0	-21	swapper/7	11:00:54	7
203920	99	18	17,0	cyclictest	0	-21	swapper/7	09:54:06	7
203916	99	18	16,2	cyclictest	779691	-21	kworker/u16:3+flush-8:0	12:39:14	6
203916	99	18	16,2	cyclictest	438834	-21	kworker/u16:3+flush-8:0	09:49:39	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