OSADL QA Farm on Real-time of Mainline Linux

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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 Tue Feb 03, 2026 00:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2291118	2	101	0,1	sleep7	2291117	-21	ssh	23:49:24	7
2084537	2	94	0,1	sleep6	0	-21	swapper/6	22:21:55	6
2310613	2	93	0,0	sleep5	0	-21	swapper/5	23:56:52	5
2003914	2	91	0,1	sleep5	0	-21	swapper/5	21:51:41	5
1659040	2	56	46,7	sleep4	0	-21	swapper/4	19:04:17	4
1659040	2	56	46,7	sleep4	0	-21	swapper/4	19:04:17	4
1658976	2	56	22,30	sleep7	0	-21	swapper/7	19:03:24	7
1658976	2	56	22,30	sleep7	0	-21	swapper/7	19:03:24	7
1659041	2	55	45,7	sleep5	0	-21	swapper/5	19:04:18	5
1659041	2	55	45,7	sleep5	0	-21	swapper/5	19:04:18	5
1659483	99	51	45,5	cyclictest	1730857	-21	latency_hist	19:41:28	7
1659475	99	50	47,2	cyclictest	1875767	-21	kworker/u16:4+events_unbound	21:01:42	5
1659475	99	49	47,2	cyclictest	2217865	-21	kworker/u16:0+flush-8:0	23:46:57	5
1659475	99	49	46,2	cyclictest	2217865	-21	kworker/u16:0+events_unbound	23:36:44	5
1659475	99	49	46,2	cyclictest	2217865	-21	kworker/u16:0+events_unbound	23:36:44	5
1659483	99	48	47,0	cyclictest	0	-21	swapper/7	20:16:57	7
1659475	99	47	45,2	cyclictest	2217865	-21	kworker/u16:0+events_unbound	23:21:45	5
1659483	99	46	43,2	cyclictest	2061152	-21	uptime	22:12:01	7
1659475	99	46	44,2	cyclictest	2217865	-21	kworker/u16:0+events_unbound	00:27:00	5
1659475	99	45	42,2	cyclictest	1908742	-21	kworker/u16:1+flush-8:0	21:21:59	5
1659475	99	43	41,2	cyclictest	1736572	-21	kworker/u16:0+events_unbound	20:11:56	5
1659483	99	42	32,3	cyclictest	1929379	-21	ssh	21:18:13	7
1659483	99	41	40,0	cyclictest	0	-21	swapper/7	23:36:09	7
1659475	99	41	39,2	cyclictest	2182065	-21	kworker/u16:3+events_unbound	23:06:09	5
1659475	99	41	39,2	cyclictest	1954309	-21	kworker/u16:2+events_unbound	21:47:00	5
1659475	99	41	39,2	cyclictest	1595925	-21	kworker/u16:4+flush-8:0	20:06:52	5
1659475	99	40	38,2	cyclictest	2313348	-21	kworker/u16:3+events_unbound	00:07:58	5
1659475	99	40	38,2	cyclictest	2256472	-21	kworker/u16:4+events_unbound	23:54:37	5
1659475	99	40	38,2	cyclictest	2217865	-21	kworker/u16:0+events_unbound	00:03:58	5
1659475	99	40	38,2	cyclictest	1908742	-21	kworker/u16:1+events_unbound	22:30:39	5
1659475	99	39	37,2	cyclictest	1895469	-21	kworker/u16:2+events_unbound	21:06:49	5
1659475	99	39	37,2	cyclictest	1789190	-21	kworker/u16:1+flush-8:0	20:16:55	5
1659483	99	38	37,0	cyclictest	0	-21	swapper/7	21:48:34	7
1659475	99	38	36,2	cyclictest	2184262	-21	kworker/u16:4+events_unbound	23:08:18	5
1659483	99	37	34,2	cyclictest	1951992	-21	memory	21:26:54	7
1659475	99	37	35,2	cyclictest	2305277	-21	kworker/u16:1+events_unbound	00:16:28	5
1659475	99	37	35,2	cyclictest	1908742	-21	kworker/u16:1+events_unbound	21:19:05	5
1659475	99	37	35,2	cyclictest	1850752	-21	kworker/u16:0+events_unbound	23:01:06	5
1659475	99	37	35,2	cyclictest	1850752	-21	kworker/u16:0+events_unbound	23:01:06	5
1659475	99	37	35,2	cyclictest	1850752	-21	kworker/u16:0+events_unbound	22:43:54	5
1659475	99	37	34,2	cyclictest	2160162	-21	kworker/u16:1+flush-8:0	23:11:59	5
1659483	99	36	35,0	cyclictest	0	-21	swapper/7	23:10:58	7
1659483	99	36	35,0	cyclictest	0	-21	swapper/7	00:11:16	7
1659483	99	36	32,3	cyclictest	124	-21	kswapd0	23:11:42	7
1659483	99	36	31,4	cyclictest	2362893	-21	taskset	00:18:31	7
1659475	99	36	35,1	cyclictest	1908742	-21	kworker/u16:1+flush-8:0	22:06:28	5
1659475	99	36	34,2	cyclictest	2244114	-21	kworker/u16:2+events_unbound	23:33:33	5
1659475	99	36	34,2	cyclictest	2217865	-21	kworker/u16:0+flush-8:0	00:21:58	5
1659475	99	36	34,2	cyclictest	2217865	-21	kworker/u16:0+events_unbound	23:42:34	5
1659475	99	36	34,2	cyclictest	1954309	-21	kworker/u16:2+events_unbound	22:20:53	5
1659475	99	36	34,2	cyclictest	1954309	-21	kworker/u16:2+events_unbound	21:46:09	5
1659475	99	36	34,2	cyclictest	1931289	-21	kworker/u16:4+events_unbound	21:29:01	5
1659475	99	36	34,2	cyclictest	1908742	-21	kworker/u16:1+events_unbound	22:23:58	5
1659475	99	36	34,2	cyclictest	1908742	-21	kworker/u16:1+events_unbound	22:16:05	5
1659475	99	36	34,2	cyclictest	1850752	-21	kworker/u16:0+events_unbound	22:00:25	5
1659475	99	36	34,2	cyclictest	1759868	-21	kworker/u16:3+events_unbound	20:26:55	5
1659475	99	36	34,2	cyclictest	1393861	-21	kworker/u16:1+events_unbound	19:07:01	5
1659475	99	36	33,2	cyclictest	1595925	-21	kworker/u16:4+events_unbound	19:41:30	5
1659078	2	36	26,7	sleep6	0	-21	swapper/6	19:04:51	6
1659078	2	36	26,7	sleep6	0	-21	swapper/6	19:04:51	6
1659483	99	35	34,0	cyclictest	0	-21	swapper/7	23:20:54	7
1659483	99	35	34,0	cyclictest	0	-21	swapper/7	23:04:37	7
1659483	99	35	34,0	cyclictest	0	-21	swapper/7	22:59:42	7
1659483	99	35	34,0	cyclictest	0	-21	swapper/7	22:59:42	7
1659483	99	35	34,0	cyclictest	0	-21	swapper/7	22:19:42	7
1659483	99	35	0,33	cyclictest	1826470	-21	nfs_client	20:26:53	7
1659475	99	35	33,2	cyclictest	2305277	-21	kworker/u16:1+events_unbound	00:34:49	5
1659475	99	35	33,2	cyclictest	2160162	-21	kworker/u16:1+events_unbound	23:30:27	5
1659475	99	35	33,2	cyclictest	2160162	-21	kworker/u16:1+events_unbound	23:20:50	5
1659475	99	35	33,2	cyclictest	2135833	-21	kworker/u16:5+events_unbound	22:51:14	5
1659475	99	35	33,2	cyclictest	1954309	-21	kworker/u16:2+events_unbound	21:32:46	5
1659475	99	35	33,2	cyclictest	1850752	-21	kworker/u16:0+events_unbound	22:40:21	5
1659475	99	35	33,2	cyclictest	1595925	-21	kworker/u16:4+events_unbound	20:01:58	5
1659473	99	35	33,2	cyclictest	2160162	-21	kworker/u16:1+flush-8:0	23:12:09	4
1659483	99	34	33,0	cyclictest	0	-21	swapper/7	21:40:33	7
1659483	99	34	33,0	cyclictest	0	-21	swapper/7	21:40:33	7
1659483	99	34	33,0	cyclictest	0	-21	swapper/7	00:00:52	7
1659475	99	34	32,2	cyclictest	2099997	-21	kworker/u16:2+events_unbound	22:55:34	5
1659475	99	34	32,2	cyclictest	1954309	-21	kworker/u16:2+events_unbound	21:38:05	5
1659475	99	34	32,2	cyclictest	1954309	-21	kworker/u16:2+events_unbound	21:38:05	5
1659475	99	34	32,2	cyclictest	1691251	-21	kworker/u16:2+events_unbound	19:52:03	5
1659483	99	33	33,0	cyclictest	0	-21	swapper/7	22:53:50	7
1659483	99	33	33,0	cyclictest	0	-21	swapper/7	22:03:33	7
1659483	99	33	33,0	cyclictest	0	-21	swapper/7	21:59:29	7
1659483	99	33	32,0	cyclictest	0	-21	swapper/7	23:31:06	7
1659483	99	33	32,0	cyclictest	0	-21	swapper/7	22:34:33	7
1659483	99	33	32,0	cyclictest	0	-21	swapper/7	21:55:13	7
1659483	99	33	32,0	cyclictest	0	-21	swapper/7	21:43:25	7
1659483	99	33	29,3	cyclictest	1738386	-21	kthreadcore	19:41:50	7
1659475	99	33	31,2	cyclictest	1850752	-21	kworker/u16:0+events_unbound	21:15:54	5
1659473	99	33	31,2	cyclictest	1789190	-21	kworker/u16:1+flush-8:0	20:26:59	4
1659483	99	32	32,0	cyclictest	0	-21	swapper/7	23:44:25	7
1659480	99	32	30,2	cyclictest	1722418	-21	kworker/u16:1+flush-8:0	19:46:52	6
1659475	99	32	30,2	cyclictest	2313348	-21	kworker/u16:3+events_unbound	00:13:05	5
1659475	99	32	30,2	cyclictest	1908742	-21	kworker/u16:1+events_unbound	22:07:45	5
1659475	99	32	30,2	cyclictest	1691251	-21	kworker/u16:2+events_unbound	19:34:38	5
1659483	99	31	31,0	cyclictest	0	-21	swapper/7	22:40:53	7
1659483	99	31	30,0	cyclictest	0	-21	swapper/7	21:32:50	7
1659483	99	31	30,0	cyclictest	0	-21	swapper/7	21:08:26	7
1659483	99	31	30,0	cyclictest	0	-21	swapper/7	00:28:20	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17