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 Fri Aug 07, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1908333	2	71	0,1	sleep7	1908331	-21	ssh	10:41:30	7
1439064	99	59	56,2	cyclictest	1796674	-21	kworker/u16:1+events_unbound	09:54:18	4
1438762	2	57	46,8	sleep4	0	-21	swapper/4	07:08:13	4
1438511	2	52	17,30	sleep7	0	-21	swapper/7	07:04:39	7
1439074	99	50	45,4	cyclictest	1823627	-21	latency_hist	10:08:24	7
1439068	99	45	42,2	cyclictest	1762239	-21	kworker/u16:1+events_unbound	09:48:43	5
1439073	99	43	40,2	cyclictest	1598411	-21	kworker/u16:2+flush-8:0	08:33:25	6
1439073	99	42	40,2	cyclictest	1569536	-21	kworker/u16:1+flush-8:0	08:28:25	6
1439073	99	42	39,3	cyclictest	1598411	-21	kworker/u16:2+flush-8:0	09:03:24	6
1439073	99	42	39,3	cyclictest	1598411	-21	kworker/u16:2+flush-8:0	09:03:24	6
1438678	2	42	32,7	sleep5	0	-21	swapper/5	07:07:01	5
1438679	2	39	28,8	sleep6	0	-21	swapper/6	07:07:02	6
1439074	99	36	34,1	cyclictest	1676187	-21	diskmemload	10:45:06	7
1439074	99	35	34,0	cyclictest	0	-21	swapper/7	10:31:39	7
1439074	99	35	34,0	cyclictest	0	-21	swapper/7	09:52:11	7
1439074	99	35	33,1	cyclictest	1676187	-21	diskmemload	10:56:26	7
1439074	99	35	33,1	cyclictest	1676187	-21	diskmemload	10:56:26	7
1439073	99	35	33,2	cyclictest	1796798	-21	kworker/u16:4+events_unbound	09:58:47	6
1439073	99	35	31,3	cyclictest	2105398	-21	kworker/u16:3+flush-8:0	12:18:39	6
1439064	99	35	32,2	cyclictest	1598411	-21	kworker/u16:2+flush-8:0	08:33:43	4
1439074	99	34	32,1	cyclictest	2080663	-21	ssh	11:53:07	7
1439068	99	34	31,2	cyclictest	1688372	-21	kworker/u16:0+flush-8:0	11:58:31	5
1439068	99	34	31,2	cyclictest	1688372	-21	kworker/u16:0+flush-8:0	11:33:30	5
1439068	99	34	31,2	cyclictest	1688372	-21	kworker/u16:0+flush-8:0	11:33:30	5
1439074	99	33	32,0	cyclictest	0	-21	swapper/7	11:35:18	7
1439074	99	33	32,0	cyclictest	0	-21	swapper/7	11:35:18	7
1439074	99	33	32,0	cyclictest	0	-21	swapper/7	11:00:23	7
1439074	99	33	31,1	cyclictest	2141775	-21	ssh	12:17:53	7
1439074	99	33	30,2	cyclictest	2190050	-21	ssh	12:36:46	7
1439074	99	33	28,4	cyclictest	1762198	-21	latency_hist	09:43:24	7
1439074	99	32	31,0	cyclictest	0	-21	swapper/7	11:41:27	7
1439074	99	32	31,0	cyclictest	0	-21	swapper/7	11:25:22	7
1439074	99	32	31,0	cyclictest	0	-21	swapper/7	09:21:55	7
1439074	99	32	31,0	cyclictest	0	-21	swapper/7	09:11:00	7
1439074	99	32	30,1	cyclictest	1967635	-21	ntpq	11:03:52	7
1439074	99	32	30,1	cyclictest	0	-21	swapper/7	09:37:06	7
1439074	99	32	30,1	cyclictest	0	-21	swapper/7	09:37:06	7
1439074	99	31	30,0	cyclictest	0	-21	swapper/7	12:02:57	7
1439074	99	31	30,0	cyclictest	0	-21	swapper/7	10:52:51	7
1439074	99	31	30,0	cyclictest	0	-21	swapper/7	10:27:43	7
1439074	99	31	29,1	cyclictest	0	-21	swapper/7	07:17:18	7
1439074	99	30	29,0	cyclictest	0	-21	swapper/7	10:11:51	7
1439068	99	30	29,1	cyclictest	1796798	-21	kworker/u16:4+events_unbound	10:08:47	5
1439068	99	30	27,2	cyclictest	1569536	-21	kworker/u16:1+events_unbound	08:28:38	5
1439074	99	29	28,0	cyclictest	0	-21	swapper/7	11:31:57	7
1439074	99	29	24,4	cyclictest	1700598	-21	latency_hist	09:18:25	7
1439073	99	29	27,2	cyclictest	1491165	-21	kworker/u16:3+flush-8:0	07:53:25	6
1439068	99	29	27,2	cyclictest	2105398	-21	kworker/u16:3+events_unbound	12:18:47	5
1439068	99	29	27,2	cyclictest	1796798	-21	kworker/u16:4+flush-8:0	10:18:43	5
1439064	99	29	27,2	cyclictest	1646588	-21	kworker/u16:3+flush-8:0	09:09:13	4
1439074	99	28	27,0	cyclictest	0	-21	swapper/7	07:08:52	7
1439074	99	28	26,1	cyclictest	2105790	-21	ssh	12:03:30	7
1439073	99	28	23,4	cyclictest	1580062	-21	iostat_ios	08:18:40	6
1439068	99	28	26,2	cyclictest	1796798	-21	kworker/u16:4+flush-8:0	09:58:38	5
1439068	99	28	26,2	cyclictest	1688372	-21	kworker/u16:0+flush-8:0	09:33:52	5
1439068	99	28	26,2	cyclictest	1688372	-21	kworker/u16:0+flush-8:0	09:33:52	5
1439074	99	27	26,0	cyclictest	0	-21	swapper/7	12:31:50	7
1439074	99	27	26,0	cyclictest	0	-21	swapper/7	09:31:59	7
1439073	99	27	25,2	cyclictest	1598411	-21	kworker/u16:2+flush-8:0	08:53:55	6
1439073	99	27	24,2	cyclictest	1461933	-21	kworker/u16:0+flush-8:0	07:23:45	6
1439068	99	27	24,2	cyclictest	1598411	-21	kworker/u16:2+flush-8:0	08:33:39	5
1439064	99	27	25,2	cyclictest	1688372	-21	kworker/u16:0+flush-8:0	09:43:52	4
1439074	99	26	25,0	cyclictest	0	-21	swapper/7	12:26:22	7
1439074	99	26	25,0	cyclictest	0	-21	swapper/7	10:36:58	7
1439073	99	26	24,2	cyclictest	2091006	-21	kworker/u16:2+flush-8:0	11:58:19	6
1439073	99	26	24,2	cyclictest	1365466	-21	kworker/u16:3+events_unbound	07:13:29	6
1439068	99	26	24,2	cyclictest	1688372	-21	kworker/u16:0+flush-8:0	10:08:20	5
1439074	99	25	0,23	cyclictest	2068511	-21	latency_hist	11:48:24	7
1439068	99	25	23,2	cyclictest	1995724	-21	kworker/u16:4+flush-8:0	11:28:54	5
1439064	99	25	21,3	cyclictest	1835705	-21	kworker/u16:1+flush-8:0	10:43:25	4
1439074	99	24	23,0	cyclictest	0	-21	swapper/7	12:08:29	7
1439074	99	24	23,0	cyclictest	0	-21	swapper/7	08:18:36	7
1439074	99	24	22,1	cyclictest	1722837	-21	ssh	09:24:06	7
1439074	99	24	22,1	cyclictest	1676187	-21	diskmemload	11:10:52	7
1439073	99	24	22,2	cyclictest	1539703	-21	kworker/u16:0+flush-8:0	08:08:20	6
1439064	99	24	20,3	cyclictest	1688372	-21	kworker/u16:0+flush-8:0	11:18:42	4
1439074	99	23	22,0	cyclictest	0	-21	swapper/7	08:57:35	7
1439074	99	23	22,0	cyclictest	0	-21	swapper/7	07:20:55	7
1439073	99	23	21,2	cyclictest	1688372	-21	kworker/u16:0+flush-8:0	09:43:30	6
1439073	99	23	21,2	cyclictest	1646588	-21	kworker/u16:3+events_unbound	09:18:38	6
1439068	99	23	21,2	cyclictest	2091006	-21	kworker/u16:2+events_unbound	12:23:54	5
1439074	99	22	21,0	cyclictest	0	-21	swapper/7	09:46:21	7
1439074	99	22	21,0	cyclictest	0	-21	swapper/7	08:49:36	7
1439074	99	22	18,3	cyclictest	2093035	-21	ssh	11:58:21	7
1439073	99	22	20,2	cyclictest	1860751	-21	kworker/u16:3+flush-8:0	10:43:48	6
1439073	99	22	20,2	cyclictest	1796798	-21	kworker/u16:4+events_unbound	10:13:52	6
1439073	99	22	20,2	cyclictest	1796798	-21	kworker/u16:4+events_unbound	10:13:52	6
1439068	99	22	20,2	cyclictest	2044201	-21	kworker/u16:1+events_unbound	11:43:48	5
1439068	99	22	20,2	cyclictest	1848198	-21	kworker/u16:2+events_unbound	10:58:37	5
1439068	99	22	20,2	cyclictest	1688372	-21	kworker/u16:0+flush-8:0	11:18:19	5
1439068	99	22	20,2	cyclictest	1491165	-21	kworker/u16:3+events_unbound	07:58:50	5
1439073	99	21	18,2	cyclictest	1688372	-21	kworker/u16:0+flush-8:0	12:08:35	6
1439074	99	20	19,0	cyclictest	0	-21	swapper/7	08:39:40	7
1439074	99	20	18,1	cyclictest	0	-21	swapper/7	07:58:35	7
1439068	99	20	18,2	cyclictest	1688372	-21	kworker/u16:0+flush-8:0	12:08:47	5
1439068	99	20	18,2	cyclictest	1646588	-21	kworker/u16:3+flush-8:0	09:08:50	5
1439068	99	20	17,2	cyclictest	1437300	-21	kworker/u16:2+flush-8:0	07:17:58	5
1439074	99	19	18,0	cyclictest	0	-21	swapper/7	10:16:54	7
1439074	99	19	18,0	cyclictest	0	-21	swapper/7	10:16:54	7
1439074	99	19	16,2	cyclictest	0	-21	swapper/7	08:58:49	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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