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 Thu Aug 13, 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
903819	2	56	46,7	sleep4	0	-21	swapper/4	07:06:40	4
903175	2	48	5,32	sleep7	0	-21	swapper/7	07:03:38	7
894599	2	45	34,7	sleep5	0	-21	swapper/5	07:03:04	5
904212	99	43	40,2	cyclictest	946544	-21	kworker/u16:1+flush-8:0	07:28:01	6
904203	99	43	41,2	cyclictest	1346942	-21	kworker/u16:2+flush-8:0	10:33:32	4
904203	99	40	37,2	cyclictest	1410659	-21	kworker/u16:4+flush-8:0	11:19:21	4
904203	99	38	36,2	cyclictest	1155869	-21	kworker/u16:5+events_unbound	09:14:13	4
904203	99	38	35,2	cyclictest	1074336	-21	kworker/u16:3+events_unbound	09:23:02	4
904203	99	35	33,2	cyclictest	1016356	-21	kworker/u16:2+events_unbound	09:28:01	4
904203	99	34	32,2	cyclictest	946544	-21	kworker/u16:1+flush-8:0	08:03:01	4
904212	99	33	31,2	cyclictest	1188075	-21	kworker/u16:1+events_unbound	09:53:24	6
904203	99	33	31,2	cyclictest	1599225	-21	kworker/u16:5+events_unbound	12:26:09	4
904203	99	33	31,2	cyclictest	1410659	-21	kworker/u16:4+events_unbound	12:05:24	4
904203	99	33	31,2	cyclictest	1261138	-21	kworker/u16:3+flush-8:0	09:54:52	4
904203	99	33	31,2	cyclictest	1175634	-21	kworker/u16:0+events_unbound	10:12:56	4
904217	99	32	26,5	cyclictest	648	-21	systemd-journal	10:16:53	7
904207	99	32	29,2	cyclictest	1188075	-21	kworker/u16:1+flush-8:0	10:18:29	5
904203	99	32	30,2	cyclictest	1631195	-21	kworker/u16:3+events_unbound	12:34:45	4
904203	99	32	30,2	cyclictest	1310900	-21	kworker/u16:4+events_unbound	10:20:53	4
904203	99	31	29,2	cyclictest	1520007	-21	kworker/u16:0+events_unbound	12:08:36	4
904203	99	31	29,2	cyclictest	1310900	-21	kworker/u16:4+events_unbound	10:44:57	4
904203	99	31	29,2	cyclictest	1016356	-21	kworker/u16:2+flush-8:0	09:47:52	4
904203	99	31	28,2	cyclictest	1384699	-21	kworker/u16:1+events_unbound	11:58:07	4
903767	2	31	21,7	sleep6	0	-21	swapper/6	07:05:53	6
904217	99	30	28,1	cyclictest	0	-21	swapper/7	07:13:05	7
904212	99	30	27,2	cyclictest	1188075	-21	kworker/u16:1+flush-8:0	10:18:16	6
904207	99	30	28,2	cyclictest	1410659	-21	kworker/u16:4+flush-8:0	11:53:29	5
904203	99	30	28,2	cyclictest	1530629	-21	kworker/u16:3+events_unbound	11:50:12	4
904203	99	30	28,2	cyclictest	1214453	-21	kworker/u16:3+events_unbound	09:41:56	4
904203	99	30	28,2	cyclictest	1016356	-21	kworker/u16:2+events_unbound	09:30:57	4
904212	99	29	27,2	cyclictest	1188075	-21	kworker/u16:1+events_unbound	10:23:24	6
904212	99	29	26,2	cyclictest	1410659	-21	kworker/u16:4+events_unbound	11:28:15	6
904203	99	29	27,2	cyclictest	956399	-21	kworker/u16:2+events_unbound	07:43:32	4
904203	99	29	27,2	cyclictest	1410659	-21	kworker/u16:4+flush-8:0	11:06:33	4
904203	99	29	27,2	cyclictest	1408474	-21	kworker/u16:0+events_unbound	10:54:28	4
904203	99	29	27,2	cyclictest	1408474	-21	kworker/u16:0+events_unbound	10:54:28	4
904212	99	28	24,3	cyclictest	1175634	-21	kworker/u16:0+events_unbound	09:23:14	6
904203	99	28	26,2	cyclictest	1471238	-21	kworker/u16:0+events_unbound	11:32:52	4
904203	99	28	26,2	cyclictest	1188075	-21	kworker/u16:1+events_unbound	10:25:29	4
904203	99	28	26,2	cyclictest	1016356	-21	kworker/u16:2+events_unbound	09:49:12	4
904217	99	27	21,5	cyclictest	648	-21	systemd-journal	09:03:01	7
904217	99	27	21,5	cyclictest	648	-21	systemd-journal	09:03:01	7
904203	99	27	25,2	cyclictest	1520007	-21	kworker/u16:0+flush-8:0	11:44:16	4
904203	99	27	25,2	cyclictest	1520007	-21	kworker/u16:0+events_unbound	11:41:40	4
904203	99	27	25,2	cyclictest	1471238	-21	kworker/u16:0+flush-8:0	11:25:19	4
904203	99	27	25,2	cyclictest	1384699	-21	kworker/u16:1+flush-8:0	10:59:00	4
904203	99	27	25,2	cyclictest	1346942	-21	kworker/u16:2+events_unbound	10:32:13	4
904203	99	27	25,2	cyclictest	1016356	-21	kworker/u16:2+events_unbound	10:13:41	4
1357047	2	27	0,1	chrt	1357052	-21	sh	10:33:24	7
904217	99	26	25,0	cyclictest	0	-21	swapper/7	11:33:29	7
904207	99	26	24,2	cyclictest	1410659	-21	kworker/u16:4+events_unbound	12:03:17	5
904207	99	26	24,2	cyclictest	1410659	-21	kworker/u16:4+events_unbound	11:13:14	5
904207	99	26	23,2	cyclictest	1102253	-21	kworker/u16:1+flush-8:0	08:48:16	5
904203	99	26	24,2	cyclictest	839634	-21	kworker/u16:4+flush-8:0	07:33:28	4
904203	99	26	24,2	cyclictest	1384699	-21	kworker/u16:1+events_unbound	10:51:20	4
904203	99	26	24,2	cyclictest	1131857	-21	kworker/u16:4+flush-8:0	09:07:56	4
904203	99	26	24,2	cyclictest	1016356	-21	kworker/u16:2+events_unbound	10:00:28	4
904212	99	25	23,2	cyclictest	1074336	-21	kworker/u16:3+events_unbound	08:38:17	6
904203	99	25	23,2	cyclictest	1496852	-21	kworker/u16:2+flush-8:0	11:35:33	4
904203	99	25	23,2	cyclictest	1410659	-21	kworker/u16:4+events_unbound	12:16:33	4
904203	99	25	23,2	cyclictest	1386505	-21	kworker/u16:5+events_unbound	11:10:04	4
904203	99	25	23,2	cyclictest	1384699	-21	kworker/u16:1+flush-8:0	11:15:25	4
904203	99	25	23,2	cyclictest	1175634	-21	kworker/u16:0+events_unbound	09:33:41	4
904203	99	25	23,2	cyclictest	1175634	-21	kworker/u16:0+events_unbound	09:33:41	4
904203	99	25	23,2	cyclictest	1151118	-21	kworker/u16:0+events_unbound	09:10:53	4
904203	99	24	22,2	cyclictest	1615624	-21	kworker/u16:0+events_unbound	12:22:44	4
904203	99	24	22,2	cyclictest	1346942	-21	kworker/u16:2+flush-8:0	10:39:45	4
904203	99	23	21,2	cyclictest	946544	-21	kworker/u16:1+events_unbound	07:25:37	4
904203	99	22	21,1	cyclictest	1175634	-21	kworker/u16:0+events_unbound	10:04:13	4
904203	99	22	20,2	cyclictest	1384699	-21	kworker/u16:1+events_unbound	11:53:51	4
904217	99	21	20,0	cyclictest	0	-21	swapper/7	09:58:15	7
904217	99	21	20,0	cyclictest	0	-21	swapper/7	08:33:16	7
904203	99	21	19,2	cyclictest	1628709	-21	kworker/u16:2+events_unbound	12:30:59	4
904203	99	20	17,2	cyclictest	839634	-21	kworker/u16:4+events_unbound	07:28:15	4
904217	99	19	13,5	cyclictest	1652131	-21	ssh	12:33:27	7
904212	99	19	17,2	cyclictest	1016356	-21	kworker/u16:2+events_unbound	09:43:28	6
904207	99	19	17,1	cyclictest	903675	-21	kworker/u16:2+flush-8:0	07:08:18	5
904207	99	19	15,3	cyclictest	1188075	-21	kworker/u16:1+flush-8:0	09:28:15	5
904217	99	18	16,1	cyclictest	1141191	-21	diskmemload	11:48:30	7
904217	99	18	12,5	cyclictest	648	-21	systemd-journal	09:53:02	7
904217	99	18	12,5	cyclictest	1594049	-21	latency_hist	12:13:01	7
904217	99	18	0,16	cyclictest	1615402	-21	sh	12:18:25	7
904212	99	17	15,2	cyclictest	1016356	-21	kworker/u16:2+events_unbound	08:33:14	6
904203	99	17	15,2	cyclictest	994955	-21	kworker/u16:0+flush-8:0	07:53:27	4
904203	99	17	15,2	cyclictest	839634	-21	kworker/u16:4+flush-8:0	08:03:20	4
904203	99	17	15,2	cyclictest	1074336	-21	kworker/u16:3+flush-8:0	08:38:49	4
904217	99	16	13,2	cyclictest	1302	-21	snmpd	09:09:00	7
904217	99	16	13,2	cyclictest	0	-21	swapper/7	09:13:02	7
904217	99	16	12,3	cyclictest	1302	-21	snmpd	07:54:56	7
904212	99	16	14,2	cyclictest	946544	-21	kworker/u16:1+flush-8:0	07:59:32	6
904212	99	16	14,2	cyclictest	839634	-21	kworker/u16:4+events_unbound	08:03:14	6
904212	99	16	14,2	cyclictest	1175634	-21	kworker/u16:0+flush-8:0	10:28:29	6
904212	99	16	0,2	cyclictest	905989	-21	kthreadcore	07:08:18	6
904207	99	16	14,2	cyclictest	1410659	-21	kworker/u16:4+events_unbound	11:23:25	5
904203	99	16	13,2	cyclictest	839634	-21	kworker/u16:4+flush-8:0	07:38:20	4
904217	99	15	13,1	cyclictest	1435621	-21	ssh	11:08:06	7
904217	99	15	13,1	cyclictest	0	-21	swapper/7	11:38:13	7
904217	99	15	13,1	cyclictest	0	-21	swapper/7	09:18:26	7
904217	99	15	0,13	cyclictest	1398369	-21	latency_hist	10:53:01	7
904212	99	15	13,2	cyclictest	1188075	-21	kworker/u16:1+events_unbound	10:08:29	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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