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 Fri Apr 24, 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
3986825	2	51	41,7	sleep4	0	-21	swapper/4	07:06:55	4
3987301	99	43	41,2	cyclictest	515250	-21	kworker/u16:1+events_unbound	12:28:59	5
492634	2	41	0,0	sleep7	492635	-21	sh	12:18:38	7
3987301	99	41	39,2	cyclictest	199343	-21	kworker/u16:4+events_unbound	10:39:52	5
3987301	99	40	37,2	cyclictest	125090	-21	kworker/u16:2+events_unbound	10:04:24	5
3987301	99	39	37,2	cyclictest	282465	-21	kworker/u16:3+events_unbound	12:04:55	5
3986718	2	39	3,31	sleep7	0	-21	swapper/7	07:05:22	7
3987301	99	38	36,2	cyclictest	396485	-21	kworker/u16:1+events_unbound	11:42:28	5
3987301	99	38	36,2	cyclictest	368311	-21	kworker/u16:2+events_unbound	12:00:39	5
3987301	99	38	36,2	cyclictest	368311	-21	kworker/u16:2+events_unbound	11:32:07	5
3987301	99	38	34,3	cyclictest	4039351	-21	kworker/u16:2+events_unbound	08:04:36	5
3987301	99	37	34,2	cyclictest	138207	-21	kworker/u16:1+flush-8:0	10:19:37	5
3987301	99	36	34,2	cyclictest	8211	-21	kworker/u16:2+flush-8:0	09:19:21	5
3987301	99	36	34,2	cyclictest	517588	-21	kworker/u16:4+events_unbound	12:35:40	5
3987301	99	36	34,2	cyclictest	4143793	-21	kworker/u16:1+events_unbound	09:38:48	5
3987301	99	36	34,2	cyclictest	396485	-21	kworker/u16:1+events_unbound	11:57:12	5
3987301	99	36	34,2	cyclictest	396485	-21	kworker/u16:1+events_unbound	11:57:12	5
3987301	99	36	34,2	cyclictest	282465	-21	kworker/u16:3+events_unbound	11:28:07	5
3987301	99	36	34,2	cyclictest	282465	-21	kworker/u16:3+events_unbound	11:00:59	5
3987301	99	36	34,2	cyclictest	233584	-21	kworker/u16:1+events_unbound	10:34:45	5
3987301	99	36	34,2	cyclictest	125090	-21	kworker/u16:2+events_unbound	10:04:16	5
3987301	99	35	33,2	cyclictest	428846	-21	kworker/u16:0+events_unbound	12:21:08	5
3987301	99	35	33,2	cyclictest	368311	-21	kworker/u16:2+events_unbound	11:52:07	5
3987301	99	35	33,2	cyclictest	368311	-21	kworker/u16:2+events_unbound	11:52:07	5
3987301	99	35	33,2	cyclictest	282465	-21	kworker/u16:3+events_unbound	12:33:48	5
3987301	99	35	33,2	cyclictest	282465	-21	kworker/u16:3+events_unbound	12:33:48	5
3987301	99	35	33,2	cyclictest	282465	-21	kworker/u16:3+events_unbound	11:48:28	5
3987301	99	35	33,2	cyclictest	282465	-21	kworker/u16:3+events_unbound	11:37:16	5
3987301	99	35	33,2	cyclictest	233584	-21	kworker/u16:1+events_unbound	10:56:56	5
3984427	2	35	23,7	sleep5	0	-21	swapper/5	07:04:47	5
3987301	99	34	32,2	cyclictest	342895	-21	kworker/u16:1+events_unbound	11:20:43	5
3987301	99	34	32,2	cyclictest	295651	-21	kworker/u16:2+events_unbound	11:18:44	5
3987301	99	34	32,2	cyclictest	282465	-21	kworker/u16:3+events_unbound	12:17:29	5
3987301	99	34	32,2	cyclictest	17831	-21	kworker/u16:0+events_unbound	09:46:51	5
3987301	99	34	32,2	cyclictest	17831	-21	kworker/u16:0+events_unbound	09:46:51	5
3987301	99	34	32,2	cyclictest	171916	-21	kworker/u16:0+events_unbound	10:33:04	5
3987306	99	33	28,4	cyclictest	150165	-21	latency_hist	09:59:21	7
3987301	99	33	31,2	cyclictest	368311	-21	kworker/u16:2+events_unbound	12:14:08	5
3987301	99	33	31,2	cyclictest	282465	-21	kworker/u16:3+flush-8:0	11:04:52	5
3987301	99	33	31,2	cyclictest	27823	-21	kworker/u16:4+events_unbound	09:33:16	5
3987301	99	32	30,2	cyclictest	27823	-21	kworker/u16:4+events_unbound	09:57:12	5
3987301	99	32	30,2	cyclictest	233584	-21	kworker/u16:1+events_unbound	10:47:57	5
3987301	99	32	30,2	cyclictest	138207	-21	kworker/u16:1+flush-8:0	10:14:56	5
3987301	99	31	29,2	cyclictest	4143793	-21	kworker/u16:1+events_unbound	09:28:36	5
3987301	99	31	29,2	cyclictest	17831	-21	kworker/u16:0+events_unbound	09:50:53	5
3987301	99	31	29,2	cyclictest	171916	-21	kworker/u16:0+events_unbound	10:51:08	5
3987301	99	31	29,2	cyclictest	150401	-21	kworker/u16:3+events_unbound	10:12:27	5
3987299	99	31	29,2	cyclictest	282465	-21	kworker/u16:3+flush-8:0	10:58:43	4
480830	2	30	0,1	chrt	480826	-21	latency_hist	12:14:21	7
3987301	99	30	28,2	cyclictest	4143793	-21	kworker/u16:1+events_unbound	09:23:37	5
3987301	99	30	28,2	cyclictest	282465	-21	kworker/u16:3+flush-8:0	11:10:27	5
3987301	99	30	28,2	cyclictest	27823	-21	kworker/u16:4+events_unbound	09:11:36	5
3987301	99	30	28,2	cyclictest	17831	-21	kworker/u16:0+events_unbound	09:40:28	5
3987301	99	30	28,2	cyclictest	171916	-21	kworker/u16:0+events_unbound	10:25:36	5
3987299	99	30	28,2	cyclictest	515250	-21	kworker/u16:1+flush-8:0	12:29:21	4
430649	2	29	0,1	sleep4	0	-21	swapper/4	11:52:14	4
430649	2	29	0,1	sleep4	0	-21	swapper/4	11:52:14	4
3987306	99	28	0,26	cyclictest	52174	-21	latency_hist	09:19:22	7
3987301	99	28	26,2	cyclictest	4039351	-21	kworker/u16:2+events_unbound	08:04:01	5
3987301	99	27	25,2	cyclictest	4143793	-21	kworker/u16:1+events_unbound	08:38:01	5
3987301	99	26	24,2	cyclictest	4039351	-21	kworker/u16:2+events_unbound	08:33:45	5
3987301	99	26	24,2	cyclictest	3987054	-21	kworker/u16:4+events_unbound	07:40:32	5
3987301	99	25	23,2	cyclictest	4039351	-21	kworker/u16:2+events_unbound	08:14:01	5
3987306	99	24	18,5	cyclictest	4058145	-21	latency_hist	07:44:22	7
3987305	99	24	22,2	cyclictest	4143793	-21	kworker/u16:1+events_unbound	09:24:36	6
3987306	99	23	18,4	cyclictest	635	-21	systemd-journal	11:49:20	7
3987305	99	23	21,2	cyclictest	4087296	-21	kworker/u16:0+flush-8:0	08:09:36	6
3987301	99	23	21,2	cyclictest	4000933	-21	kworker/u16:1+events_unbound	07:28:00	5
3987299	99	23	20,2	cyclictest	4077327	-21	kworker/u16:3+events_unbound	08:14:36	4
3986717	2	23	13,7	sleep6	0	-21	swapper/6	07:05:21	6
3987306	99	22	17,4	cyclictest	297230	-21	latency_hist	10:59:22	7
3987299	99	22	18,3	cyclictest	4039351	-21	kworker/u16:2+flush-8:0	07:39:40	4
3987301	99	21	19,2	cyclictest	4077327	-21	kworker/u16:3+events_unbound	08:25:31	5
3987301	99	21	19,2	cyclictest	4039351	-21	kworker/u16:2+events_unbound	07:49:00	5
3987301	99	21	19,2	cyclictest	3968334	-21	kworker/u16:0+flush-8:0	07:19:32	5
3987299	99	21	19,2	cyclictest	4029557	-21	kworker/u16:0+events_unbound	07:34:21	4
3987306	99	20	14,5	cyclictest	4077321	-21	latency_hist	07:54:22	7
3987301	99	20	16,3	cyclictest	4001453	-21	diskstats	07:14:35	5
3987301	99	19	17,2	cyclictest	4077327	-21	kworker/u16:3+events_unbound	08:19:39	5
3987301	99	19	17,2	cyclictest	4077327	-21	kworker/u16:3+events_unbound	08:19:39	5
3987301	99	19	17,2	cyclictest	4039351	-21	kworker/u16:2+events_unbound	08:15:31	5
3987301	99	19	16,2	cyclictest	4077327	-21	kworker/u16:3+events_unbound	07:54:32	5
3987299	99	19	16,2	cyclictest	4143793	-21	kworker/u16:1+events_unbound	09:09:29	4
3987299	99	19	16,2	cyclictest	4143793	-21	kworker/u16:1+events_unbound	08:54:36	4
3987305	99	18	15,3	cyclictest	17831	-21	kworker/u16:0+flush-8:0	09:40:25	6
3987301	99	18	16,2	cyclictest	4039351	-21	kworker/u16:2+events_unbound	07:49:47	5
3987301	99	18	16,2	cyclictest	17831	-21	kworker/u16:0+events_unbound	09:06:31	5
3987299	99	18	16,2	cyclictest	4039351	-21	kworker/u16:2+flush-8:0	08:29:37	4
3987299	99	18	16,2	cyclictest	282465	-21	kworker/u16:3+events_unbound	12:14:16	4
3987299	99	18	15,2	cyclictest	4077327	-21	kworker/u16:3+events_unbound	08:24:36	4
3987306	99	17	0,15	cyclictest	1234	-21	snmpd	08:36:52	7
3987301	99	17	14,2	cyclictest	3987054	-21	kworker/u16:4+events_unbound	07:34:23	5
3987301	99	17	14,2	cyclictest	3987054	-21	kworker/u16:4+events_unbound	07:34:23	5
3987299	99	17	15,2	cyclictest	4039351	-21	kworker/u16:2+events_unbound	07:54:36	4
3987299	99	17	15,2	cyclictest	233584	-21	kworker/u16:1+flush-8:0	10:29:59	4
3987306	99	16	0,14	cyclictest	0	-21	swapper/7	08:39:45	7
3987301	99	16	14,2	cyclictest	8211	-21	kworker/u16:2+flush-8:0	08:59:42	5
3987299	99	16	14,2	cyclictest	199343	-21	kworker/u16:4+flush-8:0	10:34:39	4
3987299	99	16	13,2	cyclictest	282465	-21	kworker/u16:3+flush-8:0	11:09:27	4
3987306	99	15	10,4	cyclictest	407387	-21	basename	11:44:20	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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