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 Mon Mar 16, 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
224692	2	99	0,0	sleep6	86	-21	ksoftirqd/6	12:14:14	6
4651	2	97	0,1	sleep5	0	-21	swapper/5	10:44:05	5
3719384	99	63	61,2	cyclictest	3988908	-21	kworker/u16:1+events_unbound	10:28:56	6
3719376	99	63	61,2	cyclictest	4132661	-21	kworker/u16:4+events_unbound	10:24:14	4
3719376	99	55	53,2	cyclictest	36576	-21	kworker/u16:0+events_unbound	11:04:10	4
3719376	99	54	51,2	cyclictest	4119357	-21	kworker/u16:2+events_unbound	10:34:10	4
3719048	2	53	42,7	sleep6	0	-21	swapper/6	07:03:06	6
3719376	99	52	50,2	cyclictest	4119357	-21	kworker/u16:2+events_unbound	11:34:14	4
3719376	99	52	50,2	cyclictest	4119357	-21	kworker/u16:2+events_unbound	11:34:14	4
3719376	99	50	48,2	cyclictest	3988908	-21	kworker/u16:1+events_unbound	10:13:55	4
3719376	99	50	48,2	cyclictest	163899	-21	kworker/u16:3+events_unbound	12:29:15	4
3719376	99	49	47,2	cyclictest	4119357	-21	kworker/u16:2+events_unbound	10:19:15	4
3719376	99	49	47,2	cyclictest	4119357	-21	kworker/u16:2+events_unbound	10:19:15	4
3719376	99	49	47,2	cyclictest	105724	-21	kworker/u16:5+events_unbound	12:12:23	4
3719376	99	49	47,2	cyclictest	105724	-21	kworker/u16:5+events_unbound	12:12:23	4
3719076	2	49	39,7	sleep5	0	-21	swapper/5	07:03:29	5
3719376	99	47	45,2	cyclictest	3988908	-21	kworker/u16:1+events_unbound	10:12:23	4
3719376	99	47	45,2	cyclictest	36576	-21	kworker/u16:0+events_unbound	11:33:27	4
3719376	99	46	44,2	cyclictest	4119357	-21	kworker/u16:2+events_unbound	11:09:11	4
3719376	99	46	44,2	cyclictest	248393	-21	kworker/u16:0+events_unbound	12:24:14	4
3719376	99	45	43,2	cyclictest	3988908	-21	kworker/u16:1+events_unbound	10:59:15	4
3719376	99	45	43,2	cyclictest	131306	-21	kworker/u16:1+events_unbound	12:04:10	4
3719384	99	44	42,2	cyclictest	131306	-21	kworker/u16:1+events_unbound	12:24:00	6
3719384	99	44	42,2	cyclictest	105724	-21	kworker/u16:5+flush-8:0	11:54:11	6
3719376	99	44	42,2	cyclictest	105724	-21	kworker/u16:5+events_unbound	11:45:19	4
3719376	99	44	41,3	cyclictest	131306	-21	kworker/u16:1+flush-8:0	11:54:03	4
3719376	99	43	41,2	cyclictest	4119357	-21	kworker/u16:2+events_unbound	11:43:23	4
3719376	99	43	41,2	cyclictest	4119357	-21	kworker/u16:2+events_unbound	11:23:31	4
3719376	99	43	41,2	cyclictest	3988908	-21	kworker/u16:1+events_unbound	11:18:40	4
3719376	99	43	41,2	cyclictest	3988908	-21	kworker/u16:1+events_unbound	10:54:57	4
3719376	99	43	41,2	cyclictest	3988908	-21	kworker/u16:1+events_unbound	10:54:57	4
3719376	99	43	41,2	cyclictest	3838207	-21	kworker/u16:2+events_unbound	09:07:16	4
3719376	99	43	40,2	cyclictest	3761468	-21	kworker/u16:0+events_unbound	08:23:45	4
3719376	99	42	40,2	cyclictest	3838207	-21	kworker/u16:2+events_unbound	09:31:11	4
3718797	2	42	7,30	sleep7	0	-21	swapper/7	06:59:30	7
3719376	99	41	39,2	cyclictest	4132661	-21	kworker/u16:4+events_unbound	10:51:12	4
3719376	99	41	39,2	cyclictest	4132661	-21	kworker/u16:4+events_unbound	10:41:24	4
3719376	99	41	39,2	cyclictest	4119357	-21	kworker/u16:2+events_unbound	10:44:10	4
3719376	99	41	39,2	cyclictest	4036597	-21	kworker/u16:3+events_unbound	09:52:39	4
3719376	99	41	39,2	cyclictest	3988908	-21	kworker/u16:1+events_unbound	09:57:32	4
3719376	99	41	39,2	cyclictest	105724	-21	kworker/u16:5+events_unbound	12:00:35	4
3719389	99	40	35,4	cyclictest	650	-21	systemd-journal	10:23:37	7
3719389	99	40	35,4	cyclictest	650	-21	systemd-journal	10:23:37	7
3719384	99	40	38,2	cyclictest	4132661	-21	kworker/u16:4+events_unbound	10:53:37	6
3719384	99	40	38,2	cyclictest	105724	-21	kworker/u16:5+events_unbound	11:39:15	6
3719376	99	40	38,2	cyclictest	4036597	-21	kworker/u16:3+flush-8:0	09:58:47	4
3719376	99	40	38,2	cyclictest	3894934	-21	kworker/u16:3+events_unbound	09:22:21	4
3719376	99	40	38,2	cyclictest	105724	-21	kworker/u16:5+events_unbound	11:50:12	4
3719376	99	40	37,2	cyclictest	163899	-21	kworker/u16:3+events_unbound	12:22:48	4
3719389	99	39	0,37	cyclictest	124	-21	kswapd0	12:28:42	7
3719384	99	39	37,2	cyclictest	4132661	-21	kworker/u16:4+flush-8:0	10:33:57	6
3719376	99	39	37,2	cyclictest	4036597	-21	kworker/u16:3+events_unbound	09:43:33	4
3719376	99	39	37,2	cyclictest	3988908	-21	kworker/u16:1+events_unbound	10:06:04	4
3719376	99	39	37,2	cyclictest	3988908	-21	kworker/u16:1+events_unbound	09:37:12	4
3719376	99	39	37,2	cyclictest	3894934	-21	kworker/u16:3+events_unbound	09:27:57	4
3719376	99	39	37,2	cyclictest	3838207	-21	kworker/u16:2+events_unbound	09:12:00	4
3719376	99	39	37,2	cyclictest	131306	-21	kworker/u16:1+events_unbound	12:16:39	4
3719384	99	38	36,2	cyclictest	105724	-21	kworker/u16:5+events_unbound	11:49:15	6
3719376	99	38	36,2	cyclictest	3695045	-21	kworker/u16:2+events_unbound	07:44:13	4
3719389	99	37	36,0	cyclictest	0	-21	swapper/7	09:53:55	7
3719389	99	37	32,4	cyclictest	650	-21	systemd-journal	12:03:37	7
3719384	99	37	35,2	cyclictest	4119357	-21	kworker/u16:2+events_unbound	11:28:56	6
3719384	99	37	35,2	cyclictest	4119357	-21	kworker/u16:2+events_unbound	11:23:57	6
3719384	99	37	35,2	cyclictest	3988908	-21	kworker/u16:1+flush-8:0	10:09:04	6
3719384	99	37	34,2	cyclictest	4132661	-21	kworker/u16:4+events_unbound	10:23:59	6
3719376	99	37	36,1	cyclictest	3924134	-21	kworker/u16:0+events_unbound	09:16:16	4
3719376	99	37	35,2	cyclictest	3838207	-21	kworker/u16:2+events_unbound	08:51:09	4
3719376	99	37	35,2	cyclictest	105724	-21	kworker/u16:5+events_unbound	11:27:37	4
3719389	99	36	30,5	cyclictest	3866452	-21	latency_hist	08:18:42	7
3719384	99	36	34,2	cyclictest	4132661	-21	kworker/u16:4+events_unbound	10:42:19	6
3719384	99	36	34,2	cyclictest	3988908	-21	kworker/u16:1+events_unbound	09:34:52	6
3709951	2	36	26,7	sleep4	0	-21	swapper/4	06:58:47	4
3719384	99	35	33,2	cyclictest	131306	-21	kworker/u16:1+events_unbound	12:19:11	6
3719376	99	35	33,2	cyclictest	4119357	-21	kworker/u16:2+events_unbound	10:30:18	4
3719376	99	35	33,2	cyclictest	4036597	-21	kworker/u16:3+events_unbound	09:46:00	4
3719389	99	34	0,33	cyclictest	4192741	-21	date	10:43:42	7
3719384	99	34	32,2	cyclictest	3924134	-21	kworker/u16:0+events_unbound	09:24:15	6
3719384	99	34	32,2	cyclictest	36576	-21	kworker/u16:0+events_unbound	11:05:19	6
3719376	99	34	32,2	cyclictest	3838207	-21	kworker/u16:2+events_unbound	08:44:11	4
3719384	99	33	31,2	cyclictest	248393	-21	kworker/u16:0+flush-8:0	12:29:19	6
3719376	99	33	31,2	cyclictest	2736957	-21	kworker/u16:4+flush-8:0	07:53:38	4
3719376	99	33	31,2	cyclictest	2736957	-21	kworker/u16:4+events_unbound	07:16:20	4
3719384	99	32	30,2	cyclictest	3988908	-21	kworker/u16:1+events_unbound	11:14:08	6
3719384	99	32	30,2	cyclictest	131306	-21	kworker/u16:1+events_unbound	12:04:51	6
3719384	99	31	28,2	cyclictest	4119357	-21	kworker/u16:2+events_unbound	10:18:56	6
3719384	99	31	28,2	cyclictest	4119357	-21	kworker/u16:2+events_unbound	10:18:56	6
3719384	99	31	28,2	cyclictest	2736957	-21	kworker/u16:4+flush-8:0	07:44:08	6
3719389	99	30	0,29	cyclictest	650	-21	systemd-journal	09:08:37	7
3719384	99	30	28,2	cyclictest	4119357	-21	kworker/u16:2+flush-8:0	11:48:42	6
3719376	99	30	28,2	cyclictest	2736957	-21	kworker/u16:4+events_unbound	08:23:12	4
4155665	2	29	0,0	sleep7	4155666	-21	ssh	10:26:52	7
3719384	99	29	27,2	cyclictest	3894934	-21	kworker/u16:3+flush-8:0	09:18:47	6
3719384	99	29	27,2	cyclictest	3838207	-21	kworker/u16:2+events_unbound	09:31:28	6
3719384	99	29	27,2	cyclictest	36576	-21	kworker/u16:0+flush-8:0	11:34:28	6
3719384	99	29	27,2	cyclictest	36576	-21	kworker/u16:0+flush-8:0	11:34:28	6
3719376	99	29	27,2	cyclictest	3838207	-21	kworker/u16:2+events_unbound	08:07:05	4
3719389	99	28	26,1	cyclictest	0	-21	swapper/7	08:08:56	7
3719384	99	28	26,2	cyclictest	4132661	-21	kworker/u16:4+events_unbound	10:53:57	6
3719384	99	28	26,2	cyclictest	4132661	-21	kworker/u16:4+events_unbound	10:53:57	6
3719384	99	28	25,3	cyclictest	131306	-21	kworker/u16:1+flush-8:0	11:58:58	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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