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 Wed Feb 11, 2026 00:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3905689	2	59	48,8	sleep4	0	-21	swapper/4	19:04:56	4
3905681	2	58	48,7	sleep5	0	-21	swapper/5	19:04:49	5
3905523	2	47	11,31	sleep7	0	-21	swapper/7	19:02:34	7
3906054	99	40	37,2	cyclictest	79299	-21	kworker/u16:5+events_unbound	22:11:11	5
3906063	99	39	38,0	cyclictest	0	-21	swapper/7	00:06:29	7
3905567	2	39	29,7	sleep6	0	-21	swapper/6	19:03:13	6
3906054	99	38	35,2	cyclictest	3996995	-21	kworker/u16:0+flush-8:0	21:50:56	5
3906063	99	37	32,4	cyclictest	93152	-21	latency_hist	22:05:56	7
3906054	99	37	35,2	cyclictest	54732	-21	kworker/u16:1+events_unbound	22:01:11	5
3906054	99	36	33,2	cyclictest	321848	-21	kworker/u16:1+events_unbound	23:46:10	5
3906049	99	35	32,2	cyclictest	3996995	-21	kworker/u16:0+flush-8:0	21:51:31	4
3906063	99	33	29,3	cyclictest	124	-21	kswapd0	22:50:56	7
3906054	99	33	31,2	cyclictest	201927	-21	kworker/u16:3+flush-8:0	23:57:26	5
3906054	99	32	29,2	cyclictest	261019	-21	kworker/u16:0+events_unbound	23:26:10	5
3906049	99	32	29,2	cyclictest	417552	-21	kworker/u16:2+flush-8:0	00:31:11	4
3906054	99	31	28,2	cyclictest	3996995	-21	kworker/u16:0+flush-8:0	22:16:12	5
3906063	99	29	28,0	cyclictest	0	-21	swapper/7	21:56:42	7
3906049	99	29	27,2	cyclictest	247359	-21	kworker/u16:2+events_unbound	23:11:20	4
3906058	99	28	25,2	cyclictest	261019	-21	kworker/u16:0+flush-8:0	23:35:56	6
3906049	99	28	26,2	cyclictest	429775	-21	kworker/u16:3+events_unbound	00:26:06	4
3906063	99	27	26,0	cyclictest	0	-21	swapper/7	21:41:06	7
3906049	99	27	24,3	cyclictest	3996995	-21	kworker/u16:0+events_unbound	22:26:24	4
3906049	99	27	24,2	cyclictest	4190389	-21	kworker/u16:3+events_unbound	21:26:10	4
3906063	99	26	26,0	cyclictest	0	-21	swapper/7	22:15:46	7
3906063	99	26	26,0	cyclictest	0	-21	swapper/7	21:25:21	7
3906063	99	26	25,0	cyclictest	0	-21	swapper/7	19:11:01	7
3906063	99	26	25,0	cyclictest	0	-21	swapper/7	00:16:41	7
3906063	99	26	24,1	cyclictest	97766	-21	ssh	22:06:14	7
3906049	99	26	23,2	cyclictest	3877208	-21	kworker/u16:1+events_unbound	19:11:00	4
224247	2	26	0,0	chrt	224246	-21	ssh	22:58:24	7
3906063	99	25	25,0	cyclictest	0	-21	swapper/7	21:36:53	7
3906049	99	25	22,3	cyclictest	104821	-21	kworker/u16:2+flush-8:0	22:31:21	4
3906063	99	24	23,0	cyclictest	0	-21	swapper/7	19:09:59	7
3906063	99	24	19,4	cyclictest	4166244	-21	latency_hist	21:15:56	7
3906049	99	24	22,2	cyclictest	54732	-21	kworker/u16:1+events_unbound	22:51:19	4
3906049	99	24	22,2	cyclictest	273308	-21	kworker/u16:2+events_unbound	23:26:08	4
3906049	99	24	21,2	cyclictest	3996995	-21	kworker/u16:0+flush-8:0	21:21:12	4
3906063	99	23	23,0	cyclictest	0	-21	swapper/7	00:21:44	7
3906063	99	23	22,0	cyclictest	0	-21	swapper/7	20:38:23	7
3906063	99	23	22,0	cyclictest	0	-21	swapper/7	19:44:52	7
3906063	99	23	22,0	cyclictest	0	-21	swapper/7	19:27:36	7
3906063	99	23	22,0	cyclictest	0	-21	swapper/7	19:17:35	7
3906063	99	22	21,0	cyclictest	0	-21	swapper/7	20:33:55	7
3906063	99	22	21,0	cyclictest	0	-21	swapper/7	20:12:47	7
3906063	99	22	20,1	cyclictest	453589	-21	ssh	00:35:21	7
3906063	99	21	20,0	cyclictest	0	-21	swapper/7	20:56:51	7
3906063	99	21	20,0	cyclictest	0	-21	swapper/7	20:22:16	7
3906063	99	21	20,0	cyclictest	0	-21	swapper/7	19:23:03	7
3906049	99	21	19,2	cyclictest	261019	-21	kworker/u16:0+flush-8:0	23:16:22	4
3906049	99	21	18,3	cyclictest	54732	-21	kworker/u16:1+events_unbound	23:06:18	4
3906063	99	20	20,0	cyclictest	0	-21	swapper/7	22:38:11	7
3906063	99	20	19,0	cyclictest	0	-21	swapper/7	20:41:30	7
3906063	99	20	19,0	cyclictest	0	-21	swapper/7	20:28:47	7
3906063	99	20	19,0	cyclictest	0	-21	swapper/7	20:08:02	7
3906063	99	20	19,0	cyclictest	0	-21	swapper/7	20:03:03	7
3906063	99	20	12,7	cyclictest	0	-21	swapper/7	23:15:56	7
3906063	99	19	18,0	cyclictest	0	-21	swapper/7	19:36:10	7
3906063	99	19	18,0	cyclictest	0	-21	swapper/7	00:26:37	7
3906054	99	19	17,2	cyclictest	9380	-21	kworker/u16:2+events_unbound	21:41:19	5
3906049	99	19	17,2	cyclictest	3996995	-21	kworker/u16:0+events_unbound	21:31:19	4
3906063	99	18	18,0	cyclictest	0	-21	swapper/7	00:11:40	7
3906063	99	18	17,0	cyclictest	0	-21	swapper/7	20:53:26	7
3906063	99	18	14,3	cyclictest	4151106	-21	ssh	21:06:18	7
3906063	99	18	13,4	cyclictest	333736	-21	latency_hist	23:45:55	7
3906063	99	18	13,4	cyclictest	20946	-21	latency_hist	21:35:56	7
3906049	99	18	17,1	cyclictest	201927	-21	kworker/u16:3+events_unbound	23:32:39	4
3906049	99	18	16,2	cyclictest	357885	-21	kworker/u16:0+flush-8:0	00:11:11	4
3906049	99	18	16,2	cyclictest	201927	-21	kworker/u16:3+flush-8:0	23:46:22	4
3906063	99	17	9,7	cyclictest	0	-21	swapper/7	23:05:55	7
3906063	99	17	7,8	cyclictest	0	-21	swapper/7	22:41:20	7
3906063	99	17	16,0	cyclictest	0	-21	swapper/7	23:11:01	7
3906063	99	17	16,0	cyclictest	0	-21	swapper/7	20:50:50	7
3906063	99	17	16,0	cyclictest	0	-21	swapper/7	19:49:40	7
3906063	99	17	12,4	cyclictest	153354	-21	latency_hist	22:30:56	7
3906058	99	17	12,4	cyclictest	46264	-21	hddtemp_smartct	21:46:09	6
3906058	99	17	0,14	cyclictest	0	-21	swapper/6	23:11:17	6
3906049	99	17	14,2	cyclictest	3996995	-21	kworker/u16:0+events_unbound	21:06:24	4
3906063	99	16	8,7	cyclictest	0	-21	swapper/7	23:51:14	7
3906063	99	16	14,1	cyclictest	295485	-21	ssh	23:26:33	7
3906063	99	16	14,1	cyclictest	129324	-21	sed	22:20:55	7
3906063	99	16	10,5	cyclictest	650	-21	systemd-journal	23:25:56	7
3906058	99	16	0,1	cyclictest	0	-21	swapper/6	21:31:20	6
3906054	99	16	14,2	cyclictest	3996995	-21	kworker/u16:0+flush-8:0	21:26:12	5
3906054	99	16	12,3	cyclictest	3996995	-21	kworker/u16:0+flush-8:0	20:01:22	5
3906049	99	16	14,2	cyclictest	3996995	-21	kworker/u16:0+events_unbound	20:01:21	4
3906049	99	16	13,2	cyclictest	3842355	-21	kworker/u16:3+events_unbound	19:51:11	4
3906049	99	16	12,3	cyclictest	3996995	-21	kworker/u16:0+events_unbound	22:11:19	4
3906063	99	15	7,7	cyclictest	0	-21	swapper/7	21:26:23	7
3906063	99	15	6,8	cyclictest	0	-21	swapper/7	23:36:19	7
3906063	99	15	14,0	cyclictest	0	-21	swapper/7	20:20:30	7
3906063	99	15	14,0	cyclictest	0	-21	swapper/7	19:56:38	7
3906063	99	15	10,4	cyclictest	381884	-21	latency_hist	00:05:56	7
3906054	99	15	14,1	cyclictest	0	-21	swapper/5	00:01:41	5
3906063	99	14	7,6	cyclictest	1267	-21	snmpd	21:48:48	7
3906063	99	14	6,7	cyclictest	0	-21	swapper/7	23:56:12	7
3906063	99	14	6,7	cyclictest	0	-21	swapper/7	22:21:10	7
3906063	99	14	5,8	cyclictest	0	-21	swapper/7	22:51:17	7
3906063	99	14	5,7	cyclictest	0	-21	swapper/7	22:31:15	7
3906063	99	14	11,2	cyclictest	0	-21	swapper/7	21:51:26	7
3906063	99	14	0,1	cyclictest	0	-21	swapper/7	23:31:23	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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