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 Sat Aug 29, 2026 12:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
553195	2	102	0,1	sleep7	553198	-21	sh	10:10:06	7
161240	2	52	41,8	sleep4	0	-21	swapper/4	07:05:51	4
916943	2	50	0,0	sleep7	916944	-21	rm	12:36:40	7
161833	99	49	43,5	cyclictest	893957	-21	latency_hist	12:29:48	7
161828	99	44	42,2	cyclictest	189913	-21	kworker/u16:0+flush-8:0	07:59:49	6
161500	2	42	8,29	sleep7	0	-21	swapper/7	07:09:31	7
161833	99	39	34,4	cyclictest	708638	-21	latency_hist	11:14:48	7
161833	99	39	34,4	cyclictest	272627	-21	latency_hist	08:04:49	7
161828	99	38	36,2	cyclictest	379752	-21	kworker/u16:1+events_unbound	09:24:48	6
161499	2	38	27,8	sleep6	0	-21	swapper/6	07:09:30	6
152187	2	37	27,7	sleep5	0	-21	swapper/5	07:04:55	5
161828	99	33	31,2	cyclictest	709025	-21	kworker/u16:2+events_unbound	12:11:59	6
596263	2	32	0,1	chrt	596264	-21	ssh	10:28:01	7
161828	99	31	29,2	cyclictest	161526	-21	kworker/u16:2+flush-8:0	07:19:49	6
161828	99	30	28,2	cyclictest	709025	-21	kworker/u16:2+events_unbound	11:17:00	6
161828	99	30	28,2	cyclictest	549427	-21	kworker/u16:0+events_unbound	10:13:00	6
161828	99	30	28,2	cyclictest	253173	-21	kworker/u16:3+events_unbound	09:04:44	6
161828	99	30	27,2	cyclictest	549427	-21	kworker/u16:0+events_unbound	10:29:51	6
161824	99	30	28,2	cyclictest	271701	-21	kworker/u16:2+events_unbound	08:10:03	4
161828	99	29	27,2	cyclictest	379752	-21	kworker/u16:1+flush-8:0	10:29:49	6
161828	99	29	27,2	cyclictest	189913	-21	kworker/u16:0+flush-8:0	07:54:48	6
161828	99	28	26,2	cyclictest	709025	-21	kworker/u16:2+events_unbound	12:09:21	6
161828	99	28	26,2	cyclictest	549427	-21	kworker/u16:0+events_unbound	11:03:47	6
161828	99	28	26,2	cyclictest	484417	-21	kworker/u16:2+events_unbound	10:04:48	6
161828	99	28	26,2	cyclictest	484417	-21	kworker/u16:2+events_unbound	10:04:48	6
161828	99	28	26,2	cyclictest	301940	-21	kworker/u16:4+events_unbound	08:50:12	6
161828	99	28	26,2	cyclictest	253173	-21	kworker/u16:3+events_unbound	09:35:23	6
161828	99	28	25,2	cyclictest	379752	-21	kworker/u16:1+events_unbound	09:29:51	6
161833	99	27	26,0	cyclictest	0	-21	swapper/7	08:41:19	7
161828	99	27	25,2	cyclictest	770517	-21	kworker/u16:4+events_unbound	12:04:24	6
161828	99	27	25,2	cyclictest	770517	-21	kworker/u16:4+events_unbound	12:04:24	6
161828	99	27	25,2	cyclictest	758221	-21	kworker/u16:1+flush-8:0	11:35:29	6
161833	99	26	25,0	cyclictest	0	-21	swapper/7	07:17:25	7
161828	99	26	24,2	cyclictest	906338	-21	kworker/u16:3+events_unbound	12:35:24	6
161828	99	26	24,2	cyclictest	709025	-21	kworker/u16:2+events_unbound	11:20:06	6
161828	99	26	24,2	cyclictest	709025	-21	kworker/u16:2+events_unbound	11:20:06	6
161828	99	26	24,2	cyclictest	379752	-21	kworker/u16:1+events_unbound	10:48:56	6
161828	99	25	23,2	cyclictest	709025	-21	kworker/u16:2+flush-8:0	12:15:52	6
161828	99	25	23,2	cyclictest	694640	-21	kworker/u16:3+events_unbound	11:47:55	6
161828	99	25	23,2	cyclictest	560169	-21	kworker/u16:4+events_unbound	10:36:55	6
161824	99	25	24,1	cyclictest	854487	-21	kworker/u16:0+events_unbound	12:35:52	4
161824	99	25	22,2	cyclictest	142477	-21	kworker/u16:1+events_unbound	07:14:52	4
161833	99	24	23,0	cyclictest	0	-21	swapper/7	08:16:36	7
161828	99	24	22,2	cyclictest	770517	-21	kworker/u16:4+events_unbound	11:58:07	6
161828	99	24	22,2	cyclictest	560169	-21	kworker/u16:4+events_unbound	10:56:51	6
161828	99	24	22,2	cyclictest	549427	-21	kworker/u16:0+events_unbound	10:20:59	6
161828	99	24	22,2	cyclictest	253173	-21	kworker/u16:3+flush-8:0	09:50:15	6
161833	99	23	22,0	cyclictest	0	-21	swapper/7	09:02:51	7
161833	99	23	22,0	cyclictest	0	-21	swapper/7	08:47:11	7
161833	99	23	22,0	cyclictest	0	-21	swapper/7	08:34:32	7
161828	99	23	21,2	cyclictest	498546	-21	kworker/u16:5+events_unbound	09:58:52	6
161828	99	23	21,2	cyclictest	350732	-21	kworker/u16:0+flush-8:0	09:29:44	6
161824	99	23	21,2	cyclictest	560169	-21	kworker/u16:4+flush-8:0	10:34:44	4
161833	99	22	21,0	cyclictest	0	-21	swapper/7	10:59:59	7
161828	99	22	20,2	cyclictest	484417	-21	kworker/u16:2+events_unbound	10:08:19	6
161828	99	22	20,2	cyclictest	350732	-21	kworker/u16:0+events_unbound	09:42:00	6
161824	99	22	21,1	cyclictest	709025	-21	kworker/u16:2+events_unbound	11:52:27	4
161824	99	22	20,2	cyclictest	189913	-21	kworker/u16:0+events_unbound	07:35:04	4
161828	99	21	19,2	cyclictest	854487	-21	kworker/u16:0+flush-8:0	12:34:43	6
161828	99	21	19,2	cyclictest	709025	-21	kworker/u16:2+flush-8:0	12:20:14	6
161828	99	21	19,2	cyclictest	549427	-21	kworker/u16:0+events_unbound	11:26:47	6
161828	99	21	18,2	cyclictest	142477	-21	kworker/u16:1+events_unbound	07:10:01	6
161824	99	21	20,1	cyclictest	709025	-21	kworker/u16:2+events_unbound	12:23:47	4
161824	99	21	19,2	cyclictest	350732	-21	kworker/u16:0+flush-8:0	09:40:19	4
161833	99	20	19,0	cyclictest	0	-21	swapper/7	12:10:45	7
161828	99	20	18,2	cyclictest	549427	-21	kworker/u16:0+events_unbound	11:32:58	6
161828	99	20	17,2	cyclictest	271701	-21	kworker/u16:2+flush-8:0	08:30:09	6
161833	99	19	18,0	cyclictest	0	-21	swapper/7	09:45:23	7
161833	99	19	15,3	cyclictest	1277	-21	snmpd	08:57:09	7
161833	99	19	0,17	cyclictest	694667	-21	ssh	11:07:09	7
161828	99	19	17,2	cyclictest	709025	-21	kworker/u16:2+events_unbound	11:53:43	6
161828	99	19	17,2	cyclictest	271701	-21	kworker/u16:2+events_unbound	08:20:03	6
161824	99	19	17,2	cyclictest	818134	-21	kworker/u16:1+flush-8:0	12:09:47	4
161833	99	18	17,0	cyclictest	0	-21	swapper/7	10:15:46	7
161833	99	18	17,0	cyclictest	0	-21	swapper/7	07:27:58	7
161833	99	18	17,0	cyclictest	0	-21	swapper/7	07:13:46	7
161833	99	18	16,1	cyclictest	878699	-21	ssh	12:20:16	7
161833	99	18	16,1	cyclictest	0	-21	swapper/7	07:40:08	7
161828	99	18	16,2	cyclictest	560169	-21	kworker/u16:4+events_unbound	10:52:11	6
161828	99	18	16,2	cyclictest	484417	-21	kworker/u16:2+events_unbound	10:14:52	6
161828	99	18	16,2	cyclictest	379752	-21	kworker/u16:1+events_unbound	09:18:23	6
161828	99	18	16,2	cyclictest	379752	-21	kworker/u16:1+events_unbound	09:18:23	6
161828	99	18	16,2	cyclictest	379752	-21	kworker/u16:1+events_unbound	09:14:24	6
161828	99	18	16,2	cyclictest	271701	-21	kworker/u16:2+events_unbound	08:29:00	6
161828	99	18	16,2	cyclictest	253173	-21	kworker/u16:3+events_unbound	08:09:00	6
161827	99	18	16,2	cyclictest	549427	-21	kworker/u16:0+flush-8:0	11:30:03	5
161824	99	18	16,2	cyclictest	253173	-21	kworker/u16:3+flush-8:0	08:40:04	4
161833	99	17	16,0	cyclictest	0	-21	swapper/7	10:20:04	7
161833	99	17	16,0	cyclictest	0	-21	swapper/7	08:39:31	7
161833	99	17	16,0	cyclictest	0	-21	swapper/7	08:39:31	7
161833	99	17	16,0	cyclictest	0	-21	swapper/7	07:51:23	7
161833	99	17	13,3	cyclictest	448982	-21	ssh	09:29:49	7
161833	99	17	0,16	cyclictest	0	-21	swapper/7	09:10:12	7
161828	99	17	16,1	cyclictest	770517	-21	kworker/u16:4+events_unbound	11:43:35	6
161828	99	17	15,2	cyclictest	560169	-21	kworker/u16:4+events_unbound	10:41:24	6
161828	99	17	15,2	cyclictest	253173	-21	kworker/u16:3+events_unbound	09:45:27	6
161824	99	17	14,2	cyclictest	498546	-21	kworker/u16:5+flush-8:0	10:04:54	4
161833	99	16	15,0	cyclictest	0	-21	swapper/7	08:49:49	7
161833	99	16	15,0	cyclictest	0	-21	swapper/7	08:12:43	7
161833	99	16	15,0	cyclictest	0	-21	swapper/7	07:44:56	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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