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 May 15, 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
2515358	2	98	0,1	sleep7	2515361	-21	kthreadcore	11:23:21	7
1942778	2	72	43,8	sleep4	0	-21	swapper/4	07:06:20	4
1956340	2	64	0,1	sleep6	0	-21	swapper/6	07:13:02	6
1943208	99	53	50,2	cyclictest	1942948	-21	kworker/u16:3+flush-8:0	07:48:13	5
1943208	99	52	50,2	cyclictest	2300262	-21	kworker/u16:3+events_unbound	09:58:14	5
1943208	99	51	48,2	cyclictest	1994671	-21	kworker/u16:0+flush-8:0	07:58:13	5
1943208	99	50	48,2	cyclictest	2287809	-21	kworker/u16:2+events_unbound	10:18:29	5
1943208	99	49	47,2	cyclictest	2471701	-21	kworker/u16:2+events_unbound	11:13:20	5
1943208	99	49	47,2	cyclictest	2287809	-21	kworker/u16:2+events_unbound	10:08:31	5
1943208	99	49	46,2	cyclictest	2300262	-21	kworker/u16:3+events_unbound	10:42:59	5
1943208	99	48	46,2	cyclictest	2287809	-21	kworker/u16:2+flush-8:0	10:13:27	5
1943208	99	47	44,2	cyclictest	2050234	-21	kworker/u16:1+events_unbound	08:38:12	5
1943213	99	46	41,4	cyclictest	2496231	-21	latency_hist	11:17:58	7
1943208	99	46	44,2	cyclictest	2110695	-21	kworker/u16:2+events_unbound	09:18:30	5
1943208	99	46	43,2	cyclictest	2630309	-21	kworker/u16:0+events_unbound	12:18:13	5
1943208	99	46	43,2	cyclictest	2110695	-21	kworker/u16:2+events_unbound	09:33:27	5
1943208	99	46	43,2	cyclictest	1994671	-21	kworker/u16:0+flush-8:0	08:43:14	5
1941785	2	45	3,34	sleep7	0	-21	swapper/7	07:03:26	7
1943208	99	44	42,2	cyclictest	2484035	-21	kworker/u16:1+events_unbound	11:23:20	5
1943208	99	44	42,2	cyclictest	2110695	-21	kworker/u16:2+events_unbound	08:53:11	5
1943208	99	43	41,2	cyclictest	2583315	-21	kworker/u16:3+events_unbound	12:33:12	5
1943208	99	43	41,2	cyclictest	2110695	-21	kworker/u16:2+flush-8:0	08:48:25	5
1943208	99	43	41,2	cyclictest	2004718	-21	kworker/u16:4+events_unbound	08:03:13	5
1942797	2	43	33,7	sleep5	0	-21	swapper/5	07:06:37	5
1943208	99	42	40,2	cyclictest	2300262	-21	kworker/u16:3+events_unbound	10:57:58	5
1943208	99	42	40,2	cyclictest	2300262	-21	kworker/u16:3+events_unbound	10:29:20	5
1943213	99	41	40,0	cyclictest	0	-21	swapper/7	09:03:26	7
1943213	99	41	40,0	cyclictest	0	-21	swapper/7	09:03:26	7
1943208	99	41	39,2	cyclictest	2583315	-21	kworker/u16:3+events_unbound	12:09:04	5
1943208	99	41	39,2	cyclictest	2567146	-21	kworker/u16:0+events_unbound	11:48:29	5
1943208	99	41	39,2	cyclictest	2567146	-21	kworker/u16:0+events_unbound	11:48:29	5
1943208	99	41	39,2	cyclictest	2004718	-21	kworker/u16:4+flush-8:0	07:43:27	5
1943208	99	40	38,2	cyclictest	2300262	-21	kworker/u16:3+flush-8:0	10:23:28	5
1943208	99	40	38,2	cyclictest	1879246	-21	kworker/u16:1+events_unbound	07:28:24	5
1943208	99	39	37,2	cyclictest	2471701	-21	kworker/u16:2+events_unbound	11:59:12	5
1943203	99	39	36,2	cyclictest	2655614	-21	kworker/u16:2+flush-8:0	12:32:57	4
1943203	99	39	36,2	cyclictest	2655614	-21	kworker/u16:2+flush-8:0	12:32:57	4
1943213	99	38	32,5	cyclictest	2071945	-21	latency_hist	08:12:58	7
1943208	99	38	36,2	cyclictest	2484035	-21	kworker/u16:1+events_unbound	11:20:11	5
1943208	99	38	36,2	cyclictest	2386140	-21	kworker/u16:4+events_unbound	10:50:03	5
1943208	99	38	36,2	cyclictest	2129745	-21	kworker/u16:3+events_unbound	09:09:36	5
1943208	99	38	36,2	cyclictest	1942948	-21	kworker/u16:3+flush-8:0	07:23:14	5
2658530	2	37	0,1	chrt	0	-21	swapper/6	12:23:15	6
1943208	99	37	35,2	cyclictest	2445295	-21	kworker/u16:0+events_unbound	11:11:04	5
1943208	99	37	35,2	cyclictest	2386140	-21	kworker/u16:4+events_unbound	10:34:52	5
1943208	99	36	34,2	cyclictest	2567146	-21	kworker/u16:0+events_unbound	11:44:15	5
1943208	99	36	34,2	cyclictest	2272587	-21	kworker/u16:3+events_unbound	09:43:52	5
1943208	99	36	34,2	cyclictest	2110695	-21	kworker/u16:2+events_unbound	09:30:31	5
1943208	99	36	32,2	cyclictest	1868589	-21	kworker/u16:2+flush-8:0	07:13:27	5
2224158	2	35	0,1	sleep5	76	-21	ksoftirqd/5	09:23:30	5
1943213	99	35	29,5	cyclictest	2043097	-21	latency_hist	07:57:58	7
1943208	99	35	33,2	cyclictest	2471701	-21	kworker/u16:2+events_unbound	11:34:11	5
1943208	99	35	33,2	cyclictest	2287809	-21	kworker/u16:2+flush-8:0	09:53:39	5
1943208	99	34	32,2	cyclictest	2471701	-21	kworker/u16:2+flush-8:0	12:03:13	5
1943208	99	34	32,2	cyclictest	2386140	-21	kworker/u16:4+events_unbound	10:41:21	5
1943208	99	34	32,2	cyclictest	2256885	-21	kworker/u16:0+events_unbound	10:07:33	5
1943208	99	34	32,2	cyclictest	1994671	-21	kworker/u16:0+events_unbound	09:14:25	5
1943208	99	33	31,2	cyclictest	2583315	-21	kworker/u16:3+events_unbound	12:15:43	5
1943208	99	33	31,2	cyclictest	2529752	-21	kworker/u16:3+events_unbound	11:38:51	5
1943208	99	33	31,2	cyclictest	2471701	-21	kworker/u16:2+events_unbound	11:55:59	5
1943208	99	33	31,2	cyclictest	2110695	-21	kworker/u16:2+events_unbound	09:42:12	5
1943208	99	33	31,2	cyclictest	1994671	-21	kworker/u16:0+events_unbound	08:26:52	5
1943208	99	33	31,2	cyclictest	1994671	-21	kworker/u16:0+events_unbound	08:26:52	5
1943210	99	32	30,2	cyclictest	2004718	-21	kworker/u16:4+flush-8:0	07:48:24	6
1943208	99	32	30,2	cyclictest	2655614	-21	kworker/u16:2+events_unbound	12:29:47	5
1943208	99	32	30,2	cyclictest	2655614	-21	kworker/u16:2+events_unbound	12:29:47	5
1943208	99	32	30,2	cyclictest	2655614	-21	kworker/u16:2+events_unbound	12:24:36	5
1943208	99	32	30,2	cyclictest	2445295	-21	kworker/u16:0+events_unbound	11:01:31	5
1943213	99	31	30,0	cyclictest	0	-21	swapper/7	08:30:04	7
1943213	99	31	26,4	cyclictest	2606292	-21	latency_hist	12:02:58	7
1943208	99	31	30,1	cyclictest	1868589	-21	kworker/u16:2+events_unbound	07:38:18	5
1943208	99	31	30,1	cyclictest	1868589	-21	kworker/u16:2+events_unbound	07:38:18	5
1943208	99	31	29,2	cyclictest	2256885	-21	kworker/u16:0+events_unbound	09:48:26	5
1943208	99	31	29,2	cyclictest	2129745	-21	kworker/u16:3+flush-8:0	09:03:27	5
1943208	99	31	29,2	cyclictest	2129745	-21	kworker/u16:3+flush-8:0	09:03:27	5
1943208	99	31	29,2	cyclictest	1994671	-21	kworker/u16:0+flush-8:0	07:33:14	5
1943208	99	31	29,2	cyclictest	1994671	-21	kworker/u16:0+events_unbound	08:33:25	5
1943208	99	31	29,2	cyclictest	1994671	-21	kworker/u16:0+events_unbound	08:28:26	5
1943203	99	31	29,2	cyclictest	2272587	-21	kworker/u16:3+flush-8:0	09:47:58	4
1943213	99	30	29,0	cyclictest	0	-21	swapper/7	10:35:39	7
1943213	99	30	29,0	cyclictest	0	-21	swapper/7	08:22:28	7
1943213	99	30	25,4	cyclictest	2483999	-21	latency_hist	11:12:58	7
1943213	99	30	24,5	cyclictest	635	-21	systemd-journal	09:17:58	7
1943208	99	30	28,2	cyclictest	2445295	-21	kworker/u16:0+events_unbound	11:32:35	5
1943208	99	30	28,2	cyclictest	2424283	-21	kworker/u16:5+flush-8:0	11:03:39	5
1943208	99	30	28,2	cyclictest	2424283	-21	kworker/u16:5+flush-8:0	11:03:39	5
1943208	99	30	28,2	cyclictest	1994671	-21	kworker/u16:0+events_unbound	08:19:52	5
2551827	2	29	0,1	chrt	2551828	-21	kthreadcore	11:38:20	7
1943213	99	29	28,0	cyclictest	0	-21	swapper/7	12:31:42	7
1943213	99	29	28,0	cyclictest	0	-21	swapper/7	12:31:42	7
1943213	99	29	28,0	cyclictest	0	-21	swapper/7	10:55:24	7
1943213	99	29	28,0	cyclictest	0	-21	swapper/7	09:44:37	7
1943213	99	29	28,0	cyclictest	0	-21	swapper/7	09:18:28	7
1943213	99	29	26,2	cyclictest	2013753	-21	unixbench-2d	07:38:27	7
1943213	99	29	26,2	cyclictest	2013753	-21	unixbench-2d	07:38:27	7
1943208	99	29	27,2	cyclictest	2129745	-21	kworker/u16:3+events_unbound	08:58:53	5
1943208	99	29	27,2	cyclictest	1994671	-21	kworker/u16:0+flush-8:0	07:53:19	5
1943208	99	29	26,2	cyclictest	1994671	-21	kworker/u16:0+flush-8:0	08:08:03	5
1943213	99	28	25,2	cyclictest	2653019	-21	ssh	12:19:02	7
1943213	99	28	24,3	cyclictest	2469634	-21	ssh	11:04:17	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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